/* ============================================
   CSS Variables - Momentum Design System
   ============================================ */
:root {
    /* Light Theme Colors */
    --primary: #007bff;
    --secondary: #6c757d;
    --background: #ffffff;
    --surface: #f8f9fa;
    --text: #333333;
    --textSecondary: #666666;
    --border: #e9ecef;
    --success: #28a745;
    --warning: #ffc107;
    --error: #dc3545;
    --card: #ffffff;
    --button: #007bff;
    --buttonText: #ffffff;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 10px;
    --font-size-small: 12px;
    --font-size-medium: 13px;
    --font-size-large: 14px;
    --font-size-xlarge: 16px;
    --font-size-xxlarge: 18px;
    --font-size-title: 20px;
    --font-size-modal-title: 24px;
    --font-size-screen-title-mobile: 28px;
    --font-size-screen-title-tablet: 36px;
    
    /* Spacing */
    --spacing-xs: 2px;
    --spacing-small: 4px;
    --spacing-medium: 8px;
    --spacing-large: 12px;
    --spacing-xlarge: 16px;
    --spacing-xxlarge: 20px;
    
    /* Padding */
    --padding-xs: 3px;
    --padding-small: 8px;
    --padding-medium: 12px;
    --padding-large: 16px;
    --padding-xlarge: 20px;
    --padding-xxlarge: 24px;
    
    /* Border Radius */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-xlarge: 20px;
    
    /* Shadows */
    --shadow-small: 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 4px 8px rgba(0, 0, 0, 0.25);
    --shadow-card: 0 2px 6px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition-fast: 140ms;
    --transition-normal: 300ms;
    --transition-slow: 800ms;
}

/* Dark Theme */
[data-theme="dark"] {
    --primary: #0d6efd;
    --secondary: #6c757d;
    --background: #1a1a1a;
    --surface: #2d2d2d;
    --text: #ffffff;
    --textSecondary: #cccccc;
    --border: #404040;
    --success: #198754;
    --warning: #fd7e14;
    --error: #dc3545;
    --card: #2d2d2d;
    --button: #0d6efd;
    --buttonText: #ffffff;
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    width: 100%;
    overflow-x: hidden;
    animation: page-fade-in 0.3s ease forwards;
}

body.page-exiting {
    animation: none;
    opacity: 0;
    transition: opacity 0.25s ease;
}

@keyframes page-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Skip link - visible on focus for keyboard users */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--padding-large);
    padding: var(--padding-medium) var(--padding-large);
    background: var(--primary);
    color: var(--buttonText);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-small);
    z-index: 9999;
    transition: top var(--transition-fast);
}
.skip-link:focus {
    top: var(--padding-large);
    outline: 2px solid var(--text);
    outline-offset: 2px;
}

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--padding-xxlarge) var(--padding-xlarge);
    width: 100%;
    box-sizing: border-box;
}

/* ============================================
   Theme Toggle
   ============================================ */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-small);
    flex-shrink: 0;
    margin-left: var(--spacing-large);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary);
}

/* ============================================
   Navigation Tabs
   ============================================ */
.nav-tabs {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: var(--padding-large) 0;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    min-height: 60px;
    display: flex;
    align-items: center;
}

.nav-tabs .wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 var(--padding-xlarge);
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-large);
    flex-wrap: nowrap;
    flex: 1;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-links::-webkit-scrollbar {
    display: none;
}

.nav-tab {
    color: var(--textSecondary);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-medium);
    transition: all var(--transition-normal);
}

.nav-tab:hover {
    color: var(--text);
    background: rgba(0, 123, 255, 0.1);
}

.nav-tab.active {
    color: var(--primary);
    background: rgba(0, 123, 255, 0.15);
}

.nav-tab:active {
    transform: scale(0.95);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--padding-large);
    align-items: center;
    min-width: 0;
    background: linear-gradient(135deg, var(--surface) 0%, var(--background) 50%, var(--surface) 100%);
    border-radius: var(--radius-large);
    padding: var(--padding-xlarge);
    margin-bottom: var(--padding-xlarge);
    scroll-margin-top: 60px;
    transition: background var(--transition-normal);
}

.hero-content {
    display: contents;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-large);
    text-align: center;
    padding: 0;
    min-width: 0;
}

.app-branding {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-medium);
    margin-bottom: var(--spacing-small);
}

