/* ============================================
   PROFESSIONAL DESIGN SYSTEM
   ============================================ */

:root {
    /* Colors - Professional Palette */
    --color-primary: #1a1a2e;
    --color-secondary: #4a5568;
    --color-accent: #1e3a5f;
    --color-accent-light: #3b82f6;
    --color-accent-warm: #c9a227;
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-alt: #edf2f7;
    --color-border: #e2e8f0;
    --color-text: #2d3748;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    
    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Typography */
    --font-display: ui-serif, Georgia, "Times New Roman", serif;
    --font-body: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    /* Layout */
    --max-width: 1200px;
    --max-width-content: 900px;
    --border-radius: 10px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

/* Scroll-reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* ============================================
   RESET & BASE
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
    position: relative;
    padding-bottom: var(--space-xs);
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent-warm));
    border-radius: 2px;
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

h4 {
    font-size: 1.25rem;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

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

.lead {
    font-size: 1.2rem;
    line-height: 1.85;
    color: var(--color-text-light);
    font-weight: 400;
    letter-spacing: 0.005em;
}

/* ============================================
   LAYOUT
   ============================================ */

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

.container-narrow {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    background: rgba(255, 255, 255, 0.97);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.site-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.site-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.site-title a:hover {
    color: var(--color-accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    align-items: center;
}

.nav-list a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-xs) 0;
    position: relative;
    transition: var(--transition);
}

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

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

.nav-list a:hover,
.nav-list a.active {
    color: var(--color-accent);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(160deg, #f0f4f8 0%, #e8eef5 40%, #f8fafc 100%);
    padding: var(--space-3xl) 0 var(--space-2xl);
    border-bottom: none;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(30, 58, 95, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--space-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-image {
    position: relative;
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    opacity: 0.15;
    animation: float 6s ease-in-out infinite;
}

.hero-image img {
    width: 260px;
    height: 260px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--color-bg);
    box-shadow: 0 12px 40px rgba(30, 58, 95, 0.18);
    position: relative;
    z-index: 1;
    transition: transform 0.4s ease;
}

.hero-image img:hover {
    transform: scale(1.03);
}

.hero-text h1 {
    margin-top: 0;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.03em;
}

.hero-text .subtitle {
    font-size: 1.35rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

/* ============================================
   ACHIEVEMENTS HIGHLIGHTS
   ============================================ */

.achievements {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-light);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.achievement-card {
    background: var(--color-bg);
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border-left: none;
    border-top: 3px solid transparent;
    background-image: linear-gradient(var(--color-bg), var(--color-bg)),
                      linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    background-origin: padding-box, border-box;
    background-clip: padding-box, border-box;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.achievement-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, transparent 50%, rgba(30, 58, 95, 0.03) 50%);
    pointer-events: none;
}

.achievement-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.achievement-card .number {
    font-size: 3.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-sm);
    font-family: var(--font-display);
}

.achievement-card .label {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.achievement-card .description {
    margin-top: var(--space-sm);
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */

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

.timeline {
    position: relative;
    padding-left: var(--space-xl);
    margin-top: var(--space-xl);
}

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

.timeline-item {
    position: relative;
    margin-bottom: var(--space-xl);
    padding-left: var(--space-xl);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -9px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item h3 {
    margin-top: 0;
    color: var(--color-accent);
    font-size: 1.5rem;
}

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.timeline-meta .organization {
    font-weight: 600;
    color: var(--color-text);
}

.timeline-meta .location {
    color: var(--color-text-light);
}

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

.timeline-content {
    background: var(--color-bg-light);
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-accent);
    transition: var(--transition);
}

.timeline-item:hover .timeline-content {
    border-left-color: var(--color-accent-light);
    box-shadow: var(--shadow-sm);
}

.timeline-content ul {
    margin-left: var(--space-lg);
    margin-top: var(--space-md);
}

.timeline-content li {
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

/* ============================================
   PUBLICATIONS
   ============================================ */

.publications-section {
    padding: var(--space-xl) 0;
    background: var(--color-bg-light);
}

.publication-card {
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-md);
    border-left: 4px solid var(--color-accent);
    transition: var(--transition);
}

.publication-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.publication-card cite {
    font-style: normal;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: var(--space-xs);
}

