/* Learn to Feel - Clean Modern Design */

:root {
    --color-bg: #FAFAF9;
    --color-bg-warm: #F5F3F0;
    --color-card: #FFFFFF;
    --color-text: #1a1a1a;
    --color-text-muted: #5c5c5c;
    --color-text-light: #8a8a8a;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

img, svg, video {
    display: block;
    max-width: 100%;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; letter-spacing: -0.01em; }
h3 { font-size: 1.125rem; }

p { margin-bottom: var(--space-sm); }
p:last-child { margin-bottom: 0; }

/* Container */
.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container--narrow {
    max-width: 680px;
}

/* Header */
.header {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    max-width: 1100px;
    margin: 0 auto;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 600;
    color: var(--color-text);
    font-size: 1.125rem;
}

.nav__brand svg {
    width: 24px;
    height: 24px;
    color: #e57373;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
}

.nav__link {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: all 0.2s;
}

.nav__link:hover {
    background: var(--color-bg-warm);
    color: var(--color-text);
}

.nav__link--active {
    color: var(--color-text);
    font-weight: 500;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    background: var(--color-bg-warm);
    border-radius: var(--radius-sm);
    padding: 2px;
}

.lang-toggle__btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.lang-toggle__btn:hover {
    color: var(--color-text);
}

.lang-toggle__btn--active {
    background: var(--color-card);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

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

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

.btn--small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Sections */
.section {
    padding: var(--space-2xl) 0;
}

.section--hero {
    padding: var(--space-2xl) 0 var(--space-xl);
    background: var(--color-card);
}

.section--alt {
    background: var(--color-bg-warm);
}

.section__title {
    margin-bottom: var(--space-lg);
    text-align: center;
}

.section__note {
    margin-top: var(--space-sm);
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

/* Hero */
.hero__layout {
    display: grid;
    gap: var(--space-xl);
    align-items: center;
    max-width: 820px;
    margin: 0 auto;
}

.hero__content {
    text-align: center;
}

.hero__eyebrow {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.hero__title {
    font-size: 2.75rem;
    margin-bottom: var(--space-sm);
    line-height: 1.15;
}

.hero__tagline {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero__body {
    max-width: 520px;
    margin: 0 auto var(--space-lg);
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.hero__cta {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.app-store-badge {
    display: inline-flex;
    align-items: center;
    height: calc(1rem * 1.6 + 24px);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s;
}

.app-store-badge img {
    height: 100%;
    width: auto;
    display: block;
}

.app-store-badge:hover {
    box-shadow: var(--shadow-md);
}

/* Steps */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.step__number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.step__text {
    font-size: 0.9375rem;
    color: var(--color-text);
}

/* Screenshots Row */
.screenshots-row {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: nowrap;
    align-items: flex-end;
}

.screenshot {
    text-align: center;
    flex: 1 1 0;
    min-width: 0;
}

.screenshot-frame {
    background: linear-gradient(145deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: 32px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
    max-width: 170px;
    margin: 0 auto;
}

.screenshot-frame img {
    border-radius: 24px;
    width: 100%;
    height: auto;
    display: block;
}

.screenshot figcaption {
    margin-top: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Feature Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    text-align: center;
}

.card__icon-wrap {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    margin: 0 auto var(--space-sm);
}

.card__icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.card__title {
    margin-bottom: var(--space-xs);
}

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

/* Audience */
.audience {
    text-align: center;
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.faq-item__question {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.faq-item__answer {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* Disclaimer */
.disclaimer {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    padding: var(--space-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-border);
}

/* Footer */
.footer {
    background: var(--color-card);
    border-top: 1px solid var(--color-border-light);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

/* Support Page */
.contact-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-lg);
}

.contact-card__email {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-top: var(--space-sm);
}

.contact-card__note {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

/* Troubleshooting */
.trouble-item {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    border: 1px solid var(--color-border-light);
}

.trouble-item__title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.trouble-item__solution {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* Checklist */
.checklist {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    border: 1px solid var(--color-border-light);
}

.checklist__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.checklist__item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-muted);
}

.checklist__item::before {
    content: "";
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    flex-shrink: 0;
}

/* Privacy Page */
.legal-content {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.legal-content h2 {
    font-size: 1.25rem;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-border-light);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content ul {
    margin: var(--space-sm) 0;
    padding-left: var(--space-md);
}

.legal-content li {
    margin-bottom: var(--space-xs);
    color: var(--color-text-muted);
}

.legal-content p {
    color: var(--color-text-muted);
}

.evidence__citation {
    color: var(--color-text-light);
    font-size: 0.875rem;
    line-height: 1.5;
}

.legal-meta {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-top: var(--space-lg);
}

/* Utilities */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .hero__title { font-size: 2rem; }
    .hero__tagline { font-size: 1rem; }
    
    .nav { padding: var(--space-sm); }
    .nav__links { gap: 2px; }
    .nav__link { padding: var(--space-xs); font-size: 0.875rem; }
    
    .steps { grid-template-columns: 1fr; }
    
    .screenshots-row {
        gap: var(--space-md);
    }
    
    .screenshot-frame {
        max-width: 150px;
        border-radius: 24px;
        padding: 6px;
    }
    
    .screenshot-frame img {
        border-radius: 18px;
    }
}

@media (min-width: 768px) {
    .hero__layout {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        align-items: center;
    }
    
    .hero__content {
        text-align: left;
    }
    
    .hero__tagline {
        margin-left: 0;
        margin-right: 0;
    }

    .hero__body {
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero__cta {
        justify-content: flex-start;
    }
    
    .hero__cta {
        justify-content: flex-start;
    }
}

@media (min-width: 1024px) {
    .screenshot-frame {
        max-width: 190px;
    }
}

@media (max-width: 900px) {
    .screenshots-row {
        flex-wrap: wrap;
    }
}

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

/* Print */
@media print {
    .header, .footer, .lang-toggle, .btn { display: none; }
    body { background: white; }
    .card, .legal-content { box-shadow: none; border: 1px solid #ccc; }
}