/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    --primary: #C62828;
    --primary-light: #EF5350;
    --primary-dark: #8E0000;
    --accent: #FF1744;
    --bg-light: #FFEBEE;
    --bg-page: #FFF8F8;
    --text-dark: #3E2723;
    --subtitle-gold: #FFD54F;
    --gradient-primary: linear-gradient(135deg, #C62828, #8E0000);
}

/* GENEL TASARIM */
body {
    font-family: 'Poppins', "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-page);
    margin: 0;
    padding: 0;
}
a { text-decoration: none; color: var(--primary); transition: all 0.2s ease; }
a:hover { color: var(--primary-dark); }

.rounded-custom { border-radius: 16px !important; }
.shadow-soft { box-shadow: 0 10px 30px rgba(0,0,0,0.08) !important; }

/* JUMBOTRON / BANNER */
.jumbotron-custom {
    background-color: #333;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    background-attachment: fixed;
    min-height: 650px;
    padding: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}
/* Banner Overlay – Hafif Karartma */
.jumbotron-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}
.jumbotron-inner {
    position: relative;
    z-index: 2;
    width: 100%;
}

/* UST BAR */
.top-overlay-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 50px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 10;
}

.header-logo {
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.8));
    transition: transform 0.3s;
    max-width: 160px;
    height: auto;
}
.header-logo:hover { transform: scale(1.02); }

/* LOGIN BUTONU */
.btn-login-custom {
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    color: #fff;
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    padding: 12px 30px;
    border-radius: 50px;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
    border: 1px solid rgba(255,255,255,0.4);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}
.btn-login-custom:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 23, 68, 0.6);
}

.jumbotron-content {
    margin-top: 80px;
    max-width: 1100px;
    padding: 0 15px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

/* TYPOGRAPHY */
.hero-title {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: 10px;
    text-shadow: 0 5px 20px rgba(0,0,0,0.6);
}

.hero-subtitle {
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    font-size: clamp(1.2rem, 3vw, 2.2rem);
    color: var(--subtitle-gold);
    letter-spacing: 0.5px;
    margin-bottom: 25px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.9);
}

.hero-date {
    display: inline-block;
    font-family: 'Poppins', sans-serif;
    font-weight: 200;
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: #fff;
    background: transparent;
    border: none;
    text-shadow: 0 2px 5px rgba(0,0,0,1);
    margin-top: 10px;
}
.hero-date i {
    margin-right: 8px;
    color: var(--accent);
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.5));
}

/* COUNTDOWN */
#countdown-box {
    margin-top: 50px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    padding: 25px 30px;
    border-radius: 25px;
    border: 1px solid rgba(255,255,255,0.2);
    display: inline-block;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: auto;
    max-width: 100%;
}
#countdown ul { list-style: none; padding: 0; margin: 0; display: flex; gap: clamp(15px, 4vw, 40px); justify-content: center; flex-wrap: wrap; }
#countdown li { text-align: center; color: #fff; }

#countdown span {
    font-family: 'Quicksand', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    display: block;
    line-height: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
#countdown .label {
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
    margin-top: 5px;
    font-weight: 300;
}

@media (max-width: 991px) {
    .top-overlay-bar {
        position: relative;
        flex-direction: column;
        align-items: center;
        padding: 20px;
        gap: 20px;
        background: rgba(0,0,0,0.6);
    }
    .header-logo { max-width: 120px; }
    .jumbotron-content { margin-top: 30px; }
}

/* SIDEBAR MENU */
.sidemenu-container {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    border: 1px solid #fff;
}
.sidemenu { padding: 0; list-style: none; margin: 0; }
.sidemenu li { border-bottom: 1px solid #f5f5f5; }
.sidemenu li:last-child { border-bottom: none; }
.sidemenu li a {
    display: block;
    padding: 14px 20px;
    color: #444;
    background: #fff;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.sidemenu li a:hover {
    background: #fdfdfd;
    color: var(--accent);
    padding-left: 25px;
    font-weight: 600;
}

h1.sidebar-title {
    font-family: 'Quicksand', sans-serif;
    font-size: 16px;
    text-transform: uppercase;
    color: #fff;
    background: var(--gradient-primary);
    padding: 15px;
    margin-top: 25px;
    margin-bottom: 15px;
    text-align: center;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: 0 5px 15px rgba(198, 40, 40, 0.25);
}

h1.sidebar-title-link { cursor: pointer; display: flex; justify-content: space-between; align-items: center; }

/* CONTENT */
#content-wrap { background-color: #fff; padding: 30px 0; border-top: none; }

/* SECTION HEADER */
.section-header {
    font-family: 'Quicksand', sans-serif;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #eee;
    position: relative;
}
.section-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 3px;
    background: var(--accent);
}

/* SPONSOR GRID */
.sponsor-grid-item {
    background-color: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 16px;
    padding: 15px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.sponsor-grid-item > a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
}
.sponsor-grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    border-color: #e0e0e0;
}
.supporter-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(20%);
    transition: 0.3s;
}
.sponsor-grid-item:hover .supporter-img { filter: grayscale(0%); }

