/* ========================================
   GROVER ARUQUIPA - ACADEMIC PORTFOLIO
   Elegant Black, White & Gold Design
   ======================================== */

:root {
    --black: #0a0a0a;
    --dark: #141414;
    --gray-900: #1a1a1a;
    --gray-800: #262626;
    --gray-700: #3a3a3a;
    --gray-600: #525252;
    --gray-500: #6b6b6b;
    --gray-400: #8a8a8a;
    --gray-300: #a3a3a3;
    --gray-200: #d4d4d4;
    --gray-100: #f0f0f0;
    --white: #ffffff;
    --gold: #c9a227;
    --gold-light: #d4b44a;
    --gold-dark: #a8871e;
    --gold-glow: rgba(201, 162, 39, 0.15);
    --gold-border: rgba(201, 162, 39, 0.3);
    --gold-gradient: linear-gradient(135deg, #c9a227, #d4b44a, #c9a227);
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.06);
    --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), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.06);
    --shadow-gold: 0 4px 20px rgba(201, 162, 39, 0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 20px;
}

body {
    font-family: var(--font);
    font-weight: 300;
    color: var(--dark);
    background: var(--white);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ========== CONTAINERS ========== */
.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 32px;
}

.container-narrow {
    max-width: 740px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ========== SECTION DIVIDERS ========== */
.section-divider {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--gray-200) 20%,
        var(--gold-border) 50%,
        var(--gray-200) 80%,
        transparent
    );
    max-width: 200px;
    margin: 0 auto;
}

.section-divider.gold {
    background: linear-gradient(
        90deg,
        transparent,
        var(--gold-border) 30%,
        var(--gold) 50%,
        var(--gold-border) 70%,
        transparent
    );
}

/* ========== ANIMATION CLASSES ========== */
.fade-in-element {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== HEADER ========== */
.header {
    background: var(--black);
    background-image:
        radial-gradient(ellipse at 50% 0%, rgba(201, 162, 39, 0.06) 0%, transparent 60%);
    color: var(--white);
    padding: 72px 32px 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

.header-content {
    max-width: 740px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.profile-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--gray-800);
    margin: 0 auto 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    color: var(--gray-500);
    letter-spacing: 1px;
    overflow: hidden;
    position: relative;
    box-shadow:
        0 0 0 3px var(--gold),
        0 0 20px rgba(201, 162, 39, 0.2),
        0 8px 32px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.profile-photo:hover {
    transform: scale(1.05);
    box-shadow:
        0 0 0 3px var(--gold-light),
        0 0 30px rgba(201, 162, 39, 0.3),
        0 12px 40px rgba(0, 0, 0, 0.5);
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.profile-photo:hover img {
    transform: scale(1.08);
}

.header-name {
    font-size: 2.2rem;
    font-weight: 400;
    letter-spacing: 1px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--white) 60%, var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-title {
    font-size: 0.9rem;
    color: var(--gray-300);
    margin-bottom: 4px;
    font-weight: 300;
}

.header-institution {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-bottom: 4px;
}

.header-expected {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.languages {
    margin-top: 18px;
    font-size: 0.7rem;
    color: var(--gray-400);
}

.lang-level { color: var(--gray-500); }
.lang-divider { margin: 0 8px; color: var(--gray-600); }

.header-links {
    margin-top: 22px;
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.header-links a {
    font-size: 0.78rem;
    color: var(--gray-400);
    text-decoration: none;
    transition: color var(--transition-fast), transform var(--transition-fast);
    position: relative;
}

.header-links a:hover {
    color: var(--gold);
    transform: translateY(-1px);
}

.header-links a:not(.cv-link)::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width var(--transition-smooth);
}

.header-links a:not(.cv-link):hover::after {
    width: 100%;
}

.header-links .cv-link {
    padding: 7px 18px;
    border: 1px solid var(--gold);
    border-radius: var(--radius-sm);
    color: var(--gold);
    font-weight: 500;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.header-links .cv-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gold);
    transform: translateX(-101%);
    transition: transform var(--transition-smooth);
    z-index: -1;
}

.header-links .cv-link:hover {
    color: var(--black);
    border-color: var(--gold);
}

.header-links .cv-link:hover::before {
    transform: translateX(0);
}

/* ========== STATS ========== */
.stats-section {
    background: var(--gray-100);
    padding: 44px 32px;
    border-bottom: 1px solid var(--gray-200);
}

