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

:root {
    /* Dark Theme Colors - Matching App */
    --primary: #90CAF9;
    --primary-dark: #64B5F6;
    --primary-light: #BBDEFB;
    --secondary: #03DAC6;
    --background: #121212;
    --surface: #1E1E1E;
    --on-surface: #FFFFFF;
    --on-surface-variant: rgba(255, 255, 255, 0.6);
    --divider: rgba(255, 255, 255, 0.12);
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --elevation-1: 0px 1px 3px rgba(0, 0, 0, 0.3), 0px 1px 2px rgba(0, 0, 0, 0.4);
    --elevation-2: 0px 3px 6px rgba(0, 0, 0, 0.4), 0px 3px 6px rgba(0, 0, 0, 0.5);
    --elevation-4: 0px 10px 20px rgba(0, 0, 0, 0.5), 0px 6px 6px rgba(0, 0, 0, 0.6);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--on-surface);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    background: var(--surface);
    box-shadow: var(--elevation-1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--divider);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-img {
    width: 40px;
    height: 40px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 500;
    color: var(--primary);
    margin: 0;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav a {
    color: var(--on-surface);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Hero Section */
.hero {
    position: relative;
    color: var(--on-surface);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('images/hero.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(2px);
    transform: scale(1.1);
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(100, 181, 246, 0.8) 0%, rgba(144, 202, 249, 0.8) 100%);
    z-index: 1;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: var(--surface);
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.btn-secondary {
    background: transparent;
    color: var(--on-surface);
    border: 2px solid var(--on-surface);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-download {
    background: var(--surface);
    color: var(--on-surface);
    box-shadow: var(--elevation-2);
}

.btn-download:hover {
    box-shadow: var(--elevation-4);
    transform: translateY(-2px);
}

.btn-download svg {
    width: 20px;
    height: 20px;
}

/* Sections */
section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--on-surface);
}

/* Features */
.features {
    background: var(--background);
}

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

.feature-card {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-1);
    transition: all 0.2s ease;
    border: 1px solid var(--divider);
}

.feature-card:hover {
    box-shadow: var(--elevation-2);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.feature-card p {
    color: var(--on-surface-variant);
}

/* Screenshots */
.screenshots {
    background: var(--background);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.screenshot-item {
    text-align: center;
}

.screenshot-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-2);
    margin-bottom: var(--spacing-md);
    transition: transform 0.2s ease;
    border: 1px solid var(--divider);
}

.screenshot-img:hover {
    transform: scale(1.02);
    border-color: var(--primary);
}

.screenshot-item h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.screenshot-item p {
    color: var(--on-surface-variant);
}

/* Download */
.download {
    position: relative;
    color: var(--on-surface);
    text-align: center;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('images/download.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(2px);
    transform: scale(1.1);
    z-index: 0;
}

.download::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(100, 181, 246, 0.8) 0%, rgba(144, 202, 249, 0.8) 100%);
    z-index: 1;
}

.download .container {
    position: relative;
    z-index: 2;
}

.download-subtitle {
    font-size: 18px;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.download-version {
    margin-top: var(--spacing-lg);
    opacity: 0.8;
    font-size: 14px;
}

/* About */
.about {
    background: var(--background);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    margin-bottom: var(--spacing-md);
    color: var(--on-surface-variant);
    font-size: 16px;
}

.about-privacy,
.about-features,
.about-tech {
    margin-top: var(--spacing-xl);
}

.about-privacy {
    background: rgba(144, 202, 249, 0.1);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.about-privacy h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.about-privacy p {
    margin-bottom: var(--spacing-md);
}

.about-privacy ul {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.about-privacy ul ul {
    margin-top: var(--spacing-sm);
    margin-left: var(--spacing-lg);
}

.about-features h3,
.about-tech h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.about-features ul,
.about-tech ul {
    list-style: none;
    padding-left: 0;
}

.about-features li,
.about-tech li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--on-surface-variant);
}

