/* 
 * SuperStudies Premium Dark Theme
 * A modern, state-of-the-art design system for 2026
 */

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

:root {
    /* Deep Space Palette */
    --bg-dark: #020617;
    /* Slate 950 */
    --bg-surface: #0f172a;
    /* Slate 900 */
    --bg-surface-light: #1e293b;
    /* Slate 800 */

    /* Neon Accents */
    --primary: #6366f1;
    /* Indigo 500 */
    --primary-light: #818cf8;
    /* Indigo 400 */
    --secondary: #ec4899;
    /* Pink 500 */
    --accent: #8b5cf6;
    /* Violet 500 */

    /* Text */
    --text-primary: #f8fafc;
    /* Slate 50 */
    --text-secondary: #e2e8f0;
    /* Slate 200 */
    --text-muted: #cbd5e1;
    /* Slate 300 */

    /* Glassmorphism */
    --glass-bg: rgba(15, 23, 42, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);

    /* Misc */
    --radius-xl: 1.25rem;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Global Reset & Styling */
/* Custom Scrollbar for Futuristic UI */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 10px;
    transition: var(--transition-smooth);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

body {
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(236, 72, 153, 0.08) 0%, transparent 40%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6,
.navbar-brand {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    letter-spacing: -0.04em;
    text-transform: tracking-tight;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary) !important;
}

/* Bootstrap Overrides for Contrast */
.text-muted {
    color: var(--text-muted) !important;
}

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

.bg-light {
    background-color: var(--bg-surface-light) !important;
}

.bg-white {
    background-color: var(--bg-surface) !important;
}

.text-dark {
    color: var(--text-primary) !important;
}

.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--glass-border);
}

.card-header {
    background-color: rgba(255, 255, 255, 0.03) !important;
    border-bottom: 1px solid var(--glass-border) !important;
    color: var(--text-primary) !important;
}

/* Alert Overrides */
.alert-primary {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%) !important;
    border: 1px solid rgba(99, 102, 241, 0.3) !important;
    color: var(--text-primary) !important;
}

.alert-primary h1,
.alert-primary h2,
.alert-primary h3,
.alert-primary h4 {
    color: var(--text-primary) !important;
}

.alert-info {
    background: rgba(30, 41, 59, 0.5) !important;
    border: 1px dashed var(--glass-border) !important;
    color: var(--text-secondary) !important;
}

/* Empty State Styling */
.empty-state-text {
    color: var(--text-secondary) !important;
}

/* List Group Overrides */
.list-group-item {
    background-color: transparent !important;
    border-color: var(--glass-border) !important;
    color: var(--text-primary) !important;
}

.list-group-flush .list-group-item {
    border-width: 0 0 1px 0 !important;
}

/* Modal Themes */
.modal-content {
    background: var(--bg-surface) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--glass-shadow) !important;
    overflow: hidden;
}

.modal-header, .modal-footer {
    border: none !important;
    padding: 1.5rem !important;
}

.modal-header .btn-close {
    filter: invert(1) brightness(2);
    opacity: 0.8;
}

.modal-title {
    color: var(--text-primary) !important;
}

/* Badge Overrides */
.badge.bg-warning {
    background-color: #f59e0b !important;
    color: var(--bg-dark) !important;
}

.badge.bg-info {
    background-color: #3b82f6 !important;
    color: var(--text-primary) !important;
}

.badge.bg-light {
    background-color: var(--bg-surface-light) !important;
    color: var(--text-primary) !important;
}

/* Navbar Overhaul */
.navbar {
    background: rgba(2, 6, 23, 0.8) !important;
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.6rem 0;
    margin-bottom: 2rem;
    position: sticky;
    top: 0;
    z-index: 1050;
}

.navbar-nav {
    display: flex;
    flex-wrap: nowrap !important; /* Force single row on desktop */
    align-items: center;
}
.nav-item { white-space: nowrap; }

@media (max-width: 1400px) {
    .navbar-nav .nav-link { 
        font-size: 0.8rem; 
        padding-left: 0.35rem !important; 
        padding-right: 0.35rem !important; 
    }
    .navbar-nav .nav-link i { display: none; } /* Hide icons to save space on smaller desktop/tablet width */
    .navbar-brand { font-size: 1.1rem; }
}
@media (max-width: 991px) {
    .navbar-nav { flex-direction: column; align-items: flex-start; flex-wrap: wrap !important; }
    .nav-item { width: 100%; white-space: normal; }
    .navbar-nav .nav-link i { display: inline-block; } /* Show icons in mobile menu */
}

