/* ===== CSS Variables ===== */
:root {
    --primary: #0f2b46;
    --primary-light: #1a3d5c;
    --accent: #00b4d8;
    --accent-dark: #0096b7;
    --text: #2d3748;
    --text-light: #718096;
    --bg: #f7fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background-color: var(--bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== Navbar ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 43, 70, 0.97);
    backdrop-filter: blur(12px);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.navbar-brand img {
    height: 40px;
    width: auto;
}

.navbar-links {
    display: flex;
    list-style: none;
    gap: 0;
}

.navbar-links li a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    padding: 0.5rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}

.navbar-links li a:hover,
.navbar-links li a.active {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: transparent;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #0d4a6b 100%);
    color: var(--white);
    padding: 100px 2rem 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
}

/* ===== Page Header (Alt Sayfalar) ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 60px 2rem 50px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 2rem;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 2rem;
}

/* ===== Section Title ===== */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.05rem;
}

/* ===== Cards Grid ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    opacity: 0;
    transition: var(--transition);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    font-size: 1.6rem;
    color: var(--white);
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Product Cards ===== */
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-card .product-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--border);
}

.product-card .product-body {
    padding: 1.5rem;
}

.product-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.product-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== Solution Cards ===== */
.solution-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-lg);
}

.solution-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

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

.solutions-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ===== Referanslar ===== */
.ref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.ref-city {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.ref-city h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.ref-city ul {
    list-style: none;
}

.ref-city ul li {
    padding: 0.4rem 0;
    color: var(--text-light);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ref-city ul li:last-child {
    border-bottom: none;
}

.ref-city .badge {
    background: var(--accent);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 20px;
    min-width: 28px;
    text-align: center;
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.contact-info-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.contact-info-box h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-item-text strong {
    display: block;
    color: var(--primary);
    font-size: 0.85rem;
    margin-bottom: 2px;
}

.contact-item-text span {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===== Form ===== */
.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: inherit;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 180, 216, 0.4);
}

/* ===== Map ===== */
.map-container {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.map-container iframe {
    width: 100%;
    height: 350px;
    border: none;
    display: block;
}

/* ===== Info Section (Ana Sayfa Alt) ===== */
.info-section {
    background: var(--white);
    padding: 60px 2rem;
}

.info-section .container {
    padding-top: 0;
    padding-bottom: 0;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 60px 2rem;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    padding: 2rem;
    font-size: 0.9rem;
}

.footer a {
    color: var(--accent);
}

.footer a:hover {
    color: var(--white);
}

/* ===== About Page ===== */
.about-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text);
}

.about-content p {
    margin-bottom: 1.2rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
    }

    .navbar-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--primary);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    }

    .navbar-links.open {
        display: flex;
    }

    .navbar-links li a {
        padding: 0.8rem 1rem;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 60px 1.5rem 50px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .page-header {
        padding: 40px 1.5rem 35px;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .container, .container-narrow {
        padding: 40px 1.5rem;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .ref-grid {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.7rem;
    }

    .navbar-brand {
        font-size: 1.1rem;
    }
}