/* ==========================================================================
   SMART FARMING DASHBOARD - MODERN ULTRA-RESPONSIVE DESIGN SYSTEM
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Prompt:wght@300;400;500;600;700&display=swap');

:root {
    --bg-dark: #060b11;
    --bg-card: rgba(15, 23, 42, 0.72);
    --bg-card-hover: rgba(22, 33, 58, 0.85);
    --bg-sidebar: #0b1322;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.16);

    /* Dynamic Theme Defaults */
    --primary: #10b981;
    --primary-hover: #059669;
    --accent: #34d399;
    --primary-glow: rgba(16, 185, 129, 0.25);

    /* Metric Indicator Colors */
    --temp-color: #f97316;
    --temp-glow: rgba(249, 115, 22, 0.2);
    --humidity-color: #0ea5e9;
    --humidity-glow: rgba(14, 165, 233, 0.2);
    --soil-color: #10b981;
    --soil-glow: rgba(16, 185, 129, 0.2);
    --adc-color: #a855f7;
    --adc-glow: rgba(168, 85, 247, 0.2);
    --light-color: #eab308;
    --light-glow: rgba(234, 179, 8, 0.2);
    --flow-color: #06b6d4;
    --flow-glow: rgba(6, 182, 212, 0.2);
    --water-color: #3b82f6;
    --water-glow: rgba(59, 130, 246, 0.2);
    --soil-ec-color: #8b5cf6;
    --soil-ph-color: #ec4899;
    --soil-temp-color: #f59e0b;
    --npk-n-color: #38bdf8;
    --npk-p-color: #facc15;
    --npk-k-color: #f43f5e;

    /* Typography Colors */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Sizing & Transitions */
    --sidebar-width: 270px;
    --topbar-height: 72px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 25px -5px var(--primary-glow);
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
    position: relative;
}

/* Ambient Background Layer */
.bg-ambient-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    transition: background 0.5s ease;
}

.ambient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.25;
    animation: floatOrb 22s infinite alternate ease-in-out;
}

.ambient-orb-1 {
    top: -10%;
    right: 5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

.ambient-orb-2 {
    bottom: -10%;
    left: 5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    animation-delay: -7s;
}

@keyframes floatOrb {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -30px) scale(1.1); }
    100% { transform: translate(-30px, 40px) scale(0.95); }
}

/* App Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar Navigation (Desktop) */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 22px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
}

.brand-badge {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px var(--primary-glow);
    flex-shrink: 0;
}

.brand-badge svg {
    width: 22px;
    height: 22px;
    stroke: #ffffff;
    stroke-width: 2.2;
    fill: none;
}

.brand-title {
    font-size: 1.12rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.brand-sub {
    font-size: 0.72rem;
    color: var(--text-dim);
    font-weight: 500;
}

.btn-close-sidebar {
    display: none;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #cbd5e1;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-close-sidebar:hover {
    color: #ffffff;
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.5);
}

.sidebar-menu {
    padding: 18px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    overflow-y: auto;
}

.menu-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 8px 12px 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-link svg {
    width: 19px;
    height: 19px;
    stroke-width: 2;
    flex-shrink: 0;
    transition: var(--transition);
}

.nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.08);
    transform: translateX(3px);
}

.nav-link.active {
    color: #ffffff;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.08));
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: inset 0 0 12px var(--primary-glow);
}

.nav-link.active svg {
    stroke: var(--accent);
}

.sidebar-footer {
    padding: 18px 16px;
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.25);
}

.user-snippet {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Main Content Area */
.main-wrapper {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: var(--transition);
}

/* Topbar Header */
.topbar {
    height: var(--topbar-height);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 16, 26, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-toggle-btn {
    display: none;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    align-items: center;
    justify-content: center;
}

.mobile-toggle-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.server-clock-badge {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.server-clock-badge strong {
    color: var(--accent);
    font-family: monospace;
    font-size: 0.95rem;
}

.live-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-size: 0.82rem;
    font-weight: 600;
    transition: var(--transition);
}

.live-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    box-shadow: 0 0 8px var(--primary);
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}

