/* ============================================
   Design 3: Geometric Bold
   Editorial, oversized type, geometric shapes
   ============================================ */

:root {
    --bg: #F5F0EB;
    --navy: #0D1B2A;
    --coral: #FF6B6B;
    --teal: #00D4AA;
    --text: #0D1B2A;
    --text-dim: #5a6a7a;
    --border: #d8d0c8;
    --font-display: 'Syne', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* --- Geometric Background Shapes --- */
.geo-shapes {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.geo {
    position: absolute;
    opacity: 0.06;
    animation: geoFloat 30s ease-in-out infinite;
}

.geo-circle {
    width: 500px; height: 500px;
    border-radius: 50%;
    border: 2px solid var(--coral);
    top: -100px; right: -100px;
}

.geo-triangle {
    width: 0; height: 0;
    border-left: 200px solid transparent;
    border-right: 200px solid transparent;
    border-bottom: 350px solid var(--teal);
    bottom: -100px; left: -100px;
    animation-delay: -10s;
}

.geo-rect {
    width: 300px; height: 300px;
    border: 2px solid var(--navy);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    animation-delay: -20s;
}

@keyframes geoFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(20px, -30px) rotate(5deg); }
    66% { transform: translate(-15px, 20px) rotate(-3deg); }
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 72px;
    z-index: 1000;
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(245, 240, 235, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--navy);
}

.nav-logo span {
    color: var(--coral);
    font-size: 1rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dim);
    transition: color var(--transition);
}

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

.nav-cta {
    background: var(--navy) !important;
    color: white !important;
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
}

.nav-cta:hover { background: var(--coral) !important; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1002;
}

.hamburger span {
    width: 28px; height: 2px;
    background: var(--navy);
    transition: all var(--transition);
}

.hamburger.active span:first-child { transform: rotate(45deg) translate(3px, 5.5px); }
.hamburger.active span:last-child { transform: rotate(-45deg) translate(3px, -5.5px); }

.mobile-menu {
    position: fixed;
    top: 0; right: -100%;
    width: 100%; height: 100vh;
    background: var(--bg);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--transition-slow);
}

.mobile-menu.active { right: 0; }
.mobile-menu ul { text-align: center; }
.mobile-menu li { margin-bottom: 1.5rem; }

.mobile-menu a {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    transition: color var(--transition);
}

.mobile-menu a:hover { color: var(--coral); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    border-radius: 999px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-coral {
    background: var(--coral);
    color: white;
}

.btn-coral:hover {
    background: var(--navy);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(13, 27, 42, 0.2);
}

.btn-dark {
    background: var(--navy);
    color: white;
}

.btn-dark:hover {
    background: var(--coral);
    transform: translateY(-2px);
}

.btn-lg { padding: 1.1rem 3rem; font-size: 1rem; }

/* --- Big Section Numbers --- */
.big-num {
    font-family: var(--font-display);
    font-size: clamp(5rem, 12vw, 10rem);
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 2px var(--border);
    line-height: 1;
    display: block;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral);
}

.section-head {
    margin-bottom: 4rem;
}

.section-head h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-top: -1.5rem;
}

.big-num--sm {
    font-size: clamp(2.5rem, 6vw, 4rem);
}

.section-head--sm {
    margin-bottom: 2rem;
}

.section-head--sm h2 {
    margin-top: -0.5rem;
}

.kurul-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--coral);
    margin-bottom: 1.5rem;
    margin-top: 2.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--coral);
    display: inline-block;
}

.kurul-title:first-of-type {
    margin-top: 0;
}

.duz-kurul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.duz-kurul span {
    padding: 0.55rem 1.1rem;
    font-family: var(--font-display);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border);
    border-radius: 999px;
    transition: all var(--transition);
    white-space: nowrap;
}

.duz-kurul span:hover {
    background: var(--navy);
    color: white;
    border-color: var(--navy);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 27, 42, 0.15);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 2rem 0;
    position: relative;
    z-index: 1;
}

.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.hero-tag {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral);
}

