:root {
    --light-bg: #f8f9fa;
    --light-text: #212529;
    --light-card-bg: #ffffff;
    --light-border: #dee2e6;
    --light-primary: #0d6efd;
    --light-primary-hover: #0b5ed7;
    --light-secondary: #6c757d;
    --light-secondary-hover: #5c636a;
    --light-logo: #000;

    --dark-bg: #0A192F;
    --dark-text: #cdd6f4;
    --dark-card-bg: #1E293B;
    --dark-border: #334155;
    --dark-primary: #64FFDA;
    --dark-primary-hover: #52d6b8;
    --dark-secondary: #8892b0;
    --dark-secondary-hover: #a8b2d1;
    --dark-logo: #64FFDA;

    --bg-color: var(--light-bg);
    --text-color: var(--light-text);
    --card-bg-color: var(--light-card-bg);
    --border-color: var(--light-border);
    --primary-color: var(--light-primary);
    --primary-hover-color: var(--light-primary-hover);
    --secondary-color: var(--light-secondary);
    --secondary-hover-color: var(--light-secondary-hover);
    --logo-color: var(--light-logo);

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --border-radius: 8px;
    --transition-speed: 0.3s ease;
}

.dark-theme {
    --bg-color: var(--dark-bg);
    --text-color: var(--dark-text);
    --card-bg-color: var(--dark-card-bg);
    --border-color: var(--dark-border);
    --primary-color: var(--dark-primary);
    --primary-hover-color: var(--dark-primary-hover);
    --secondary-color: var(--dark-secondary);
    --secondary-hover-color: var(--dark-secondary-hover);
    --logo-color: var(--dark-logo);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

/* Header */
.main-header {
    background-color: var(--card-bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--logo-color);
    text-decoration: none;
}
.dark-theme .logo { color: var(--dark-primary); }

.main-nav ul {
    list-style: none;
    display: flex;
}

.main-nav li {
    margin-left: 20px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color var(--transition-speed);
}

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

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

.theme-toggle-btn, .mobile-menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    margin-left: 15px;
    padding: 5px;
}
.theme-toggle-btn svg, .mobile-menu-btn svg {
    display: block;
}

.mobile-menu-btn {
    display: none;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border-color: var(--primary-color);
}
.dark-theme .btn-primary {
    color: var(--dark-bg);
}

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

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

.btn-secondary:hover {
    background-color: var(--secondary-color);
    color: var(--card-bg-color);
}
.dark-theme .btn-secondary:hover { background-color: var(--dark-secondary); color: var(--dark-bg);}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
    text-align: center;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--secondary-color);
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

.hero-actions .btn {
    margin: 0 10px;
}

/* Sections */
section {
    padding: 60px 0;
}
.page-header {
    background-color: var(--card-bg-color);
    padding: 40px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}
.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

/* Features Overview */
.features-overview h2 {
    text-align: center;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.dark-theme .feature-card:hover {
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.feature-card svg {
    margin-bottom: 1rem;
    color: var(--primary-color);
}
.dark-theme .feature-card svg { color: var(--dark-primary); }

.feature-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

/* Success Stories */
.success-stories {
    background-color: var(--card-bg-color);
}
.success-stories h2 {
    text-align: center;
    margin-bottom: 40px;
}
.story-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.story-card {
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: var(--border-radius);
}

.story-author {
    display: flex;
    align-items: center;
    margin-top: 20px;
}
.story-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
    object-fit: cover;
}

/* CTA Section */
.cta-section {
    background-color: var(--primary-color);
    color: var(--dark-bg);
    text-align: center;
    padding: 60px 20px;
}
.dark-theme .cta-section {
    background-color: var(--dark-card-bg);
    color: var(--dark-text);
}
.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}
.cta-section .btn-primary {
    background-color: var(--light-bg);
    color: var(--light-text);
}
.dark-theme .cta-section .btn-primary {
    background-color: var(--dark-primary);
    color: var(--dark-bg);
}
.cta-section .btn-primary:hover {
    background-color: #fff;
}
.dark-theme .cta-section .btn-primary:hover {
    background-color: var(--dark-primary-hover);
}


