/* Birchtree Productions - app sub-page calm styles.
   Loaded by app sub-pages under apps/ (never by index.html). Every rule is
   scoped under .calm-app so these styles cannot reach the homepage or leak
   between pages. Self-contained: reset, tokens, and components live here, so
   pages that load this drop styles.css entirely.
   Verified by tools/check-isolation.py. */

/* ---------- Reset (scoped) ---------- */
body.calm-app,
.calm-app *,
.calm-app *::before,
.calm-app *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body.calm-app {
    /* Surfaces */
    --color-ground: #f7f7f7;
    --color-card: #ffffff;
    --color-panel: #f0f0f2;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-border: #d7dbe2;

    /* Ink (accent is per-app, defaults to the brand purple) */
    --accent: var(--app-accent, rgb(136, 57, 239));

    /* Radii */
    --radius-panel: 2.4rem;
    --radius-card: 2rem;
    --radius-image: 1.5rem;
    --radius-pill: 99999px;

    /* Rhythm */
    --pad-card: clamp(1.5rem, 4vw, 4rem);
    --gap-section: clamp(2rem, 5vw, 5rem);

    /* Type */
    --font-sans: 'Atkinson Hyperlegible Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Fraunces', Georgia, serif;

    background-color: var(--color-ground);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.calm-app img {
    display: block;
    max-width: 100%;
}

.calm-app a {
    color: inherit;
    text-decoration: none;
}

.calm-app :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ---------- Pill nav ---------- */
.calm-app .app-nav {
    position: fixed;
    top: clamp(1rem, 2.5vw, 2.4rem);
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    max-width: calc(100vw - 2rem);
    background: var(--color-card);
    border-radius: var(--radius-pill);
    z-index: 5000;
}

.calm-app .app-nav-container {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
    padding: clamp(0.6rem, 1.2vw, 0.9rem) clamp(1rem, 2.5vw, 1.6rem);
}

.calm-app .app-nav-back {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: clamp(0.75rem, 1.1vw, 0.875rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--color-text-secondary);
    white-space: nowrap;
    transition: color 0.2s ease;
}

.calm-app .app-nav-back:hover {
    color: var(--color-text);
}

.calm-app .app-nav-back svg {
    width: 1rem;
    height: 1rem;
}

.calm-app .app-nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-left: clamp(0.7rem, 1.5vw, 1.4rem);
    border-left: 1px solid var(--color-border);
    font-size: clamp(0.85rem, 1.4vw, 1rem);
    font-weight: 700;
    white-space: nowrap;
}

.calm-app .app-nav-brand img {
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 22%;
}

.calm-app .app-nav-links {
    display: flex;
    align-items: center;
    gap: clamp(0.8rem, 1.6vw, 1.4rem);
    list-style: none;
}

.calm-app .app-nav-links a {
    font-size: clamp(0.75rem, 1.1vw, 0.875rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

@media (max-width: 640px) {
    .calm-app .app-nav-back span,
    .calm-app .app-nav-brand span {
        display: none;
    }
}

/* ---------- Pill buttons ---------- */
.calm-app .btn-dot,
.calm-app .btn-fill {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.9rem 1.4rem;
    border-radius: var(--radius-pill);
    font-size: clamp(0.8rem, 1.1vw, 0.95rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: border-color 0.25s ease, background-color 0.25s ease,
                transform 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.calm-app .btn-dot {
    border: 1px solid #8c8c8c;
    background: var(--color-card);
    color: #000;
}

.calm-app .btn-dot::after {
    content: "";
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: #000;
    transition: background-color 0.25s ease, transform 0.25s ease;
}

.calm-app .btn-dot:hover {
    border-color: var(--accent);
}

.calm-app .btn-dot:hover::after {
    background: var(--accent);
    transform: scale(1.6);
}

.calm-app .btn-fill {
    border: 1px solid var(--color-text);
    background: var(--color-text);
    color: #fff;
}

.calm-app .btn-fill:hover {
    background: #000;
    border-color: #000;
}

.calm-app .download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.calm-app .download-buttons svg {
    width: 1.15rem;
    height: 1.15rem;
}

