/* Apple-Inspired Dark Theme - Charcoal/Dark Mode */
:root {
    --bg-primary: #1d1d1f;
    --bg-secondary: #2c2c2e;
    --bg-tertiary: #3a3a3c;
    --bg-card: #2c2c2e;
    --bg-hover: #3a3a3c;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-tertiary: #86868b;
    --accent: #007aff;
    --accent-hover: #0051d5;
    --success: #34c759;
    --error: #ff3b30;
    --warning: #ff9500;
    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.container > * + * {
    margin-top: 2rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 2rem;
}

.card:last-child {
    margin-bottom: 0;
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

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

.btn-success:hover {
    background: #30d158;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: #ff2d55;
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.75rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 32px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: var(--transition);
    border-radius: 32px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 24px;
    width: 24px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .toggle-slider {
    background-color: var(--accent);
}

input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toggle-label span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(52, 199, 89, 0.2);
    color: var(--success);
    border: 1px solid rgba(52, 199, 89, 0.3);
}

.badge-error {
    background: rgba(255, 59, 48, 0.2);
    color: var(--error);
    border: 1px solid rgba(255, 59, 48, 0.3);
}

.badge-warning {
    background: rgba(255, 149, 0, 0.2);
    color: var(--warning);
    border: 1px solid rgba(255, 149, 0, 0.3);
}

.badge::before {
    content: '●';
    font-size: 0.75rem;
}

/* Messages */
.message {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    display: none;
    animation: slideIn 0.3s ease-out;
}

.message.show {
    display: block;
}

.message-success {
    background: rgba(52, 199, 89, 0.15);
    color: var(--success);
    border: 1px solid rgba(52, 199, 89, 0.3);
}

.message-error {
    background: rgba(255, 59, 48, 0.15);
    color: var(--error);
    border: 1px solid rgba(255, 59, 48, 0.3);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navigation */
.nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.nav-link {
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--accent);
    color: white;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2.5rem 0;
}

.header h1 {
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Grid */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Video Container */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 */
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Fullscreen: container sized so video fits fully on screen (no bottom crop on Android) */
.video-container:fullscreen,
.video-container:-webkit-full-screen,
.video-container:-moz-full-screen,
.video-container:-ms-fullscreen {
    padding-bottom: 0;
    width: 100vw;
    /* Leave room for Android nav bar / gesture area so video scales down and isn't cropped */
    height: 100vh;
    height: calc(100dvh - 72px);
    max-width: 100vw;
    max-height: calc(100vh - 72px);
    max-height: calc(100dvh - 72px);
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
}
.video-container:fullscreen video,
.video-container:-webkit-full-screen video,
.video-container:-moz-full-screen video,
.video-container:-ms-fullscreen video {
    position: relative;
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.fullscreen-btn {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s, transform 0.2s;
}
.fullscreen-btn:hover {
    opacity: 0.8;
    transform: scale(1.1);
}
.fullscreen-btn:focus {
    outline: none;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

.text-tertiary {
    color: var(--text-tertiary);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.flex {
    display: flex;
}

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

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}