/* SAG SIDEBAR KUTULARI */
.right-sponsor-box {
    background: #fff;
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 25px;
    border: 1px solid #f0f0f0;
    box-shadow: 0 5px 20px rgba(0,0,0,0.03);
    transition: transform 0.3s;
}
.right-sponsor-box:hover { transform: translateY(-5px); }

/* FOOTER */
footer { background: #111; color: #bbb; padding: 60px 0; margin-top: 60px; text-align: center; border-top: 4px solid var(--primary); }
footer a { color: var(--primary-light); }
footer a:hover { color: #fff; }
.social-icons a {
    display: inline-flex; width: 48px; height: 48px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    color: #fff;
    align-items: center; justify-content: center;
    margin: 0 6px;
    transition: 0.4s;
    font-size: 18px;
}
.social-icons a:hover { background: var(--primary); color: #fff; transform: scale(1.15); box-shadow: 0 0 15px rgba(198, 40, 40, 0.5); }

.blink { animation: blinker 1.5s ease-in-out infinite; color: var(--primary); font-weight: bold; }
@keyframes blinker { 50% { opacity: 0.5; } }

/* --- SPONSOR BASLIK RENKLERI --- */

/* Diamond */
.sidebar-header-diamond {
    font-family: 'Quicksand', sans-serif;
    font-size: 16px;
    text-transform: uppercase;
    color: #004a6f;
    background: linear-gradient(135deg, #b6f1ff 0%, #e0faff 100%);
    padding: 15px;
    margin-top: 25px;
    margin-bottom: 15px;
    text-align: center;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    border: 1px solid #9eeafe;
    box-shadow: 0 5px 15px rgba(0, 198, 255, 0.2);
}

/* Gold */
.sidebar-header-gold {
    font-family: 'Quicksand', sans-serif;
    font-size: 16px;
    text-transform: uppercase;
    color: #634f00;
    background: linear-gradient(135deg, #ffd700 0%, #ffec8b 100%);
    padding: 15px;
    margin-top: 25px;
    margin-bottom: 15px;
    text-align: center;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    border: 1px solid #e6c200;
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

/* Bronze */
.sidebar-header-bronze {
    font-family: 'Quicksand', sans-serif;
    font-size: 16px;
    text-transform: uppercase;
    color: #57280e;
    background: linear-gradient(135deg, #e6ac86 0%, #f5ccb0 100%);
    padding: 15px;
    margin-top: 25px;
    margin-bottom: 15px;
    text-align: center;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    border: 1px solid #d49a75;
    box-shadow: 0 5px 15px rgba(205, 127, 50, 0.2);
}

/* Technical Co-Sponsors */
.sidebar-header-technical {
    font-family: 'Quicksand', sans-serif;
    font-size: 16px;
    text-transform: uppercase;
    color: #fff;
    background: var(--gradient-primary);
    padding: 15px;
    margin-top: 25px;
    margin-bottom: 15px;
    text-align: center;
    border-radius: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: 0 5px 15px rgba(198, 40, 40, 0.25);
}

/* --- MAIN.PHP DUYURU KARTLARI --- */
.card-slim {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background: #fff;
    overflow: hidden;
}
.card-slim:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.card-slim .card-header {
    padding: 10px 15px;
    font-size: 15px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
}

/* Renk Varyasyonlari */
.card-soft-danger .card-header { background: linear-gradient(135deg, #EF5350, #C62828); color: white; }
.card-soft-warning .card-header { background: linear-gradient(135deg, #fdcb6e, #e17055); color: white; }
.card-soft-info .card-header { background: linear-gradient(135deg, #EF5350, #C62828); color: white; }
.card-soft-success .card-header { background: linear-gradient(135deg, #55efc4, #00b894); color: white; }

.card-body-slim { padding: 15px; }

.announcement-icon-slim {
    font-size: 32px;
    margin-bottom: 10px;
    opacity: 0.85;
}

/* Buton Pill */
.btn-pill {
    border-radius: 50px;
    padding: 10px 25px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s;
}
.btn-pill:hover { transform: scale(1.03); }
.btn-pill-sm {
    border-radius: 50px;
    padding: 5px 15px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    transition: all 0.2s;
}
.btn-pill-sm:hover { transform: scale(1.02); }

/* Yillar Rozetleri */
.badge-year {
    display: inline-block;
    padding: 10px 20px;
    margin: 6px;
    background-color: #fff;
    border: 1px solid #e1e1e1;
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: bold;
    border-radius: 50px;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.badge-year span { font-weight: 300; font-size: 0.9em; color: #666; }
.badge-year:hover {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}
.badge-year:hover span { color: #ccc; }

/* Baskanlar Bolumu */
.chair-box { text-align: center; padding: 10px; }
.chair-name {
    font-family: 'Quicksand', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #333;
    display: block;
    margin-bottom: 5px;
}
.chair-role {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 600;
}
.chair-uni {
    font-size: 0.85rem;
    color: #777;
    display: block;
}

/* Hover Efekti */
.group-hover-effect { transition: transform 0.3s ease, box-shadow 0.3s ease; }
.group-hover-effect:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1) !important;
}