:root {
    --primary: #0f2027; /* Deep academic dark */
    --secondary: #203a43;
    --accent: #c5a059; /* Gold for prestige */
    --light: #fdfbf7;
    --glass: rgba(255, 255, 255, 0.9);
    --glass-dark: rgba(15, 32, 39, 0.85);
}

body {
    font-family: 'Montserrat', sans-serif;
    color: #333;
    background-color: #f4f7f6;
    overflow-x: hidden;
}

h1, h2, h3, .serif-font {
    font-family: 'Playfair Display', serif;
}

/* --- Modern Hero Section --- */
.hero-section {
    position: relative;
    min-height: 100vh; /* Tam ekran kapla */
    display: flex;
    align-items: center;
    background: linear-gradient(-45deg, #0f2027, #203a43, #2c5364, #1a2a33);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite; /* Arka plan renk hareketi */
    overflow: hidden;
    padding-top: 80px; /* Navbar payı */
}

/* Arka plan hareket animasyonu */
@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Dekoratif Yuvarlaklar (Arka plan süsü) */
.hero-decoration {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, rgba(0,0,0,0) 70%);
    opacity: 0.15;
    z-index: 1;
    filter: blur(60px);
}
.deco-1 { width: 500px; height: 500px; top: -100px; right: -100px; }
.deco-2 { width: 300px; height: 300px; bottom: 50px; left: -50px; background: radial-gradient(circle, #fff 0%, rgba(0,0,0,0) 70%); opacity: 0.05;}

/* Sol Taraftaki Metin Alanı */
.hero-content-left {
    z-index: 5;
    position: relative;
    color: white;
    text-align: left; /* Mobilde center yapılabilir */
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 20px;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.hero-title-modern {
    font-size: 4rem; /* Büyük başlık */
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.hero-description {
    font-size: 1.1rem;
    opacity: 0.8;
    margin-bottom: 2rem;
    font-weight: 300;
    max-width: 600px;
    line-height: 1.6;
}

/* Sağ Taraftaki Afiş/Poster Alanı */
.hero-poster-wrapper {
    position: relative;
    z-index: 5;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Afişin kendisi */
.poster-card {
    position: relative;
    width: 100%;
    max-width: 450px; /* Afiş genişliği */
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: perspective(1000px) rotateY(-10deg) rotateX(5deg); /* 3D Duruş */
    transition: transform 0.3s ease;
    animation: floating 6s ease-in-out infinite; /* Süzülme Animasyonu */
    border: 10px solid rgba(255,255,255,0.1); /* Çerçeve efekti */
}

.poster-card img {
    width: 100%;
    border-radius: 10px;
    display: block;
}

/* Posterin arkasındaki parıltı */
.poster-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: var(--accent);
    filter: blur(80px);
    opacity: 0.4;
    z-index: -1;
    animation: pulseGlow 4s infinite alternate;
}

/* Havada Süzülme (Floating) Animasyonu */
@keyframes floating {
    0% { transform: perspective(1000px) rotateY(-5deg) translateY(0px); }
    50% { transform: perspective(1000px) rotateY(-5deg) translateY(-20px); }
    100% { transform: perspective(1000px) rotateY(-5deg) translateY(0px); }
}

@keyframes pulseGlow {
    0% { opacity: 0.2; transform: translate(-50%, -50%) scale(0.9); }
    100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.1); }
}

/* Responsive Düzenlemeler */
@media (max-width: 991px) {
    .hero-section {
        text-align: center;
        padding-top: 120px;
        height: auto;
        padding-bottom: 60px;
    }
    .hero-content-left {
        text-align: center;
        margin-bottom: 50px;
    }
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    .poster-card {
        transform: none; /* Mobilde düz dursun */
        animation: floating 6s ease-in-out infinite; /* Sadece yukarı aşağı */
        max-width: 350px;
    }
    @keyframes floating {
        0% { transform: translateY(0px); }
        50% { transform: translateY(-15px); }
        100% { transform: translateY(0px); }
    }
    .hero-title-modern {
        font-size: 2.8rem;
    }
}
/* --- Navbar --- */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all 0.3s;
}
.navbar-brand img {
    height: 50px; /* Logo placeholder */
}
.nav-link {
    color: var(--primary) !important;
    font-weight: 600;
    margin-left: 20px;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: var(--accent);
    bottom: 0;
    left: 0;
    transition: 0.3s;
}
.nav-link:hover::after {
    width: 100%;
}

/* --- Sections General --- */
.section-padding {
    padding: 100px 0;
    position: relative;
}
.section-title {
    margin-bottom: 60px;
    position: relative;
    display: inline-block;
}
.section-title::before {
    content: '';
    position: absolute;
    width: 60px;
    height: 3px;
    background: var(--accent);
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

/* --- About --- */
.about-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}
.about-text {
    padding: 40px;
}

/* --- Topics Grid --- */
.topic-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.4s;
    border: 1px solid rgba(0,0,0,0.05);
    height: 100%;
}
.topic-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    background: var(--primary);
}
.topic-item:hover h5, .topic-item:hover i {
    color: white !important;
}
.topic-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
    transition: 0.4s;
}

/* --- Committees --- */
.committee-box {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    height: 100%;
}
.committee-scroll {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
}
.committee-scroll::-webkit-scrollbar {
    width: 5px;
}
.committee-scroll::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 5px;
}
.person-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}
.person-icon {
    width: 40px;
    height: 40px;
    background: var(--light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-right: 15px;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline-item {
    padding: 20px 30px;
    background: white;
    border-radius: 10px;
    margin-bottom: 20px;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border-left: 4px solid var(--accent);
}
.timeline-date {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.1rem;
}

/* --- Footer --- */
footer {
    background: var(--primary);
    color: white;
    padding: 80px 0 30px;
    position: relative;
}
.footer-logo {
    font-family: 'Playfair Display';
    font-size: 1.8rem;
    margin-bottom: 20px;
}
.contact-info li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}
.contact-info i {
    color: var(--accent);
    margin-right: 15px;
    margin-top: 5px;
}