.hero-date {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dim);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 10vw, 9rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin-bottom: 3rem;
}

.hero-title .line { display: block; }
.hero-title .line--accent { color: var(--coral); }

.hero-logos {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.hero-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.08));
    transition: transform var(--transition);
}

.hero-logo:hover {
    transform: scale(1.05);
}

.hero-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-bottom: 3rem;
    border-bottom: 2px solid var(--navy);
}

.loc-city {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    display: block;
}

.loc-venue {
    font-size: 0.85rem;
    color: var(--text-dim);
    display: block;
}

/* Marquee */
.marquee {
    overflow: hidden;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.marquee-track {
    display: flex;
    white-space: nowrap;
    animation: marquee 25s linear infinite;
}

.marquee-track span {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    padding-right: 2rem;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-33.33%); }
}

/* --- Stats --- */
.stats {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

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

.stat-n {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1;
}

.stat-s { color: var(--coral); font-size: 1.5rem; font-weight: 700; }

.stat-l {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.3rem;
}

/* --- About --- */
.about {
    padding: 8rem 0;
    position: relative;
    z-index: 1;
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
}

.about-left { position: relative; }

.about-right h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.about-right .text-lg {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 1rem;
}

.about-right p {
    color: var(--text-dim);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* --- Speakers --- */
.speakers {
    padding: 8rem 0;
    position: relative;
    z-index: 1;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.sp-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1.5rem;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.5);
}

.sp-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(13, 27, 42, 0.08);
    border-color: var(--coral);
}

.sp-visual { position: relative; }

.sp-circle {
    width: 80px; height: 80px;
    border-radius: 50%;
    background: var(--coral);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    position: relative;
    z-index: 1;
}

.sp-shape {
    position: absolute;
    width: 60px; height: 60px;
    border-radius: 8px;
    background: var(--coral);
    opacity: 0.15;
    top: 30px; left: 40px;
    transform: rotate(15deg);
    transition: transform var(--transition);
}

.sp-card:hover .sp-shape { transform: rotate(25deg) scale(1.1); }

.sp-shape--teal { background: var(--teal); }
.sp-shape--navy { background: var(--navy); }

.sp-info h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.sp-uni {
    font-size: 0.8rem;
    color: var(--coral);
    font-weight: 500;
    display: block;
    margin-bottom: 0.75rem;
}

.sp-info p {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* --- Topics --- */
.topics {
    padding: 8rem 0;
    position: relative;
    z-index: 1;
}

.topic-row {
    display: grid;
    grid-template-columns: 60px 1fr 1.5fr 40px;
    gap: 2rem;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
    cursor: pointer;
}

.topic-row:first-child { border-top: 1px solid var(--border); }

.topic-row:hover {
    padding-left: 1rem;
    background: rgba(255, 255, 255, 0.5);
}

.topic-idx {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-dim);
}

.topic-row h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
}

.topic-row p {
    font-size: 0.88rem;
    color: var(--text-dim);
}

.topic-arrow {
    font-size: 1.2rem;
    color: var(--coral);
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition);
}

.topic-row:hover .topic-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* --- Dates --- */
.dates {
    padding: 5rem 0;
    position: relative;
    z-index: 1;
}

.dates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.date-card {
    padding: 1.25rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.5);
    transition: all var(--transition);
}

.date-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(13, 27, 42, 0.08);
}

.date-card--highlight {
    background: var(--navy);
    color: white;
    border-color: var(--navy);
}

.date-card--highlight h3 { color: white; }
.date-card--highlight p { color: rgba(255,255,255,0.7); }

.date-num {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.6rem;
}

.date-num span {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--coral);
    margin-left: 0.3rem;
}

.date-card h3 {
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.date-card p {
    font-size: 0.78rem;
    color: var(--text-dim);
}

/* --- Registration --- */
.registration {
    padding: 5rem 0;
    position: relative;
    z-index: 1;
}

.reg-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    align-items: stretch;
}

.reg-card {
    padding: 1.5rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.5);
    transition: all var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.reg-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(13, 27, 42, 0.08);
}

