/* TURKCE ARAMA: index sayfa stili bolum 1 */
/* BTÜ Temalı Arka Plan ve Değişkenler */
    :root {
        --btu-blue: #003366;
        --btu-accent: #00a8cc;
    }

    body {
        background-image: radial-gradient(circle, rgba(0, 51, 102, 0.03) 1px, transparent 1px);
        background-size: 30px 30px;
    }

    /* ============================================================
       DUYURU TİMELİNE STİLİ (Modern Tarihli Akış)
       ============================================================ */
    .announcement-timeline {
        position: relative;
        padding-left: 2rem;
    }

    .announcement-timeline::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 3px;
        background: linear-gradient(180deg, var(--btu-accent) 0%, #0056b3 100%);
        border-radius: 3px;
    }

    .announcement-item {
        position: relative;
        margin-bottom: 1.5rem;
        padding: 1rem;
        background: rgba(255, 255, 255, 0.95);
        border-radius: 12px;
        border-left: 4px solid var(--btu-accent);
        backdrop-filter: blur(5px);
        transition: all 0.3s ease;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    .announcement-item::before {
        content: '';
        position: absolute;
        left: -3.5rem;
        top: 1.5rem;
        width: 16px;
        height: 16px;
        background: var(--btu-accent);
        border: 4px solid white;
        border-radius: 50%;
        box-shadow: 0 0 0 3px var(--btu-accent);
        z-index: 2;
    }

    .announcement-item:hover {
        transform: translateX(8px);
        box-shadow: 0 6px 16px rgba(0, 168, 204, 0.2);
        background: rgba(255, 255, 255, 1);
    }

    .announcement-date {
        display: inline-block;
        font-size: 0.75rem;
        font-weight: 600;
        color: #fff;
        background: var(--btu-accent);
        padding: 4px 10px;
        border-radius: 20px;
        margin-bottom: 0.5rem;
    }

    .announcement-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: #1a1a1a;
        margin-bottom: 0.5rem;
    }

    .announcement-content {
        font-size: 0.85rem;
        color: #555;
        line-height: 1.5;
        margin-bottom: 0.5rem;
    }

    /* Hero Alanı: Gradyan Geçişli */
    .hero-section {
        background: linear-gradient(135deg, var(--btu-blue) 0%, #0056b3 100%);
        border-radius: 24px;
        border-bottom: 5px solid var(--btu-accent);
    }

    /* Lab Kartları */
    .lab-card {
        border: none;
        border-radius: 20px;
        transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }

    .lab-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 22px rgba(0, 51, 102, 0.09) !important;
    }

    /* Giriş/Kayıt Kartı - Vurgulu */
    .auth-card {
        background: linear-gradient(135deg, rgba(0, 51, 102, 0.05) 0%, rgba(0, 168, 204, 0.05) 100%);
        border: 2px solid var(--btu-accent);
        border-radius: 20px;
        transition: all 0.3s ease;
    }

    .auth-card:hover {
        box-shadow: 0 8px 20px rgba(0, 168, 204, 0.15);
        transform: translateY(-4px);
    }

    /* Giriş/Kayıt Butonları - Daha Büyük ve Vurgulu */
    .auth-buttons .btn {
        font-weight: 700;
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        transition: all 0.3s ease;
    }

    .auth-buttons .btn-primary {
        background: linear-gradient(135deg, #0056b3 0%, var(--btu-accent) 100%);
        border: none;
    }

    .auth-buttons .btn-primary:hover {
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(0, 86, 179, 0.3);
    }

    .auth-buttons .btn-outline-dark {
        border-width: 2px;
        color: #1a1a1a;
    }

    .auth-buttons .btn-outline-dark:hover {
        transform: scale(1.05);
        background-color: #eef7f0;
        border-color: #28a745;
    }

    /* MOBİL RESPONSIVE - TELEFON */
    @media (max-width: 768px) {
        body {
            background-size: 20px 20px;
        }

        .hero-section {
            padding: 2rem !important;
            border-radius: 16px;
        }

        .hero-section h1 {
            font-size: 1.5rem !important;
        }

        .hero-section .lead {
            font-size: 0.9rem;
        }

        .lab-card {
            border-radius: 15px;
        }

        .lab-card:hover {
            transform: translateY(-4px);
        }

        .card {
            margin-bottom: 1rem;
        }

        .btn {
            font-size: 0.9rem;
            padding: 0.6rem 1rem;
        }

        h4 {
            font-size: 1.1rem;
        }

        .announcement-timeline {
            padding-left: 1.5rem;
        }

        .announcement-item::before {
            left: -2.8rem;
            width: 12px;
            height: 12px;
        }

        .announcement-item {
            padding: 0.8rem;
            font-size: 0.85rem;
        }
    }

    @media (max-width: 576px) {
        .hero-section {
            padding: 1.5rem !important;
        }

        .hero-section h1 {
            font-size: 1.3rem !important;
        }

        .hero-section .row {
            flex-direction: column;
        }

        .card-body {
            padding: 1rem !important;
        }

        .badge {
            font-size: 0.7rem;
        }

        h5 {
            font-size: 1rem;
        }

        h6 {
            font-size: 0.85rem;
        }

        .announcement-timeline {
            padding-left: 1.2rem;
        }

        .announcement-item::before {
            left: -2.3rem;
            width: 10px;
            height: 10px;
            box-shadow: none;
        }

        .announcement-item {
            margin-bottom: 1rem;
            padding: 0.7rem;
        }

        .announcement-date {
            font-size: 0.65rem;
            padding: 3px 8px;
        }

        .announcement-title {
            font-size: 0.85rem;
        }

        .announcement-content {
            font-size: 0.8rem;
        }
    }