.publication-meta {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

.publication-links {
    margin-top: var(--space-sm);
}

.publication-links a {
    display: inline-block;
    margin-right: var(--space-md);
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.publication-links a:hover {
    color: var(--color-accent-light);
    text-decoration: underline;
}

/* ============================================
   MODERN COURSE PAGE DESIGN
   ============================================ */

/* Course Hero Section */
.course-hero {
    background: linear-gradient(135deg, #0b1929 0%, var(--color-accent) 40%, var(--color-accent-light) 100%);
    color: white;
    padding: var(--space-3xl) 0;
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.course-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 60% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.course-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.course-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    letter-spacing: 0.5px;
}

.course-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.course-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    margin-bottom: var(--space-xs);
    opacity: 0.95;
}

.course-meta {
    font-size: 1rem;
    margin-bottom: var(--space-xl);
    opacity: 0.9;
}

.course-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-course-download {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.75rem;
    background: white;
    color: var(--color-accent);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-course-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    background: var(--color-bg-light);
}

/* Course Overview Grid */
.course-overview {
    padding: var(--space-2xl) 0;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.overview-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.overview-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.overview-card h3 {
    color: var(--color-accent);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.overview-card p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.overview-card p:last-child {
    margin-bottom: 0;
}

/* Learning Objectives */
.course-objectives {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-light);
}

.section-heading {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.objective-item {
    display: flex;
    gap: var(--space-md);
    background: white;
    padding: var(--space-lg);
    border-radius: 10px;
    border-left: 4px solid var(--color-accent);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.objective-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.objective-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.objective-text {
    flex: 1;
    line-height: 1.6;
    color: var(--color-text);
}

/* Course Structure Section */
.course-structure {
    padding: var(--space-2xl) 0;
}

.structure-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

/* Modern Interactive Slider */
.slider-modern {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.slider-track {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    background: var(--color-bg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    min-height: 500px;
}

/* Top Navigation */
.slider-top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-xl);
    background: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    z-index: 10;
}

.slider-nav-btn-top {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(44, 82, 130, 0.2);
}

.slider-nav-btn-top:hover:not(:disabled) {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 82, 130, 0.3);
}

.slider-nav-btn-top:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.slider-nav-btn-top svg {
    flex-shrink: 0;
}

.slide-modern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: translateX(50px) scale(0.95);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.slide-modern.active {
    opacity: 1;
    transform: translateX(0) scale(1);
    position: relative;
    pointer-events: auto;
}

.slide-modern-inner {
    padding: var(--space-2xl);
}

.slide-number-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    box-shadow: 0 4px 12px rgba(44, 82, 130, 0.3);
}

.slide-modern-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
    line-height: 1.3;
}

.slide-modern-content {
    line-height: 1.8;
}

.slide-intro-text {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-bg-light);
    border-left: 4px solid var(--color-accent);
    border-radius: 4px;
}

.slide-modern-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.slide-modern-content li {
    padding: var(--space-sm) 0 var(--space-sm) var(--space-xl);
    position: relative;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    transition: var(--transition);
}

.slide-modern-content li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2rem;
}

.slide-modern-content li:hover {
    color: var(--color-accent);
    padding-left: calc(var(--space-xl) + 4px);
}

/* Modern Slider Controls */
.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    padding: var(--space-lg);
}

.slider-nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
    background: white;
    color: var(--color-accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.slider-nav-btn:hover:not(:disabled) {
    background: var(--color-accent);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(44, 82, 130, 0.3);
}

.slider-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.slider-indicators {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    position: relative;
}

.indicator::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--color-accent);
    transition: all 0.3s ease;
}

.indicator:hover {
    transform: scale(1.2);
    border-color: var(--color-accent-light);
}

.indicator.active {
    background: var(--color-accent);
    width: 14px;
    height: 14px;
    box-shadow: 0 0 0 4px rgba(44, 82, 130, 0.2);
}

.indicator.active::after {
    width: 6px;
    height: 6px;
    background: white;
}

/* Reading List Section */
.course-reading {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-light);
}

.reading-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.reading-category {
    display: flex;
    flex-direction: column;
}

.reading-category h4 {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-accent);
}

.reading-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.reading-item-modern {
    background: white;
    padding: var(--space-lg);
    border-radius: 10px;
    border-left: 4px solid var(--color-accent);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.reading-item-modern:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.reading-item-modern cite {
    font-style: normal;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: var(--space-xs);
}

