/**
 * Eduardo Araujo - Personal Website
 * Main Stylesheet
 *
 * Structure:
 * 1. Variables & Reset
 * 2. Base Styles
 * 3. Header & Navigation
 * 4. Hero Section
 * 5. Sections (General)
 * 6. About Section
 * 7. Areas Section
 * 8. Publications Section
 * 9. Resources Section
 * 10. Media Section
 * 11. Philosophy Section
 * 12. Contact Section
 * 13. Footer
 * 14. Animations
 * 15. Loading Screen
 * 16. Responsive Design
 */

/* ==========================================================================
   1. Variables & Reset
   ========================================================================== */

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

:root {
    --bg-dark: #0a0a0a;
    --bg-section: #141414;
    --text-primary: #f0f0f0;
    --text-secondary: #b8b8b8;
    --accent: #d4af37;
    --accent-hover: #f4cf57;
    --border: rgba(255, 255, 255, 0.08);
    --oxford-blue: #002147;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --radius-full: 50%;
}

/* ==========================================================================
   2. Base Styles
   ========================================================================== */

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* ==========================================================================
   3. Header & Navigation
   ========================================================================== */

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-normal);
}

header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--accent);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 300;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width var(--transition-normal);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 5px;
    background: none;
    border: none;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-secondary);
    transition: all var(--transition-normal);
    display: block;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    gap: 0;
    background: var(--bg-section);
    border-radius: var(--radius-md);
    padding: 0.25rem;
    border: 1px solid var(--border);
}

.lang-toggle button {
    padding: 0.4rem 0.8rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lang-toggle button:hover {
    color: var(--text-primary);
}

.lang-toggle button.active {
    background: var(--accent);
    color: var(--bg-dark);
}

/* ==========================================================================
   4. Hero Section
   ========================================================================== */

.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 4rem;
    position: relative;
    background: linear-gradient(180deg,
        #0d0d0d 0%,
        #141210 30%,
        #1a1714 50%,
        #141210 70%,
        #0d0d0d 100%);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 50% at center 20%, rgba(180, 140, 60, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    animation: fadeInUp 1s ease;
    position: relative;
    z-index: 1;
}

.profile-photo-container {
    width: 320px;
    height: 320px;
    margin: 0 auto 2.5rem;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 5px solid #c9a227;
    box-shadow:
        0 0 40px rgba(201, 162, 39, 0.35),
        0 0 80px rgba(201, 162, 39, 0.15),
        inset 0 0 20px rgba(0, 0, 0, 0.3);
    background: var(--bg-section);
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-photo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 400;
    margin-bottom: 1.25rem;
    letter-spacing: -0.5px;
    color: #f5e6c8;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: #b8b0a0;
    margin-bottom: 2.5rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.hero .credentials {
    display: none;
}

.credential-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid var(--accent);
    border-radius: 25px;
    font-size: 0.9rem;
    color: var(--accent);
    transition: all var(--transition-normal);
}

.credential-badge:hover {
    background: rgba(212, 175, 55, 0.2);
    transform: translateY(-2px);
}

/* ==========================================================================
   5. Sections (General)
   ========================================================================== */

section {
    padding: var(--spacing-xxl) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--accent);
}

/* ==========================================================================
   6. About Section
   ========================================================================== */

.about-content {
    display: grid;
    gap: var(--spacing-xl);
}

.about-text {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.highlight-quote {
    font-style: italic;
    color: var(--accent);
    font-size: 1.2rem;
    text-align: center;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    border-left: 3px solid var(--accent);
    background: rgba(212, 175, 55, 0.05);
}

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

.achievement-card {
    background: var(--bg-section);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    text-align: center;
}

.achievement-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.achievement-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.achievement-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.achievement-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   7. Areas Section
   ========================================================================== */

.areas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.area-card {
    background: var(--bg-section);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.area-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.area-card:hover::before {
    transform: translateX(0);
}

.area-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.area-card h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 400;
    font-size: 1.2rem;
}

.area-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   8. Publications Section
   ========================================================================== */

.publications-container {
    max-width: 1000px;
    margin: 0 auto;
}

.publication-year {
    margin-bottom: var(--spacing-xl);
}

.year-header {
    font-size: 1.8rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.publications-grid {
    display: grid;
    gap: var(--spacing-md);
}

.publication-card {
    background: var(--bg-section);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.publication-card:hover {
    transform: translateX(10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.publication-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.publication-info h3 {
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    font-weight: 400;
    font-size: 1.2rem;
    line-height: 1.4;
}

.publication-info .source {
    color: var(--accent);
    font-size: 0.9rem;
    font-style: italic;
}

.publication-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.publication-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.publication-card .read-more {
    color: var(--accent);
    text-decoration: none;
    font-weight: 400;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
}

.publication-card .read-more:hover {
    color: var(--accent-hover);
    gap: 0.8rem;
}

/* Pinned Publication Badge */
.publication-card.pinned {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-section) 0%, rgba(212, 175, 55, 0.05) 100%);
}

.pinned-badge {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-dark);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

/* ==========================================================================
   9. Resources Section
   ========================================================================== */

.resources {
    background: rgba(20, 20, 20, 0.5);
    padding: var(--spacing-xxl) var(--spacing-lg);
    max-width: none;
}

.resources-intro {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.resources-intro p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.resource-card {
    background: var(--bg-section);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.resource-card:hover::before {
    transform: scaleX(1);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.resource-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.resource-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 400;
    font-size: 1.3rem;
}

.resource-meta {
    color: var(--accent);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.resource-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.resource-actions {
    margin-top: auto;
}

.download-btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: var(--accent);
    color: var(--bg-dark);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition-normal);
    font-size: 0.9rem;
    width: 100%;
    text-align: center;
}

