:root {
    --bg-color: #ffffff;
    --bg-alt: #f8fafc;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --primary: #0f172a;
    --primary-hover: #334155;
    --accent: #2563eb;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg-color: #0b0f19;
    --bg-alt: #111827;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --primary: #f8fafc;
    --primary-hover: #e2e8f0;
    --accent: #3b82f6;
    --border-color: #1f2937;
    --card-bg: #131c2e;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.narrow-container {
    max-width: 800px;
}

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

a:hover {
    text-decoration: underline;
}

/* Header & Navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

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

.logo-text {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-color);
}

.logo-text strong {
    font-weight: 700;
    color: var(--accent);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--accent);
    text-decoration: none;
}

.nav-btn {
    background-color: var(--accent);
    color: #fff !important;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.nav-btn:hover {
    opacity: 0.9;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    width: 30px;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 2px;
}

/* Hero Section */
.hero-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-alt) 100%);
    text-align: center;
}

.hero-container {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-alt);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.hero-section h1 {
    font-size: 2.75rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-section p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff;
}

.btn-primary:hover {
    opacity: 0.9;
    text-decoration: none;
}

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

.btn-secondary:hover {
    background-color: var(--bg-alt);
    text-decoration: none;
}

.btn-full {
    width: 100%;
}

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

.bg-alt {
    background-color: var(--bg-alt);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem auto;
}

.section-header h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

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

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

.feature-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 10px;
}

.feature-box h3 {
    margin-bottom: 0.5rem;
}

.feature-box p {
    color: var(--text-muted);
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    margin-bottom: 1.5rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.about-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.about-card h3 {
    margin-bottom: 1rem;
}

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

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.step-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    border-radius: 10px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 1.25rem auto;
}

.step-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.step-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: var(--shadow);
}

.contact-info-box h3 {
    margin-bottom: 1rem;
}

.contact-info-box p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.email-highlight {
    font-size: 1.2rem;
    font-weight: 700;
}

.small-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.aes-form .form-group {
    margin-bottom: 1.5rem;
}

.aes-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
}

.checkbox-group label {
    font-weight: 400;
    font-size: 0.85rem;
    display: flex;
    gap: 0.5krem;
    align-items: flex-start;
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid #10b981;
    color: #10b981;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #ef4444;
}

/* Legal Pages */
.legal-page {
    padding: 4rem 0;
}

.legal-page h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.legal-page h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.legal-page h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.legal-page p, .legal-page ul {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.legal-page ul {
    padding-left: 1.5rem;
}

/* Footer */
.site-footer {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.footer-col h3, .footer-col h4 {
    margin-bottom: 1rem;
}

.footer-col p, .footer-col li {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    list-style: none;
}

.footer-col a {
    color: var(--text-muted);
}

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

.footer-note {
    font-size: 0.8rem;
    font-style: italic;
    margin-top: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
    z-index: 2000;
    padding: 1.5rem;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cookie-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.cookie-buttons {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

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

    .cookie-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .cookie-buttons {
        width: 100%;
        justify-content: stretch;
    }

    .cookie-buttons .btn {
        flex: 1;
    }
}