.reading-meta {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
    line-height: 1.6;
}

.reading-link {
    display: inline-block;
    color: var(--color-accent);
    font-weight: 600;
    text-decoration: none;
    margin-top: var(--space-xs);
    transition: var(--transition);
}

.reading-link:hover {
    color: var(--color-accent-light);
    transform: translateX(4px);
}

/* Additional Resources */
.course-resources {
    padding: var(--space-2xl) 0;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.resource-card {
    background: white;
    padding: var(--space-lg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.resource-card h4 {
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.resource-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .course-hero {
        padding: var(--space-xl) 0;
    }
    
    .course-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-course-download {
        width: 100%;
        justify-content: center;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .objectives-grid {
        grid-template-columns: 1fr;
    }
    
    .slider-track {
        min-height: 400px;
    }
    
    .slide-modern-inner {
        padding: var(--space-lg);
    }
    
    .slider-top-nav {
        padding: var(--space-sm) var(--space-md);
    }
    
    .slider-nav-btn-top {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .slider-nav-btn-top span {
        display: none;
    }
    
    .slider-nav-btn-top svg {
        width: 18px;
        height: 18px;
    }
    
    .reading-grid {
        grid-template-columns: 1fr;
    }

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

    .explore-grid {
        grid-template-columns: 1fr;
    }
    
    .slider-controls {
        flex-wrap: wrap;
        gap: var(--space-md);
    }
}

/* ============================================
   BUTTONS & LINKS
   ============================================ */

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

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

.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), #2a4a7f);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2a4a7f, var(--color-accent-light));
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(30, 58, 95, 0.25);
}

.btn-secondary {
    background: transparent;
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(30, 58, 95, 0.2);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background: linear-gradient(135deg, #0f1b2d 0%, var(--color-primary) 50%, #162341 100%);
    color: white;
    padding: var(--space-2xl) 0;
    margin-top: var(--space-3xl);
    text-align: center;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent-warm), var(--color-accent-light), var(--color-accent));
}

.disclaimer {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
    margin-bottom: var(--space-sm);
}

.copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(30, 58, 95, 0.3);
    opacity: 0;
    transform: translateY(20px) scale(0.8);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    pointer-events: none;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 8px 24px rgba(30, 58, 95, 0.4);
}

.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* ============================================
   EXPLORE SECTION CARDS
   ============================================ */

.explore-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.explore-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    border-radius: 14px;
    text-decoration: none;
    color: white;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
}

.explore-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: inherit;
    transition: opacity 0.4s ease;
}

.explore-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    pointer-events: none;
}

.explore-card--profile {
    background: linear-gradient(135deg, #1e3a5f 0%, #2a5298 100%);
}

.explore-card--portfolio {
    background: linear-gradient(135deg, #0f2440 0%, #1a365d 100%);
}

.explore-card--map {
    background: linear-gradient(135deg, #1a3a4a 0%, #2a6f6f 100%);
}

.explore-card--course {
    background: linear-gradient(135deg, #1a1a2e 0%, #2c5282 100%);
}

.explore-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.explore-card:hover {
    color: white;
}

.explore-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.explore-card-icon svg {
    width: 26px;
    height: 26px;
    color: white;
}

.explore-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    position: relative;
    z-index: 1;
    font-family: var(--font-display);
}

.explore-card-desc {
    font-size: 0.9rem;
    opacity: 0.85;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.explore-card-arrow {
    margin-top: var(--space-md);
    opacity: 0;
    transform: translateY(8px);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.explore-card:hover .explore-card-arrow {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   UTILITIES
   ============================================ */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: white;
    padding: var(--space-sm);
    text-decoration: none;
    z-index: 1000;
}

.skip-link:focus {
    top: 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        right: 0;
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius: var(--border-radius);
        flex-direction: column;
        padding: var(--space-md);
        min-width: 200px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        margin: 0 auto;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        padding-left: var(--space-lg);
    }
    
    .timeline-item {
        padding-left: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}

/* ============================================
   PORTFOLIO PAGE
   ============================================ */

/* Hero */
.portfolio-hero {
    background: linear-gradient(135deg, #0b1929 0%, #152a4a 40%, var(--color-accent) 100%);
    padding: var(--space-3xl) 0 var(--space-2xl);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.portfolio-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(201, 162, 39, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.portfolio-hero-title {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    color: white;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.03em;
}