.app-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-medium);
    object-fit: contain;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.app-logo:hover {
    transform: scale(1.05);
}

.brand-name {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin: 0;
}

.seo-h1 {
    font-size: 34px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.5px;
    margin: 0 0 var(--spacing-medium);
    text-align: center;
    line-height: 1.25;
}

.app-name-primary {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
}

.app-name-secondary {
    font-size: 22px;
    font-weight: 500;
    color: var(--textSecondary);
}

.tagline {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    font-weight: 500;
    margin: 0;
    line-height: 1.5;
}

/* Hero Visual Container */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    padding: 0;
    box-sizing: border-box;
}

/* Phone Frame Container – no overflow clip so full phone shows; no extra bg */
.phone-frame-container {
    position: relative;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    padding: 0;
    display: block;
    box-sizing: border-box;
}

/* Match frame aspect (500×1014) to avoid letterboxing / white border */
.phone-frame-container::before {
    content: '';
    display: block;
    width: 100%;
    padding-top: 202.8%; /* 1014/500 */
}

.phone-screen-content {
    position: absolute;
    top: 6%;
    left: 8%;
    width: 84%;
    height: 88%;
    z-index: 0;
    object-fit: cover;
    object-position: center;
    margin: 0;
    padding: 0;
    border-radius: 8%;
    box-sizing: border-box;
}

.phone-frame {
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
    transition: opacity var(--transition-slow) ease-in-out, visibility var(--transition-slow) ease-in-out;
    object-fit: contain;
    object-position: center;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.phone-frame.frame-light {
    opacity: 1;
    visibility: visible;
}

.phone-frame.frame-dark {
    opacity: 0;
    visibility: hidden;
}

[data-theme="dark"] .phone-frame.frame-light {
    opacity: 0;
    visibility: hidden;
}

[data-theme="dark"] .phone-frame.frame-dark {
    opacity: 1;
    visibility: visible;
}

/* Countdown Timer */
.countdown-container {
    margin: var(--spacing-large) 0;
    padding: var(--padding-large);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.countdown-label {
    font-size: var(--font-size-medium);
    color: var(--textSecondary);
    margin-bottom: var(--spacing-large);
    margin-top: 0;
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0;
}

.countdown {
    display: flex;
    gap: var(--spacing-large);
    justify-content: center;
    flex-wrap: wrap;
    padding: 0;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 52px;
}

.countdown-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.countdown-label-small {
    font-size: var(--font-size-small);
    color: var(--textSecondary);
    margin-top: var(--spacing-small);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Download Buttons */
.download-buttons {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: var(--spacing-medium);
    margin-top: var(--spacing-small);
    justify-content: center;
    align-items: stretch;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-small);
    flex: 1 1 0;
    min-width: 0;
    padding: var(--padding-medium) var(--padding-large);
    background: var(--button);
    color: var(--buttonText);
    border: none;
    border-radius: var(--radius-medium);
    font-size: var(--font-size-large);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-medium);
    text-align: center;
}

.download-icon {
    display: inline-flex;
    flex-shrink: 0;
}

.download-icon svg {
    width: 1.25em;
    height: 1.25em;
    vertical-align: middle;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
    opacity: 0.9;
}

.download-btn:active {
    transform: translateY(0);
    opacity: 0.85;
}

/* ============================================
   About Section
   ============================================ */
.about {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.about-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    padding: calc(var(--padding-xxlarge) * 2);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
}

.about-card .section-text {
    padding: 0;
}

.section-title {
    font-size: var(--font-size-screen-title-mobile);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-xlarge);
    text-align: center;
    letter-spacing: 0.5px;
}

.section-text {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* ============================================
   SEO Content Blocks (Indexable Copy)
   ============================================ */

.seo-block,
.faq {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.seo-card,
.faq-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    padding: calc(var(--padding-xxlarge) * 2);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
    text-align: left;
}

.seo-card h2,
.faq-card h2 {
    font-size: var(--font-size-modal-title);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-xlarge);
    letter-spacing: 0.5px;
    text-align: center;
}

.seo-card h3,
.faq-card h3 {
    font-size: var(--font-size-title);
    font-weight: 600;
    color: var(--text);
    margin: var(--spacing-xxlarge) 0 var(--spacing-large);
    letter-spacing: 0.3px;
}

