/* --- GENEL STİLLER --- */
:root {
    --primary-color: #3498db;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --light-gray: #f4f7f9;
    --dark-gray: #7f8c8d;
    --text-color: #2c3e50;
    --white-color: #ffffff;
    --border-color: #e0e0e0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--light-gray);
    color: var(--text-color);
    margin: 0;
    padding: 15px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    background-color: var(--white-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 900px;
    text-align: center;
}
@media (max-width: 500px) { .container { padding: 15px; } }

h1, h2 { color: var(--text-color); }
h1 { font-size: 1.8em; margin-bottom: 20px; }
h2 { font-size: 1.4em; margin-top: 25px; margin-bottom: 15px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }

/* --- FORM ELEMANLARI --- */
form { display: flex; flex-direction: column; gap: 15px; }
input, select, button {
    padding: 12px; font-size: 16px; border-radius: 5px;
    border: 1px solid var(--border-color); width: 100%; box-sizing: border-box;
}
button {
    background-color: var(--primary-color); color: var(--white-color);
    border: none; cursor: pointer; font-weight: bold; transition: background-color 0.2s;
}
button:hover { background-color: #2980b9; }
button.danger { background-color: var(--danger-color); }
button.danger:hover { background-color: #c0392b; }

/* --- ALERT MESAJLARI --- */
.alert { padding: 15px; margin-bottom: 20px; border-radius: 5px; font-size: 1em; text-align: left; }
.alert-info { background-color: #eaf6ff; color: #3498db; border: 1px solid #aed6f1; }
.alert-success { background-color: #e8f8f5; color: #1abc9c; border: 1px solid #a3e4d7; }
.alert-danger { background-color: #fdedec; color: #e74c3c; border: 1px solid #f5b7b1; }
.alert strong { font-size: 1.1em; }

/* --- ADMIN PANELİ ÖZEL --- */
.header-admin { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.header-admin .links a { margin-left: 10px; text-decoration: none; color: var(--primary-color); font-weight: 500; }

/* Admin üst linkler için buton stili (a etiketi) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 12px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    border: 1px solid transparent;
    cursor: pointer;
    line-height: 1.1;
    user-select: none;
    width: auto;
}
.btn-primary { background-color: var(--primary-color); color: var(--white-color); }
.btn-primary:hover { background-color: #2980b9; }
.btn-secondary { background-color: var(--dark-gray); color: var(--white-color); }
.btn-secondary:hover { filter: brightness(0.95); }
.btn-success { background-color: var(--success-color); color: var(--white-color); }
.btn-success:hover { filter: brightness(0.95); }
.btn-danger { background-color: var(--danger-color); color: var(--white-color); }
.btn-danger:hover { filter: brightness(0.95); }

/* button elementi .btn ise global width:100% kuralını ez */
button.btn { width: auto; }

.btn:disabled,
.btn.is-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.header-admin .links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}
.header-admin .links a { margin-left: 0; }
/* .btn olan linklerde renk .btn-* tarafından belirlenmeli */
.header-admin .links a.btn { color: var(--white-color); }

.term-quick {
    display: inline-flex;
    gap: 8px;
    align-items: center;
}
.term-quick select {
    width: auto;
    min-width: 200px;
    padding: 10px;
    font-size: 14px;
}

.grid-container { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) { .grid-container { grid-template-columns: 1fr 1fr; } }

.ogrenci-listesi { max-height: 450px; overflow-y: auto; border: 1px solid var(--border-color); border-radius: 5px; padding: 5px; background: #fdfdfd; }

.ogrenci-kart {
    background: var(--white-color); border-bottom: 1px solid var(--border-color);
    padding: 12px; display: flex; justify-content: space-between; align-items: center; gap: 10px;
}
.ogrenci-kart:last-child { border-bottom: none; }
.ogrenci-kart .info { text-align: left; }
.ogrenci-kart .info .ad-soyad { font-weight: 600; font-size: 1em; }
.ogrenci-kart .info .okul-no { font-size: 1em; color: var(--dark-gray); font-weight: 500; }

.action-btn {
    border: none; padding: 6px 14px; border-radius: 20px;
    cursor: pointer; font-size: 12px; font-weight: bold;
    color: var(--white-color); white-space: nowrap;
}
.ekle-btn { background-color: var(--success-color); }
.kaldir-btn { background-color: var(--danger-color); }