.btn-logout {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.25);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-logout:hover {
    background: #ef4444;
    color: #ffffff;
    border-color: #ef4444;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-logout svg {
    width: 16px;
    height: 16px;
}

/* Content Body */
.content-body {
    padding: 28px 32px 48px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-width: 0;
}

/* Welcome Hero Banner */
.welcome-hero {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(20, 30, 50, 0.6));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-card);
}

.welcome-content h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.welcome-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.device-status-badge {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

/* Metric Cards Grid */
.sensor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.sensor-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.sensor-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    transform: translateY(-4px);
}

.sensor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color);
    transition: var(--transition);
}

.card-temp:hover::before { background: var(--temp-color); box-shadow: 0 0 12px var(--temp-color); }
.card-humidity:hover::before { background: var(--humidity-color); box-shadow: 0 0 12px var(--humidity-color); }
.card-light:hover::before { background: var(--light-color); box-shadow: 0 0 12px var(--light-color); }
.card-flow:hover::before { background: var(--flow-color); box-shadow: 0 0 12px var(--flow-color); }
.card-water:hover::before { background: var(--water-color); box-shadow: 0 0 12px var(--water-color); }
.card-soil:hover::before { background: var(--soil-color); box-shadow: 0 0 12px var(--soil-color); }
.card-soil-temp:hover::before { background: var(--soil-temp-color); box-shadow: 0 0 12px var(--soil-temp-color); }
.card-soil-ec:hover::before { background: var(--soil-ec-color); box-shadow: 0 0 12px var(--soil-ec-color); }
.card-soil-ph:hover::before { background: var(--soil-ph-color); box-shadow: 0 0 12px var(--soil-ph-color); }
.card-npk:hover::before { background: linear-gradient(90deg, #38bdf8, #facc15, #f43f5e); box-shadow: 0 0 12px rgba(250, 204, 21, 0.4); }
.card-adc:hover::before { background: var(--adc-color); box-shadow: 0 0 12px var(--adc-color); }

.sensor-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.sensor-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: #ffffff;
}

.sensor-icon-box {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
}

.sensor-icon-box svg {
    width: 20px;
    height: 20px;
}

.card-temp .sensor-icon-box svg { stroke: var(--temp-color); }
.card-humidity .sensor-icon-box svg { stroke: var(--humidity-color); }
.card-light .sensor-icon-box svg { stroke: var(--light-color); }
.card-flow .sensor-icon-box svg { stroke: var(--flow-color); }
.card-water .sensor-icon-box svg { stroke: var(--water-color); }
.card-soil .sensor-icon-box svg { stroke: var(--soil-color); }
.card-soil-temp .sensor-icon-box svg { stroke: var(--soil-temp-color); }
.card-soil-ec .sensor-icon-box svg { stroke: var(--soil-ec-color); }
.card-soil-ph .sensor-icon-box svg { stroke: var(--soil-ph-color); }
.card-npk .sensor-icon-box svg { stroke: #facc15; }
.card-adc .sensor-icon-box svg { stroke: var(--adc-color); }

/* Sensor Category Group Titles */
.sensor-group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 24px 0 14px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.sensor-group-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sensor-group-badge {
    font-size: 0.72rem;
    padding: 3px 8px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    font-weight: 600;
}

/* NPK Soil Nutrients Mini Layout */
.npk-metric-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-top: 10px;
}
.npk-metric-box {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 8px 10px;
    text-align: center;
}
.npk-label {
    font-size: 0.72rem;
    font-weight: 700;
    margin-bottom: 2px;
}
.npk-value {
    font-size: 1.15rem;
    font-weight: 800;
    font-family: 'Plus Jakarta Sans', sans-serif;
}
.npk-unit {
    font-size: 0.65rem;
    color: var(--text-dim);
}

.sensor-value-wrapper {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 14px;
}

.sensor-val {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}

.sensor-unit {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dim);
}

.sensor-progress-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: 14px;
}

.sensor-progress-bar {
    height: 100%;
    border-radius: 99px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.bar-temp { background: linear-gradient(90deg, #fdba74, var(--temp-color)); }
.bar-humidity { background: linear-gradient(90deg, #7dd3fc, var(--humidity-color)); }
.bar-soil { background: linear-gradient(90deg, #6ee7b7, var(--soil-color)); }
.bar-adc { background: linear-gradient(90deg, #c084fc, var(--adc-color)); }