.stats-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    position: relative;
    padding: 16px 24px;
    transition: transform var(--transition-fast);
}

.stat-item:hover {
    transform: translateY(-2px);
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width var(--transition-smooth);
}

.stat-item:hover::before {
    width: 40px;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 600;
    color: var(--black);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.68rem;
    color: var(--gray-500);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 4px;
}

/* ========== SECTIONS ========== */
.section-title {
    font-size: 0.68rem;
    letter-spacing: 2.5px;
    color: var(--gold);
    margin-bottom: 32px;
    text-transform: uppercase;
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--gold-gradient);
}

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

.section-title.light { color: var(--gold-light); }

.section-subtitle {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: -18px;
    margin-bottom: 24px;
}

/* ========== STATEMENT ========== */
.statement-section {
    padding: 80px 32px;
    text-align: center;
}

.statement-main {
    font-size: 1.45rem;
    font-weight: 300;
    line-height: 1.7;
    color: var(--dark);
    max-width: 640px;
    margin: 0 auto;
}

.statement-main em {
    font-style: normal;
    color: var(--gold);
    font-weight: 500;
    position: relative;
}

.statement-main em::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gold-gradient);
    opacity: 0.5;
}

.statement-sub {
    font-size: 0.88rem;
    color: var(--gray-500);
    margin-top: 22px;
    line-height: 1.8;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== SKILLS HEXAGON ========== */
.skills-section {
    padding: 72px 32px;
    background: var(--gray-100);
    background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.03) 1px, transparent 0);
    background-size: 24px 24px;
}

.skills-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hexagon-container {
    display: flex;
    justify-content: center;
}

.hexagon-svg {
    width: 280px;
    height: 280px;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.06));
}

.hex-grid {
    fill: none;
    stroke: var(--gray-400);
    stroke-width: 0.5;
    opacity: 0.25;
    transition: opacity var(--transition-fast);
}

.hexagon-svg:hover .hex-grid {
    opacity: 0.4;
}

.hex-axis {
    stroke: var(--gray-400);
    stroke-width: 0.5;
    opacity: 0.3;
}

.skill-polygon {
    fill: var(--gold);
    fill-opacity: 0.08;
    stroke: var(--gold);
    stroke-width: 2;
    filter: drop-shadow(0 0 8px rgba(201, 162, 39, 0.2));
    transition: fill-opacity var(--transition-fast);
}

.hexagon-svg:hover .skill-polygon {
    fill-opacity: 0.12;
}

.skill-point {
    fill: var(--black);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.skill-point:hover,
.skill-point.active {
    fill: var(--gold);
    r: 9;
    filter: drop-shadow(0 0 6px rgba(201, 162, 39, 0.5));
}

.hex-label {
    font-size: 10px;
    fill: var(--gray-600);
    font-weight: 500;
    font-family: var(--font);
    transition: fill var(--transition-fast);
}

.hex-label.active {
    fill: var(--gold);
}

.skill-details {
    min-height: 180px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.skill-placeholder {
    text-align: center;
    color: var(--gray-400);
    padding-top: 32px;
}

.skill-placeholder .arrow {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.skill-placeholder p {
    font-size: 0.85rem;
    line-height: 1.5;
}

.skill-info h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.skill-tag {
    font-size: 0.72rem;
    padding: 5px 12px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.skill-bar {
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    height: 6px;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--black), var(--gold));
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-level {
    font-size: 0.7rem;
    color: var(--gray-500);
    margin-top: 6px;
}

/* ========== JOURNEY ========== */
.journey-section {
    padding: 72px 32px;
}

.journey-timeline {
    position: relative;
    padding-left: 8px;
}

.journey-item {
    display: flex;
    gap: 22px;
    padding-bottom: 32px;
    position: relative;
    transition: transform var(--transition-fast);
}

.journey-item:hover {
    transform: translateX(4px);
}

.journey-item:last-child { padding-bottom: 0; }

.journey-item::before {
    content: '';
    position: absolute;
    left: 17px;
    top: 34px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--gray-300), var(--gray-200));
}

.journey-item.current::before {
    background: linear-gradient(to bottom, var(--gold), var(--gray-300));
}

.journey-item:last-child::before { display: none; }

.journey-flag {
    width: 36px;
    flex-shrink: 0;
    padding-top: 3px;
}

.journey-flag img {
    border-radius: 3px;
    box-shadow: var(--shadow-sm);
    width: 36px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.journey-item:hover .journey-flag img {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.journey-content { flex: 1; }

