/* ==========================================================================
   Swiss-6 Modern CSS (Strict Contrast & Clear Semantics)
   ========================================================================== */

/* --- CSS DEĞİŞKENLERİ --- */
:root {
    /* Açık Zeminler İçin Kontrast Kuralları (Açık Zemin -> Koyu Font) */
    --bg-body: #f8fafc;
    --bg-content: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;    /* Tamamen koyu */
    --text-secondary: #334155;  /* Koyu gri */
    --text-muted: #64748b;

    /* Koyu Zeminler İçin Kontrast Kuralları (Koyu Zemin -> Açık Font) */
    --bg-header: #020617;       /* Çok koyu zemin */
    --border-header: #1e293b;
    --text-header-primary: #ffffff;  /* Tamamen açık font */
    --text-header-muted: #94a3b8;    /* Açık gri font */
    --bg-selector: #0f172a;
    --border-selector: #1e293b;

    /* Form Elemanları (Açık Zemin -> Koyu Font) */
    --bg-input: #ffffff;
    --text-input: #0f172a;
    --border-input: #cbd5e1;
    --focus-input: #2563eb;

    /* Tablo Başlıkları (Koyu Zemin -> Açık Font) */
    --bg-th: #0f172a;
    --text-th: #f1f5f9;
    --hover-tr: #f1f5f9;
}

/* --- SIFIRLAMA VE TEMEL KURALLAR --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-bottom: 16px;
}

/* --- ANA YAPI --- */
.main-content {
    max-width: 1200px;
    margin: 40px auto;
    padding: 24px;
    background: var(--bg-content);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-height: 500px;
}

/* --- HEADER / NAVİGASYON (Koyu Zemin -> Açık Font) --- */
.main-header {
    background-color: var(--bg-header);
    color: var(--text-header-primary);
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-header);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    color: var(--text-header-primary);
    font-size: 22px;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-menu a {
    color: var(--text-header-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.15s ease;
}

.nav-menu a:hover {
    color: var(--text-header-primary);
}

/* Kurum Seçici */
.org-selector select {
    background-color: var(--bg-selector);
    color: var(--text-header-primary);
    border: 1px solid var(--border-selector);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

.org-selector select:focus {
    border-color: var(--focus-input);
}

/* Kullanıcı Bilgisi & Çıkış */
.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    border-left: 1px solid var(--border-selector);
    padding-left: 16px;
    color: var(--text-header-muted);
}

.logout-btn {
    background-color: #e11d48;
    color: #ffffff !important;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
}

.logout-btn:hover {
    background-color: #be123c;
}

/* --- FORM TASARIMLARI --- */
.form-container {
    max-width: 420px;
    margin: 60px auto;
    padding: 32px;
    background: var(--bg-content);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Metin Alanları (Görünüm sıfırlaması sadece bunlara uygulanır) */
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-input);
    background-color: var(--bg-input);
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    transition: border-color 0.2s ease;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--focus-input);
    box-shadow: 0 0 0 1px var(--focus-input);
}

/* --- CHECKBOX KURALI (Tarayıcı varsayılan tik yapısı korunur) --- */
.form-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--focus-input); /* Modern tarayıcılarda tik kutusunun rengini belirler */
    vertical-align: middle;
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group-checkbox label {
    margin-bottom: 0;
    cursor: pointer;
}

/* Buton */
button[type="submit"] {
    width: 100%;
    padding: 11px;
    background-color: var(--focus-input);
    color: #ffffff; /* Koyu zemin -> Açık font */
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s;
}

button[type="submit"]:hover {
    background-color: #1d4ed8;
}

/* --- TABLOLAR (Koyu Zemin th -> Açık Font, Açık Zemin td -> Koyu Font) --- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-th);
    color: var(--text-th); /* Koyu Zemin -> Açık Font */
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    color: var(--text-primary); /* Açık Zemin -> Koyu Font */
}

tr:hover {
    background-color: var(--hover-tr);
}

/* --- FOOTER --- */
.main-footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-content);
    margin-top: 60px;
}

.alert-info-box {
    background-color: rgba(99, 102, 241, 0.12);
    border-left: 4px solid #6366f1;
    color: currentColor;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
}