/* Footer */
.main-footer {
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    padding-bottom: 40px;
}
.footer-column h4 {
    margin-bottom: 1rem;
}
.footer-column ul {
    list-style: none;
}
.footer-column li {
    margin-bottom: 10px;
}
.footer-column a {
    text-decoration: none;
    color: var(--secondary-color);
    transition: color var(--transition-speed);
}
.footer-column a:hover {
    color: var(--primary-color);
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.form-check {
    display: flex;
    align-items: center;
}
.form-check input {
    width: auto;
    margin-right: 10px;
}
.form-check label {
    margin-bottom: 0;
}
.form-check a {
    color: var(--primary-color);
    text-decoration: none;
}
.form-check a:hover {
    text-decoration: underline;
}

/* Register Page */
.register-section {
    padding: 80px 0;
}
.register-container {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--card-bg-color);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.register-container h2 {
    text-align: center;
    margin-bottom: 1rem;
}
.register-container p {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--secondary-color);
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: flex-start;
}
.contact-details {
    list-style: none;
}
.contact-details li {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}
.contact-details svg {
    margin-right: 15px;
    color: var(--primary-color);
}
.dark-theme .contact-details svg { color: var(--dark-primary); }

/* About Page */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: center;
}
.team-member-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
}
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto;
}
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--border-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}
.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}
.timeline-item:nth-child(odd) {
    left: 0;
}
.timeline-item:nth-child(even) {
    left: 50%;
}
.timeline-item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    right: -8px;
    background-color: var(--card-bg-color);
    border: 2px solid var(--primary-color);
    top: 25px;
    border-radius: 50%;
    z-index: 1;
}
.dark-theme .timeline-item::after { border-color: var(--dark-primary); }
.timeline-item:nth-child(even)::after {
    left: -8px;
}
.timeline-content {
    padding: 20px;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

/* Features Detail Page */
.feature-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 60px;
}
.feature-item.reverse {
    grid-template-columns: 1fr 1fr;
}
.feature-item.reverse .feature-text { order: 2; }
.feature-item.reverse .feature-image { order: 1; }
.feature-item img {
    max-width: 100%;
    border-radius: var(--border-radius);
}
.feature-text ul {
    list-style-position: inside;
    margin-top: 1rem;
}
.feature-text li {
    margin-bottom: 0.5rem;
}

/* FAQ Page */
.accordion-item {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}
.accordion-header {
    width: 100%;
    background: none;
    border: none;
    padding: 20px;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
}
.accordion-header svg {
    transition: transform var(--transition-speed);
}
.accordion-item.active .accordion-header svg {
    transform: rotate(180deg);
}
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed), padding var(--transition-speed);
}
.accordion-content p {
    padding: 0 20px 20px;
}

/* Legal Content */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}
.legal-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    transition: bottom 0.5s ease;
}
.cookie-banner.show {
    bottom: 0;
}
.cookie-banner p {
    margin: 0;
    margin-right: 20px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .feature-item, .feature-item.reverse {
        grid-template-columns: 1fr;
    }
    .feature-item.reverse .feature-text { order: 1; }
    .feature-item.reverse .feature-image { order: 2; }
    .feature-image { margin-top: 20px; }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--card-bg-color);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
    }
    .main-nav.active {
        display: flex;
    }
    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }
    .main-nav li {
        margin: 0;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    .main-nav a {
        display: block;
        padding: 15px;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .timeline::after {
        left: 20px;
    }
    .timeline-item, .timeline-item:nth-child(even) {
        width: 100%;
        padding-left: 60px;
        padding-right: 0;
        left: 0;
    }
    .timeline-item::after, .timeline-item:nth-child(even)::after {
        left: 12px;
    }
    .story-grid {
        grid-template-columns: 1fr;
    }
}