.sensor-status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-dim);
}

.sensor-pill {
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.72rem;
}

.pill-good { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.pill-warn { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.pill-alert { background: rgba(239, 68, 68, 0.15); color: #f87171; }

/* Dashboard Rows & Panels */
.dashboard-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.panel-card {
    flex: 1;
    min-width: 320px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}

.panel-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}

/* Tables & Responsive Wrapper */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-sm);
}

.telemetry-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.85rem;
    min-width: 600px;
}

.telemetry-table th {
    background: rgba(0, 0, 0, 0.35);
    padding: 12px 14px;
    color: var(--text-dim);
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.telemetry-table td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
}

.telemetry-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Section Box */
.section-box {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

/* 4-Channel Relays Grid */
.relays-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.relay-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-card);
}

.relay-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-3px);
}

.relay-card.active-state {
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 10px 30px -10px rgba(16, 185, 129, 0.2);
}

/* Relay Card Cover Image */
.relay-card-cover {
    position: relative;
    width: 100%;
    height: 130px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 14px;
    background: #08111a;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.relay-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.relay-card:hover .relay-card-cover img {
    transform: scale(1.04);
}

.relay-card-cover .cover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.05) 0%, rgba(10, 19, 30, 0.75) 100%);
    pointer-events: none;
}

.btn-upload-cover-hover {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    opacity: 0.85;
    transition: var(--transition);
}

.relay-card:hover .btn-upload-cover-hover {
    opacity: 1;
}

.btn-upload-cover-hover:hover {
    background: var(--primary);
    border-color: var(--primary);
}

.relay-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
}

.relay-name-title {
    font-size: 1.02rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.btn-edit-relay-name {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 3px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.btn-edit-relay-name:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.08);
}

.btn-edit-relay-name svg {
    width: 15px;
    height: 15px;
}

.relay-gpio-tag {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 2px;
}

.relay-badge-num {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.04);
    padding: 3px 8px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* Mode Switcher Buttons */
.mode-toggle-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    background: rgba(0, 0, 0, 0.35);
    padding: 4px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.btn-mode-select {
    background: transparent;
    border: none;
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-dim);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-mode-select:hover:not(:disabled) {
    color: #ffffff;
}

.btn-mode-select.active.mode-manual {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.4);
}

.btn-mode-select.active.mode-auto {
    background: rgba(139, 92, 246, 0.2);
    color: #c4b5fd;
    border: 1px solid rgba(139, 92, 246, 0.4);
}

.relay-switch-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.22);
    border: 1px solid var(--border-color);
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.relay-status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-lamp {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #475569;
    transition: var(--transition);
}

.status-lamp.lamp-on {
    background: #10b981;
    box-shadow: 0 0 12px #10b981;
}

.status-text-main {
    font-size: 0.88rem;
    font-weight: 700;
}

.status-sub-info {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 1px;
}

/* iOS Toggle Switch */
.switch-control {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.switch-control input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-round {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.15);
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 34px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.slider-round:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 3px;
    background-color: #ffffff;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

input:checked + .slider-round {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

input:checked + .slider-round:before {
    transform: translateX(24px);
}

input:disabled + .slider-round {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Schedules Section */
.schedules-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.schedules-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.schedules-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-add-timer {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-add-timer:hover {
    background: var(--primary);
    color: #ffffff;
}

.schedules-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.schedule-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.22);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 7px 10px;
    font-size: 0.78rem;
}

.schedule-time-badge {
    background: rgba(139, 92, 246, 0.15);
    color: #c4b5fd;
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.74rem;
}

.btn-delete-schedule {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-delete-schedule:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* Sensor Automation Rules Section */
.rules-section {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

.rules-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.rules-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: #38bdf8;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-add-rule {
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(56, 189, 248, 0.3);
    color: #38bdf8;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-add-rule:hover {
    background: #0284c7;
    color: #ffffff;
    border-color: #0284c7;
}

