:root {
    --bg-color: #0A0A0A;
    --text-color: #F8FAFC;
    --text-muted: #94A3B8;
    --primary: #3B82F6;
    --primary-hover: #2563EB;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.05);
    --nav-bg: rgba(10, 10, 10, 0.8);
    --btn-secondary-bg: rgba(255, 255, 255, 0.05);
    --btn-secondary-hover: rgba(255, 255, 255, 0.1);
    --nav-btn-bg: rgba(255, 255, 255, 0.1);
    --nav-btn-hover: rgba(255, 255, 255, 0.2);
    --nav-btn-color: #FFFFFF;
    --glass-mockup-bg: rgba(255, 255, 255, 0.02);
    --feature-hover: rgba(255, 255, 255, 0.05);
    --footer-link-hover: #FFFFFF;
    --btn-secondary-text: #FFFFFF;
}

[data-theme="light"] {
    --bg-color: #FFFFFF;
    --text-color: #0F172A;
    --text-muted: #64748B;
    --card-bg: #F8FAFC;
    --card-border: #E2E8F0;
    --nav-bg: rgba(255, 255, 255, 0.8);
    --btn-secondary-bg: rgba(0, 0, 0, 0.05);
    --btn-secondary-hover: rgba(0, 0, 0, 0.1);
    --nav-btn-bg: var(--primary);
    --nav-btn-hover: var(--primary-hover);
    --nav-btn-color: #FFFFFF;
    --glass-mockup-bg: rgba(255, 255, 255, 0.5);
    --feature-hover: #F1F5F9;
    --footer-link-hover: #0F172A;
    --btn-secondary-text: #0F172A;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Sticky Header */
.sticky-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    width: 100%;
    transition: transform 0.3s ease-in-out;
}

.header-hidden {
    transform: translateY(-100%);
}

/* Announcement Bar */
.announcement-bar {
    background: linear-gradient(135deg, var(--primary), #A78BFA);
    color: white;
    text-align: center;
    padding: 1rem 1.5rem;
    font-size: 1.05rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
}

.announcement-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 99px;
    font-weight: 700;
    transition: background 0.3s ease;
    animation: pulse 2s infinite;
}

.announcement-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Navbar */
.navbar {
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

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

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
    color: var(--text-color);
}

.theme-toggle:hover {
    background: var(--btn-secondary-bg);
}

[data-theme="light"] .icon-sun {
    display: none;
}

[data-theme="light"] .icon-moon {
    display: block;
}

:root:not([data-theme="light"]) .icon-sun {
    display: block;
}

:root:not([data-theme="light"]) .icon-moon {
    display: none;
}

.nav-btn {
    background: var(--nav-btn-bg);
    color: var(--nav-btn-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.3s ease;
}

.nav-btn:hover {
    background: var(--nav-btn-hover);
}

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.chevron {
    font-size: 0.6rem;
    transition: transform 0.3s ease;
}

.dropdown:hover .chevron {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    min-width: 140px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 200;
    backdrop-filter: blur(20px);
}

@media (hover: hover) {
    .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: left;
    transition: background 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover {
    background: var(--feature-hover);
    color: var(--primary);
}

.dropdown-item:first-child {
    border-radius: 8px 8px 0 0;
}

.dropdown-item:last-child {
    border-radius: 0 0 8px 8px;
}

/* Hero Section */
.hero {
    max-width: 1200px;
    margin: 12rem auto 4rem;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 4rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #60A5FA, #A78BFA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    transition: color 0.3s ease;
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

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

.btn-secondary:hover {
    background: var(--btn-secondary-hover);
}

.store-badge {
    display: inline-block;
    transition: transform 0.3s ease;
}

.store-badge:hover {
    transform: translateY(-2px);
}

.store-badge img {
    height: 52px;
    width: auto;
}

/* Mockup */
.hero-image-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.hero-image-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: var(--primary);
    filter: blur(120px);
    opacity: 0.2;
    z-index: -1;
}

.glass-mockup {
    background: var(--glass-mockup-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: blur(20px);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.mockup-img {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease;
}

.mockup-img:hover {
    transform: scale(1.05) rotate(2deg);
}

/* Features Section */
.features {
    max-width: 1200px;
    margin: 6rem auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

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

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

/* FAQ Section */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
}

.faq-item summary {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item summary:hover {
    background: var(--feature-hover);
}

.faq-content {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Support Section */
.support-content {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(167, 139, 250, 0.1));
    border: 1px solid var(--primary);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.support-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.support-content p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.support-btn {
    margin-top: 1rem;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    align-self: center;
}

/* Footer */
.footer {
    border-top: 1px solid var(--card-border);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color 0.3s ease, color 0.3s ease;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-out forwards;
}

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.3s forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .cta-group {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    .hero {
        margin-top: 16rem;
    }
    .announcement-bar {
        flex-direction: column;
        gap: 0.5rem;
    }
    .nav-content {
        padding: 1rem;
        flex-direction: column;
        gap: 0.8rem;
    }
}