.reg-card--featured {
    border-color: var(--coral);
    box-shadow: 0 8px 30px rgba(255, 107, 107, 0.1);
}

.reg-badge {
    position: absolute;
    top: -12px; left: 50%;
    transform: translateX(-50%);
    background: var(--coral);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.3rem 1.2rem;
    border-radius: 999px;
}

.reg-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.15rem;
}

.reg-sub {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.reg-price {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.reg-card ul { margin-bottom: 1.2rem; flex: 1; }

.reg-card li {
    padding: 0.3rem 0;
    font-size: 0.88rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.reg-card li::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--coral);
    flex-shrink: 0;
}

.reg-card .btn { width: 100%; }

/* --- Venue --- */
.venue {
    padding: 8rem 0;
    position: relative;
    z-index: 1;
}

.venue-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.venue-left h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-top: -1rem;
    margin-bottom: 1rem;
}

.venue-left p {
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.venue-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.venue-info div {
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.6;
}

.venue-info strong {
    color: var(--coral);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.venue-box {
    aspect-ratio: 4/3;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
}

.venue-box small {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

/* --- Footer --- */
.footer {
    border-top: 2px solid var(--navy);
    padding-top: 0;
    position: relative;
    z-index: 1;
}

.footer-top {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border);
}

.footer-cta { text-align: center; }

.footer-cta h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    padding: 3rem 0;
}

.footer-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

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

.footer-grid p {
    font-size: 0.85rem;
    color: var(--text-dim);
    max-width: 280px;
}

.footer-grid h4 {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.footer-grid a,
.footer-grid span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
    transition: color var(--transition);
}

.footer-grid a:hover { color: var(--coral); }

.footer-bottom {
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 2rem; right: 2rem;
    width: 48px; height: 48px;
    background: var(--navy);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0; visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 100;
}

.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--coral); transform: translateY(-4px); }

/* --- Reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* --- Responsive --- */

/* Large tablets / small desktops */
@media (max-width: 1200px) {
    .container { padding: 0 1.5rem; }
    .nav-inner { padding: 0 1.5rem; }
    .hero { padding: 7rem 1.5rem 0; }
    .reg-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Tablets landscape */
@media (max-width: 1024px) {
    .nav-links { gap: 1.2rem; }
    .nav-links a { font-size: 0.8rem; }

    .hero-title { font-size: clamp(3rem, 8vw, 6rem); }
    .hero-logo { height: 65px; }

    .about-layout { grid-template-columns: 1fr 2fr; gap: 2.5rem; }
    .about { padding: 5rem 0; }

    .speakers { padding: 5rem 0; }
    .speakers-grid { gap: 1.2rem; }
    .duz-kurul { gap: 0.5rem; }
    .duz-kurul span { font-size: 0.78rem; padding: 0.45rem 0.9rem; }

    .topics { padding: 5rem 0; }

    .dates-grid { grid-template-columns: repeat(3, 1fr); }

    .reg-grid { grid-template-columns: repeat(3, 1fr); }

    .venue { padding: 5rem 0; }
    .venue-split { gap: 2.5rem; }

    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 1.5rem; }
    .footer-top { padding: 3rem 0; }
}

/* Tablets portrait */
@media (max-width: 768px) {
    .container { padding: 0 1.25rem; }
    .nav-inner { padding: 0 1.25rem; }
    .nav-links { display: none; }
    .hamburger { display: flex; }

    .mobile-menu a { font-size: 2rem; }

    .hero { padding: 5.5rem 1.25rem 0; min-height: auto; padding-bottom: 2rem; }
    .hero-top { flex-direction: column; gap: 0.5rem; align-items: flex-start; margin-bottom: 1.5rem; }
    .hero-title { font-size: clamp(2.5rem, 11vw, 4.5rem); margin-bottom: 2rem; }
    .hero-logos { gap: 1.5rem; margin-bottom: 1.5rem; }
    .hero-logo { height: 55px; }
    .hero-bottom { flex-direction: column; gap: 1.2rem; align-items: flex-start; padding-bottom: 2rem; }