.seo-card p,
.faq-card p {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.8;
    margin: 0 0 var(--spacing-xlarge);
}

.seo-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-large) 0 0;
    display: grid;
    gap: var(--spacing-large);
}

.seo-list li {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    padding: var(--padding-xlarge);
    box-shadow: var(--shadow-small);
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.6;
}

.seo-list li strong {
    color: var(--text);
    font-weight: 600;
}

/* FAQ styling */
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    padding: var(--padding-xlarge);
    box-shadow: var(--shadow-small);
    margin-top: var(--spacing-large);
}

.faq-item h3 {
    margin: 0 0 var(--spacing-medium);
    font-size: var(--font-size-title);
    color: var(--text);
}

.faq-item p {
    margin: 0;
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.7;
}

/* ============================================
   Blog Teaser (Homepage)
   ============================================ */
.blog-teaser {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.blog-teaser-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    padding: calc(var(--padding-xxlarge) * 2);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
    text-align: left;
}

.blog-teaser-card h2 {
    font-size: var(--font-size-modal-title);
    font-weight: 700;
    color: var(--text);
    margin: 0 0 var(--spacing-large);
    letter-spacing: 0.5px;
    text-align: center;
}

.blog-teaser-intro {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.8;
    margin: 0 0 var(--spacing-xxlarge);
    text-align: center;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.blog-teaser-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xlarge);
    margin-bottom: var(--spacing-xxlarge);
}

.blog-teaser-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    padding: var(--padding-xlarge);
    box-shadow: var(--shadow-small);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), transform var(--transition-normal);
}

.blog-teaser-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.blog-teaser-item h3 {
    font-size: var(--font-size-title);
    font-weight: 600;
    color: var(--text);
    margin: 0 0 var(--spacing-medium);
    letter-spacing: 0.3px;
}

.blog-teaser-item h3 a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.blog-teaser-item h3 a:hover {
    color: var(--primary);
}

.blog-teaser-item p {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.7;
    margin: 0;
}

.blog-teaser-cta {
    text-align: center;
    margin-top: var(--spacing-xlarge);
}

.blog-teaser-cta .download-btn {
    display: inline-block;
}

/* ============================================
   Trust Signals
   ============================================ */
.trust-signals {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.trust-signals-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    padding: calc(var(--padding-xxlarge) * 2);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
}

.trust-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-large);
}

.trust-list li {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.6;
    padding-left: 1.5em;
    position: relative;
}

.trust-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--text);
    font-weight: 600;
}

/* ============================================
   Features Section
   ============================================ */
.features-section {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.features-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    padding: calc(var(--padding-xxlarge) * 2);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
}

.features-card .section-title {
    padding: 0;
    margin-bottom: var(--spacing-xxlarge);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xlarge);
    margin-top: var(--spacing-xlarge);
}

.feature-card {
    padding: var(--padding-xxlarge);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-large);
    margin-bottom: var(--spacing-large);
    padding: 0;
}

.feature-description {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

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

.feature-icon {
    font-size: 32px;
    line-height: 1;
    flex-shrink: 0;
}

.feature-title {
    font-size: var(--font-size-title);
    font-weight: 600;
    color: var(--text);
    margin: 0;
    letter-spacing: 0.3px;
}

/* ============================================
   Email Signup Section
   ============================================ */
.email-signup {
    margin-bottom: var(--padding-xxlarge);
    scroll-margin-top: 60px;
}

.email-card {
    max-width: 600px;
    margin: 0 auto;
    padding: calc(var(--padding-xxlarge) * 2);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    box-shadow: var(--shadow-card);
    text-align: center;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
}

.email-card .email-title,
.email-card .email-description,
.email-card .email-form,
.email-card .email-privacy {
    padding: 0;
}

.email-title {
    font-size: var(--font-size-modal-title);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-large);
    letter-spacing: 0.5px;
}

.email-description {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    margin-bottom: var(--spacing-xlarge);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.email-form {
    display: flex;
    gap: var(--spacing-large);
    margin: var(--spacing-xlarge) 0;
    flex-wrap: wrap;
    justify-content: center;
}

.email-input {
    flex: 1;
    min-width: 250px;
    max-width: 400px;
    padding: var(--padding-large);
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
    color: var(--text);
    font-size: var(--font-size-xlarge);
    font-family: var(--font-family);
    transition: all var(--transition-normal);
}

