/* ============================================
   ProCode EduPulse — Global Styles
   ============================================ */

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

/* ── Reset ── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
#app {
  transition: opacity 0.25s ease;
}
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ── Enhanced Dark Mode Background ── */
[data-theme="dark"] {
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--radius-full);
}

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

/* ── Typography ── */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

a {
    color: var(--brand-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--brand-accent);
}

code,
pre,
kbd {
    font-family: var(--font-mono);
}

code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--brand-accent);
}

pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    overflow-x: auto;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul,
ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: var(--font-primary);
    border: none;
    outline: none;
    background: none;
}

input,
textarea,
select {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    outline: none;
    border: none;
}

/* ── Layout Utilities ── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm {
    max-width: var(--container-sm);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.page-wrapper {
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

/* ── Flex Utilities ── */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-end {
    justify-content: flex-end;
}

.gap-1 {
    gap: var(--space-1);
}

.gap-2 {
    gap: var(--space-2);
}

.gap-3 {
    gap: var(--space-3);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

.flex-1 {
    flex: 1;
}

/* ── Grid Utilities ── */
.grid {
    display: grid;
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ── Text Utilities ── */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-gradient {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

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

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

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

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

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

.text-sm {
    font-size: var(--text-sm);
}

.text-lg {
    font-size: var(--text-lg);
}

.font-medium {
    font-weight: var(--font-medium);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-bold {
    font-weight: var(--font-bold);
}

.font-mono {
    font-family: var(--font-mono);
}

/* ── Spacing Utilities ── */
.mt-2 {
    margin-top: var(--space-2);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-6 {
    margin-top: var(--space-6);
}

.mt-8 {
    margin-top: var(--space-8);
}

.mb-2 {
    margin-bottom: var(--space-2);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.p-4 {
    padding: var(--space-4);
}

.p-6 {
    padding: var(--space-6);
}

.p-8 {
    padding: var(--space-8);
}

/* ── Display ── */
.hidden {
    display: none !important;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

.relative {
    position: relative;
}

/* ── Background pattern ── */
.bg-grid-pattern {
    background-image:
        linear-gradient(rgba(0, 120, 212, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 120, 212, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
}

.bg-dots-pattern {
    background-image: radial-gradient(circle, rgba(0, 120, 212, 0.08) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* ── Selection ── */
::selection {
    background: rgba(0, 120, 212, 0.3);
    color: var(--text-primary);
}

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

/* ── Animations ── */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 0 rgba(0, 120, 212, 0);
    }

    50% {
        box-shadow: 0 0 20px rgba(0, 120, 212, 0.3);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease forwards;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeInDown {
    animation: fadeInDown 0.6s ease forwards;
}

.animate-scaleIn {
    animation: scaleIn 0.4s ease forwards;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ── Stagger Delay Utilities ── */
.delay-1 {
    animation-delay: 100ms;
}

.delay-2 {
    animation-delay: 200ms;
}

.delay-3 {
    animation-delay: 300ms;
}

.delay-4 {
    animation-delay: 400ms;
}

.delay-5 {
    animation-delay: 500ms;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }

    h1 {
        font-size: var(--text-4xl);
    }

    h2 {
        font-size: var(--text-3xl);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .hide-mobile {
        display: none !important;
    }
    
    /* Mobile-specific adjustments */
    .page-wrapper {
        padding-top: calc(var(--navbar-height) + env(safe-area-inset-top));
    }
    
    /* Better touch targets */
    button, a, .nav-link {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Mobile navigation improvements */
    .navbar {
        padding: var(--space-2) var(--space-4);
    }
    
    .nav-links {
        gap: var(--space-1);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .nav-links::-webkit-scrollbar {
        display: none;
    }
    
    .nav-link {
        white-space: nowrap;
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-sm);
    }
    
    /* Mobile form improvements */
    input, textarea, select {
        font-size: 16px; /* Prevent zoom on iOS */
        -webkit-appearance: none;
        appearance: none;
        border-radius: var(--radius-md);
    }
    
    /* Mobile cards */
    .card {
        margin: var(--space-2) 0;
        border-radius: var(--radius-lg);
    }
    
