/* ========================================
   Zephyr RSS Reader - Landing Page Styles
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Vibrant Sophisticated Palette */
    --color-bg: #FCFBFF;
    --color-bg-alt: #F5F3FF;
    --color-surface: #FFFFFF;
    --color-text: #1E1B4B;
    --color-text-muted: #4B5563;
    --color-text-light: #9CA3AF;
    --color-accent: #4F46E5;
    --color-accent-light: #8B5CF6;
    --color-accent-dark: #3730A3;
    --color-accent-subtle: rgba(79, 70, 229, 0.05);
    --color-highlight: #EC4899;
    --color-border: rgba(79, 70, 229, 0.08);
    --color-shadow: rgba(79, 70, 229, 0.04);
    
    /* Typography */
    --font-display: 'Lora', serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 50%, var(--color-highlight) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

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

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text-light);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: white;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(253, 251, 247, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
}

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

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.nav-links .nav-cta {
    padding: 0.625rem 1.25rem;
    background: var(--color-accent);
    color: white;
    border-radius: var(--radius-full);
}

.nav-links .nav-cta:hover {
    background: var(--color-accent-light);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: var(--space-md);
    z-index: 999;
}

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

.mobile-menu a {
    padding: var(--space-md);
    font-size: 1rem;
    color: var(--color-text);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mobile-menu a:hover {
    background: var(--color-bg-alt);
}

.mobile-menu .nav-cta {
    background: var(--color-accent);
    color: white;
    text-align: center;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(80px + var(--space-3xl)) var(--container-padding) var(--space-3xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
    bottom: 100px;
    left: -100px;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
    margin-bottom: var(--space-3xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.badge-icon {
    color: var(--color-accent);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
}

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

.hero-image {
    position: relative;
    z-index: 1;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: auto;
    padding: 12px;
    background: linear-gradient(145deg, #1c1917 0%, #3a3a3a 100%);
    border-radius: 44px;
    box-shadow: 
        0 40px 80px -20px rgba(0, 0, 0, 0.25),
        0 20px 40px -20px rgba(0, 0, 0, 0.3),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #1a1714;
    border-radius: 0 0 16px 16px;
    z-index: 10;
}

.phone-mockup img {
    width: 100%;
    border-radius: 32px;
    display: block;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-light);
    font-size: 0.8125rem;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 520px;
    margin: 0 auto;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--space-4xl) 0;
    background: radial-gradient(circle at 0% 0%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 100% 100%, rgba(236, 72, 153, 0.03) 0%, transparent 50%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 48px rgba(79, 70, 229, 0.08);
    border-color: rgba(79, 70, 229, 0.15);
}

.feature-large {
    grid-column: span 3;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-xl);
    align-items: center;
    padding: var(--space-2xl);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: none;
}

.feature-large .feature-icon {
    width: 80px;
    height: 80px;
}

.feature-large h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.feature-large p {
    max-width: 600px;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   Gallery Section
   ======================================== */
.gallery {
    padding: var(--space-4xl) 0;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #F1F0EC 0%, #E5E7EB 100%);
    box-shadow: 0 4px 12px var(--color-shadow);
    transition: all var(--transition-base);
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 32px 64px rgba(79, 70, 229, 0.1);
}

.gallery-image {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-lg);
    padding-bottom: 0;
}

.gallery-image img {
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(28, 25, 23, 0.15);
    transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image img {
    transform: scale(1.03);
}

.gallery-caption {
    padding: var(--space-lg);
    background: var(--color-surface);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.gallery-caption h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.gallery-caption p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ========================================
   Philosophy Section
   ======================================== */
.philosophy {
    padding: var(--space-4xl) 0;
    background: var(--color-text);
    color: var(--color-bg);
}

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.philosophy blockquote {
    margin-bottom: var(--space-3xl);
}

.quote-mark {
    display: block;
    font-family: var(--font-display);
    font-size: 6rem;
    line-height: 0.5;
    color: var(--color-accent);
    opacity: 0.5;
    margin-bottom: var(--space-md);
}

.philosophy blockquote p {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 300;
    font-style: italic;
    line-height: 1.6;
    opacity: 0.9;
}

.philosophy-features {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

.phi-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.phi-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent-light);
}

.phi-label {
    font-size: 0.875rem;
    color: rgba(253, 251, 247, 0.7);
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
    padding: var(--space-4xl) 0;
    background: var(--color-bg);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    align-items: start;
}

.pricing-card {
    position: relative;
    padding: var(--space-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.pricing-card.featured {
    border: 2px solid transparent;
    background: linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
                linear-gradient(135deg, var(--color-accent), var(--color-accent-light), var(--color-highlight)) border-box;
    transform: scale(1.05);
    box-shadow: 0 24px 64px rgba(79, 70, 229, 0.12);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-6px);
    box-shadow: 0 32px 80px rgba(79, 70, 229, 0.18);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
}

.pricing-header {
    margin-bottom: var(--space-lg);
}

.pricing-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.pricing-tagline {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.pricing-price {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.price-amount {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.price-period {
    font-size: 1rem;
    color: var(--color-text-muted);
}

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

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.pricing-features svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.pricing-card .btn {
    width: 100%;
}

.pricing-legal {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: var(--space-2xl) auto 0;
    line-height: 1.6;
}

.pricing-legal a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.pricing-legal a:hover {
    color: var(--color-accent-dark);
}

/* ========================================
   Download Section
   ======================================== */
.download {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 50%, var(--color-accent-dark) 100%);
    color: white;
}

.download-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--space-md);
}

.download-content > p {
    font-size: 1.0625rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.download-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.app-store-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    background: var(--color-text);
    color: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.app-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.app-store-btn svg {
    width: 32px;
    height: 32px;
}

.app-store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    font-size: 0.75rem;
}

.app-store-text strong {
    font-size: 1.25rem;
    font-weight: 600;
}

.download-note {
    font-size: 0.8125rem;
    opacity: 0.7;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

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

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.footer-column h4 {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.footer-column a {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

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

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

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-large {
        grid-column: span 2;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding-top: calc(72px + var(--space-2xl));
    }
    
    .hero-content {
        margin-bottom: var(--space-2xl);
    }
    
    .phone-mockup {
        width: 240px;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-large {
        grid-column: span 1;
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .feature-large .feature-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .philosophy-features {
        gap: var(--space-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-column {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .phone-mockup {
        width: 200px;
    }
    
    .phi-number {
        font-size: 2rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Selection color */
::selection {
    background: var(--color-accent);
    color: white;
}