:root {
    --bg-dark: #0f0a0f;
    --bg-card: #1c151c;
    --bg-card-hover: #2a1f2a;
    --primary: #7d1033;
    --primary-light: #ba1e53;
    --text-main: #f8f9fa;
    --text-muted: #b0a8b0;
    --accent: #ff2a75;
    --font-main: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* BACKGROUND STARS */
#stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    animation: twinkle infinite alternate;
}

@keyframes twinkle {
    0% { opacity: 0.2; transform: scale(0.8); box-shadow: 0 0 5px rgba(255, 255, 255, 0.2); }
    100% { opacity: 1; transform: scale(1.2); box-shadow: 0 0 10px rgba(255, 255, 255, 0.8); }
}

/* ANIMATIONS */
.reveal {
    opacity: 0;
    transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.up { transform: translateY(60px); }
.reveal.left { transform: translateX(-80px); }
.reveal.right { transform: translateX(80px); }
.reveal.scale { transform: scale(0.9); }

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

.glow-text {
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.5), 0 0 30px rgba(255, 42, 117, 0.4);
}

/* NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(15, 10, 15, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
    cursor: pointer;
}

.logo span {
    font-weight: 800;
}

.logo i {
    font-size: 20px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.hamburger {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* HERO */
.hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding-top: 60px;
    overflow: hidden;
}

.hero-bg-image {
    position: absolute;
    top: -5%;
    left: -5%;
    width: 110%;
    height: 110%;
    background: url('assets/images/hero-bg.png') center/cover no-repeat;
    z-index: 0;
    animation: hero-wave 20s ease-in-out infinite alternate;
}

@keyframes hero-wave {
    0% { transform: scale(1) translate(0, 0); }
    50% { transform: scale(1.02) translate(-1%, 1%); }
    100% { transform: scale(1.05) translate(1%, -1%); }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 10, 15, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-title {
    font-size: 80px;
    font-weight: 800;
    letter-spacing: 5px;
    margin-bottom: 10px;
    text-shadow: 0px 0px 30px rgba(255, 42, 117, 0.6), 0px 0px 10px rgba(255, 255, 255, 0.3);
    animation: glow-pulse 3s infinite alternate;
}

@keyframes glow-pulse {
    from { text-shadow: 0px 0px 20px rgba(255, 42, 117, 0.4), 0px 0px 5px rgba(255, 255, 255, 0.2); }
    to { text-shadow: 0px 0px 40px rgba(255, 42, 117, 0.8), 0px 0px 15px rgba(255, 255, 255, 0.6); }
}

.subtitle {
    font-size: 20px;
    letter-spacing: 3px;
    margin-bottom: 50px;
    font-weight: 300;
}

.countdown-container {
    display: flex;
    gap: 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 30px 50px;
    border-radius: 20px;
    margin-bottom: 50px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}

.countdown-item span {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 5px;
}

.countdown-item p {
    font-size: 12px;
    letter-spacing: 2px;
    font-weight: 600;
    color: var(--text-muted);
}

.hero-footer-text {
    font-size: 18px;
    font-weight: 300;
    letter-spacing: 1px;
}

/* SECTIONS COMMON */
section {
    padding: 100px 50px;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 60px;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* WHY ATTEND */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(28, 21, 28, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 50px 30px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-15px) scale(1.02);
    background: rgba(42, 31, 42, 0.8);
    border-color: rgba(255, 42, 117, 0.5);
    box-shadow: 0 15px 40px rgba(255, 42, 117, 0.2);
}

.icon-wrapper {
    font-size: 40px;
    color: var(--accent);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
}

/* MISSION VISION */
.mission-vision {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(125, 16, 51, 0.05) 100%);
}

.mv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto 30px auto;
}

.mve-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.mv-card {
    background: rgba(28, 21, 28, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s ease, background 0.3s, box-shadow 0.3s;
}

.mv-card:hover {
    transform: translateY(-10px);
    background: rgba(42, 31, 42, 0.8);
    box-shadow: 0 15px 40px rgba(125, 16, 51, 0.3);
}