.journey-year {
    font-size: 0.65rem;
    color: var(--gray-400);
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 3px;
}

.journey-item.current .journey-year {
    color: var(--gold);
    font-weight: 500;
}

.journey-content h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--black);
    margin-bottom: 2px;
}

.journey-item.current .journey-content h3 {
    color: var(--gold);
}

.journey-place {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-bottom: 5px;
}

.journey-desc {
    font-size: 0.75rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* ========== PROTOTYPES ========== */
.prototypes-section {
    padding: 72px 32px;
    background: var(--black);
    background-image:
        radial-gradient(ellipse at 30% 50%, rgba(201, 162, 39, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(201, 162, 39, 0.04) 0%, transparent 50%);
    color: var(--white);
}

.prototypes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.prototype-card {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.prototype-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(201, 162, 39, 0.05) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.prototype-card:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--gold-border);
    transform: translateY(-6px);
    box-shadow:
        0 12px 40px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(201, 162, 39, 0.1);
}

.prototype-card:hover::before {
    opacity: 1;
}

.prototype-card.main {
    border-color: var(--gold-border);
    background: rgba(201, 162, 39, 0.06);
}

.prototype-image {
    width: 100%;
    height: 120px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    color: var(--gray-600);
    letter-spacing: 1px;
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.prototype-card:hover .prototype-image {
    border-color: rgba(201, 162, 39, 0.15);
}

.prototype-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.prototype-image svg {
    color: var(--gray-600);
    opacity: 0.5;
}

.prototype-status {
    display: inline-block;
    font-size: 0.58rem;
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--gray-400);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    position: relative;
    z-index: 1;
}

.prototype-status.main {
    background: var(--gold);
    color: var(--black);
    border-color: var(--gold);
    font-weight: 500;
}

.prototype-card h3 {
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: 12px;
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
}

.prototype-card p {
    font-size: 0.7rem;
    color: var(--gray-400);
    position: relative;
    z-index: 1;
}

/* ========== PUBLICATIONS ========== */
.publications-section {
    padding: 72px 32px;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.publication-item {
    display: grid;
    grid-template-columns: 50px 1fr auto;
    gap: 16px;
    padding: 18px 16px;
    border-radius: var(--radius-sm);
    align-items: start;
    transition: background var(--transition-fast);
}

.publication-item:hover {
    background: var(--gray-100);
}

.pub-year {
    font-size: 0.78rem;
    color: var(--gold);
    font-weight: 600;
}

.pub-content h4 {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 3px;
    color: var(--black);
    font-style: italic;
}

.pub-content p {
    font-size: 0.7rem;
    color: var(--gray-500);
}

.pub-status {
    font-size: 0.58rem;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    font-weight: 500;
}

.pub-status.accepted {
    background: var(--black);
    color: var(--gold-light);
    font-weight: 600;
}

.pub-status.review {
    background: transparent;
    color: var(--gold);
    border: 1px solid var(--gold-border);
}

.pub-status.submitted {
    background: var(--gold);
    color: var(--black);
    font-weight: 600;
}

.pub-status.prep {
    background: var(--gray-100);
    color: var(--gray-500);
    border: 1px solid var(--gray-200);
}

/* ========== TUTORIALS ========== */
.tutorials-section {
    padding: 72px 32px;
    background: var(--gray-100);
    background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.03) 1px, transparent 0);
    background-size: 24px 24px;
}

.tutorial-filters {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 5px 12px;
    font-size: 0.7rem;
    border: 1px solid var(--gray-300);
    border-radius: 16px;
    cursor: pointer;
    background: var(--white);
    color: var(--gray-500);
    font-family: var(--font);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.tutorial-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 22px;
    text-decoration: none;
    color: var(--dark);
    transition: all var(--transition-smooth);
    display: block;
    position: relative;
    overflow: hidden;
}

.tutorial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gold-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-smooth);
}

.tutorial-card:hover {
    border-color: var(--gold-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

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

.tutorial-card.coming {
    opacity: 0.5;
    pointer-events: none;
}

.tutorial-card.hidden { display: none; }

.tutorial-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 10px;
}

.tutorial-card h4 {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.4;
}

.tutorial-time {
    font-size: 0.68rem;
    color: var(--gray-400);
}

/* ========== NEWS ========== */
.news-section {
    padding: 72px 32px;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-left: 24px;
}