/* ---------- Hero (icon stage) ---------- */
.calm-app .app-hero {
    position: relative;
    margin: clamp(0.5rem, 1.5vw, 1rem);
    margin-top: clamp(6rem, 12vw, 9rem);
    padding: clamp(2.5rem, 6vw, 5rem) clamp(1.5rem, 4vw, 4rem);
    border-radius: var(--radius-panel);
    background: var(--color-panel);
    text-align: center;
}

.calm-app .app-hero-inner {
    max-width: 40rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.calm-app .app-hero-icon {
    width: clamp(96px, 12vw, 148px);
    height: auto;
    border-radius: 22%;
}

/* Pure-CSS entrance: pops once on load, then rests. No JS dependency, so a
   script failure can never strand the icon invisible. Reduced motion skips it
   and the icon is simply present (default opacity/scale). */
@media (prefers-reduced-motion: no-preference) {
    .calm-app .app-hero-icon {
        animation: app-icon-pop 0.6s cubic-bezier(0.34, 1.25, 0.5, 1) both;
    }
}

@keyframes app-icon-pop {
    from { opacity: 0; transform: scale(0.6); }
    to { opacity: 1; transform: scale(1); }
}

.calm-app .app-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.08;
}

.calm-app .accent-line {
    color: var(--accent);
}

.calm-app .app-hero-subtitle {
    font-size: clamp(1.05rem, 1.6vw, 1.25rem);
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 34rem;
}

.calm-app .hero-screenshot {
    margin: var(--gap-section) auto 0;
    max-width: 960px;
    padding: 0 clamp(0.5rem, 2vw, 1rem);
}

.calm-app .hero-screenshot img {
    width: 100%;
    border-radius: var(--radius-image);
    max-height: 620px;
    object-fit: cover;
    object-position: top;
}

/* ---------- Reveal (fade + rise) ---------- */
/* Copy reveals by fading up a little. This deliberately does NOT use a
   left-to-right clip-path wipe: on the centered app-page hero copy a clip
   wipe visibly cut glyphs during the reveal (the leading letter clipped),
   so it was replaced with a fade that can never clip a letter. (The homepage
   keeps its clip wipe because its copy is right-aligned in a narrow box.)

   Fail-safe: .wipe copy is VISIBLE by default; hiding is armed only once
   app.js adds .is-armed. Section headers carry .scroll-reveal on an
   observer-target ancestor and .revealed cascades to the .wipe children; a
   3s .is-revealed-all fallback reveals everything if the observer never
   fires. Each motion preference owns its own gated rules so the reduced
   path wins without a specificity fight. */

.calm-app .section-header.scroll-reveal {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (prefers-reduced-motion: no-preference) {
    .calm-app.is-armed .wipe {
        opacity: 0;
        transform: translateY(0.5rem);
        transition: opacity 0.6s ease,
                    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .calm-app .section-header.revealed .wipe,
    .calm-app .wipe.revealed,
    .calm-app.is-loaded .app-hero .wipe,
    .calm-app.is-revealed-all .wipe {
        opacity: 1;
        transform: none;
    }

    .calm-app .app-hero .app-hero-title.wipe { transition-delay: 0.15s; }
    .calm-app .app-hero .app-hero-subtitle.wipe { transition-delay: 0.3s; }
    .calm-app .section-header .wipe:nth-child(2) { transition-delay: 0.08s; }
    .calm-app .section-header .wipe:nth-child(3) { transition-delay: 0.16s; }
}

@media (prefers-reduced-motion: reduce) {
    .calm-app.is-armed .wipe {
        opacity: 0;
        transition: opacity 0.4s ease;
    }

    .calm-app .section-header.revealed .wipe,
    .calm-app .wipe.revealed,
    .calm-app.is-loaded .app-hero .wipe,
    .calm-app.is-revealed-all .wipe {
        opacity: 1;
    }
}