.dropdown-menu {
    background: var(--bg-surface) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: 12px !important;
    box-shadow: var(--glass-shadow) !important;
    padding: 0.5rem !important;
    margin-top: 0.5rem !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1100 !important;
}

.dropdown-item {
    color: var(--text-secondary) !important;
    border-radius: 8px;
    padding: 0.6rem 1rem !important;
    transition: var(--transition-smooth);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    color: #fff !important;
}

.logout-link:hover {
    background: rgba(236, 72, 153, 0.1) !important;
    color: var(--secondary) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-smooth);
}

.nav-link {
    font-weight: 600;
    color: var(--text-secondary) !important;
    padding: 0.5rem 0.75rem !important;
    margin: 0 0.15rem;
    position: relative;
    transition: var(--transition-smooth);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    outline: none !important;
    box-shadow: none !important;
    border-bottom: none !important;
}

.nav-link:focus, 
.nav-link:active,
.dropdown-toggle:focus,
.dropdown-toggle:active {
    box-shadow: none !important;
    outline: none !important;
    border: none !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
    box-shadow: 0 0 10px var(--primary);
}

.nav-link:hover {
    color: #fff !important;
}

.nav-link.active {
    color: #fff !important;
}

.nav-link.active::after,
.nav-link:hover::after,
.nav-link.show::after,
.nav-link[aria-expanded="true"]::after {
    opacity: 1;
    bottom: -2px;
}

/* Hero Section */
.hero-section {
    padding: 100px 0;
    text-align: center;
    position: relative;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, #6366f1 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

/* Text Gradient */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.text-premium {
    color: #a855f7;
    text-shadow: 0 0 10px rgba(168, 85, 247, 0.3);
}

/* Glass Card Refinements */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    transition: var(--transition-smooth);
    box-shadow: var(--glass-shadow);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Stunning Glass Cards */
.card {
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
    transition: var(--transition-smooth);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    color: var(--text-primary);
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(99, 102, 241, 0.1);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.05), transparent 50%);
    pointer-events: none;
}

.slick-card {
    border-color: rgba(99, 102, 241, 0.15) !important;
}

/* Success Button for Study State */
.btn-success {
    background: rgba(34, 197, 94, 0.08) !important;
    border: 1px solid rgba(34, 197, 94, 0.3) !important;
    color: #4ade80 !important;
    transition: var(--transition-smooth);
}

.btn-success:hover {
    background: rgba(34, 197, 94, 0.15) !important;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.2);
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    border: none;
    padding: 0.8rem 2rem;
    font-weight: 600;
    border-radius: 100px;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transition: var(--transition-smooth);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1.25rem !important;
    font-size: 0.875rem !important;
    border-radius: 10px !important;
}

.btn-outline-primary {
    border-color: rgba(99, 102, 241, 0.4) !important;
    color: var(--primary-light) !important;
    transition: var(--transition-smooth);
}

.btn-outline-primary:hover {
    background: rgba(99, 102, 241, 0.1) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}

.btn-outline-danger {
    border-color: rgba(239, 68, 68, 0.4) !important;
    color: #f87171 !important;
}

.btn-outline-danger:hover {
    background: rgba(239, 68, 68, 0.1) !important;
    border-color: #ef4444 !important;
    color: #fff !important;
}

/* Form Controls */
.form-control {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--glass-border);
    color: #fff;
    border-radius: 12px;
    padding: 0.8rem 1.2rem;
}

.form-control:focus {
    background: rgba(15, 23, 42, 0.6);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    color: #fff;
}

.form-select {
    background-color: rgba(15, 23, 42, 0.4) !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23cbd5e1' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e") !important;
    background-repeat: no-repeat !important;
    background-position: right 1.25rem center !important;
    background-size: 16px 12px !important;
    border: 1px solid var(--glass-border) !important;
    color: #fff !important;
    border-radius: 12px !important;
    padding: 0.8rem 2.5rem 0.8rem 1.2rem !important;
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
}