/* --- ÖĞRENCİ GİRİŞ EKRANI (index.php) --- */
.index-container { max-width: 500px; }
.admin-link { position: fixed; bottom: 10px; right: 10px; }
.admin-link a { color: var(--dark-gray); text-decoration: none; font-size: 12px; }

/* --- ANKET MODAL STİLLERİ --- */
.anket-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow-y: auto;
    padding: 0;
}

.anket-modal.aktif {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.anket-modal-content {
    background-color: var(--white-color);
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin: auto;
    animation: slideDown 0.3s ease-out;
    display: flex;
    flex-direction: column;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.anket-header {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 20px;
    border-radius: 8px 8px 0 0;
    text-align: center;
    flex-shrink: 0;
}

.anket-header h2 {
    margin: 0 0 8px 0;
    color: var(--white-color);
    border: none;
    padding: 0;
    font-size: 1.3em;
}

.anket-aciklama {
    margin: 10px 0 0 0;
    font-size: 0.95em;
    opacity: 0.95;
}

#anket-form {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.anket-soru-grup {
    margin-bottom: 25px;
    position: relative;
}

.kayit-durumu {
    position: absolute;
    right: 10px;
    top: 35px;
    font-size: 1.2em;
}

.auto-save-info {
    font-size: 0.85em;
    color: var(--success-color);
    margin: 0 0 10px 0;
    text-align: center;
}

.anket-uyari {
    background-color: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 5px;
    padding: 10px;
    margin-top: 12px;
    font-size: 0.85em;
    color: #856404;
    line-height: 1.5;
}

.anket-kapanmaz-uyari {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background-color: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 8px;
    padding: 15px 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
}

.anket-kapanmaz-uyari.goster {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.uyari-icerik {
    text-align: center;
}

.uyari-icon {
    font-size: 2em;
    margin-bottom: 5px;
}

.anket-soru-label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
    font-size: 1em;
    text-align: left;
    line-height: 1.5;
}

.soru-numara {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white-color);
    width: 26px;
    height: 26px;
    line-height: 26px;
    border-radius: 50%;
    text-align: center;
    font-size: 0.85em;
    margin-right: 8px;
}

.anket-soru-grup textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.anket-soru-grup textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
}

/* Radio Button Stilleri */
.soru-siklar {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sik-label {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    user-select: none;
    background-color: #f9f9f9;
}

.sik-label:hover {
    background-color: #f0f0f0;
}

.sik-label input[type="radio"] {
    margin-right: 10px;
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.sik-text {
    flex: 1;
    font-size: 14px;
    color: var(--text-color);
    line-height: 1.4;
}

.sik-label input[type="radio"]:checked + .sik-text {
    font-weight: 600;
    color: var(--primary-color);
}

.sik-label input[type="radio"]:checked {
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

@media (max-width: 600px) {
    .soru-siklar {
        gap: 8px;
    }
    
    .sik-label {
        padding: 8px 10px;
    }
    
    .sik-text {
        font-size: 13px;
    }
}

.anket-footer {
    padding: 15px 20px;
    background-color: #f9f9f9;
    border-radius: 0 0 8px 8px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    text-align: center;
}

.anket-submit-btn {
    background-color: var(--success-color);
    color: var(--white-color);
    border: none;
    padding: 12px 30px;
    font-size: 15px;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.2s ease;
}

.anket-submit-btn:hover:not(:disabled) {
    background-color: #27ae60;
}

.anket-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.anket-basari {
    text-align: center;
    padding: 40px 20px;
}

.basari-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

.anket-basari h3 {
    color: var(--success-color);
    font-size: 1.5em;
    margin: 0 0 10px 0;
}

.anket-basari p {
    color: var(--dark-gray);
    font-size: 1em;
}

/* Mobil Optimizasyonlar */
@media (max-width: 600px) {
    .anket-modal {
        padding: 0;
        align-items: center;
    }
    
    .anket-modal-content {
        width: 95%;
        max-height: 85vh;
        margin: auto;
    }
    
    .anket-header {
        padding: 15px;
    }
    
    .anket-header h2 {
        font-size: 1.2em;
    }
    
    .anket-aciklama {
        font-size: 0.85em;
    }
    
    #anket-form {
        padding: 15px;
    }
    
    .anket-soru-label {
        font-size: 0.9em;
    }
    
    .soru-numara {
        width: 22px;
        height: 22px;
        line-height: 22px;
        font-size: 0.8em;
    }
    
    .anket-soru-grup textarea {
        font-size: 14px;
        min-height: 70px;
    }
    
    .anket-footer {
        padding: 12px 15px;
    }
}