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.rule-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.22);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 7px 10px;
    font-size: 0.78rem;
}

.rule-badge {
    background: rgba(14, 165, 233, 0.15);
    color: #7dd3fc;
    border: 1px solid rgba(14, 165, 233, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.74rem;
}

.btn-delete-rule {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-delete-rule:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* API Guide Box */
.api-guide-box {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: var(--shadow-card);
}

.api-endpoint-badge {
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.code-snippet {
    background: #060b11;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--accent);
    margin: 10px 0 6px;
    word-break: break-all;
}

/* Modals & Overlays */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(4, 8, 14, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    padding: 16px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: #0d1522;
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    padding: 28px;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    transform: scale(0.95);
    transition: var(--transition);
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.modal-icon svg {
    width: 26px;
    height: 26px;
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: #ffffff;
    text-align: center;
    margin-bottom: 8px;
}

.modal-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.5;
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

.btn-modal {
    flex: 1;
    padding: 11px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
}

.btn-modal-cancel {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
}

.btn-modal-cancel:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

.btn-modal-confirm {
    background: #ef4444;
    color: #ffffff;
}

.btn-modal-confirm:hover {
    background: #dc2626;
}

/* Forms & Inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
}

.form-input, .filter-select, .filter-input {
    width: 100%;
    padding: 10px 14px;
    background: #060b11;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: #ffffff;
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus, .filter-select:focus, .filter-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Filter Controls Card */
.filter-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 26px;
    box-shadow: var(--shadow-card);
}

.filter-form {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 160px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-btn-group {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.btn-filter {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-filter:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--primary-glow);
}

.btn-reset {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-reset:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

.btn-export-csv {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.btn-export-csv:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.quick-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    flex-wrap: wrap;
}

.quick-pill {
    padding: 5px 12px;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.quick-pill:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.quick-pill.active {
    background: rgba(16, 185, 129, 0.18);
    color: var(--accent);
    border-color: rgba(16, 185, 129, 0.4);
}

/* Stats Summary Cards */
.stats-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.stat-summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-summary-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
}

.stat-summary-val {
    font-size: 1.6rem;
    font-weight: 800;
}

.stat-summary-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 4px;
}

/* Pagination Controls */
.pagination-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 18px;
    border-top: 1px solid var(--border-color);
    margin-top: 14px;
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-info {
    font-size: 0.82rem;
    color: var(--text-dim);
}

.pagination-nav {
    display: flex;
    gap: 6px;
}

.page-btn {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.page-btn:hover:not(.disabled) {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

.page-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.page-btn.disabled {
    opacity: 0.35;
    pointer-events: none;
}

/* Login Page Styles */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    position: relative;
    z-index: 1;
}

.login-card {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 40px 36px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8);
}

.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.brand-badge-large {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 6px 20px var(--primary-glow);
}

.brand-badge-large svg {
    width: 32px;
    height: 32px;
    stroke: #ffffff;
    stroke-width: 2.2;
}

.login-title {
    font-size: 1.7rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.03em;
    margin-bottom: 4px;
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    stroke: var(--text-dim);
    pointer-events: none;
}

.input-wrapper .form-input {
    padding-left: 44px;
    padding-right: 44px;
}

.btn-toggle-password {
    position: absolute;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 4px;
}

.btn-toggle-password svg {
    width: 18px;
    height: 18px;
}

.btn-submit {
    width: 100%;
    padding: 13px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 15px var(--primary-glow);
    margin-top: 20px;
    transition: var(--transition);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* Image Upload & Theme Customizer Styles */
.theme-presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 10px;
    margin-bottom: 24px;
}

.theme-preset-card {
    background: rgba(15, 23, 42, 0.6);
    border: 2px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 14px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.theme-preset-card:hover {
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.theme-preset-card.selected {
    border-color: var(--primary);
    box-shadow: 0 0 16px var(--primary-glow);
    background: rgba(15, 23, 42, 0.9);
}

.theme-color-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.color-dot {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.theme-preset-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: #ffffff;
}

