@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-lighter: #f1f5f9;
    --text-main: #334155;
    --text-heading: #0f172a;
    --text-muted: #64748b;
    --primary: #0284c7; /* Professional Blue */
    --primary-hover: #0369a1;
    --secondary: #0ea5e9;
    --accent: #f59e0b; /* Attention grabbing */
    --border-light: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.2s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px; /* Normal text 16px */
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

small, .text-sm {
    font-size: 14px; /* Small text 14px */
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; letter-spacing: -0.025em; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
    font-size: 16px;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navbar */
header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo i {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links li {
    position: relative;
    padding: 10px 0;
}

.nav-links a {
    color: var(--text-heading);
    font-weight: 600;
    font-size: 16px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
}

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: 500px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
}

.nav-links li:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: flex-start;
    padding: 0.8rem;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
}

.dropdown-item:hover {
    background: var(--bg-lighter);
}

.dropdown-item i {
    font-size: 1.4rem; 
    color: var(--primary); 
    margin-right: 12px;
    margin-top: 2px;
}

.dropdown-item-content h4 {
    font-size: 16px;
    margin-bottom: 0.2rem;
    color: var(--text-heading);
}
.dropdown-item-content p {
    font-size: 14px;
    margin-bottom: 0;
    color: var(--text-muted);
}

.badge {
    background: var(--accent);
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
    font-weight: 700;
    text-transform: uppercase;
}

/* Buttons */
.auth-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
    border: 1px solid transparent;
}

.btn-outline {
    background: transparent;
    border-color: var(--border-light);
    color: var(--text-heading);
}

.btn-outline:hover {
    border-color: var(--text-heading);
    background: var(--bg-lighter);
}

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

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

/* Sections & Layouts */
section {
    padding: 5rem 0;
}

.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    position: relative;
    text-align: center;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    padding: 6rem 0;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.glass-card, .corporate-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 2.5rem;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.corporate-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.corporate-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.corporate-card.popular::before {
    content: "En Popüler";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    font-size: 14px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
}

.card-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-heading);
    margin: 1.5rem 0;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 5px;
}
.card-price span {
    font-size: 16px;
    color: var(--text-muted);
}

.feature-list {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.feature-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
}
.feature-list li:last-child {
    border-bottom: none;
}
.feature-list li i {
    color: var(--primary);
    font-size: 14px;
}

/* Footer */
footer {
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--text-heading);
    margin-bottom: 1.5rem;
    font-size: 18px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 16px;
}

.footer-links a:hover {
    color: var(--primary);
    text-decoration: underline;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border-light);
    padding-top: 2rem;
}