/* BNT Flashcards Landing Page Styles */
/* Design System based on Apple Human Interface Guidelines */

/* ==========================================
   CSS Variables - Design Tokens
   ========================================== */
:root {
    /* Primary Colors */
    --color-primary: #007AFF;
    --color-primary-hover: #0056CC;
    --color-primary-light: #E5F2FF;

    /* Background Colors */
    --color-background: #FFFFFF;
    --color-surface: #F2F2F7;
    --color-surface-secondary: #F0F7FF;
    --color-surface-tertiary: #E5E5EA;

    /* Text Colors */
    --color-text-primary: #000000;
    --color-text-secondary: #3C3C43;
    --color-text-tertiary: rgba(60, 60, 67, 0.6);
    --color-text-quaternary: rgba(60, 60, 67, 0.3);

    /* Semantic Colors */
    --color-success: #34C759;
    --color-warning: #FF9500;
    --color-error: #FF3B30;
    --color-info: #5856D6;

    /* Rating Colors */
    --color-again: #E85D54;
    --color-hard: #E8A854;
    --color-good: #5CB876;
    --color-easy: #5A9BD4;

    /* Separator */
    --color-separator: rgba(60, 60, 67, 0.18);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Font Sizes */
    --font-size-xs: 0.6875rem;    /* 11px */
    --font-size-sm: 0.75rem;      /* 12px */
    --font-size-base: 0.8125rem;  /* 13px */
    --font-size-md: 0.9375rem;    /* 15px */
    --font-size-lg: 1.0625rem;    /* 17px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.375rem;    /* 22px */
    --font-size-3xl: 1.75rem;     /* 28px */
    --font-size-4xl: 2.125rem;    /* 34px */
    --font-size-5xl: 2.75rem;     /* 44px */
    --font-size-6xl: 3.5rem;      /* 56px */

    /* Spacing */
    --spacing-xxs: 0.125rem;      /* 2px */
    --spacing-xs: 0.25rem;        /* 4px */
    --spacing-sm: 0.5rem;         /* 8px */
    --spacing-md: 0.75rem;        /* 12px */
    --spacing-lg: 1rem;           /* 16px */
    --spacing-xl: 1.25rem;        /* 20px */
    --spacing-2xl: 1.5rem;        /* 24px */
    --spacing-3xl: 2rem;          /* 32px */
    --spacing-4xl: 2.5rem;        /* 40px */
    --spacing-5xl: 3rem;          /* 48px */
    --spacing-6xl: 4rem;          /* 64px */
    --spacing-7xl: 5rem;          /* 80px */

    /* Border Radius */
    --radius-xs: 0.25rem;         /* 4px */
    --radius-sm: 0.5rem;          /* 8px */
    --radius-md: 0.75rem;         /* 12px */
    --radius-lg: 1rem;            /* 16px */
    --radius-xl: 1.25rem;         /* 20px */
    --radius-2xl: 1.5rem;         /* 24px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-Index */
    --z-navbar: 1000;
    --z-modal: 1050;
    --z-tooltip: 1100;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--spacing-lg);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #0A84FF;
        --color-primary-hover: #409CFF;
        --color-primary-light: #1A3A5C;

        --color-background: #000000;
        --color-surface: #1C1C1E;
        --color-surface-secondary: #2C2C2E;
        --color-surface-tertiary: #3A3A3C;

        --color-text-primary: #FFFFFF;
        --color-text-secondary: #EBEBF5;
        --color-text-tertiary: rgba(235, 235, 245, 0.6);
        --color-text-quaternary: rgba(235, 235, 245, 0.3);

        --color-success: #30D158;
        --color-warning: #FF9F0A;
        --color-error: #FF453A;
        --color-info: #5E5CE6;

        --color-again: #FF6961;
        --color-hard: #FFB366;
        --color-good: #6FCF87;
        --color-easy: #6EAEE8;

        --color-separator: rgba(84, 84, 88, 0.65);

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.5);
        --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.6);
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-lg);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-background);
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul {
    list-style: none;
}

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

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-info) 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(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: inherit;
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

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

.btn-secondary:hover {
    background-color: var(--color-surface-tertiary);
    color: var(--color-text-primary);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-md);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-separator);
    transition: all var(--transition-normal);
}