.portfolio-hero-lead {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Section Nav */
.portfolio-nav {
    position: sticky;
    top: 64px;
    z-index: 900;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.portfolio-nav-list {
    display: flex;
    gap: 0.5rem;
    padding: 0.65rem 0;
    list-style: none;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.portfolio-nav-link {
    font-size: 0.85rem;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-light);
    color: var(--color-text-light);
    text-decoration: none;
    white-space: nowrap;
    transition: var(--transition);
}

.portfolio-nav-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.portfolio-nav-link.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* Sections */
.pf-section {
    padding: var(--space-3xl) 0;
}

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

.pf-tag {
    display: inline-block;
    background: var(--color-accent);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.pf-section > .container > h2 {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.pf-intro {
    text-align: center;
    max-width: 740px;
    margin: 0 auto var(--space-2xl);
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.75;
}

/* Card Grid */
.pf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--space-lg);
}

.pf-card {
    background: var(--color-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.pf-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.pf-card--wide {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.pf-card--accent {
    border-left: 4px solid #d69e2e;
    background: linear-gradient(135deg, #fffff0, var(--color-bg));
}

.pf-card-img img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
    display: block;
}

.pf-card-body {
    padding: var(--space-lg) var(--space-xl);
}

.pf-label {
    display: inline-block;
    background: var(--color-bg-alt);
    color: var(--color-accent);
    padding: 0.2rem 0.7rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: var(--space-sm);
}

.pf-label--gold {
    background: #fefcbf;
    color: #975a16;
}

.pf-card-body h3 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: var(--space-xs);
    line-height: 1.35;
}

.pf-card-body p {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-text);
}

.pf-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-xs);
}

.pf-card-body > a,
.pf-links a {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-accent);
}

.pf-card-body > a:hover,
.pf-links a:hover {
    color: var(--color-accent-light);
}

/* Gallery */
.pf-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.pf-gallery-item {
    border-radius: 10px;
    overflow: hidden;
    background: var(--color-bg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.pf-gallery-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.pf-gallery-item--span {
    grid-column: 1 / -1;
}

.pf-gallery-item img {
    width: 100%;
    display: block;
    max-height: 420px;
    object-fit: cover;
    object-position: top;
}

.pf-gallery-item.pf-gallery-item--contain img {
    max-height: none;
    object-fit: contain;
    object-position: center;
}

.pf-gallery-item.pf-gallery-item--crop-top img {
    max-height: 340px;
    object-position: bottom;
}

.pf-gallery-item figcaption {
    padding: var(--space-md) var(--space-lg);
}

.pf-gallery-item figcaption strong {
    display: block;
    font-size: 1.05rem;
    color: var(--color-accent);
    margin-bottom: 0.3rem;
}

.pf-gallery-item figcaption p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    line-height: 1.65;
    margin: 0;
}

/* Aside / Links Box */
.pf-aside {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg-light);
    border-radius: 10px;
    border-left: 3px solid var(--color-accent);
}

.pf-aside h4 {
    color: var(--color-accent);
    margin: 0 0 var(--space-sm);
}

.pf-aside ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.pf-aside li { margin-bottom: var(--space-xs); }

.pf-aside a {
    font-weight: 500;
    font-size: 0.92rem;
}

/* Sub-sections within a portfolio section */
.pf-sub-section {
    margin-top: var(--space-xxl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.pf-sub-heading {
    font-size: 1.5rem;
    color: var(--color-heading);
    margin: 0 0 var(--space-sm);
}

.pf-sub-section .pf-intro {
    margin-bottom: var(--space-lg);
}

/* Reports */
.pf-reports {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: var(--space-lg);
}

.pf-report {
    background: var(--color-bg);
    padding: var(--space-lg);
    border-radius: 10px;
    border-left: 3px solid var(--color-accent);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.pf-report:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(3px);
}

.pf-report h4 {
    font-size: 1.05rem;
    color: var(--color-primary);
    margin: 0 0 var(--space-xs);
}

.pf-report p {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

.pf-report a,
.pf-report .pf-links a {
    font-size: 0.88rem;
    font-weight: 600;
}

/* Media Grid */
.pf-media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
}

.pf-media-item {
    display: block;
    padding: var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition);
}

.pf-media-item:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: var(--color-text);
}