/* ---------- Sections ---------- */
.calm-app .section {
    padding: var(--gap-section) clamp(0.5rem, 1.5vw, 1rem);
}

.calm-app .section-header {
    max-width: 46rem;
    margin: 0 auto var(--gap-section);
    text-align: center;
}

/* Scrambled glyphs are not the real glyph widths, so the label reserves space
   to stop the heading below it jittering while it shuffles. */
.calm-app .section-label {
    display: inline-block;
    min-width: 6ch;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.calm-app .section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.calm-app .section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0.75rem auto 0;
    max-width: 40rem;
}

/* ---------- Feature rows ---------- */
.calm-app .feature-row {
    max-width: 1000px;
    margin: 0 auto clamp(1rem, 2vw, 2rem);
    background: var(--color-card);
    border-radius: var(--radius-card);
    padding: var(--pad-card);
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 3.5rem);
}

.calm-app .feature-row.feature-flip .feature-row-media {
    order: -1;
}

.calm-app .feature-title {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.calm-app .feature-description {
    font-size: clamp(1rem, 1.4vw, 1.1rem);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-top: 0.75rem;
}

.calm-app .feature-description a {
    color: var(--accent);
    text-decoration: underline;
}

.calm-app .feature-row-media {
    border-radius: var(--radius-image);
    overflow: hidden;
    will-change: transform;
}

.calm-app .feature-row-media img {
    width: 100%;
    border-radius: var(--radius-image);
    max-height: 480px;
    object-fit: cover;
    object-position: top;
}

/* ---------- Feature grid ---------- */
.calm-app .features-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(1rem, 2vw, 1.5rem);
}

.calm-app .feature-card {
    background: var(--color-card);
    border-radius: var(--radius-card);
    padding: clamp(1.5rem, 3vw, 2rem);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.calm-app .feature-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 1rem;
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.calm-app .feature-card-icon i {
    font-size: 24px;
    color: var(--accent);
}

.calm-app .feature-card-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.calm-app .feature-card-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.calm-app .feature-card-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #16a34a;
}

/* Accent tier badge (e.g. "Premium"), for paid/upgrade labels. Distinct from
   .feature-card-badge, whose green reads as an availability/status colour. */
.calm-app .badge-accent {
    display: inline-block;
    padding: 0.05rem 0.45rem;
    border-radius: 0.5rem;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    vertical-align: middle;
}

/* ---------- Chips (small labelled pills, optionally with a colour dot) ----------
   Generic row of pill chips: platform lists, file formats, feature tags. The
   dot colour is set per chip via --chip-dot (defaults to the app accent). */
.calm-app .chip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
}

.calm-app .chip {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    font-size: 0.85rem;
    font-weight: 700;
    white-space: nowrap;
}

.calm-app .chip-dot {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: var(--chip-dot, var(--accent));
    flex: none;
}

.calm-app .chip-arrow {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-secondary);
}

/* Card cascade: armed (hidden) only when JS is running; visible otherwise. */
.calm-app.is-armed .feature-card.scroll-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.calm-app.is-armed .feature-card.scroll-reveal.revealed,
.calm-app.is-revealed-all .feature-card.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
}

.calm-app .features-grid .feature-card:nth-child(1).revealed { transition-delay: 0s; }
.calm-app .features-grid .feature-card:nth-child(2).revealed { transition-delay: 0.06s; }
.calm-app .features-grid .feature-card:nth-child(3).revealed { transition-delay: 0.12s; }
.calm-app .features-grid .feature-card:nth-child(4).revealed { transition-delay: 0.18s; }
.calm-app .features-grid .feature-card:nth-child(5).revealed { transition-delay: 0.24s; }
.calm-app .features-grid .feature-card:nth-child(6).revealed { transition-delay: 0.30s; }

/* ---------- Pricing ---------- */
.calm-app .pricing-cards {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(1rem, 2vw, 1.5rem);
    justify-content: center;
    align-items: flex-start;
    max-width: 1000px;
    margin: 0 auto;
}

.calm-app .pricing-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: clamp(1.5rem, 3vw, 2.25rem);
    width: 100%;
    max-width: 340px;
    text-align: center;
}