.download-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
}

/* ==========================================================================
   10. Media Section
   ========================================================================== */

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.media-card {
    background: var(--bg-section);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.media-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.media-card .type {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(212, 175, 55, 0.2);
    color: var(--accent);
    border-radius: 15px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.media-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.media-card .event-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.media-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   11. Philosophy Section
   ========================================================================== */

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.philosophy-content h3 {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
    text-align: center;
}

.philosophy-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.philosophy-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.value-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-dark);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.value-item:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.value-item .icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.value-item h4 {
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.value-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* ==========================================================================
   12. Contact Section
   ========================================================================== */

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid var(--accent);
    border-radius: 25px;
    color: var(--accent);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.contact-link:hover {
    background: var(--accent);
    color: var(--bg-dark);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--bg-dark);
    transform: translateY(-3px);
}

.hero-cta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-cta .btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    border-radius: 50px;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.hero-cta .btn-primary {
    background: linear-gradient(135deg, #c9a227 0%, #d4af37 50%, #c9a227 100%);
    color: #1a1a1a;
    border: none;
    box-shadow: 0 4px 20px rgba(201, 162, 39, 0.3);
}

.hero-cta .btn-primary:hover {
    background: linear-gradient(135deg, #d4af37 0%, #e6c547 50%, #d4af37 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(201, 162, 39, 0.4);
}

.hero-cta .btn-secondary {
    background: transparent;
    color: #c9a227;
    border: 2px solid #c9a227;
}

.hero-cta .btn-secondary:hover {
    background: rgba(201, 162, 39, 0.1);
    color: #d4af37;
    border-color: #d4af37;
    transform: translateY(-2px);
}

/* Contact Form */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.contact-info h3 {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.contact-info .contact-links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.contact-info .contact-link {
    width: 100%;
    justify-content: flex-start;
}

.contact-form-wrapper {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-group select {
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* Form Messages */
.form-message {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-size: 0.95rem;
    text-align: center;
}

.form-message-success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ==========================================================================
   13. Footer
   ========================================================================== */

footer {
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    gap: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-logo {
    font-size: 1.4rem;
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--accent);
    text-transform: uppercase;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xxl);
}

.footer-nav h4,
.footer-social h4 {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(212, 175, 55, 0.1);
    color: var(--accent);
    transition: all var(--transition-normal);
}

.social-icons a:hover {
    background: var(--accent);
    color: var(--bg-dark);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ==========================================================================
   14. Animations
   ========================================================================== */

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   15. Loading Screen
   ========================================================================== */

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent);
    color: var(--bg-dark);
    padding: 8px;
    z-index: 10000;
    transition: top var(--transition-normal);
}

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

/* ==========================================================================
   16. Responsive Design
   ========================================================================== */

/* Tablets */
@media (max-width: 992px) {
    .nav-links {
        gap: 1.5rem;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    /* Navigation */
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-dark);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        border-bottom: 1px solid var(--border);
        overflow-y: auto;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    /* Language Toggle Mobile */
    .lang-toggle {
        position: absolute;
        right: 60px;
        top: 50%;
        transform: translateY(-50%);
    }

    .lang-toggle button {
        padding: 0.3rem 0.6rem;
        font-size: 0.7rem;
    }

    /* Hero */
    .hero {
        padding: 5rem 1.5rem 3rem;
        min-height: 80vh;
    }

    .hero::after {
        width: 400px;
        height: 300px;
    }

    .hero h1 {
        font-size: 2.5rem;
        color: #f5e6c8;
    }

    .hero .subtitle {
        font-size: 1rem;
        color: #b8b0a0;
        letter-spacing: 0.5px;
    }

    .profile-photo-container {
        width: 260px;
        height: 260px;
        margin-bottom: 2rem;
        border-width: 4px;
    }

    .hero-cta .btn {
        padding: 0.875rem 2rem;
        font-size: 0.95rem;
    }

    /* Sections */
    section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-lg);
    }

    /* Grids - Stack on mobile */
    .areas-grid,
    .achievements,
    .media-grid,
    .highlights-grid,
    .resources-grid,
    .philosophy-values {
        grid-template-columns: 1fr;
    }

    /* Cards */
    .about-text,
    .philosophy-content,
    .contact-info,
    .highlights-section {
        padding: var(--spacing-lg);
    }

    /* Publications */
    .publication-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .publication-card:hover {
        transform: translateX(5px);
    }

    /* Contact */
    .contact-container {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

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

    /* Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

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

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-lg);
        width: 100%;
    }

    .footer-nav,
    .footer-social {
        text-align: center;
    }

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

    /* Hero CTA */
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 250px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    nav {
        padding: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .hero {
        min-height: 75vh;
        padding: 4rem 1rem 2rem;
    }

    .hero::after {
        width: 300px;
        height: 200px;
    }

    .hero h1 {
        font-size: 2rem;
        color: #f5e6c8;
    }

    .hero .subtitle {
        font-size: 0.9rem;
        color: #b8b0a0;
        letter-spacing: 0.3px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .profile-photo-container {
        width: 200px;
        height: 200px;
        margin-bottom: 1.5rem;
        border-width: 3px;
    }

    .hero-cta {
        gap: 1rem;
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        padding: 0.875rem 2rem;
        font-size: 0.9rem;
        width: 100%;
        max-width: 220px;
    }
}

/* Print styles */
@media print {
    .loading,
    .mobile-menu-toggle,
    header {
        display: none !important;
    }

    section {
        opacity: 1;
        transform: none;
        page-break-inside: avoid;
    }

    body {
        background: white;
        color: black;
    }

    a {
        text-decoration: underline;
    }
}

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

    html {
        scroll-behavior: auto;
    }
}