:root {
    --bg-dark: #0f172a;       /* Çok koyu lacivert/siyah */
    --card-bg: #1e293b;      /* Kart arka planı */
    --primary: #3b82f6;      /* Parlak mavi */
    --success: #10b981;      /* Canlı yeşil */
    --text-main: #f1f5f9;    /* Ana yazı rengi */
    --text-dim: #94a3b8;     /* Yardımcı yazı rengi */
    --border: #334155;       /* Çizgi rengi */
    --input-bg: #0f172a;     /* Input içi */
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Header */
.main-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo a {
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-main);
}

.logo span { color: var(--primary); }

.nav-menu a {
    text-decoration: none;
    color: var(--text-dim);
    margin-left: 20px;
    font-size: 0.9rem;
    transition: 0.3s;
}

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

/* Form ve Kartlar */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.profile-card, .search-box, .form-container, .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 20px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

/* Form Elemanları */
label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 8px;
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 1rem;
    margin-bottom: 15px;
}

input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* Butonlar */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: 0.2s ease;
    font-size: 1rem;
}

.btn-primary { background: var(--primary); color: white; width: 100%; }
.btn-success { background: var(--success); color: white; }
.btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* Bilgi Satırları */
.info-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.info-row strong { color: var(--text-dim); }