/* ==================== */
/* CSS Variables & Reset */
/* ==================== */

:root {
    /* Colors - Matching Onelist App */
    --color-bg: #F5F1ED;
    --color-bg-secondary: #EBE6E0;
    --color-surface: #FFFFFF;
    --color-surface-hover: #FAFAF8;
    --color-primary: #6B5D4F;
    --color-primary-hover: #5A4D40;
    --color-primary-light: #8B7D6F;
    --color-accent: #9B8B7E;
    --color-text: #2C2419;
    --color-text-secondary: #6B5D4F;
    --color-text-muted: #9B8B7E;
    --color-border: #D4CEC5;
    --color-border-light: #E8E3DC;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Layout */
    --container-width: 1200px;
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== */
/* Utility Classes */
/* ==================== */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== */
/* Navigation */
/* ==================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(245, 241, 237, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* ==================== */
/* Hero Section */
/* ==================== */

.hero {
    padding: calc(70px + var(--spacing-4xl)) 0 var(--spacing-4xl);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out;
}

.hero-badge svg {
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
    animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s backwards;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* ==================== */
/* App Window Mockup */
/* ==================== */

.app-window {
    width: 100%;
    max-width: 500px;
    background-color: var(--color-surface);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.window-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.window-dots {
    display: flex;
    gap: var(--spacing-xs);
}

.window-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-border);
}

.window-dots span:nth-child(1) {
    background-color: #ED6A5E;
}

.window-dots span:nth-child(2) {
    background-color: #F4BF4F;
}

.window-dots span:nth-child(3) {
    background-color: #61C554;
}

.window-title {
    flex: 1;
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-right: 60px;
}

.window-content {
    padding: var(--spacing-lg);
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.8;
    background-color: var(--color-surface);
}

.editor-line {
    display: flex;
    gap: var(--spacing-md);
    padding: 2px 0;
}

.line-number {
    color: var(--color-text-muted);
    user-select: none;
    min-width: 20px;
    text-align: right;
}

.line-text {
    color: var(--color-text);
}

.date-text {
    color: var(--color-primary);
    font-weight: 500;
}

.tag-text {
    color: var(--color-accent);
    font-weight: 500;
}

.cursor-line .cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--color-primary);
    animation: blink 1s infinite;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

/* ==================== */
/* Buttons */
/* ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-full {
    width: 100%;
}

/* ==================== */
/* Sections */
/* ==================== */

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==================== */
/* Features Section */
/* ==================== */

.features {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-surface);
}

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

.feature-card {
    padding: var(--spacing-xl);
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border-radius: var(--border-radius-md);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==================== */
/* Options Section */
/* ==================== */

.options {
    padding: var(--spacing-4xl) 0;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 900px;
    margin: 0 auto;
}

.option-card {
    position: relative;
    padding: var(--spacing-2xl);
    background-color: var(--color-surface);
    border-radius: var(--border-radius-xl);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.option-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.option-cloud {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.option-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
}

.option-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.option-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.option-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.option-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.option-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
}

.option-features li svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ==================== */
/* Footer */
/* ==================== */

.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column a {
    display: block;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ==================== */
/* Animations */
/* ==================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== */
/* Responsive Design */
/* ==================== */

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero {
        text-align: center;
        padding-top: calc(70px + var(--spacing-3xl));
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: var(--font-size-xs);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .app-window {
        max-width: 100%;
    }

    .window-content {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .nav-content {
        height: 60px;
    }

    .logo {
        font-size: var(--font-size-lg);
    }
}