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

:root {
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --accent: #00ffcc;
    --accent-glow: rgba(0, 255, 204, 0.25);
    --accent-hover: #00e6b8;
    --text: #e8e8e8;
    --text-muted: #9ca3af;
    --border: rgba(255, 255, 255, 0.08);
    --font-primary: 'Inter', -apple-system, sans-serif;
    --font-heading: 'Poppins', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { 
    background: var(--bg); 
    color: var(--text); 
    font-family: var(--font-primary); 
    margin: 0;
    overflow-x: hidden;
    font-size: 16px;
    line-height: 1.6;
}

.full-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 6% 80px;
    position: relative;
}

/* ========== NAVBAR - Glass Morphism ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}
.navbar.scrolled { background: rgba(10, 10, 15, 0.9); }
.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 6%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}
.nav-links { margin-left: auto; }
.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--accent);
    letter-spacing: 4px;
    text-decoration: none;
    transition: color 0.3s, transform 0.3s;
}
.logo:hover { color: var(--accent-hover); transform: scale(1.02); }
.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
    margin: 0;
    padding: 0;
}
.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s, transform 0.3s;
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }
.nav-social {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-left: 8px;
    padding-left: 24px;
    border-left: 1px solid var(--border);
}
.nav-social .nav-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1rem;
    transition: all 0.35s;
}
.nav-social .nav-icon::after { display: none; }
.nav-social .nav-icon:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px var(--accent-glow);
}
.nav-icon-hf .hf-emoji,
.social-icon-hf .hf-emoji,
.footer-icon-hf .hf-emoji {
    font-size: 1.1em;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.nav-social .nav-icon-hf:hover,
.social-icon.social-icon-hf:hover,
.footer-social .footer-icon-hf:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 15px var(--accent-glow);
}
.nav-lang {
    position: absolute;
    top: 50%;
    right: 6%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 10;
}
.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: color 0.3s, background 0.3s;
}
.lang-btn:hover {
    color: var(--text);
}
.lang-btn.active {
    color: var(--accent);
    background: rgba(0, 255, 204, 0.1);
}
.lang-sep {
    color: var(--border);
    font-size: 0.8rem;
    user-select: none;
}
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
}

/* ========== HERO ========== */
.hero-section { background: linear-gradient(180deg, var(--bg) 0%, #0d1117 50%, var(--bg) 100%); }
.hero-container { text-align: center; max-width: 600px; }
.profile-frame {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--accent), #00a896, transparent);
    margin: 0 auto 28px;
    box-shadow: 0 0 50px var(--accent-glow);
    animation: profileGlow 3s ease-in-out infinite alternate;
}
@keyframes profileGlow {
    from { box-shadow: 0 0 35px var(--accent-glow); }
    to { box-shadow: 0 0 60px var(--accent-glow); }
}
.profile-frame img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}
.hero-container h1,
.hero-name {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 3px;
    position: relative;
}
.hero-name {
    background: linear-gradient(90deg, var(--text) 0%, var(--text) 35%, var(--accent) 50%, var(--text) 65%, var(--text) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 12px rgba(0, 255, 204, 0.3));
    animation: nameGlow 4s ease-in-out infinite;
}
@keyframes nameGlow {
    0%, 100% { background-position: 200% 50%; }
    50% { background-position: 0% 50%; }
}
.typewriter-text {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 16px;
    min-height: 1.6em;
}
.hero-intro {
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 20px auto 0;
    max-width: 520px;
    text-align: center;
}
.hero-social {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 28px;
}
.social-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    font-size: 1.25rem;
    transition: all 0.35s;
}
.social-icon:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-6px);
    box-shadow: 0 8px 25px var(--accent-glow);
}
/* ========== SECTIONS ========== */
h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--accent);
    margin: 0 0 48px;
    text-transform: uppercase;
    letter-spacing: 4px;
    font-weight: 600;
}
.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin: -32px 0 40px;
}

/* ========== PROJECT CARDS ========== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    width: 100%;
    max-width: 1100px;
}
.card {
    background: var(--bg-card);
    padding: 36px 32px;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: all 0.4s;
    text-align: center;
    cursor: pointer;
    position: relative;
}
.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35), 0 0 30px var(--accent-glow);
}
.project-card:active { transform: translateY(-6px); }
.card-icon {
    font-size: 2.75rem;
    color: var(--accent);
    margin-bottom: 20px;
}
.card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 12px;
}
.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0 0 20px;
    line-height: 1.6;
}
.card-footer-icons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin: 16px 0;
    color: var(--accent);
    font-size: 1.25rem;
    opacity: 0.9;
}
.card-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent);
    transition: gap 0.3s;
}
.project-card:hover .card-cta { gap: 12px; }

