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

html, body {
    height: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #0d1b1b;
    color: #e0e0e0;
    display: flex;
    flex-direction: column;
}

.kapsayici {
    width: 90%;
    max-width: 1200px;
    margin: auto;
    overflow: hidden;
    padding: 0 15px;
}

.ana-icerik {
    flex-grow: 1;
    padding: 30px 0;
}

:root {
    --vurgu-yesil: #00897b;
    --koyu-yesil: #004d40;
    --acik-yesil: #ffc107;
    --karsilama-arkaplan: #004d40;
}

.ust-alan {
    background: #142828;
    color: #fff;
    padding: 15px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.ust-alan h1 {
    font-size: 28px;
    letter-spacing: 1px;
    float: left;
}

.ust-alan h1 span {
    color: var(--vurgu-yesil);
}

.ana-menu ul {
    list-style: none;
    float: right;
}

.ana-menu ul li {
    display: inline-block;
    margin-left: 25px;
}

.ana-menu a {
    color: var(--acik-yesil);
    text-decoration: none;
    font-size: 16px;
    padding: 8px 0;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.ana-menu a:hover, .ana-menu .aktif a {
    color: var(--vurgu-yesil);
    border-bottom: 2px solid var(--vurgu-yesil);
}

#giris-bandi {
    min-height: 250px;
    background: var(--karsilama-arkaplan);
    text-align: center;
    color: #fff;
    margin-bottom: 30px;
    padding-top: 50px;
    text-shadow: 1px 1px 5px rgba(0,0,0,0.9);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    border: 3px solid var(--vurgu-yesil);
}

#giris-bandi::before {
    content: none;
}

#giris-bandi h2, #giris-bandi p {
    position: relative;
    z-index: 10;
}

#giris-bandi h2 {
    font-size: 48px;
    margin-bottom: 15px;
}

.bolum {
    padding: 30px;
    margin-bottom: 30px;
    background: #142828;
    border-radius: 12px;
    box-shadow: 0 6px 15px rgba(0,0,0,0.6);
}

.bolum h2 {
    color: var(--vurgu-yesil);
    border-bottom: 2px solid #284c4c;
    padding-bottom: 10px;
    margin-bottom: 20px;
    font-size: 32px;
}

.bolum h3 {
    color: #bdbdbd;
    margin-bottom: 15px;
    font-size: 24px;
}

.kart-listesi {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
}

.kart {
    flex: 1 1 calc(33.333% - 25px);
    background: #1e3838;
    color: #cfcfcf;
    padding: 20px;
    border: 1px solid #284c4c;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kart:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.8);
    border: 1px solid var(--vurgu-yesil);
}

.kart img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    margin-bottom: 15px;
    border-radius: 6px;
}

.hizli-gezinme {
    background: var(--koyu-yesil);
    padding: 12px;
    margin-bottom: 30px;
    border-radius: 6px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.hizli-gezinme a {
    color: #fff;
    text-decoration: none;
    padding: 0 20px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.hizli-gezinme a:hover {
    color: #ffeb3b;
    animation: nabiz-animasyonu 0.8s infinite;
}

.alt-bilgi {
    background: #1f1f1f;
    color: #9e9e9e;
    text-align: center;
    padding: 25px;
    font-size: 14px;
    width: 100%;
    margin-top: auto;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.5);
    border-top: 2px solid var(--vurgu-yesil);
}

.alt-bilgi small {
    font-size: 1em;
    display: block;
    margin-bottom: 5px;
}

.alt-bilgi a {
    color: var(--vurgu-yesil);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: bold;
}

.alt-bilgi a:hover {
    color: var(--acik-yesil);
    text-decoration: underline;
}

@keyframes gorunme-animasyonu {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes baslik-animasyonu {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes nabiz-animasyonu {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

.bolum, .kart {
    opacity: 0;
    animation: gorunme-animasyonu 0.8s ease-out forwards;
}

.bolum:nth-child(1) { animation-delay: 0.2s; }
.bolum:nth-child(2) { animation-delay: 0.5s; }
.bolum:nth-child(3) { animation-delay: 0.8s; }
.bolum:nth-child(4) { animation-delay: 1.1s; }

.bolum h2 {
    animation: baslik-animasyonu 0.6s ease-out forwards;
}