@media (prefers-color-scheme: dark) {
    .navbar {
        background-color: rgba(0, 0, 0, 0.8);
    }
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo:hover {
    color: var(--color-text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-3xl);
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    padding: calc(64px + var(--spacing-7xl)) 0 var(--spacing-7xl);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-6xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-warning);
    margin-bottom: var(--spacing-2xl);
}

.hero h1 {
    font-size: var(--font-size-6xl);
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-3xl);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-4xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-4xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.stat-label {
    font-size: var(--font-size-md);
    color: var(--color-text-tertiary);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1C1C1E 0%, #2C2C2E 100%);
    border-radius: 44px;
    padding: 12px;
    box-shadow: var(--shadow-2xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    border-radius: 36px;
    overflow: hidden;
}

.app-preview {
    padding: var(--spacing-xl);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.preview-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.preview-progress {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.flashcard-preview {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flashcard-front {
    width: 100%;
    padding: var(--spacing-4xl) var(--spacing-2xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.flashcard-word {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.flashcard-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.rating-buttons-preview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.rating-btn {
    padding: var(--spacing-md) var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: #FFFFFF;
}

.rating-btn.again { background-color: var(--color-again); }
.rating-btn.hard { background-color: var(--color-hard); }
.rating-btn.good { background-color: var(--color-good); }
.rating-btn.easy { background-color: var(--color-easy); }

/* Floating Cards */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 60px;
    right: -40px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    bottom: 100px;
    left: -40px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.floating-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.floating-icon.success {
    background-color: rgba(52, 199, 89, 0.15);
    color: var(--color-success);
}

.floating-icon.info {
    background-color: rgba(88, 86, 214, 0.15);
    color: var(--color-info);
}

.floating-text {
    display: flex;
    flex-direction: column;
}

.floating-title {
    font-size: var(--font-size-md);
    font-weight: 600;
}

.floating-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ==========================================
   Section Styles
   ========================================== */
section {
    padding: var(--spacing-7xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-5xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-lg);
}

.section-header p {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
}

/* ==========================================
   Features Section
   ========================================== */
.features {
    background-color: var(--color-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
}

.feature-card {
    padding: var(--spacing-3xl);
    background-color: var(--color-background);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.feature-card h3 {
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
}

/* ==========================================
   How It Works Section
   ========================================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3xl);
}

.step-card {
    position: relative;
    padding: var(--spacing-3xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
}

.step-number {
    position: absolute;
    top: -20px;
    left: var(--spacing-3xl);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: var(--radius-full);
}

.step-content {
    margin-bottom: var(--spacing-2xl);
}

.step-content h3 {
    margin-bottom: var(--spacing-md);
}

.step-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
}

.step-visual {
    display: flex;
    justify-content: center;
}

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

.lang-flag {
    font-size: var(--font-size-3xl);
}

.mini-flashcard {
    padding: var(--spacing-xl) var(--spacing-3xl);
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.mini-word {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.mini-translation {
    font-size: var(--font-size-md);
    color: var(--color-text-tertiary);
}

.mini-chart {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-xs);
    height: 80px;
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
}

.chart-bar {
    flex: 1;
    background-color: var(--color-surface-tertiary);
    border-radius: var(--radius-xs);
    transition: background-color var(--transition-fast);
}

.chart-bar.active {
    background-color: var(--color-primary);
}

/* ==========================================
   Testimonials Section
   ========================================== */
.testimonials {
    background-color: var(--color-surface);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
}

.testimonial-card {
    padding: var(--spacing-2xl);
    background-color: var(--color-background);
    border-radius: var(--radius-xl);
}

.testimonial-rating {
    display: flex;
    gap: var(--spacing-xxs);
    color: var(--color-warning);
    margin-bottom: var(--spacing-lg);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

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

.author-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-size: var(--font-size-md);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
}

.author-detail {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ==========================================
   Pricing Section
   ========================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
    align-items: start;
}

.pricing-card {
    position: relative;
    padding: var(--spacing-3xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-normal);
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.featured {
    background-color: var(--color-text-primary);
    color: var(--color-background);
}