.theme-preset-sub {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.wallpaper-preview-box {
    width: 100%;
    height: 200px;
    border-radius: 12px;
    overflow: hidden;
    background: #08111a;
    border: 1px dashed rgba(255, 255, 255, 0.18);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.wallpaper-preview-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.range-slider-group {
    margin-bottom: 18px;
}

.range-slider-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: #cbd5e1;
    margin-bottom: 8px;
}

.custom-range-slider {
    width: 100%;
    height: 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.custom-range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 8px var(--primary-glow);
    border: 2px solid #ffffff;
}

.image-upload-box {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    margin-bottom: 16px;
}

.image-preview-thumb {
    width: 80px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    background: #08111a;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   ULTRA RESPONSIVE BREAKPOINTS (Mobile, Tablet, Desktop)
   ========================================================================== */

/* 1. Large Tablet / Laptop (Max-width: 1024px) */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 250px;
        --topbar-height: 68px;
    }

    .topbar {
        padding: 0 20px;
    }

    .content-body {
        padding: 20px 20px 40px;
        gap: 20px;
    }

    .sensor-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .relays-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 2. Tablet & Mobile Drawer (Max-width: 900px) */
@media (max-width: 900px) {
    .sidebar {
        width: min(320px, 86vw) !important;
        background: #09101d !important;
        border-right: 1px solid rgba(255, 255, 255, 0.15) !important;
        box-shadow: 20px 0 50px rgba(0, 0, 0, 0.95) !important;
        z-index: 10000 !important;
        transform: translateX(-100%) !important;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    }

    .sidebar.open {
        transform: translateX(0) !important;
    }

    .btn-close-sidebar {
        display: inline-flex !important;
    }

    .main-wrapper {
        margin-left: 0 !important;
    }

    .mobile-toggle-btn {
        display: inline-flex !important;
    }

    .dashboard-row {
        flex-direction: column;
    }

    .panel-card {
        min-width: 100%;
    }

    .sidebar .nav-link {
        padding: 14px 16px;
        font-size: 0.95rem;
        color: #f1f5f9 !important;
    }

    .sidebar .nav-link:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #ffffff !important;
    }

    .sidebar .nav-link.active {
        background: linear-gradient(135deg, rgba(16, 185, 129, 0.3), rgba(16, 185, 129, 0.15)) !important;
        border-color: rgba(16, 185, 129, 0.5) !important;
        color: #ffffff !important;
    }
}

/* 3. Smartphone (Max-width: 640px) */
@media (max-width: 640px) {
    html {
        font-size: 15px;
    }

    .topbar {
        padding: 0 16px;
    }

    .content-body {
        padding: 16px 14px 36px;
        gap: 16px;
    }

    .welcome-hero {
        padding: 18px 16px;
        flex-direction: column;
        align-items: flex-start;
    }

    .sensor-grid {
        grid-template-columns: 1fr;
    }

    .relays-grid {
        grid-template-columns: 1fr;
    }

    .server-clock-badge span {
        display: none;
    }

    .btn-logout span {
        display: none;
    }

    .btn-logout {
        padding: 8px 10px;
    }

    .page-title {
        font-size: 1.05rem;
    }

    .login-card {
        padding: 30px 20px;
        border-radius: var(--radius-lg);
    }

    .filter-card {
        padding: 16px;
    }

    .filter-form {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-btn-group {
        width: 100%;
    }

    .btn-filter, .btn-reset, .btn-export-csv {
        flex: 1;
        justify-content: center;
    }

    .modal-card {
        padding: 20px 16px;
    }

    .theme-presets-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 4. Very Small Devices (Max-width: 380px) */
@media (max-width: 380px) {
    .theme-presets-grid {
        grid-template-columns: 1fr;
    }

    .relay-name-title {
        font-size: 0.95rem;
    }

    .sensor-val {
        font-size: 1.85rem;
    }
}

/* History Tabs & Activity Log Styles */
.history-tab-switcher {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    background: rgba(13, 21, 34, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    padding: 6px;
    border-radius: var(--radius-md);
    flex-wrap: wrap;
}

.history-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
}

.history-tab-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
}

.history-tab-btn.active {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
    border-color: rgba(255, 255, 255, 0.2);
}

