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

/* ==========================================================================
   DESIGN TOKENS & VARIABLES
   ========================================================================== */
:root {
    color-scheme: dark light; /* Dark mode preferred by default */
    
    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Modern Colors using light-dark() */
    --bg-main: light-dark(#f8fafc, #0b0f14);
    --bg-panel: light-dark(#ffffff, #131a22);
    --bg-nav: light-dark(rgba(248, 250, 252, 0.8), rgba(11, 15, 20, 0.8));
    
    --text-primary: light-dark(#0f172a, #f1f5f9);
    --text-secondary: light-dark(#334155, #94a3b8);
    --text-muted: light-dark(#64748b, #627284);
    
    --color-gold: light-dark(#9d7b1c, #d4af37);
    --color-gold-hover: light-dark(#806414, #e5c158);
    --color-gold-rgb: 212, 175, 55;
    
    --color-teal: light-dark(#0d9488, #2dd4bf);
    --color-teal-hover: light-dark(#0f766e, #99f6e4);
    
    --border-color: light-dark(rgba(15, 23, 42, 0.08), rgba(241, 245, 249, 0.08));
    --border-accent: light-dark(rgba(157, 123, 28, 0.2), rgba(212, 175, 55, 0.2));
    
    --shadow-soft: light-dark(0 4px 20px rgba(0,0,0,0.04), 0 4px 30px rgba(0,0,0,0.4));
    --shadow-inset: light-dark(inset 0 2px 4px rgba(0,0,0,0.02), inset 0 2px 4px rgba(255,255,255,0.02));
    
    /* Layout Constants */
    --nav-height: 80px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Force light/dark mode overrides via attribute */
[data-theme="light"] {
    color-scheme: light;
}
[data-theme="dark"] {
    color-scheme: dark;
}

/* ==========================================================================
   RESET & FOUNDATIONS
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    margin-top: 0;
    font-weight: 700;
    line-height: 1.25;
}

h1 {
    font-size: clamp(2.5rem, 1.5rem + 4vw, 4.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.8rem, 1.2rem + 2.5vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.3rem, 1.1rem + 1vw, 1.8rem);
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

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

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

ul, ol {
    margin: 0 0 1.5rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   LAYOUT LAYERS
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding-block: clamp(4rem, 2rem + 6vh, 8rem);
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--bg-nav);
    backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    height: 38px;
    width: 38px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
    transition: transform var(--transition-fast);
}

.logo:hover .logo-img {
    transform: rotate(5deg) scale(1.05);
    border-color: var(--color-gold);
}

.logo span {
    color: var(--color-gold);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold);
}

/* Lang Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    border-radius: var(--border-radius-sm);
    background-color: var(--shadow-inset);
}

.lang-btn {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.lang-btn.active {
    background-color: var(--color-gold);
    color: #000;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-gold);
    border-color: var(--color-gold);
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    gap: 0.5rem;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-gold);
    color: #0b0f14;
    border: 1px solid var(--color-gold);
}

.btn-primary:hover {
    background-color: var(--color-gold-hover);
    border-color: var(--color-gold-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.btn-text {
    padding: 0;
    background: none;
    border: none;
    color: var(--color-gold);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-text:hover {
    color: var(--color-gold-hover);
}

/* ==========================================================================
   HERO / BANNER SECTIONS
   ========================================================================== */
.hero-wrapper {
    position: relative;
    padding-top: calc(var(--nav-height) + 2rem);
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: flex;
    flex-direction: column;
}

.hero-tag {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gold);
    margin-bottom: 1rem;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.hero-title span {
    color: var(--color-gold);
    background: linear-gradient(to right, var(--color-gold), var(--color-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.hero-ctas {
    display: flex;
    gap: 1.5rem;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.portrait-frame {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-panel);
    box-shadow: var(--shadow-soft);
}

.portrait-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Background Blur Gradients */
.bg-gradient-blur {
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    z-index: 1;
    pointer-events: none;
}

.bg-blur-1 {
    top: -10%;
    right: -10%;
    background-color: var(--color-gold);
}

.bg-blur-2 {
    bottom: -10%;
    left: -10%;
    background-color: var(--color-teal);
}

/* ==========================================================================
   CARDS / STATS BLOCK
   ========================================================================== */
.stats-strip {
    background-color: var(--bg-panel);
    border-block: 1px solid var(--border-color);
    padding: 3rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 1.5rem + 2vw, 3.5rem);
    font-weight: 800;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ==========================================================================
   SECTION COMMON UI
   ========================================================================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-tag {
    font-family: var(--font-heading);
    color: var(--color-gold);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Grid & Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-accent);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    background-color: var(--border-accent);
    color: var(--color-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

/* ==========================================================================
   TIMELINE (EXPERIENCE & EDUCATION)
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: 10px;
    top: 5px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 4px solid var(--color-gold);
    z-index: 2;
    transition: background-color var(--transition-fast);
}

.timeline-item:hover .timeline-marker {
    background-color: var(--color-gold);
}

.timeline-date {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-gold);
    margin-bottom: 0.5rem;
}

.timeline-content {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
}

.timeline-title {
    margin-bottom: 0.25rem;
}

.timeline-org {
    color: var(--color-teal);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.timeline-details {
    margin-top: 1rem;
    font-size: 0.95rem;
}

/* ==========================================================================
   ACCORDION (COURSE SYLLABUS)
   ========================================================================== */
.syllabus-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.syllabus-item {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-panel);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.syllabus-item:hover {
    border-color: var(--border-accent);
}

.syllabus-trigger {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
    gap: 1rem;
}

.syllabus-trigger span:first-child {
    color: var(--color-gold);
    font-weight: 700;
    margin-inline-end: 0.5rem;
}

.syllabus-icon {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
    color: var(--text-muted);
}

.syllabus-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out;
}

.syllabus-content {
    padding: 0 2rem 2rem 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.syllabus-content ul {
    margin: 1rem 0 0 0;
}

.syllabus-item.active .syllabus-icon {
    transform: rotate(180deg);
    color: var(--color-gold);
}

.syllabus-item.active .syllabus-panel {
    max-height: 500px; /* Adjust according to content length */
}

/* Playbook table & rules */
.playbook-container {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
}

.playbook-rules {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.rules-block h4 {
    color: var(--color-gold);
    margin-bottom: 1rem;
}

.rules-block ul {
    padding-left: 1.25rem;
}

.playbook-grades {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.playbook-grades h4 {
    margin-bottom: 1rem;
}

.grades-table {
    width: 100%;
    border-collapse: collapse;
}

.grades-table th, .grades-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.grades-table th {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-gold);
}

/* ==========================================================================
   CONTACT FORM
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-method {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.contact-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--border-radius-sm);
    background-color: var(--border-accent);
    color: var(--color-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.contact-method-detail h4 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.contact-method-detail p, .contact-method-detail a {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-form-wrapper {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 3rem;
    box-shadow: var(--shadow-soft);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus-visible {
    outline: none;
    border-color: var(--color-gold);
}

.form-control:user-invalid {
    border-color: #ef4444;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2.5rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-about p {
    font-size: 0.95rem;
    max-width: 320px;
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-nav-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer-nav a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-nav a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--bg-panel);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        padding: 2rem;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-links.open {
        transform: translateX(0);
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 45px;
    }
    
    .timeline-marker {
        left: 5px;
    }
    
    .playbook-rules {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}