:root {
    --bg-main: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --border-card: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.4);
    --accent-green: #10b981;
    --accent-green-glow: rgba(16, 185, 129, 0.4);
    --accent-red: #ef4444;
    --radius-lg: 20px;
    --radius-md: 12px;
    --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
    padding-bottom: env(safe-area-inset-bottom);
}

.app-container {
    width: 100%;
    max-width: 480px;
    padding: 16px;
    padding-top: calc(16px + env(safe-area-inset-top));
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Install Banner */
.install-banner {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(16, 185, 129, 0.2));
    border: 1px solid rgba(59, 130, 246, 0.4);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.install-banner.hidden {
    display: none;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.banner-icon {
    font-size: 1.5rem;
    color: var(--accent-blue);
}

.banner-text {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
}

.banner-text strong {
    font-size: 0.95rem;
    color: #fff;
}

.banner-text span {
    color: var(--text-secondary);
}

.btn-install {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-blue-glow);
}

.btn-close-banner {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 4px;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-blue), #1d4ed8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
    box-shadow: 0 4px 15px var(--accent-blue-glow);
}

.app-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Status Badge */
.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot-off {
    background-color: var(--accent-red);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.6);
}

.dot-on {
    background-color: var(--accent-green);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.8);
    animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
}

/* Main Cards */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-main);
}

.hidden {
    display: none !important;
}

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

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-blue {
    color: var(--accent-blue);
}

/* Toggle Card */
.toggle-card {
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-main);
}

.toggle-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
}

.toggle-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* 3D Power Switch */
.switch-wrapper {
    margin: 28px 0 20px 0;
}

.power-switch {
    position: relative;
    display: inline-block;
    width: 100px;
    height: 100px;
}

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

.power-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle, #1e293b 0%, #0f172a 100%);
    border: 3px solid #334155;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
    box-shadow: 
        inset 0 4px 10px rgba(0, 0, 0, 0.6),
        0 10px 20px rgba(0, 0, 0, 0.4);
}

.power-icon {
    font-size: 2.4rem;
    color: var(--text-secondary);
    transition: all 0.4s ease;
}

.power-switch input:checked + .power-slider {
    border-color: var(--accent-green);
    background: radial-gradient(circle, #064e3b 0%, #022c22 100%);
    box-shadow: 
        inset 0 2px 8px rgba(16, 185, 129, 0.4),
        0 0 30px var(--accent-green-glow);
}

.power-switch input:checked + .power-slider .power-icon {
    color: #34d399;
    filter: drop-shadow(0 0 10px rgba(52, 211, 153, 0.8));
    transform: scale(1.1);
}

.toggle-status-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.toggle-status-text.active {
    color: var(--accent-green);
}

/* Details Card & Address */
.address-box {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 12px;
    font-size: 0.9rem;
    line-height: 1.4;
    color: #e2e8f0;
    margin-bottom: 14px;
}

.quick-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.quick-actions .btn-success {
    grid-column: span 2;
}

.btn {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: none;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-primary);
}

.btn:active {
    transform: scale(0.97);
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.metric-icon {
    font-size: 1.3rem;
    color: var(--accent-blue);
}

.metric-info {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.metric-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-top: 2px;
}

/* Map Card */
.map-view {
    width: 100%;
    height: 220px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-card);
}

/* Settings Guide Card */
.guide-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 14px;
}

.device-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shortcut-box {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 12px;
}

.shortcut-title {
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.icon-android { color: #3ddc84; }
.icon-apple { color: #a2aaad; }

.shortcut-box p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.shortcut-box .btn {
    width: 100%;
}

/* PWA Steps */
.pwa-steps {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pwa-step {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.step-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.pwa-step strong {
    color: #fff;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 16px 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
}