    .marquee-track span { font-size: 0.85rem; }

    .stats { padding: 3rem 0; }
    .stats-row { grid-template-columns: repeat(4, 1fr); gap: 1rem; }
    .stat-n { font-size: clamp(1.8rem, 5vw, 2.5rem); }
    .stat-l { font-size: 0.7rem; }

    .about { padding: 4rem 0; }
    .about-layout { grid-template-columns: 1fr; gap: 1.5rem; }
    .big-num { font-size: clamp(3rem, 10vw, 5rem); }
    .big-num--sm { font-size: clamp(2rem, 6vw, 3rem); }

    .speakers { padding: 4rem 0; }
    .speakers-grid { grid-template-columns: 1fr !important; gap: 1rem; }
    .sp-card { grid-template-columns: 80px 1fr; gap: 1rem; padding: 1.2rem; }
    .sp-circle { width: 60px; height: 60px; font-size: 1.1rem; }
    .sp-shape { width: 45px; height: 45px; top: 20px; left: 30px; }
    .sp-info h3 { font-size: 0.95rem; }
    .kurul-title { font-size: 1.1rem; margin-top: 2rem; margin-bottom: 1rem; }

    .duz-kurul { gap: 0.5rem; }
    .duz-kurul span { font-size: 0.75rem; padding: 0.4rem 0.8rem; }

    .topics { padding: 4rem 0; }
    .topic-row { grid-template-columns: 40px 1fr 2fr; gap: 1rem; padding: 1rem 0; }
    .topic-arrow { display: none; }
    .topic-row h3 { font-size: 1rem; }
    .topic-row p { font-size: 0.8rem; }

    .dates { padding: 3rem 0; }
    .dates-grid { grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
    .date-card { padding: 1rem; }
    .date-num { font-size: 1.4rem; }
    .date-card h3 { font-size: 0.78rem; }
    .date-card p { font-size: 0.7rem; }

    .registration { padding: 3rem 0; }
    .reg-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
    .reg-card { padding: 1.2rem 1rem; }
    .reg-card h3 { font-size: 0.95rem; }
    .reg-price { font-size: 1.6rem; margin-bottom: 0.75rem; padding-bottom: 0.75rem; }
    .reg-card li { font-size: 0.8rem; padding: 0.2rem 0; }
    .reg-badge { font-size: 0.6rem; padding: 0.2rem 0.8rem; top: -10px; }
    .btn { padding: 0.7rem 1.5rem; font-size: 0.82rem; }

    .venue { padding: 4rem 0; }
    .venue-split { grid-template-columns: 1fr; gap: 2rem; }
    .venue-box { aspect-ratio: 16/9; }

    .footer-top { padding: 3rem 0; }
    .footer-cta h2 { font-size: clamp(1.4rem, 4vw, 2rem); margin-bottom: 1rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; padding: 2rem 0; }

    .back-to-top { width: 40px; height: 40px; font-size: 1rem; bottom: 1.5rem; right: 1.5rem; }

    .section-head { margin-bottom: 2rem; }
    .section-head h2 { margin-top: -0.8rem; }
    .section-head--sm { margin-bottom: 1.5rem; }
}

/* Mobile phones */
@media (max-width: 480px) {
    .container { padding: 0 1rem; }
    .nav-inner { padding: 0 1rem; }
    .navbar { height: 60px; }
    .nav-logo { font-size: 1.3rem; }
    .nav-logo span { font-size: 0.85rem; }

    .mobile-menu a { font-size: 1.6rem; }
    .mobile-menu li { margin-bottom: 1rem; }

    .hero { padding: 4.5rem 1rem 0; }
    .hero-tag { font-size: 0.65rem; letter-spacing: 0.1em; }
    .hero-date { font-size: 0.85rem; }
    .hero-title { font-size: clamp(2rem, 10vw, 3.5rem); margin-bottom: 1.5rem; }
    .hero-logos { gap: 1rem; margin-bottom: 1rem; }
    .hero-logo { height: 45px; }
    .hero-bottom { padding-bottom: 1.5rem; }
    .loc-city { font-size: 1rem; }
    .loc-venue { font-size: 0.78rem; }

