:root {
    --primary: #e50914;
    --bg-dark: #000000;
    --bg-card: #141414;
    --bg-card-hover: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --gradient-primary: linear-gradient(135deg, #e50914 0%, #b20710 100%);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
}
.app-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 68px;
    background: linear-gradient(180deg, rgba(0,0,0,0.9) 0%, transparent 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4%;
    z-index: 1000;
    transition: background 0.3s;
}
.app-header.scrolled {
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(20px);
}
.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.logo-icon {
    width: 36px; height: 36px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: white;
}

.logo-text .brand { font-size: 1.4rem; font-weight: 700; }
.logo-text .brand .super { color: var(--primary); }
.logo-text .brand .iptv { color: white; }
.nav-menu { display: flex; gap: 8px; }
.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.nav-menu a:hover { color: white; background: rgba(255,255,255,0.1); }
.nav-menu a.active { color: white; background: var(--primary); }

.main-content {
    padding-top: 100px;
    min-height: 100vh;
    padding-bottom: 60px;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 4%;
}
.page-hero { margin-bottom: 40px; }
.hero-content h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.hero-content h1 i { color: var(--primary); font-size: 2rem; }
.hero-content p { color: var(--text-secondary); font-size: 1.1rem; }

.settings-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
}
.settings-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}
.sidebar-nav {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    font-weight: 500;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
}
.sidebar-item:hover { background: rgba(255,255,255,0.05); color: white; }
.sidebar-item.active {
    background: var(--gradient-primary);
    color: white;
}
.sidebar-item i { width: 20px; text-align: center; font-size: 16px; }

.settings-content { min-height: 600px; }
.settings-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 32px;
    margin-bottom: 24px;
    display: none;
}
.settings-section.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
}
.section-icon {
    width: 56px; height: 56px;
    background: rgba(229,9,20,0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
}
.section-info h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 4px; }
.section-info p { color: var(--text-secondary); font-size: 14px; }

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-subtle);
}
.setting-item:last-child { border-bottom: none; }
.setting-label h3 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.setting-label p { font-size: 13px; color: var(--text-muted); }

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 52px; height: 28px;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: rgba(255,255,255,0.1);
    transition: 0.3s;
    border-radius: 28px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 22px; width: 22px;
    left: 3px; bottom: 3px;
    background: white;
    transition: 0.3s;
    border-radius: 50%;
}
input:checked + .slider { background: var(--gradient-primary); }
input:checked + .slider:before { transform: translateX(24px); }

/* Select */
.select-wrapper {
    position: relative;
}
.select-wrapper select {
    appearance: none;
    padding: 12px 40px 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    min-width: 180px;
    transition: var(--transition);
}
.select-wrapper select:focus {
    outline: none;
    border-color: var(--primary);
}
.select-wrapper::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 12px;
}
select option { background: #1a1a1a; color: white; }

/* Input */
.input-field {
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 14px;
    transition: var(--transition);
}
.input-field:focus { outline: none; border-color: var(--primary); }
.input-field::placeholder { color: var(--text-muted); }

/* PIN Input */
.pin-input {
    width: 120px;
    text-align: center;
    font-size: 1.5rem;
    letter-spacing: 8px;
}

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 16px;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.checkbox-label:hover { background: rgba(255,255,255,0.08); }
.checkbox-label input[type="checkbox"] {
    accent-color: var(--primary);
    width: 18px; height: 18px;
}

/* Time Select */
.time-select {
    display: flex;
    align-items: center;
    gap: 12px;
}
.time-select span { color: var(--text-muted); }

/* Buttons */
.btn-save {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}
.btn-save:hover { opacity: 0.9; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(229,9,20,0.3); }

.btn-danger {
    padding: 10px 20px;
    background: rgba(220,53,69,0.15);
    border: 1px solid rgba(220,53,69,0.3);
    border-radius: var(--radius-md);
    color: #dc3545;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.btn-danger:hover { background: rgba(220,53,69,0.25); }

/* Notification */
.notification {
    position: fixed;
    top: 90px; right: 20px;
    padding: 16px 24px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    color: white;
    opacity: 0;
    transform: translateX(100%);
    transition: var(--transition);
    z-index: 2000;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.notification.show { opacity: 1; transform: translateX(0); }
.notification.success { border-left: 4px solid #28a745; }
.notification.error { border-left: 4px solid #dc3545; }
.notification i { font-size: 20px; }
.notification.success i { color: #28a745; }
.notification.error i { color: #dc3545; }

/* Parental Settings */
#parentalSettings { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border-subtle); }

/* Responsive */
@media (max-width: 1024px) {
    .settings-layout { grid-template-columns: 1fr; }
    .settings-sidebar { position: static; }
    .sidebar-nav { flex-direction: row; overflow-x: auto; padding: 4px; }
    .sidebar-item { white-space: nowrap; padding: 12px 16px; }
    .nav-menu { display: none; }
}
@media (max-width: 768px) {
    .hero-content h1 { font-size: 1.8rem; }
    .settings-section { padding: 20px; }
    .setting-item { flex-direction: column; align-items: flex-start; gap: 16px; }
}