/* =================================================================
   1. Genel Ayarlar ve Değişkenler
   ================================================================= */
:root {
    --primary-color: #4a69bd;       /* Ana Renk (Mavi tonu) */
    --secondary-color: #1e3799;    /* İkincil Renk (Koyu Mavi) */
    --sidebar-bg: #2c3e50;         /* Sol Menü Arka Planı */
    --sidebar-text: #ecf0f1;       /* Sol Menü Yazı Rengi */
    --body-bg: #f5f7fa;            /* Sayfa Arka Plan Rengi */
    --card-bg: #ffffff;            /* Kart ve Form Arka Planı */
    --text-color: #34495e;         /* Ana Yazı Rengi */
    --text-light: #7f8c8d;         /* Açık Yazı Rengi */
    --border-color: #dfe4ea;       /* Kenarlık Rengi */
    --success-color: #2ecc71;       /* Başarı Rengi */
    --error-color: #e74c3c;         /* Hata Rengi */
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08); /* Gölgelendirme */
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--body-bg);
    color: var(--text-color);
}
body.admin-body {
    display: flex; /* Ana layout için */
}


/* =================================================================
   2. Giriş ve Kayıt Sayfası Tasarımı
   ================================================================= */
body.login-page-body {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 20px;
}

.login-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-box h2 {
    margin-bottom: 25px;
    color: var(--sidebar-bg);
}

.login-box .input-group {
    margin-bottom: 20px;
    text-align: left;
}

.login-box .input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-box .input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.login-box .input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 105, 189, 0.2);
}

.login-box button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.login-box button:hover {
    transform: translateY(-2px);
}

.login-box .login-link {
    margin-top: 20px;
    color: var(--text-light);
}

.login-box .login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* =================================================================
   3. Ana Panel Layout ve Sol Menü (Sidebar)
   ================================================================= */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    height: 100vh;
    padding: 25px;
    box-sizing: border-box;
    position: fixed;
    left: 0;
    top: 0;
    transition: transform 0.3s ease;
    z-index: 1001;
}

.sidebar h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.5em;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 20px;
}

.sidebar ul {
    list-style: none;
}

.sidebar ul li a {
    color: var(--sidebar-text);
    text-decoration: none;
    display: block;
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: background-color 0.3s, padding-left 0.3s;
}

.sidebar ul li a:hover {
    background-color: #34495e;
    padding-left: 25px;
}

.main-content {
    margin-left: 260px;
    flex-grow: 1;
    padding: 40px;
    transition: margin-left 0.3s ease;
}

.main-content h1 {
    font-size: 2em;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 30px;
}

/* =================================================================
   4. Formlar ve Tablolar
   ================================================================= */
form { background: var(--card-bg); padding: 25px; border-radius: 8px; box-shadow: var(--shadow); margin-top: 20px; }
form label { display: block; margin-bottom: 8px; font-weight: 600; }
form input[type="text"], form input[type="password"], form input[type="number"], form input[type="date"], form input[type="tel"], form input[type="email"], form input[type="file"], form textarea { width: 100%; padding: 12px; margin-bottom: 20px; border: 1px solid var(--border-color); border-radius: 5px; box-sizing: border-box; }
form button { padding: 12px 25px; background-color: var(--primary-color); color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; transition: background-color 0.3s; }
form button:hover { background-color: var(--secondary-color); }

.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; box-shadow: var(--shadow); background: var(--card-bg); border-radius: 8px; overflow: hidden; }
th, td { padding: 15px; border-bottom: 1px solid var(--border-color); text-align: left; vertical-align: middle; }
thead th { background-color: #f8f9fa; font-weight: 600; }
tbody tr:hover { background-color: #f1f3f5; }
table a { color: var(--primary-color); text-decoration: none; font-weight: 600; }
table a:hover { text-decoration: underline; }
img.thumbnail { max-width: 120px; height: auto; border-radius: 5px; }

/* =================================================================
   5. Özel Bileşenler (Dashboard, Mesajlar, Resim Galerisi)
   ================================================================= */
.dashboard-menu { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.menu-item { background: var(--card-bg); padding: 30px; border-radius: 8px; box-shadow: var(--shadow); text-align: center; color: var(--text-color); text-decoration: none; font-size: 1.2em; font-weight: 600; transition: transform 0.3s, box-shadow 0.3s; }
.menu-item:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.12); color: var(--primary-color); }

.error, .success { padding: 15px; border-radius: 5px; margin-bottom: 20px; text-align: center; color: #fff; }
.error { background-color: var(--error-color); }
.success { background-color: var(--success-color); }

.extra-images-section { margin-top: 40px; background: var(--card-bg); padding: 25px; border-radius: 8px; box-shadow: var(--shadow); }
.project-gallery { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 20px; }
.gallery-item { position: relative; border: 1px solid var(--border-color); padding: 5px; border-radius: 5px; }
.gallery-item img { height: 120px; display: block; }
.gallery-item .delete-btn { position: absolute; top: -10px; right: -10px; background: var(--error-color); color: white; border-radius: 50%; width: 25px; height: 25px; text-align: center; line-height: 25px; text-decoration: none; font-weight: bold; box-shadow: 0 2px 5px rgba(0,0,0,0.2); transition: transform 0.2s; }
.gallery-item .delete-btn:hover { transform: scale(1.1); }


/* =================================================================
   6. Mobil Uyum (Responsive)
   ================================================================= */
.menu-toggle { display: none; position: fixed; top: 15px; left: 15px; z-index: 1002; background: var(--sidebar-bg); color: white; border: none; padding: 10px 15px; border-radius: 5px; cursor: pointer; box-shadow: 0 2px 5px rgba(0,0,0,0.2); }

@media (max-width: 992px) {
    .sidebar { transform: translateX(-260px); }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .sidebar.active { transform: translateX(0); }
}

@media (max-width: 576px) {
    .main-content { padding: 20px; }
    .main-content h1 { font-size: 1.8em; }
    form { padding: 15px; }
    .dashboard-menu { grid-template-columns: 1fr; }
}