.form-select:focus {
    background-color: rgba(15, 23, 42, 0.6) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15) !important;
    color: #fff !important;
}

.form-label {
    color: var(--text-secondary) !important;
    font-weight: 500 !important;
}

.form-text {
    color: var(--text-muted) !important;
}

/* Custom listbox in multiple select */
select[multiple] {
    height: auto !important;
    background-image: none !important;
}

select[multiple] option {
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 2px;
}

select[multiple] option:checked {
    background-color: var(--primary) !important;
    color: white !important;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Onboarding Premium Banner */
.onboarding-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.9) 0%, rgba(139, 92, 246, 0.9) 100%) !important;
    border: none !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: #fff !important;
    padding: 0.75rem 0 !important;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1040;
}

.onboarding-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shine 3s infinite;
}

.onboarding-banner .alert-link {
    color: #fff !important;
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: var(--transition-smooth);
}

.onboarding-banner .alert-link:hover {
    opacity: 0.8;
    text-decoration: none;
}

.onboarding-banner .btn-close {
    filter: invert(1) grayscale(1) brightness(2);
    opacity: 0.8;
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 100%; }
    100% { left: 100%; }
}

@keyframes pulse-soft {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.pulse-icon {
    display: inline-block;
    animation: pulse-soft 2s infinite ease-in-out;
}

/* ── Responsive fixes ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }

    /* Mobile navbar: allow scroll without clipping dropdowns */
    #navbarNav.show {
        max-height: 80vh;
        overflow-y: auto;
        overflow-x: visible;
    }

    /* Typography scale-down */
    h1, .h1 { font-size: 1.75rem !important; }
    h2, .h2 { font-size: 1.5rem !important; }
    h3, .h3 { font-size: 1.25rem !important; }

    /* Navbar: tighten brand */
    .navbar-brand { font-size: 1.1rem !important; }

    /* Cards: reduce padding on small screens */
    .card-body { padding: 1rem !important; }
    .glass-card .card-body { padding: 1.25rem !important; }

    /* Tables: force horizontal scroll */
    .table-responsive-always { overflow-x: auto; -webkit-overflow-scrolling: touch; }

    /* Buttons: don't let them shrink weirdly */
    .btn { white-space: nowrap; }

    /* Stat numbers */
    .stat-number { font-size: 1.6rem !important; }

    /* Sidebar below main content */
    .col-lg-3, .col-lg-4 { margin-top: 1.5rem; }

    /* Footer: stack columns */
    footer .col-md-4 { margin-bottom: 1.5rem; }

    /* Planner / curriculum cards */
    .subject-card { margin-bottom: 1rem; }

    /* Hide long text labels on mobile */
    .d-mobile-none { display: none !important; }

    /* Full-width CTAs */
    .btn-mobile-full { width: 100% !important; display: block !important; }

    /* Modal full-width on mobile */
    .modal-dialog { margin: 0.5rem; }
}

@media (max-width: 576px) {
    /* Extra small: reduce container padding */
    .container, .container-fluid { padding-left: 0.75rem; padding-right: 0.75rem; }

    /* Stack flex rows */
    .d-flex.flex-row { flex-wrap: wrap; }

    /* Reduce gap in flex grids */
    .gap-3 { gap: 0.75rem !important; }
    .gap-4 { gap: 1rem !important; }

    /* Breadcrumbs: truncate */
    .breadcrumb-item + .breadcrumb-item { display: none; }
    .breadcrumb-item + .breadcrumb-item:last-child { display: list-item; }

    /* AI Tutor chat */
    .chat-input-area { padding: 0.5rem !important; }
}

/* Premium Modal Styling */
.modal-content.premium-modal {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
}

.premium-modal .modal-header,
.premium-modal .modal-footer {
    border: none;
}

.premium-modal .form-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.premium-modal .form-control,
.premium-modal .form-control:disabled,
.premium-modal .form-select,
.premium-modal .form-select:disabled {
    background-color: var(--bg-surface-light);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.premium-modal .form-control:focus,
.premium-modal .form-select:focus {
    background-color: var(--bg-surface-light);
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
    color: var(--text-primary);
}

.premium-modal .form-text {
    color: var(--text-muted);
}

.premium-modal .alert-info {
    background-color: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
}

.premium-modal .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}