.pricing-card.featured .price-period,
.pricing-card.featured .pricing-features li {
    color: rgba(255, 255, 255, 0.7);
}

.pricing-card.featured .btn-primary {
    background-color: #FFFFFF;
    color: var(--color-text-primary);
}

.pricing-card.featured .btn-primary:hover {
    background-color: var(--color-surface);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-lg);
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-separator);
}

.pricing-header h3 {
    margin-bottom: var(--spacing-md);
}

.pricing-card.featured .pricing-header {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
}

.price-amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
}

.price-period {
    font-size: var(--font-size-md);
    color: var(--color-text-tertiary);
}

.pricing-features {
    margin-bottom: var(--spacing-2xl);
}

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

.pricing-features svg {
    flex-shrink: 0;
    color: var(--color-success);
}

.pricing-card.featured .pricing-features svg {
    color: var(--color-success);
}

.pricing-note {
    text-align: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--spacing-md);
}

/* ==========================================
   FAQ Section
   ========================================== */
.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-separator);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) 0;
    background: none;
    border: none;
    font-family: inherit;
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: left;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: var(--spacing-xl);
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.faq-answer a {
    color: var(--color-primary);
}

/* ==========================================
   Download CTA Section
   ========================================== */
.download-cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-info) 100%);
    color: #FFFFFF;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    color: #FFFFFF;
    margin-bottom: var(--spacing-lg);
}

.cta-content p {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-3xl);
}

.store-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.store-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: #000000;
    color: #FFFFFF;
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.store-button:hover {
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.store-icon {
    width: 28px;
    height: 28px;
}

.store-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.store-subtitle {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.store-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: var(--spacing-6xl) 0 var(--spacing-3xl);
    background-color: var(--color-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-4xl);
    margin-bottom: var(--spacing-4xl);
}

.footer-brand {
    max-width: 280px;
}

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

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-xl);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--color-primary);
    color: #FFFFFF;
}

.footer-links h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
}

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

.footer-bottom {
    padding-top: var(--spacing-3xl);
    border-top: 1px solid var(--color-separator);
    text-align: center;
}

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

.footer-legal {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

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

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

    .hero-visual {
        display: none;
    }

    .features-grid,
    .steps-grid,
    .testimonials-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-lg);
    }

    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-3xl); }

    .hero h1 {
        font-size: var(--font-size-4xl);
    }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-background);
        padding: var(--spacing-2xl);
        gap: var(--spacing-xl);
        border-bottom: 1px solid var(--color-separator);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .store-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .social-links {
        justify-content: center;
    }
}

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

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================
   Legal Pages Styles
   ========================================== */
.legal-page {
    padding: calc(64px + var(--spacing-5xl)) 0 var(--spacing-5xl);
}

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

.legal-content h1 {
    margin-bottom: var(--spacing-lg);
}

.legal-content .last-updated {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-4xl);
}

.legal-content h2 {
    font-size: var(--font-size-2xl);
    margin-top: var(--spacing-4xl);
    margin-bottom: var(--spacing-lg);
}

.legal-content h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.legal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.legal-content ul,
.legal-content ol {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-2xl);
}

.legal-content li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.legal-content a {
    color: var(--color-primary);
}

.legal-content .contact-info {
    padding: var(--spacing-2xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-3xl);
}

.legal-content .contact-info h3 {
    margin-top: 0;
}

/* ==========================================
   Support Page Styles
   ========================================== */
.support-hero {
    padding: calc(64px + var(--spacing-5xl)) 0 var(--spacing-4xl);
    background-color: var(--color-surface);
    text-align: center;
}

.support-hero h1 {
    margin-bottom: var(--spacing-lg);
}

.support-hero p {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.support-content {
    padding: var(--spacing-5xl) 0;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-5xl);
}

.support-card {
    padding: var(--spacing-3xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    text-align: center;
}

.support-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin: 0 auto var(--spacing-xl);
}

.support-card h3 {
    margin-bottom: var(--spacing-md);
}

.support-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-4xl);
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
}

.contact-form h2 {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: inherit;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    border: 1px solid var(--color-separator);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

@media (max-width: 768px) {
    .support-grid {
        grid-template-columns: 1fr;
    }
}