    .marquee { padding: 1rem 0; }
    .marquee-track span { font-size: 0.75rem; }

    .stats { padding: 2rem 0; }
    .stats-row { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .stat-n { font-size: clamp(1.5rem, 8vw, 2.2rem); }

    .about { padding: 3rem 0; }
    .about-right h2 { font-size: 1.4rem; margin-bottom: 1rem; }
    .about-right .text-lg { font-size: 0.95rem; }
    .about-right p { font-size: 0.88rem; }
    .big-num { font-size: clamp(2.5rem, 10vw, 4rem); }
    .big-num--sm { font-size: clamp(1.8rem, 6vw, 2.5rem); }

    .speakers { padding: 3rem 0; }
    .sp-card { grid-template-columns: 65px 1fr; gap: 0.8rem; padding: 1rem; }
    .sp-circle { width: 50px; height: 50px; font-size: 0.95rem; }
    .sp-shape { width: 35px; height: 35px; top: 18px; left: 25px; }
    .sp-info h3 { font-size: 0.85rem; }
    .sp-info p { font-size: 0.78rem; }
    .kurul-title { font-size: 1rem; margin-top: 1.5rem; margin-bottom: 0.8rem; }

    .duz-kurul { gap: 0.4rem; }
    .duz-kurul span { font-size: 0.7rem; padding: 0.35rem 0.7rem; }

    .topics { padding: 3rem 0; }
    .topic-row { grid-template-columns: 30px 1fr; gap: 0.75rem; padding: 0.8rem 0; }
    .topic-row p { display: none; }
    .topic-idx { font-size: 0.75rem; }
    .topic-row h3 { font-size: 0.9rem; }

    .dates { padding: 2.5rem 0; }
    .dates-grid { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
    .date-card { padding: 0.8rem; border-radius: 10px; }
    .date-num { font-size: 1.2rem; margin-bottom: 0.4rem; }
    .date-num span { font-size: 0.6rem; }
    .date-card h3 { font-size: 0.72rem; }
    .date-card p { display: none; }

    .registration { padding: 2.5rem 0; }
    .reg-grid { grid-template-columns: 1fr 1fr; gap: 0.6rem; }
    .reg-card { padding: 1rem 0.8rem; border-radius: 10px; }
    .reg-card h3 { font-size: 0.85rem; }
    .reg-sub { font-size: 0.72rem; margin-bottom: 0.6rem; }
    .reg-price { font-size: 1.3rem; margin-bottom: 0.6rem; padding-bottom: 0.6rem; }
    .reg-card ul { margin-bottom: 0.8rem; }
    .reg-card li { font-size: 0.72rem; padding: 0.15rem 0; gap: 0.4rem; }
    .reg-card li::before { width: 4px; height: 4px; }
    .reg-badge { font-size: 0.55rem; padding: 0.15rem 0.6rem; top: -8px; }
    .btn { padding: 0.6rem 1rem; font-size: 0.75rem; }
    .btn-lg { padding: 0.8rem 2rem; font-size: 0.85rem; }

    .venue { padding: 3rem 0; }
    .venue-left h2 { font-size: 1.5rem; }
    .venue-left p { font-size: 0.85rem; margin-bottom: 1.2rem; }
    .venue-box { font-size: 1rem; }
    .venue-box small { font-size: 0.75rem; }

    .footer-top { padding: 2rem 0; }
    .footer-cta h2 { font-size: 1.2rem; }
    .footer-cta p { font-size: 0.82rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; padding: 1.5rem 0; }
    .footer-logo { font-size: 1.3rem; }
    .footer-bottom { padding: 1rem 0; }
    .footer-bottom p { font-size: 0.72rem; }

    .back-to-top { width: 36px; height: 36px; font-size: 0.9rem; bottom: 1rem; right: 1rem; }

    .section-head { margin-bottom: 1.5rem; }
    .section-head h2 { font-size: 1.5rem; margin-top: -0.5rem; }
}