.email-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.email-submit-btn {
    padding: var(--padding-large) var(--padding-xxlarge);
    border-radius: var(--radius-medium);
    border: none;
    background: var(--button);
    color: var(--buttonText);
    font-size: var(--font-size-xlarge);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    box-shadow: var(--shadow-medium);
}

.email-submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-large);
}

.email-privacy {
    font-size: var(--font-size-small);
    color: var(--textSecondary);
    margin-top: var(--spacing-large);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    margin-bottom: var(--padding-xxlarge);
    text-align: center;
    scroll-margin-top: 60px;
}

.contact-card {
    max-width: 600px;
    margin: var(--spacing-xlarge) auto 0;
    padding: calc(var(--padding-xxlarge) * 2);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xlarge);
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    width: 100%;
    box-sizing: border-box;
}

.contact-card .contact-form {
    padding: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xlarge);
    text-align: left;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-small);
}

.form-label {
    font-size: var(--font-size-large);
    font-weight: 600;
    color: var(--text);
}

.form-input,
.form-textarea {
    padding: var(--padding-large);
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
    color: var(--text);
    font-size: var(--font-size-xlarge);
    font-family: var(--font-family);
    transition: all var(--transition-normal);
    width: 100%;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-submit-btn {
    padding: var(--padding-large) var(--padding-xxlarge);
    border-radius: var(--radius-medium);
    border: none;
    background: var(--button);
    color: var(--buttonText);
    font-size: var(--font-size-xlarge);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-medium);
    margin-top: var(--spacing-medium);
}

.contact-submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.contact-submit-btn:active {
    transform: translateY(0);
    opacity: 0.85;
}

.contact-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-message {
    padding: var(--padding-large);
    border-radius: var(--radius-medium);
    font-size: var(--font-size-large);
    font-weight: 500;
    text-align: center;
    margin-bottom: var(--spacing-medium);
    animation: slideIn 0.3s ease;
}

.form-message-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.form-message-error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Blog Post
   ============================================ */
.blog-post {
    max-width: 720px;
    margin: 0 auto var(--padding-xxlarge);
    padding-top: var(--padding-xxlarge);
}

.blog-title {
    font-size: var(--font-size-screen-title-mobile);
    font-weight: 800;
    color: var(--text);
    margin: 0 0 var(--spacing-xlarge);
    letter-spacing: 0.5px;
    line-height: 1.25;
}

.blog-intro {
    margin-bottom: var(--spacing-xxlarge);
}

.blog-intro p {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.8;
    margin: 0 0 var(--spacing-large);
}

.blog-intro p:last-child {
    margin-bottom: 0;
}

.blog-intro-narrative {
    margin-top: var(--spacing-xlarge);
    padding-top: var(--spacing-large);
    border-top: 1px solid var(--border);
}

.blog-intro-narrative p {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.8;
    margin: 0 0 var(--spacing-large);
}

.blog-intro-narrative p:last-child {
    margin-bottom: 0;
}

.blog-section {
    margin-bottom: var(--spacing-xxlarge);
    padding-bottom: var(--spacing-xxlarge);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .blog-section {
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.blog-section:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.blog-section-lead {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.7;
    margin: 0 0 var(--spacing-large);
}

.blog-section p {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.7;
    margin: 0 0 var(--spacing-large);
}

.blog-section .blog-list-label {
    font-size: var(--font-size-large);
    font-weight: 600;
    color: var(--text);
    margin: 0 0 var(--spacing-medium);
}

.blog-post blockquote.blog-blockquote {
    font-size: var(--font-size-xlarge);
    font-weight: 600;
    color: var(--text);
    margin: var(--spacing-large) 0;
    padding: var(--spacing-large) var(--spacing-xlarge);
    border-left: 4px solid var(--primary);
    background: var(--surface);
    border-radius: 0 var(--radius-large) var(--radius-large) 0;
}

.blog-section h2 {
    font-size: var(--font-size-modal-title);
    font-weight: 700;
    color: var(--text);
    margin: 0 0 var(--spacing-large);
    letter-spacing: 0.5px;
}

.blog-loop {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.7;
    margin: 0;
    font-weight: 600;
}