.about-features li::before,
.about-tech li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--divider);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer p {
    color: var(--on-surface-variant);
    font-size: 14px;
}

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

.footer a:hover {
    text-decoration: underline;
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(4px);
}

.lightbox-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.lightbox-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-4);
    margin-bottom: var(--spacing-lg);
}

.lightbox-info {
    text-align: center;
    color: var(--on-surface);
    max-width: 800px;
    padding: 0 var(--spacing-lg);
}

.lightbox-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.lightbox-info p {
    font-size: 18px;
    color: var(--on-surface-variant);
    line-height: 1.6;
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 3;
    background: var(--surface);
    color: var(--on-surface);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    font-size: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-2);
}

.lightbox-close:hover {
    background: var(--primary);
    color: var(--on-primary);
    transform: scale(1.1);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    background: var(--surface);
    color: var(--on-surface);
    border: none;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    font-size: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-2);
}

.lightbox-nav:hover {
    background: var(--primary);
    color: var(--on-primary);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: var(--spacing-lg);
}

.lightbox-next {
    right: var(--spacing-lg);
}

.screenshot-item {
    cursor: pointer;
    transition: transform 0.2s ease;
}

.screenshot-item:hover {
    transform: translateY(-4px);
}

.screenshot-img {
    transition: transform 0.2s ease;
}

.screenshot-item:hover .screenshot-img {
    transform: scale(1.02);
}

/* Feedback Section */
.feedback {
    padding: var(--spacing-3xl) 0;
    background: var(--background);
}

.feedback-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--on-surface-variant);
    margin-bottom: var(--spacing-2xl);
}

.feedback-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.feedback-info h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.feedback-info p {
    color: var(--on-surface-variant);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.feedback-types {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feedback-type-item {
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--divider);
    transition: all 0.2s ease;
}

.feedback-type-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.feedback-type-item svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.feedback-type-item h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-xs);
    color: var(--on-surface);
}

.feedback-type-item p {
    font-size: 14px;
    color: var(--on-surface-variant);
    margin: 0;
}

.feedback-form {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-2);
    border: 1px solid var(--divider);
}

.feedback-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.feedback-form label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--on-surface);
    font-weight: 500;
    font-size: 14px;
}

.feedback-form input,
.feedback-form select,
.feedback-form textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--background);
    border: 1px solid var(--divider);
    border-radius: var(--radius-sm);
    color: var(--on-surface);
    font-family: inherit;
    font-size: 16px;
    transition: all 0.2s ease;
}

.feedback-form input:focus,
.feedback-form select:focus,
.feedback-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(144, 202, 249, 0.2);
}

.feedback-form input::placeholder,
.feedback-form textarea::placeholder {
    color: var(--on-surface-variant);
}

.feedback-form textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.feedback-form select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2390CAF9' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    padding-right: var(--spacing-2xl);
}

.feedback-form .form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.feedback-status-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

.feedback-status-message.success {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.feedback-status-message.error {
    background: rgba(244, 67, 54, 0.2);
    color: #F44336;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .nav {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feedback-content {
        grid-template-columns: 1fr;
    }
    
    .feedback-form {
        padding: var(--spacing-lg);
    }
    
    .feedback-form .form-actions {
        flex-direction: column;
    }
    
    .feedback-form .form-actions .btn {
        width: 100%;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .lightbox-content {
        padding: var(--spacing-md);
    }
    
    .lightbox-image {
        max-height: 70vh;
    }
    
    .lightbox-info h3 {
        font-size: 24px;
    }
    
    .lightbox-info p {
        font-size: 16px;
    }
    
    .lightbox-close {
        top: var(--spacing-md);
        right: var(--spacing-md);
        width: 40px;
        height: 40px;
        font-size: 28px;
    }
    
    .lightbox-nav {
        width: 48px;
        height: 48px;
        font-size: 28px;
    }
    
    .lightbox-prev {
        left: var(--spacing-sm);
    }
    
    .lightbox-next {
        right: var(--spacing-sm);
    }
}