.news-item {
    display: flex;
    gap: 18px;
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-100);
    position: relative;
    transition: all var(--transition-fast);
}

.news-item:hover {
    padding-left: 8px;
}

.news-item::before {
    content: '';
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gray-300);
    transition: all var(--transition-fast);
}

.news-item:hover::before {
    background: var(--gold);
    box-shadow: 0 0 8px rgba(201, 162, 39, 0.4);
}

.news-date {
    font-size: 0.72rem;
    color: var(--gold);
    min-width: 72px;
    font-weight: 600;
}

.news-item p {
    font-size: 0.82rem;
    color: var(--dark);
    line-height: 1.5;
}

/* ========== AWARDS ========== */
.awards-section {
    padding: 72px 32px;
    background: var(--gray-100);
    background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.03) 1px, transparent 0);
    background-size: 24px 24px;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.award-item {
    display: flex;
    gap: 14px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.award-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--gold-border);
    transform: translateY(-2px);
}

.award-year {
    font-size: 0.72rem;
    color: var(--gold);
    font-weight: 700;
    min-width: 40px;
}

.award-title {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 1px;
}

.award-org {
    font-size: 0.7rem;
    color: var(--gray-500);
}

/* ========== MENTORS ========== */
.mentors-section {
    padding: 72px 32px;
}

.mentors-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.mentor-card {
    padding: 22px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.mentor-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gold-gradient);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-smooth);
}

.mentor-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.mentor-card:hover::after {
    transform: scaleX(1);
}

.mentor-card h3 {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 3px;
    color: var(--black);
}

.mentor-title {
    font-size: 0.7rem;
    color: var(--gray-500);
}

.mentor-inst {
    font-size: 0.7rem;
    color: var(--gray-400);
    margin-bottom: 8px;
}

.mentor-role {
    font-size: 0.62rem;
    padding: 3px 10px;
    background: var(--white);
    border-radius: 20px;
    color: var(--gold);
    border: 1px solid var(--gold-border);
    font-weight: 500;
}

/* ========== VOLUNTEER ========== */
.volunteer-section {
    padding: 44px 32px;
    text-align: center;
    background: var(--gray-100);
}

.volunteer-title {
    font-size: 0.6rem;
    letter-spacing: 1.5px;
    color: var(--gray-400);
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 500;
}

.volunteer-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.volunteer-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.volunteer-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all var(--transition-smooth);
}

.volunteer-item:hover .volunteer-logo {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.1);
}

.volunteer-logo-svg {
    color: var(--gray-400);
    opacity: 0.6;
    transition: all var(--transition-smooth);
    flex-shrink: 0;
}

.volunteer-item:hover .volunteer-logo-svg {
    color: var(--gold);
    opacity: 1;
    transform: scale(1.1);
}

.volunteer-name {
    font-size: 0.8rem;
    color: var(--gray-600);
    font-weight: 500;
}

.volunteer-status {
    font-size: 0.6rem;
    color: var(--gold);
    margin-left: 4px;
}

/* ========== CONTACT ========== */
.contact-section {
    padding: 80px 32px;
    background: var(--black);
    background-image:
        radial-gradient(ellipse at 50% 100%, rgba(201, 162, 39, 0.06) 0%, transparent 50%);
    color: var(--white);
    text-align: center;
}

.contact-text {
    font-size: 0.9rem;
    color: var(--gray-400);
    margin-bottom: 28px;
    line-height: 1.7;
}

.contact-email {
    display: inline-block;
    font-size: 1.05rem;
    color: var(--gold);
    text-decoration: none;
    padding: 14px 32px;
    border: 2px solid var(--gold);
    border-radius: var(--radius-sm);
    margin-bottom: 28px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
    z-index: 1;
}

.contact-email::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gold);
    transform: translateY(101%);
    transition: transform var(--transition-smooth);
    z-index: -1;
}

.contact-email:hover {
    color: var(--black);
    border-color: var(--gold);
}

.contact-email:hover::before {
    transform: translateY(0);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.contact-links a {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-links a:hover { color: var(--gold); }

/* ========== FOOTER ========== */
.footer {
    background: var(--dark);
    padding: 24px 32px;
    text-align: center;
    border-top: 1px solid rgba(201, 162, 39, 0.1);
}