.blog-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.blog-list li {
    font-size: var(--font-size-large);
    color: var(--textSecondary);
    line-height: 1.7;
    padding-left: 1.5em;
    position: relative;
    margin-bottom: var(--spacing-small);
}

.blog-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text);
    font-weight: 600;
}

/* Premium CTA block (soft variant) */
.blog-cta {
    margin-top: var(--spacing-xxlarge);
    padding-top: var(--spacing-xxlarge);
    text-align: center;
}

.blog-cta h3 {
    font-size: var(--font-size-modal-title);
    font-weight: 700;
    color: var(--text);
    margin: 0 0 var(--spacing-large);
    letter-spacing: 0.5px;
    line-height: 1.3;
}

.blog-cta p {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    line-height: 1.6;
    margin: 0 0 var(--spacing-xlarge);
}

.blog-cta-btn {
    display: inline-block;
    margin-bottom: var(--spacing-medium);
    text-decoration: none;
}

/* BLOG HUB */
.blog-hub-hero {
    padding: 40px 0 32px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.blog-hub-hero h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin: 0 0 16px;
    color: var(--text);
    font-weight: 800;
}

.blog-hub-sub {
    margin: 0 0 24px;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
    color: var(--textSecondary);
    line-height: 1.6;
    font-size: 1.1rem;
}

.blog-hub-pillars {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

.blog-hub-pillars span {
    display: inline-flex;
    padding: 8px 16px;
    border: 1px solid rgba(0,0,0,0.12);
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--textSecondary);
    background: var(--surface);
    transition: all var(--transition-normal);
}

[data-theme="dark"] .blog-hub-pillars span {
    border-color: rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.03);
}

.blog-hub-pillars span:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.blog-hub-groups {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 24px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.blog-group {
    padding: 28px;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 16px;
    background: var(--card);
    max-width: 700px;
    width: 100%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all var(--transition-normal);
}

[data-theme="dark"] .blog-group {
    border-color: rgba(255,255,255,0.1);
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.blog-group:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

[data-theme="dark"] .blog-group:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.blog-group h2 {
    font-size: 1.4rem;
    margin: 0 0 20px;
    color: var(--text);
    font-weight: 700;
}

.blog-group ul {
    margin: 0;
    padding-left: 24px;
    list-style-type: disc;
}

.blog-group li {
    margin: 12px 0;
    color: var(--text);
    line-height: 1.7;
    font-size: 1.05rem;
}

.blog-group li::marker {
    color: var(--textSecondary);
}

.blog-group a {
    color: #2563eb;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-normal), font-weight var(--transition-fast);
}

.blog-group a:hover {
    color: #3b82f6;
    font-weight: 600;
}

[data-theme="dark"] .blog-group a {
    color: #7ec8ff;
}

[data-theme="dark"] .blog-group a:hover {
    color: #a5d8ff;
}

.blog-hub-cta {
    margin-top: 48px;
    padding: 40px 32px;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 16px;
    text-align: center;
    background: var(--card);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

[data-theme="dark"] .blog-hub-cta {
    border-color: rgba(255,255,255,0.1);
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.blog-hub-cta h2 {
    margin: 0 0 16px;
    color: var(--text);
    font-size: 1.8rem;
    font-weight: 700;
}

.blog-hub-cta p {
    margin: 0 0 32px;
    color: var(--textSecondary);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.blog-cta-text {
    font-size: var(--font-size-xlarge);
    color: var(--textSecondary);
    margin: 0 0 var(--spacing-large);
    line-height: 1.6;
}

/* Related guides (standalone section) */
section.blog-related {
    margin-top: var(--spacing-xxlarge);
    padding-top: var(--spacing-xxlarge);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

[data-theme="dark"] section.blog-related {
    border-top-color: rgba(255, 255, 255, 0.06);
}

section.blog-related h4 {
    font-size: var(--font-size-large);
    font-weight: 600;
    color: var(--text);
    margin: 0 0 var(--spacing-large);
    letter-spacing: 0.3px;
}

.blog-related-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
    display: inline-block;
}

.blog-related-list li {
    margin-bottom: var(--spacing-small);
}

.blog-related-list a {
    font-size: var(--font-size-medium);
    color: #2563eb;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-normal), font-weight var(--transition-fast);
}