.badge-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.badge-action-on {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.35);
    color: #4ade80;
}

.badge-action-off {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #f87171;
}

.badge-action-mode {
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid rgba(14, 165, 233, 0.35);
    color: #38bdf8;
}

.badge-action-auto {
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.35);
    color: #c084fc;
}

.badge-action-user {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.35);
    color: #fbbf24;
}

.badge-action-settings {
    background: rgba(20, 184, 166, 0.15);
    border: 1px solid rgba(20, 184, 166, 0.35);
    color: #2dd4bf;
}

.badge-action-auth {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.35);
    color: #818cf8;
}

/* ==========================================================================
   LIGHT MODE DESIGN SYSTEM & OVERRIDES
   ========================================================================== */

html[data-theme="light"] {
    --bg-dark: #f0f4f8;
    --bg-card: #ffffff;
    --bg-card-hover: #ffffff;
    --bg-sidebar: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-highlight: rgba(0, 0, 0, 0.16);

    /* Typography in Light Mode */
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;

    /* Shadow tokens */
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.02);
    --shadow-glow: 0 0 20px -5px var(--primary-glow);
}

/* Light Mode Specific Element Adjustments */
html[data-theme="light"] body {
    background-color: var(--bg-dark);
    color: var(--text-main);
}

html[data-theme="light"] .sidebar {
    background: #ffffff;
    border-right-color: rgba(0, 0, 0, 0.08);
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.03);
}

html[data-theme="light"] .sidebar-header {
    border-bottom-color: rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .brand-title {
    color: #0f172a;
}

html[data-theme="light"] .nav-link {
    color: #475569;
}

html[data-theme="light"] .nav-link:hover {
    color: var(--primary);
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.2);
}

html[data-theme="light"] .nav-link.active {
    color: var(--primary);
    background: rgba(16, 185, 129, 0.12);
    border-color: var(--primary);
}

html[data-theme="light"] .sidebar-footer {
    background: #f8fafc;
    border-top-color: rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .user-name {
    color: #0f172a;
}

html[data-theme="light"] .topbar {
    background: rgba(255, 255, 255, 0.88);
    border-bottom-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

html[data-theme="light"] .page-title {
    color: #0f172a;
}

html[data-theme="light"] .sensor-card,
html[data-theme="light"] .panel-card,
html[data-theme="light"] .stat-summary-card,
html[data-theme="light"] .filter-card,
html[data-theme="light"] .setting-card,
html[data-theme="light"] .relay-card,
html[data-theme="light"] .modal-card,
html[data-theme="light"] .login-card,
html[data-theme="light"] .section-box {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.02);
}

html[data-theme="light"] .sensor-card:hover,
html[data-theme="light"] .relay-card:hover,
html[data-theme="light"] .section-box:hover {
    box-shadow: 0 16px 30px -6px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 0, 0, 0.15);
}

html[data-theme="light"] .sensor-name,
html[data-theme="light"] .sensor-group-title,
html[data-theme="light"] .panel-title,
html[data-theme="light"] .relay-name,
html[data-theme="light"] .relay-name-title,
html[data-theme="light"] .setting-title,
html[data-theme="light"] .modal-title,
html[data-theme="light"] .login-title,
html[data-theme="light"] .section-box h3 {
    color: #0f172a;
}

html[data-theme="light"] .schedule-item,
html[data-theme="light"] .rule-item,
html[data-theme="light"] .section-box div[style*="background:rgba(0,0,0,0.25)"] {
    background: #f8fafc !important;
    border-color: rgba(0, 0, 0, 0.08) !important;
    color: #1e293b;
}

html[data-theme="light"] .section-box div[style*="color:#ffffff"] {
    color: #0f172a !important;
}

html[data-theme="light"] .sensor-icon-box {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .npk-metric-box {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .npk-value {
    color: #0f172a;
}

html[data-theme="light"] .telemetry-table th {
    background: #f8fafc;
    color: #475569;
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .telemetry-table td {
    border-bottom-color: rgba(0, 0, 0, 0.05);
    color: #1e293b;
}

html[data-theme="light"] .telemetry-table tbody tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