/* ========== R&D SECTION ========== */
.research-section { background: linear-gradient(180deg, var(--bg) 0%, #0d0f14 100%); }
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    width: 100%;
    max-width: 1100px;
}
.research-card {
    background: var(--bg-card);
    padding: 40px 36px;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}
.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, var(--accent), transparent);
    transition: height 0.4s;
}
.research-card:hover {
    border-color: var(--accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.research-card:hover::before { height: 100%; }
.kaggle-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    margin-bottom: 40px;
    background: rgba(0, 255, 204, 0.06);
    border: 1px solid rgba(0, 255, 204, 0.25);
    border-radius: 12px;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.35s;
}
.kaggle-badge:hover {
    background: rgba(0, 255, 204, 0.12);
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--accent-glow);
}
.kaggle-badge i { font-size: 1.3rem; }
.research-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 20px;
    opacity: 0.9;
}
.research-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0 0 12px;
}
.research-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.65;
}

/* ========== CERTIFICATES ========== */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 1100px;
}
.cert-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all 0.35s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.cert-item:hover {
    border-color: var(--accent);
    transform: scale(1.03);
    box-shadow: 0 12px 30px var(--accent-glow);
}
.cert-item:active { transform: scale(1.01); }
.cert-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s;
}
.cert-item:hover img { transform: scale(1.05); }
.cert-item .overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s;
}
.cert-item .overlay i { font-size: 2rem; color: var(--accent); }
.cert-item:hover .overlay { opacity: 1; }
.cert-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
}
/* ========== TECHNOLOGIES ========== */
.tech-section { padding: 100px 6% 80px; }
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 900px;
    margin-top: 48px;
}
.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.35s;
}
.tech-item i {
    font-size: 2.25rem;
    color: var(--text-muted);
    transition: all 0.35s;
}
.tech-item span {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    transition: color 0.35s;
}
.tech-item:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px var(--accent-glow);
}
.tech-item:hover i,
.tech-item:hover span {
    color: var(--accent);
}

.cert-pdf .cert-pdf-thumbnail {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s;
}
.cert-pdf .cert-pdf-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.cert-pdf.has-thumbnail .cert-pdf-thumbnail { opacity: 1; }
.cert-pdf.has-thumbnail .pdf-icon { display: none; }
.cert-pdf .pdf-icon {
    font-size: 3.5rem;
    color: #e53935;
    margin-bottom: 12px;
    transition: opacity 0.3s;
}
.cert-pdf.show-pdf-icon .cert-pdf-thumbnail { display: none; }
.cert-item.cert-error .cert-pdf-thumbnail { display: none; }
.cert-pdf .cert-name { position: relative; background: none; padding: 8px; }

/* ========== CONTACT ========== */
.contact-section { padding-bottom: 120px; }
.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    max-width: 600px;
}
.contact-info {
    text-align: center;
}
.contact-item {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1rem;
    margin-bottom: 12px;
    transition: color 0.3s;
}
a.contact-item:hover { color: var(--accent); }
.contact-item i {
    margin-right: 10px;
    color: var(--accent);
    width: 20px;
}
.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.35s;
}
.contact-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px var(--accent-glow);
}
.contact-btn:active { transform: translateY(-2px); }
.contact-btn i,
.contact-btn .hf-emoji { font-size: 1.2rem; }

/* ========== FOOTER ========== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 40px 6%;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}
.footer-info p { margin: 0 0 4px; font-size: 0.95rem; color: var(--text-muted); }
.footer-school { font-size: 0.85rem !important; opacity: 0.8; }
.footer-link,
.footer-kaggle {
    display: inline-block;
    margin-top: 8px;
    margin-right: 16px;
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-info > a:first-of-type { margin-top: 12px; }
.footer-link:hover,
.footer-kaggle:hover { color: var(--accent-hover); }
.footer-social {
    display: flex;
    gap: 20px;
}
.footer-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.35s;
}
.footer-social a:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

