:root {
    --primary-hover: #4338ca;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --primary: #6366f1;
    --dark: #0f172a;
    --glass: rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body {
    background: var(--bg-color);
    background-image: radial-gradient(circle at top right, #e0e7ff, transparent 40%), radial-gradient(circle at bottom left, #c7d2fe, transparent 40%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.portal-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    padding: 40px 30px;
    text-align: center;
}

.logo-alan h1 {
    font-size: 28px;
    color: var(--text-main);
    margin-bottom: 5px;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.logo-alan span { color: white; background: var(--primary); padding: 2px 8px; border-radius: 6px; }
.logo-alan p { color: var(--text-muted); font-size: 14px; margin-bottom: 30px; }

.form-group { text-align: left; margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 700; color: var(--text-main); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }

.form-control {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.form-control:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15); }

.isletme-no-kutu { position: relative; }
.isletme-no-kutu::before {
    content: '#'; position: absolute; left: 14px; top: 14px; font-weight: bold; color: var(--text-muted); font-size: 15px;
}
.isletme-no-kutu input { padding-left: 30px; font-weight: bold; letter-spacing: 1px; }

.btn-login {
    width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 15px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    margin-top: 10px;
}
.btn-login:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3); }

.footer-text { text-align: center; padding: 20px; font-size: 13px; color: var(--text-muted); }
.main-nav { display: flex; justify-content: space-between; padding: 20px 10%; background: #fff; border-bottom: 1px solid var(--border); }
.btn-primary { background: var(--primary); color: white; border: none; padding: 15px 40px; border-radius: 8px; font-size: 18px; cursor: pointer; }

/* Premium Header ve Navigasyon */
.main-nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 10%; background: #ffffff; border-bottom: 1px solid #e2e8f0;
    position: sticky; top: 0; z-index: 999;
}
.btn-portal {
    background: var(--dark); color: white; padding: 12px 25px; border-radius: 50px;
    text-decoration: none; font-weight: 700; transition: 0.3s;
}
.btn-portal:hover { transform: scale(1.05); background: var(--primary); }

/* Profesyonel Duyuru Bandı */
.duyuru-bandi {
    background: #4f46e5; color: white; padding: 10px; text-align: center;
    font-size: 14px; letter-spacing: 0.5px; border-bottom: 3px solid #312e81;
}

/* Hero Section (İkiye Ayrılmış) */
.hero { padding: 100px 10%; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px; background: #f8fafc; }
.hero-left h1 { font-size: 56px; line-height: 1.1; margin-bottom: 20px; }
.hero-right { background: white; padding: 40px; border-radius: 24px; box-shadow: 0 20px 50px rgba(0,0,0,0.05); }

/* Fiyatlandırma Kartları */
.price-container { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding: 50px 10%; }
.card { 
    padding: 40px; border-radius: 20px; background: #fff; border: 1px solid #e2e8f0;
    transition: 0.4s; position: relative; overflow: hidden;
}
.card:hover { border-color: var(--primary); box-shadow: 0 20px 30px rgba(99, 102, 241, 0.15); }
.popular { border: 2px solid var(--primary); }
.badge { position: absolute; top: 0; right: 0; background: var(--primary); color: white; padding: 5px 15px; border-bottom-left-radius: 10px; font-size: 12px; }