/* ============================================================
   BASE STYLES — Reset, Typography, Global Reset
   ============================================================ */

/* ── Google Fonts Import ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

/* ── Reset ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overflow-x: hidden;
}

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

/* ── Ambient Background Glow ── */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background:
        radial-gradient(circle 800px at 50% -20%, rgba(79, 70, 229, 0.12), transparent 70%),
        radial-gradient(circle 600px at 90% 40%, rgba(244, 63, 94, 0.05), transparent 70%);
    pointer-events: none;
    z-index: -1;
    will-change: transform;
}

.light-mode body::before {
    background:
        radial-gradient(circle 800px at 50% -20%, rgba(79, 70, 229, 0.06), transparent 70%),
        radial-gradient(circle 600px at 90% 40%, rgba(244, 63, 94, 0.03), transparent 70%);
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-md); }

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

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

.light-mode a {
    color: var(--primary-dark);
}

a:hover {
    color: var(--primary);
}

strong, b { font-weight: var(--weight-semibold); color: var(--text-primary); }
em, i { font-style: italic; }

small { font-size: var(--text-sm); color: var(--text-tertiary); }

::selection {
    background: var(--primary-200);
    color: var(--text-primary);
}

/* ── Lists ── */
ul, ol {
    list-style: none;
}

/* ── Images ── */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ── Forms ── */
input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    outline: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

/* ── Tables ── */
table {
    border-collapse: collapse;
    width: 100%;
}

/* ── HR ── */
hr {
    border: none;
    height: 1px;
    background: var(--divider);
    margin: var(--space-8) 0;
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-8);
    }
}

.container-narrow {
    max-width: var(--container-narrow);
}

/* ── Section ── */
.section {
    padding: var(--space-12) 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}

.section-title {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    letter-spacing: -0.04em;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

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

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

/* ── Utility Classes ── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.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); }

/* ── Keyframe Animations ── */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(0.95); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes tickerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Animation Utilities */
.animate-fade-in {
    animation: fadeIn var(--duration-slow) var(--ease-out) both;
}

.animate-slide-up-fade {
    animation: slideUpFade 600ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.animate-scale-in {
    animation: scaleIn 500ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.animate-slide-in-right {
    animation: slideInRight var(--duration-slow) var(--ease-out) both;
}

/* Delays */
.stagger-1 { animation-delay: 100ms; }
.stagger-2 { animation-delay: 200ms; }
.stagger-3 { animation-delay: 300ms; }
.stagger-4 { animation-delay: 400ms; }
.stagger-5 { animation-delay: 500ms; }
.stagger-6 { animation-delay: 600ms; }

/* ── Page Transition: Top Loading Bar ── */
.page-loader-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
    background-size: 200% 100%;
    z-index: 99999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
    animation: loaderBarShimmer 1.2s linear infinite;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 10px var(--primary), 0 0 5px var(--primary);
}

.page-loader-bar.active {
    opacity: 1;
    animation: loaderBarGrow 8s cubic-bezier(0.08, 0.82, 0.17, 1) forwards,
               loaderBarShimmer 1.2s linear infinite;
}

.page-loader-bar.done {
    width: 100% !important;
    opacity: 0;
    transition: width 0.2s ease, opacity 0.4s ease 0.2s;
}

@keyframes loaderBarGrow {
    0%   { width: 0; }
    20%  { width: 35%; }
    50%  { width: 65%; }
    80%  { width: 85%; }
    100% { width: 92%; }
}

@keyframes loaderBarShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ── Skeleton Overlay ── */
.skeleton-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: var(--bg-body);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.skeleton-overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* Skeleton header */
.skeleton-header {
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 var(--space-5);
    gap: var(--space-4);
}

.skeleton-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-nav-items {
    display: flex;
    gap: var(--space-3);
    flex: 1;
}

.skeleton-nav-item {
    height: 14px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

/* Skeleton body content */
.skeleton-body {
    flex: 1;
    padding: var(--space-8) var(--space-5);
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.skeleton-block {
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-title {
    height: 28px;
    width: 45%;
    border-radius: var(--radius-xs);
    background: var(--bg-tertiary);
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-card:nth-child(2) { animation-delay: 0.15s; }
.skeleton-card:nth-child(3) { animation-delay: 0.3s; }

@keyframes skeletonPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@media (max-width: 768px) {
    .skeleton-cards {
        grid-template-columns: 1fr;
    }
    .skeleton-nav-items {
        display: none;
    }
}