/* ========== PROJECT MODAL ========== */
.project-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9998;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.project-modal.active { display: flex; }
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    cursor: pointer;
}
.modal-dialog {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    max-width: 680px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
    animation: modalIn 0.35s ease-out;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(-20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    color: var(--text);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s;
}
.modal-close:hover {
    background: var(--accent);
    color: var(--bg);
}
.modal-body {
    padding: 48px 24px 40px;
}
.modal-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin: 0 0 8px;
    color: var(--accent);
    text-transform: none;
}
.modal-role {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0 0 24px;
    font-weight: 500;
}
.modal-mentors {
    color: var(--text);
    font-size: 0.95rem;
    margin: 0 0 12px;
    line-height: 1.5;
}
.modal-mentors strong { color: var(--accent); }
.modal-team {
    width: 100%;
    margin-bottom: 24px;
    background: #0d0d0d;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 16px;
    overflow: visible;
}
.modal-gallery-wrap { padding: 0; text-align: center; }
.modal-gallery-label {
    display: block;
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 500;
    text-align: center;
}
.modal-gallery {
    display: flex;
    overflow-x: auto;
    padding: 12px 8px 24px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    background: #0d0d0d;
    border-radius: 12px;
    gap: 0;
    scrollbar-color: var(--accent) rgba(255,255,255,0.06);
    scrollbar-width: thin;
}
.modal-gallery::-webkit-scrollbar {
    height: 10px;
    margin-top: 8px;
}
.modal-gallery::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.06);
    border-radius: 5px;
}
.modal-gallery::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 5px;
    box-shadow: 0 0 10px var(--accent-glow);
}
.modal-gallery::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 15px var(--accent-glow);
}
.modal-gallery-item {
    flex: 0 0 100%;
    width: 100%;
    min-width: 100%;
    min-height: 400px;
    border-radius: 10px;
    overflow: visible;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    box-sizing: border-box;
}
.modal-gallery-item img {
    max-width: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    display: block;
    vertical-align: middle;
}
.modal-team img,
.modal-team-img {
    max-width: 100%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}
.team-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1rem;
}
.team-placeholder i { margin-right: 8px; font-size: 1.5rem; }
.modal-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}
.modal-tech span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    font-size: 0.9rem;
    border: 1px solid var(--border);
}
.modal-tech span {
    border-color: rgba(0, 255, 204, 0.25);
    color: var(--text);
}
.modal-tech span i { color: var(--accent); }
.modal-team-gratitude {
    margin-bottom: 24px;
    padding: 20px;
    background: rgba(0, 255, 204, 0.05);
    border: 1px solid rgba(0, 255, 204, 0.15);
    border-radius: 12px;
}
.modal-section-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--accent);
    margin: 0 0 12px;
    font-weight: 600;
}
.modal-team-names {
    color: var(--text);
    font-size: 0.95rem;
    margin: 0 0 8px;
    line-height: 1.5;
}
.modal-university {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}
.modal-university i { color: var(--accent); margin-right: 8px; }
.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}
.modal-tag {
    font-size: 0.85rem;
    color: var(--accent);
    padding: 6px 14px;
    background: rgba(0, 255, 204, 0.08);
    border: 1px solid rgba(0, 255, 204, 0.25);
    border-radius: 20px;
    font-weight: 500;
}
.modal-desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
    margin: 0 0 28px;
}
.modal-actions { margin-top: 24px; }
.btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.35s;
}
.btn-demo:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--accent-glow);
}
.btn-demo:active { transform: translateY(-1px); }
.btn-demo i { font-size: 0.9rem; }
.btn-demo.coming-soon {
    background: var(--bg-card);
    color: var(--text-muted);
    border: 1px solid var(--border);
    cursor: default;
}
.btn-demo.coming-soon:hover { transform: none; box-shadow: none; }

/* ========== CERT MODAL (View Only - No Download) ========== */
.cert-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.cert-modal.active { display: flex; }
.cert-modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    max-width: 90%;
    max-height: 90vh;
    overflow: auto;
    position: relative;
    padding: 24px 24px 32px;
    cursor: default;
    animation: modalIn 0.35s ease-out;
}
.cert-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s;
}
.cert-modal-close:hover {
    background: var(--accent);
    color: var(--bg);
}
.cert-modal-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--accent);
    margin: 0 0 20px;
    padding-right: 50px;
}
.cert-modal-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}
.cert-modal-img {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border-radius: 8px;
    user-select: none;
    pointer-events: none;
}
.cert-modal-loading, .cert-modal-error {
    color: var(--text-muted);
    font-size: 1rem;
}
.cert-modal-loading i { margin-right: 8px; }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(18, 18, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 32px;
        padding: 80px 40px;
        border-left: 1px solid var(--border);
        transition: right 0.35s;
        z-index: 999;
    }
    .nav-links.open { right: 0; }
    .nav-links a { font-size: 1.1rem; }
    .nav-social {
        border-left: none;
        padding-left: 0;
        margin-left: 0;
        margin-top: 16px;
        padding-top: 16px;
        border-top: 1px solid var(--border);
    }
    .nav-lang {
        right: 52px;
    }
    .nav-toggle { display: block; }
    .hero-container h1 { font-size: 2.25rem; }
    .profile-frame { width: 160px; height: 160px; }
    .hero-intro { font-size: 0.9rem; margin: 16px 12px 0; padding: 0 8px; }
    h2 { font-size: 1.5rem; margin-bottom: 32px; }
    .card-grid { grid-template-columns: 1fr; }
    .research-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 16px; margin-top: 32px; }
    .tech-item { padding: 20px 12px; }
    .tech-item i { font-size: 1.75rem; }
    .footer-inner { flex-direction: column; text-align: center; }
    .modal-body { padding: 40px 24px; }
    .modal-team-gratitude { padding: 16px; }
    .modal-gallery-item { min-height: 350px; padding: 16px; }
    .modal-tags { gap: 8px; }
    .modal-tag { font-size: 0.8rem; padding: 5px 12px; }
    .card-footer-icons { margin: 12px 0; font-size: 1.1rem; }
}