.pf-media-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: white;
    background: var(--color-accent);
    padding: 0.15rem 0.55rem;
    border-radius: 3px;
    margin-bottom: var(--space-sm);
}

.pf-media-item h4 {
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--color-primary);
    margin: 0 0 0.3rem;
    line-height: 1.4;
}

.pf-media-item p {
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.55;
}

/* Academy */
.academy {
    max-width: 960px;
    margin: 0 auto;
}

.academy-hero {
    background: linear-gradient(135deg, #0f2440, var(--color-accent));
    color: white;
    padding: var(--space-2xl);
    border-radius: 12px;
    margin-bottom: var(--space-xl);
}

.academy-hero h3 {
    color: white;
    font-size: 1.4rem;
    margin-top: 0;
}

.academy-hero p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 1rem;
    line-height: 1.75;
    margin: 0;
}

.academy-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.academy-detail {
    background: var(--color-bg);
    padding: var(--space-lg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
}

.academy-detail h4 {
    color: var(--color-accent);
    margin: 0 0 var(--space-sm);
    font-size: 1.05rem;
}

.academy-detail p {
    font-size: 0.92rem;
    line-height: 1.65;
}

.academy-detail ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.academy-detail li {
    padding: 0.35rem 0 0.35rem 1.2rem;
    position: relative;
    font-size: 0.92rem;
}

.academy-detail li::before {
    content: "\2192";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.academy-modules {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: 10px;
    border: 1px solid var(--color-border);
}

.academy-modules h4 {
    color: var(--color-accent);
    margin: 0 0 var(--space-md);
    text-align: center;
    font-size: 1.15rem;
}

.academy-module-list {
    padding: 0;
    margin: 0;
    counter-reset: module;
    list-style: none;
}

.academy-module-list li {
    counter-increment: module;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 0.75rem var(--space-md);
    background: var(--color-bg-light);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    font-size: 0.92rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.academy-module-list li:hover {
    border-left-color: var(--color-accent);
    background: var(--color-bg-alt);
}

.academy-module-list li::before {
    content: counter(module, decimal-leading-zero);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.78rem;
}

/* Portfolio Responsive */
@media (max-width: 768px) {
    .portfolio-hero { padding: var(--space-2xl) 0 var(--space-xl); }
    .portfolio-nav { top: 56px; }
    .portfolio-nav-list { flex-wrap: nowrap; }
    .pf-grid { grid-template-columns: 1fr; }
    .pf-card--wide { grid-template-columns: 1fr; }
    .pf-gallery { grid-template-columns: 1fr; }
    .pf-reports { grid-template-columns: 1fr; }
    .pf-media-grid { grid-template-columns: 1fr; }
    .academy-details { grid-template-columns: 1fr; }
    .pf-card-body { padding: var(--space-md); }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .site-header,
    .site-footer,
    .menu-toggle,
    .skip-link,
    .btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    .timeline-item {
        page-break-inside: avoid;
    }
}

/* ============================================
   PROFILE SECTION NAV
   ============================================ */

.profile-section-nav {
    position: sticky;
    top: 64px; /* below main header */
    z-index: 900;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.profile-section-nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    list-style: none;
}

.profile-section-link {
    font-size: 0.9rem;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-light);
    color: var(--color-text-light);
    text-decoration: none;
    white-space: nowrap;
    transition: var(--transition);
}

.profile-section-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-bg);
}

.profile-section-link.active {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: #fff;
}

@media (max-width: 768px) {
    .profile-section-nav {
        top: 56px;
        overflow-x: auto;
    }

    .profile-section-nav-list {
        flex-wrap: nowrap;
    }
}

/* ============================================
   CAREER MAP
   ============================================ */

#career-map-container {
    position: relative;
}

#career-map-container .leaflet-popup-content-wrapper {
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

#career-map-container .custom-marker {
    background: transparent;
    border: none;
}

/* Map legend styling */
.leaflet-control {
    z-index: 400;
}

@media (min-width: 769px) and (max-width: 1023px) {
    .achievements-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .achievements-grid .achievement-card {
        grid-column: span 2;
    }

    .achievements-grid .achievement-card:nth-child(4) {
        grid-column: 2 / span 2;
    }
}

@media (min-width: 1024px) {
    .achievements-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .achievements-grid .achievement-card {
        padding: var(--space-lg) var(--space-md);
    }

    .achievements-grid .achievement-card .number {
        font-size: 2.75rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

*:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}