.mv-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-light);
    text-align: center;
}

.mv-card h4 {
    font-size: 20px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent);
}

.mv-card p {
    color: var(--text-muted);
    font-size: 15px;
}

/* SPEAKERS */
.speaker-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.speaker-card {
    display: flex;
    background: rgba(28, 21, 28, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.4s ease, box-shadow 0.3s, border-color 0.3s;
}

.speaker-card:hover {
    transform: translateY(-8px);
    border-color: rgba(56, 182, 255, 0.4);
    box-shadow: 0 15px 40px rgba(56, 182, 255, 0.15);
}

.speaker-img {
    width: 300px;
    background: linear-gradient(135deg, var(--primary), var(--bg-dark));
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    color: rgba(255,255,255,0.3);
    object-fit: cover;
    position: relative;
    border-right: 2px solid rgba(56, 182, 255, 0.3);
}

.speaker-info {
    padding: 40px;
    flex: 1;
}

.speaker-info h3 {
    font-size: 28px;
    margin-bottom: 5px;
}

.speaker-info .role {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 15px;
}

.tags {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tags span {
    background: rgba(255, 42, 117, 0.1);
    color: var(--accent);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.speaker-info .desc {
    color: var(--text-muted);
    font-size: 15px;
}

/* SPONSORS */
.sponsors-section {
    padding: 80px 50px;
    text-align: center;
}

.sponsors-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    max-width: 1200px;
    margin: 40px auto 0 auto;
}

.sponsor-card {
    background: rgba(28, 21, 28, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 200px;
    height: 120px;
    transition: all 0.4s ease;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.sponsor-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 42, 117, 0.4);
    box-shadow: 0 15px 30px rgba(255, 42, 117, 0.15);
}

.sponsor-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%) opacity(0.7);
    transition: all 0.4s ease;
    border-radius: 5px;
}

.sponsor-card:hover .sponsor-logo {
    filter: grayscale(0%) opacity(1);
}

/* CONTACT */
.contact-section {
    text-align: center;
}

.contact-info {
    background: rgba(28, 21, 28, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 50px;
    border-radius: 20px;
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.contact-info p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.contact-btn {
    display: inline-block;
    background: var(--primary);
    color: var(--text-main);
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.3s, transform 0.3s;
    margin-bottom: 30px;
}

.contact-btn:hover {
    background: var(--accent);
    transform: translateY(-5px);
}

.contact-btn i {
    margin-right: 10px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 30px;
}

.social-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    font-size: 24px;
    text-decoration: none;
    transition: all 0.3s;
}

.social-icon:hover {
    transform: translateY(-5px);
}

.social-icon.instagram:hover {
    background: #E1306C;
}

.social-icon.linkedin:hover {
    background: #0077b5;
}

.social-icon.medium:hover {
    background: #00ab6c;
}

.social-icon.tiktok:hover {
    background: #ff0050;
}

footer {
    text-align: center;
    padding: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 14px;
}

.developer-credit {
    margin-top: 25px;
    font-size: 13px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.dev-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
}

.dev-info {
    text-align: left;
    line-height: 1.4;
}

.dev-linkedin {
    color: #0077b5;
    font-size: 16px;
    margin-left: 5px;
    text-decoration: none;
    transition: transform 0.3s, color 0.3s;
    display: inline-block;
}

.dev-linkedin:hover {
    transform: translateY(-2px);
    color: #00a0dc;
}

/* RESPONSIVE */
@media (max-width: 992px) {
    .mv-grid {
        grid-template-columns: 1fr;
    }
    .mve-grid {
        grid-template-columns: 1fr;
    }
    .speaker-card {
        flex-direction: column;
    }
    .speaker-img {
        width: 100%;
        height: 250px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: block;
    }
    .main-title {
        font-size: 50px;
    }
    .countdown-container {
        flex-wrap: wrap;
        justify-content: center;
        padding: 20px;
    }
    .countdown-item {
        min-width: 60px;
    }
    .countdown-item span {
        font-size: 32px;
    }
    section {
        padding: 60px 20px;
    }
    .navbar {
        padding: 20px;
    }
}