/* ─── Design Tokens ─────────────────────────────────────────────────── */
:root {
    --green-900: #1B4332;
    --green-700: #2D6A4F;
    --green-500: #52B788;
    --green-100: #D8F3DC;
    --green-50:  #F0FAF2;

    --warm-bg:   #F7F5F0;
    --surface:   #FFFFFF;
    --border:    #E5E0D8;
    --border-focus: #52B788;

    --text-primary:   #111827;
    --text-secondary: #4B5563;
    --text-muted:     #9CA3AF;

    --danger:        #DC2626;
    --danger-bg:     #FEF2F2;
    --danger-border: #FECACA;

    --warning-bg:     #FFFBEB;
    --warning-border: #F59E0B;

    --success-bg:     #F0FDF4;
    --success-border: #22C55E;
    --success-text:   #15803D;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,.07), 0 1px 4px rgba(0,0,0,.04);

    --transition: 0.2s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--warm-bg);
}

img { max-width: 100%; display: block; }
a   { color: var(--green-700); text-decoration: none; }
a:hover { color: var(--green-500); }

/* ─── Navigation ─────────────────────────────────────────────────────── */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1000px;
    margin: 0 auto;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-wordmark {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--green-900);
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

.nav-links a:hover { color: var(--green-900); }

/* ─── Layout Containers ──────────────────────────────────────────────── */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container--narrow {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ─── Hero ───────────────────────────────────────────────────────────── */
.hero {
    text-align: center;
    padding: 6rem 1.5rem 4rem;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--green-500);
    margin-bottom: 1.25rem;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-title span { color: var(--green-700); }

.hero-sub {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto 2.5rem;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.badge-google-play {
    height: 56px;
    width: auto;
    border-radius: 8px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.badge-google-play:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.store-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.badge-app-store {
    height: 40px;
    width: auto;
    border-radius: 8px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.badge-app-store:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Features Grid ──────────────────────────────────────────────────── */
.features {
    padding: 4rem 1.5rem 6rem;
}

.section-label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    border-color: var(--green-100);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--green-50);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--green-700);
}

.feature-icon svg { width: 20px; height: 20px; }

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ─── Privacy / Long-form Content ────────────────────────────────────── */
.content-page {
    padding: 4rem 0 6rem;
}

.content-page h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.content-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.content-body h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.content-body h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.content-body p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-body ul,
.content-body ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.content-body li { margin-bottom: 0.4rem; line-height: 1.75; }

.content-body strong { color: var(--text-primary); font-weight: 600; }

.content-body a {
    color: var(--green-700);
    border-bottom: 1px solid var(--green-100);
    transition: border-color var(--transition), color var(--transition);
}

.content-body a:hover {
    color: var(--green-500);
    border-bottom-color: var(--green-500);
}

.info-callout {
    background: var(--green-50);
    border: 1px solid var(--green-100);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.info-callout strong { color: var(--green-700); }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 3rem;
    transition: color var(--transition);
}

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

/* ─── Account Deletion Form ──────────────────────────────────────────── */
.form-page {
    padding: 4rem 0 6rem;
}

.form-page-header { margin-bottom: 2.5rem; }

.form-page-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-page-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.warning-notice {
    border: 1px solid var(--warning-border);
    background: var(--warning-bg);
    border-radius: var(--radius-sm);
    padding: 1.125rem 1.25rem;
    margin-bottom: 2rem;
}

.warning-notice-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: #92400E;
    margin-bottom: 0.5rem;
}

.warning-notice ul {
    margin: 0.5rem 0 0 1.25rem;
    font-size: 0.875rem;
    color: #92400E;
    opacity: 0.85;
}

.warning-notice li { margin-bottom: 0.2rem; }

.form-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-group { margin-bottom: 1.5rem; }

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-label span {
    color: var(--text-muted);
    font-weight: 400;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.7rem 0.875rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition), box-shadow var(--transition);
    line-height: 1.5;
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-muted); }

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px rgba(82, 183, 136, 0.12);
}

.form-textarea { min-height: 100px; resize: vertical; }

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

.form-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.form-checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--green-700);
    cursor: pointer;
}

.btn-primary {
    width: 100%;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    color: #fff;
    background: var(--green-900);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    letter-spacing: -0.01em;
}

.btn-primary:hover:not(:disabled) { background: var(--green-700); }

.btn-primary:active:not(:disabled) { transform: scale(0.99); }

.btn-primary:disabled {
    background: #D1D5DB;
    cursor: not-allowed;
}

.btn-primary.loading { position: relative; color: transparent; }

.btn-primary.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: white;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

.form-message {
    display: none;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    margin-top: 1rem;
    line-height: 1.5;
}

.form-message.success {
    display: block;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
}

.form-message.error {
    display: block;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
}

/* ─── FAQ ────────────────────────────────────────────────────────────── */
.faq { margin-top: 2.5rem; }

.faq-title {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.faq-item { padding: 1.125rem 0; border-top: 1px solid var(--border); }
.faq-item:last-child { border-bottom: 1px solid var(--border); }

.faq-q {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

.faq-a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.faq-a a { color: var(--green-700); }
.faq-a a:hover { color: var(--green-500); }

/* ─── Footer ─────────────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 2rem 1.5rem;
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: color var(--transition);
}

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

/* ─── Animations ─────────────────────────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-up { animation: fadeUp 0.55s cubic-bezier(0.22,1,0.36,1) both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* Scroll-triggered */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .hero { padding: 4rem 1.25rem 3rem; }

    .hero-title { font-size: 1.875rem; }

    .features { padding: 2.5rem 1.25rem 4rem; }

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

    .footer-inner { flex-direction: column; align-items: flex-start; }

    .nav-links { display: none; }
}