:root {
    --bg-color: #0b0f19;
    --card-bg: #111827;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text-color: #f3f4f6;
    --text-muted: #9ca3af;
    --border-color: #1f2937;
    --accent: #10b981;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.highlight {
    color: var(--primary);
}

/* Header & Nav */
header {
    background: rgba(11, 15, 25, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.4rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-color);
}

.logo i {
    color: var(--primary);
    font-size: 1.6rem;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-color);
}

.btn-nav {
    background: var(--primary);
    color: white !important;
    padding: 8px 16px;
    border-radius: 6px;
    transition: background 0.3s;
}

.btn-nav:hover {
    background: var(--primary-hover);
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(circle at center, #1e1b4b 0%, var(--bg-color) 70%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 30px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* Butonlar */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

.btn-block {
    width: 100%;
}

/* Genel Başlıklar */
.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 40px;
}

/* Özellikler Grid */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* İnteraktif Simülatör */
.simulator-section {
    padding: 80px 0;
    background: rgba(17, 24, 39, 0.4);
}

.simulator-box {
    max-width: 700px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.simulator-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.simulator-controls select {
    flex: 1;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px;
    border-radius: 8px;
    outline: none;
}

.ai-output-area {
    background: var(--bg-color);
    border: 1px dashed var(--border-color);
    padding: 20px;
    border-radius: 8px;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.placeholder-text {
    color: var(--text-muted);
}

.ai-result {
    text-align: left;
    width: 100%;
}

.ai-result h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

/* Fiyatlandırma */
.pricing {
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 750px;
    margin: 40px auto 0;
}

.price-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 30px;
    position: relative;
    text-align: center;
}

.price-card.popular {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    font-size: 0.75rem;
    border-radius: 20px;
    font-weight: bold;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 20px 0;
    color: var(--text-color);
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
}

.price-card ul {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.price-card ul li {
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 0.95krem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.price-card ul li i {
    color: var(--accent);
}

/* İletişim */
.contact-section {
    padding: 80px 0;
    background: var(--card-bg);
}

.contact-container {
    max-width: 600px;
}

.contact-form {
    margin-top: 30px;
}

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

.contact-form input, .contact-form textarea {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 14px;
    border-radius: 8px;
    color: var(--text-color);
    outline: none;
    transition: border-color 0.3s;
}

.contact-form input:focus, .contact-form textarea:focus {
    border-color: var(--primary);
}

.feedback-msg {
    margin-top: 15px;
    text-align: center;
    font-weight: 500;
}

/* Footer */
footer {
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: color 0.3s;
}

.social-icons a:hover {
    color: var(--primary);
}

@media(max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .nav-links { display: none; }
    .footer-content { flex-direction: column; gap: 15px; }
}