html[data-theme="light"] .filter-input,
html[data-theme="light"] .filter-select,
html[data-theme="light"] .settings-input,
html[data-theme="light"] .settings-select,
html[data-theme="light"] .form-input,
html[data-theme="light"] .form-select,
html[data-theme="light"] .input-box input {
    background: #ffffff;
    color: #0f172a;
    border-color: rgba(0, 0, 0, 0.15);
}

html[data-theme="light"] .filter-input:focus,
html[data-theme="light"] .filter-select:focus,
html[data-theme="light"] .settings-input:focus,
html[data-theme="light"] .settings-select:focus,
html[data-theme="light"] .input-box input:focus {
    background: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

html[data-theme="light"] .quick-pill {
    background: #f1f5f9;
    color: #475569;
    border-color: rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .quick-pill:hover,
html[data-theme="light"] .quick-pill.active {
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary);
    border-color: var(--primary);
}

html[data-theme="light"] .btn-reset {
    background: #f1f5f9;
    color: #475569;
    border-color: rgba(0, 0, 0, 0.1);
}

html[data-theme="light"] .btn-reset:hover {
    background: #e2e8f0;
    color: #0f172a;
}

html[data-theme="light"] .history-tab-switcher {
    background: #e2e8f0;
    border-color: rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .history-tab-btn {
    color: #64748b;
}

html[data-theme="light"] .history-tab-btn:hover {
    color: #0f172a;
}

html[data-theme="light"] .history-tab-btn.active {
    background: #ffffff;
    color: var(--primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .page-btn {
    background: #ffffff;
    color: #475569;
    border-color: rgba(0, 0, 0, 0.1);
}

html[data-theme="light"] .page-btn:hover {
    background: #f8fafc;
    color: #0f172a;
    border-color: rgba(0, 0, 0, 0.18);
}

html[data-theme="light"] .page-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

html[data-theme="light"] .modal-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.1);
}

html[data-theme="light"] .modal-overlay {
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(8px);
}

html[data-theme="light"] .modal-desc {
    color: #475569;
}

html[data-theme="light"] .ambient-orb {
    opacity: 0.12 !important;
}

html[data-theme="light"] .badge-action-on {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.3);
    color: #15803d;
}

html[data-theme="light"] .badge-action-off {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.3);
    color: #b91c1c;
}

html[data-theme="light"] .badge-action-mode {
    background: rgba(14, 165, 233, 0.12);
    border-color: rgba(14, 165, 233, 0.3);
    color: #0369a1;
}

html[data-theme="light"] .badge-action-auto {
    background: rgba(168, 85, 247, 0.12);
    border-color: rgba(168, 85, 247, 0.3);
    color: #7e22ce;
}

html[data-theme="light"] .badge-action-user {
    background: rgba(245, 158, 11, 0.12);
    border-color: rgba(245, 158, 11, 0.3);
    color: #b45309;
}

html[data-theme="light"] .badge-action-settings {
    background: rgba(20, 184, 166, 0.12);
    border-color: rgba(20, 184, 166, 0.3);
    color: #0f766e;
}

html[data-theme="light"] .badge-action-auth {
    background: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.3);
    color: #4338ca;
}

/* Theme Toggle Button */
.btn-theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: #facc15;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.btn-theme-toggle:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: var(--border-highlight);
    transform: scale(1.05);
}

html[data-theme="light"] .btn-theme-toggle {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.1);
    color: #0284c7;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .btn-theme-toggle:hover {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.18);
    color: #0369a1;
}

.btn-theme-toggle .theme-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
}

/* In dark mode: show sun icon (click to switch to light) */
html:not([data-theme="light"]) .btn-theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

html:not([data-theme="light"]) .btn-theme-toggle .moon-icon {
    opacity: 0;
    position: absolute;
    transform: rotate(90deg) scale(0);
}

/* In light mode: show moon icon (click to switch to dark) */
html[data-theme="light"] .btn-theme-toggle .sun-icon {
    opacity: 0;
    position: absolute;
    transform: rotate(-90deg) scale(0);
}

html[data-theme="light"] .btn-theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}