/* --- CSS Variables for Theme --- */
:root {
    --primary-color: #062a54;
    --primary-color-light: #0a3d6f;
    --secondary-color: #00a8cc;
    --text-color-light: #f4f4f4;
    --text-color-dark: #333;
    --bg-color-light: #ffffff;
    --bg-color-grey: #f8f9fa;
    --card-shadow: 0 4px 15px rgba(6, 42, 84, 0.1);
    --transition: all 0.3s ease-in-out;
}

/* --- Global Styles & Resets --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

h1,
h2,
h3 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
}

/* --- Header & Navigation --- */
.header {
    background-color: var(--bg-color-light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--secondary-color);
}

.nav-link::after {
    content: '';
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    position: absolute;
    bottom: -5px;
    left: 0;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
    background-color: var(--primary-color);
    color: var(--text-color-light);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2.5rem auto;
    opacity: 0.9;
}

.btn {
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--bg-color-light);
    border: 2px solid var(--secondary-color);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 168, 204, 0.3);
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    z-index: 1;
}

/* --- Features Section --- */
.features-section {
    padding: 80px 0;
    background-color: var(--bg-color-grey);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-color-light);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid #e9ecef;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(6, 42, 84, 0.15);
}

.card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem auto;
    background-color: rgba(6, 42, 84, 0.08);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-color);
}

.card-icon svg {
    width: 35px;
    height: 35px;
}

.card-title {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.card-text {
    color: #666;
    font-size: 0.95rem;
}

/* --- Footer --- */
.footer {
    background-color: var(--primary-color);
    color: var(--text-color-light);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--bg-color-light);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

}
/* --- EN ALTA EKLE: Auth ve Dropdown Stilleri --- */

/* 1. Navbar Profil Dropdown Menüsü */
.user-dropdown {
    position: relative;
    display: inline-block;
    padding-bottom: 5px; /* Fare kaçmasın diye güvenli alan */
}

.user-email {
    font-weight: 600;
    color: var(--secondary-color) !important;
    cursor: pointer;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%; /* Tam altına yapışır */
    background-color: var(--bg-color-light);
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: 8px;
    z-index: 1001;
    border: 1px solid #e9ecef;
}

.dropdown-content a {
    color: var(--text-color-dark);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.dropdown-content a:hover {
    background-color: var(--bg-color-grey);
    color: var(--secondary-color);
}

.user-dropdown:hover .dropdown-content {
    display: block; /* Üzerine gelince aç */
}

/* 2. Yükleniyor (Loading) Ekranı */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color-light);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--secondary-color); /* Senin tema rengin */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}