    /* Mobile tables */
    table {
        font-size: var(--text-sm);
    }
    
    th, td {
        padding: var(--space-2);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }

    h1 {
        font-size: var(--text-2xl); /* Decrease huge headers to wrap gracefully */
    }

    h2 {
        font-size: var(--text-xl);
    }
    
    /* Extra small mobile adjustments */
    .page-header {
        text-align: center;
        padding: var(--space-4) 0;
    }
    
    .page-title {
        font-size: var(--text-xl);
        line-height: var(--leading-tight);
    }
    
    .page-description {
        font-size: var(--text-base);
    }
    
    /* Mobile buttons */
    .btn {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
        margin: var(--space-2) 0;
    }
    
    .btn-group {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    /* Mobile modals */
    .modal-content {
        margin: var(--space-4);
        max-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - var(--space-8));
        border-radius: var(--radius-lg);
    }
    
    /* Mobile grid adjustments */
    .grid {
        gap: var(--space-3);
    }
    
    /* Mobile spacing */
    .section {
        padding: var(--space-6) 0;
    }
    
    /* Mobile typography */
    .text-lg {
        font-size: var(--text-base);
    }
    
    .text-xl {
        font-size: var(--text-lg);
    }
    
    /* Mobile navigation improvements */
    .nav-brand-text {
        font-size: var(--text-lg);
    }
    
    /* Mobile safe area handling */
    @supports (padding: max(0px)) {
        .page-wrapper {
            padding-left: max(var(--space-4), env(safe-area-inset-left));
            padding-right: max(var(--space-4), env(safe-area-inset-right));
        }
        
        .navbar {
            padding-left: max(var(--space-4), env(safe-area-inset-left));
            padding-right: max(var(--space-4), env(safe-area-inset-right));
        }
        
        .modal-content {
            margin-left: max(var(--space-4), env(safe-area-inset-left));
            margin-right: max(var(--space-4), env(safe-area-inset-right));
        }
    }
}

/* ── Landscape Mobile Adjustments ── */
@media (max-width: 768px) and (orientation: landscape) {
    .page-wrapper {
        padding-top: calc(var(--navbar-height) + env(safe-area-inset-top));
    }
    
    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* ── High DPI Displays ── */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Optimize for retina displays */
    .user-avatar, .participant-avatar {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ── Dark Mode Preference ── */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg-primary: #0F0F1A;
        --bg-secondary: #1A1A2E;
        --bg-tertiary: #222240;
        --bg-elevated: #2A2A4A;
        --bg-card: rgba(26, 26, 46, 0.8);
        --bg-card-hover: rgba(42, 42, 74, 0.9);
        --bg-glass: rgba(15, 15, 26, 0.7);
        --bg-input: rgba(34, 34, 64, 0.6);

        --border-primary: rgba(0, 120, 212, 0.2);
        --border-subtle: rgba(255, 255, 255, 0.08);
        --border-hover: rgba(0, 120, 212, 0.4);

        --text-primary: #F0F0F8;
        --text-secondary: #A0A0C0;
        --text-muted: #6B6B8D;
        --text-inverse: #0F0F1A;

        --scrollbar-track: #1A1A2E;
        --scrollbar-thumb: #3A3A5A;
        --scrollbar-thumb-hover: #4A4A6A;
    }
}

/* ── Light Mode Preference ── */
@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bg-primary: #F8F9FC;
        --bg-secondary: #FFFFFF;
        --bg-tertiary: #F0F1F5;
        --bg-elevated: #FFFFFF;
        --bg-card: rgba(255, 255, 255, 0.9);
        --bg-card-hover: rgba(255, 255, 255, 1);
        --bg-glass: rgba(248, 249, 252, 0.85);
        --bg-input: rgba(240, 241, 245, 0.8);

        --border-primary: rgba(0, 120, 212, 0.25);
        --border-subtle: rgba(0, 0, 0, 0.1);
        --border-hover: rgba(0, 120, 212, 0.5);

        --text-primary: #1A1A2E;
        --text-secondary: #5A5A7A;
        --text-muted: #9A9AB0;
        --text-inverse: #F0F0F8;

        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
        --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
        --shadow-xl: 0 16px 50px rgba(0, 0, 0, 0.15);

        --scrollbar-track: #F0F1F5;
        --scrollbar-thumb: #C8C8D8;
        --scrollbar-thumb-hover: #A8A8C0;
    }
}