.blog-related-list a:hover {
    color: #3b82f6;
    font-weight: 600;
}

[data-theme="dark"] .blog-related-list a {
    color: #7ec8ff;
}

[data-theme="dark"] .blog-related-list a:hover {
    color: #a5d8ff;
}

/* Bottom navigation links in blog-related section */
section.blog-related p {
    text-align: center;
    margin-top: 20px;
}

section.blog-related p a {
    color: #2563eb !important;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-normal);
}

section.blog-related p a:hover {
    color: #3b82f6 !important;
}

[data-theme="dark"] section.blog-related p a {
    color: #7ec8ff !important;
}

[data-theme="dark"] section.blog-related p a:hover {
    color: #a5d8ff !important;
}

/* ============================================
   Footer
   ============================================ */
footer {
    margin-top: var(--padding-xxlarge);
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-medium);
    color: var(--textSecondary);
    flex-wrap: wrap;
    gap: var(--spacing-large);
    text-align: center;
    padding: var(--padding-xxlarge) 0;
    border-top: 1px solid var(--border);
    transition: border-color var(--transition-normal);
}

footer a {
    color: var(--textSecondary);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 900px) {
    .wrap {
        width: 100%;
        max-width: 100%;
        padding: var(--padding-xlarge) var(--padding-large);
    }
    
    .hero {
        grid-template-columns: 1fr;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .phone-frame-container {
        max-width: 300px;
        width: 100%;
        padding: 0;
        margin-left: auto;
        margin-right: auto;
    }
    
    .countdown {
        gap: var(--spacing-medium);
    }
    
    .countdown-item {
        min-width: 48px;
    }
    
    .countdown-number {
        font-size: 22px;
    }
    
    .download-buttons {
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: center;
    }
    
    .download-btn {
        flex: 0 0 auto;
        width: 100%;
        max-width: 320px;
        min-width: 0;
        text-align: center;
        justify-content: center;
    }
    
    .blog-hub-groups {
        flex-direction: column;
        align-items: center;
    }
    
    .blog-group {
        max-width: 100%;
    }
    
    .blog-teaser-grid {
        grid-template-columns: 1fr;
    }
    
    .email-form {
        flex-direction: column;
    }
    
    .email-input {
        min-width: 100%;
        max-width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-teaser-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-large);
    }
    
    footer {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-tabs .wrap {
        padding: 0 var(--padding-large);
        gap: var(--spacing-medium);
    }
    
    .nav-links {
        gap: var(--spacing-medium);
        flex-wrap: nowrap;
        overflow-x: auto;
    }
    
    .nav-tab {
        font-size: var(--font-size-medium);
        padding: var(--padding-small) var(--padding-medium);
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 16px;
        margin-left: var(--spacing-medium);
        flex-shrink: 0;
    }
}

@media (max-width: 600px) {
    .wrap {
        padding: var(--padding-large) var(--padding-medium);
        width: 100%;
        max-width: 100%;
    }
    
    .hero {
        padding: var(--padding-large);
    }
    
    .phone-frame-container {
        max-width: 260px;
        padding: 0;
    }
    
    .app-name-primary {
        font-size: 30px;
    }
    
    .app-name-secondary {
        font-size: 18px;
    }
    
    .tagline {
        font-size: var(--font-size-large);
    }
    
    .section-title {
        font-size: var(--font-size-modal-title);
    }
    
    .email-card,
    .contact-card,
    .about-card,
    .features-card {
        padding: var(--padding-xlarge);
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .seo-card,
    .faq-card,
    .trust-signals-card,
    .blog-cta,
    .blog-teaser-card {
        padding: var(--padding-xlarge);
    }
    
    .blog-teaser-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-large);
    }

    .seo-h1 {
        font-size: 26px;
    }
    
    .blog-hub-groups {
        flex-direction: column;
        align-items: center;
    }
    
    .blog-group {
        max-width: 100%;
    }
    
    .nav-tabs .wrap {
        padding: 0 var(--padding-medium);
        gap: var(--spacing-small);
    }
    
    .nav-links {
        gap: var(--spacing-small);
        flex-wrap: nowrap;
        overflow-x: auto;
    }
    
    .nav-tab {
        font-size: var(--font-size-small);
        padding: var(--padding-small) var(--padding-medium);
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 14px;
        margin-left: var(--spacing-small);
        flex-shrink: 0;
    }
    
    .nav-tabs {
        min-height: 50px;
        padding: var(--padding-medium) 0;
    }
}