/* ==========================================
   Atlas Metin - Recruiting Portal
   Design System & Styles
   ========================================== */

/* === CSS Variables === */
:root {
    /* Dark athletic theme */
    --bg-primary: #0a0f1a;
    --bg-secondary: #111827;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);

    /* Text colors */
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    /* Accent colors - athletic/aquatic */
    --accent-primary: #3b82f6;
    --accent-secondary: #06b6d4;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-card: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

/* === Typography === */
h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

/* === Layout === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-3xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    font-size: 1.1rem;
}

/* === Navigation === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 15, 26, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    padding-top: calc(var(--space-3xl) + 60px);
    background:
        linear-gradient(to bottom, rgba(10, 15, 26, 0.7) 0%, rgba(10, 15, 26, 0.95) 60%, var(--bg-primary) 100%),
        url('assets/atlas-swim.jpg') center top / cover no-repeat;
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-photo {
    margin-bottom: var(--space-xl);
}

.profile-photo {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border-radius: 50%;
    border: 4px solid var(--accent-primary);
    object-fit: cover;
    box-shadow: var(--shadow-glow);
}

.hero-name {
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.hero-age {
    color: var(--accent-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-xl);
    font-weight: 500;
}

/* === Stats Rows === */
.stats-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-xl);
}

.academic-stats {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.swim-stats {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
}

.stats-row .stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stats-row .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === Buttons === */
.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
    color: white;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.btn-icon {
    font-size: 1.1rem;
}

/* === Trajectory Grid === */
.trajectory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.trajectory-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.trajectory-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.trajectory-card.qualified {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.05);
}

.trajectory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.trajectory-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.current-time {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cuts-display {
    margin-bottom: var(--space-lg);
}

.cut-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cut-row:last-child {
    border-bottom: none;
}

.cut-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.cut-time {
    color: var(--text-primary);
    font-weight: 600;
}

.cut-gap {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-warning);
}

.cut-gap.near {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-success);
}

.cut-gap.qualified {
    background: rgba(16, 185, 129, 0.3);
    color: var(--accent-success);
}

.trajectory-projection {
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
}

.trajectory-projection p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

.trajectory-projection p:last-child {
    margin-bottom: 0;
}

.trajectory-projection strong {
    color: var(--accent-primary);
}

.cohort-stat {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cohort-stat .percentile {
    color: var(--accent-secondary);
    font-weight: 600;
}

/* === Chart Section === */
.chart-section {
    margin-top: var(--space-2xl);
}

.subsection-title {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.chart-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.chart-tab {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chart-tab:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.chart-tab.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: var(--space-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.improvement-callout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-lg);
    max-width: 600px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.callout-icon {
    font-size: 1.5rem;
}

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

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

/* === Video Section === */
.video-section {
    margin-top: var(--space-2xl);
    text-align: center;
}

.video-placeholder-text {
    color: var(--text-muted);
    font-style: italic;
}

/* === Academic Cards === */
.academics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.academic-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.academic-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.academic-stat {
    margin-bottom: var(--space-md);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sat-breakdown {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.psat-highlight {
    margin-top: var(--space-md);
    color: var(--text-muted);
    font-size: 0.8rem;
}

.ap-card {
    text-align: left;
}

.card-title {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.ap-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.ap-list li {
    color: var(--text-secondary);
    padding-left: var(--space-md);
    position: relative;
}

.ap-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-success);
}

/* === Projects Grid === */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.card-venue {
    color: var(--accent-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

.card-status {
    color: var(--accent-success);
    font-size: 0.85rem;
    margin-bottom: var(--space-md);
}

.card-category {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.research-card {
    grid-column: 1 / -1;
}

.research-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.research-abstract {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.research-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.keyword {
    padding: 4px 12px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--accent-primary);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill {
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--accent-secondary);
}

/* === Contact Section === */
.contact-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.contact-link:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.contact-icon {
    font-size: 1.25rem;
}

.last-updated {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* === Footer === */
.footer {
    padding: var(--space-xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* === Mobile Responsive === */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .stats-row {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .stat-item {
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        justify-content: center;
    }

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

    .trajectory-grid {
        grid-template-columns: 1fr;
    }

    .research-card {
        grid-column: 1;
    }

    .section {
        padding: var(--space-2xl) 0;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .stat-value {
        font-size: 2rem;
    }
}

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

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

.hero-content {
    animation: fadeInUp 0.6s ease-out;
}

.project-card,
.academic-card,
.trajectory-card {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.trajectory-card:nth-child(1) {
    animation-delay: 0.1s;
}

.trajectory-card:nth-child(2) {
    animation-delay: 0.2s;
}

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