.footer p {
    font-size: 0.68rem;
    color: var(--gray-500);
    letter-spacing: 0.5px;
}

/* ========== STAGGER ANIMATIONS ========== */
.prototypes-grid .prototype-card:nth-child(1) { transition-delay: 0s; }
.prototypes-grid .prototype-card:nth-child(2) { transition-delay: 0.1s; }
.prototypes-grid .prototype-card:nth-child(3) { transition-delay: 0.2s; }
.prototypes-grid .prototype-card:nth-child(4) { transition-delay: 0.3s; }

.mentors-grid .mentor-card:nth-child(1) { transition-delay: 0s; }
.mentors-grid .mentor-card:nth-child(2) { transition-delay: 0.1s; }
.mentors-grid .mentor-card:nth-child(3) { transition-delay: 0.2s; }
.mentors-grid .mentor-card:nth-child(4) { transition-delay: 0.3s; }

/* ========== TABLET RESPONSIVE ========== */
@media (max-width: 1024px) {
    .container { max-width: 720px; }
    .container-narrow { max-width: 640px; }
    .header-content { max-width: 640px; }
}

@media (max-width: 768px) {
    .container { max-width: 100%; padding: 0 24px; }
    .container-narrow { max-width: 100%; padding: 0 24px; }
    .header-content { max-width: 100%; }

    .header { padding: 56px 24px 48px; }
    .profile-photo { width: 130px; height: 130px; }
    .header-name { font-size: 1.8rem; }

    .stats-grid { gap: 32px; }
    .stat-number { font-size: 1.8rem; }

    .skills-wrapper {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hexagon-svg { width: 260px; height: 260px; }

    .prototypes-grid { gap: 16px; }
    .tutorials-grid { gap: 12px; }
    .awards-grid { gap: 12px; }
    .mentors-grid { gap: 14px; }

    .statement-main { font-size: 1.3rem; }

    .statement-section,
    .skills-section,
    .journey-section,
    .prototypes-section,
    .publications-section,
    .tutorials-section,
    .news-section,
    .awards-section,
    .mentors-section {
        padding: 56px 24px;
    }

    .contact-section { padding: 64px 24px; }
}

/* ========== MOBILE RESPONSIVE ========== */
@media (max-width: 640px) {
    .header { padding: 48px 20px 40px; }
    .header-name { font-size: 1.5rem; letter-spacing: 0.3px; }
    .profile-photo {
        width: 120px;
        height: 120px;
        margin-bottom: 20px;
    }

    .stats-grid { gap: 24px; }
    .stat-number { font-size: 1.6rem; }

    .statement-main { font-size: 1.1rem; }

    .skills-wrapper,
    .prototypes-grid,
    .tutorials-grid,
    .awards-grid,
    .mentors-grid {
        grid-template-columns: 1fr;
    }

    .hexagon-svg { width: 220px; height: 220px; }

    .skill-details {
        min-height: auto;
        padding: 16px;
    }

    .publication-item {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 14px 12px;
    }

    .pub-status { justify-self: start; }
    .header-links { gap: 12px; }
    .volunteer-list { gap: 20px; flex-direction: column; align-items: center; }

    .contact-email {
        padding: 12px 24px;
        font-size: 0.95rem;
        display: block;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 24px;
    }

    .statement-section,
    .skills-section,
    .journey-section,
    .prototypes-section,
    .publications-section,
    .tutorials-section,
    .news-section,
    .awards-section,
    .mentors-section {
        padding: 48px 20px;
    }

    .contact-section { padding: 56px 20px; }

    .prototype-card {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .news-list {
        padding-left: 16px;
    }
}

/* ========== SMALL PHONE ========== */
@media (max-width: 380px) {
    .header-name { font-size: 1.3rem; }
    .profile-photo { width: 100px; height: 100px; }
    .stats-grid { gap: 16px; }
    .stat-number { font-size: 1.4rem; }
    .header-links { gap: 10px; }
    .header-links a { font-size: 0.7rem; }
    .statement-main { font-size: 1rem; }

    .container, .container-narrow {
        padding: 0 16px;
    }
}

/* ========== TOUCH DEVICE SAFETY ========== */
@media (hover: none) {
    .prototype-card:hover,
    .tutorial-card:hover,
    .mentor-card:hover,
    .award-item:hover,
    .journey-item:hover,
    .news-item:hover {
        transform: none;
        box-shadow: inherit;
    }
}