.calm-app .pricing-card-featured {
    border-color: var(--accent);
}

.calm-app .pricing-toggle {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.calm-app .pricing-toggle-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    background: var(--color-card);
    color: var(--color-text);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease,
                transform 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.calm-app .pricing-toggle-btn.active {
    background: var(--color-text);
    color: #fff;
    border-color: var(--color-text);
}

.calm-app .pricing-swap {
    transition: opacity 0.15s ease;
}

.calm-app .pricing-swap.swapping {
    opacity: 0;
}

.calm-app .pricing-card-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.calm-app .pricing-save {
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    padding: 0.1rem 0.5rem;
    border-radius: 0.5rem;
    font-size: 0.7rem;
    margin-left: 0.35rem;
}

.calm-app .pricing-card-price {
    font-size: clamp(2.2rem, 5vw, 2.8rem);
    font-weight: 700;
    line-height: 1;
}

.calm-app .pricing-card-price .unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-secondary);
}

.calm-app .pricing-card-period {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: 0.4rem;
}

.calm-app .pricing-features {
    list-style: none;
    margin: 1.5rem 0 0;
    padding: 0;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.calm-app .pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.calm-app .pricing-features li.is-off {
    opacity: 0.5;
}

.calm-app .pricing-cta {
    margin-top: 1.5rem;
}

.calm-app .pricing-cta .btn-dot,
.calm-app .pricing-cta .btn-fill {
    width: 100%;
    justify-content: center;
}

/* ---------- CTA ---------- */
.calm-app .cta {
    max-width: 1000px;
    margin: var(--gap-section) auto;
    background: var(--color-card);
    border-radius: var(--radius-card);
    padding: clamp(2.5rem, 6vw, 4rem) var(--pad-card);
    text-align: center;
}

.calm-app .cta-copy {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: var(--color-text-secondary);
    margin: 0.75rem auto 1.75rem;
    max-width: 34rem;
}

/* ---------- Footer ---------- */
.calm-app .app-footer {
    background: var(--color-card);
    border-radius: var(--radius-card);
    margin: var(--gap-section) clamp(0.5rem, 1.5vw, 1rem) clamp(0.5rem, 1.5vw, 1rem);
    padding: clamp(1.5rem, 3vw, 2rem) var(--pad-card);
}

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

.calm-app .app-footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
}

.calm-app .app-footer-brand img {
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 22%;
}

.calm-app .app-footer-links {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.calm-app .app-footer-links a {
    color: var(--color-text-secondary);
}

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

.calm-app .app-footer-sep {
    color: var(--color-border);
}

/* ---------- Motion polish ---------- */
@media (prefers-reduced-motion: no-preference) {
    .calm-app .btn-dot:active,
    .calm-app .btn-fill:active,
    .calm-app .pricing-toggle-btn:active {
        transform: scale(0.97);
    }
}

@media (hover: hover) and (pointer: fine) {
    .calm-app .feature-card-icon {
        transition: transform 0.22s cubic-bezier(0.34, 1.25, 0.5, 1);
    }

    .calm-app .feature-card:hover .feature-card-icon {
        transform: scale(1.06) rotate(-2deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .calm-app .feature-card:hover .feature-card-icon {
        transform: none;
    }

    /* Card cascade: fade only, no slide. */
    .calm-app.is-armed .feature-card.scroll-reveal {
        transform: none;
        transition: opacity 0.4s ease;
    }

    .calm-app.is-armed .feature-card.scroll-reveal.revealed {
        transform: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .calm-app .feature-row {
        grid-template-columns: 1fr;
        gap: clamp(1.25rem, 4vw, 2rem);
    }

    .calm-app .feature-row .feature-row-media {
        order: -1;
    }

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

    .calm-app .app-nav-links {
        display: none;
    }

    .calm-app .app-footer-container {
        flex-direction: column;
        text-align: center;
    }

    .calm-app .pricing-cards {
        flex-direction: column;
        align-items: center;
    }
}