/* Shared styles for the Kids Safety: Parent Guide site.
   Palette is taken from the app itself: the cover gradient runs coral to
   violet, and chapter accents reuse the in-app chapter colours. */

:root {
    --coral: #ff6b6b;
    --violet: #6c5ce7;
    --amber: #ffb830;
    --teal: #4ecdc4;
    --ink: #1d1b2e;
    --body: #4a4761;
    --muted: #6f6b86;
    --surface: #ffffff;
    --page: #fdf7f4;
    --pink: #f78fb3;
    --line: rgba(29, 27, 46, 0.1);
    --radius: 20px;
    --shadow: 0 18px 40px rgba(29, 27, 46, 0.1);
    --shadow-lift: 0 26px 60px rgba(29, 27, 46, 0.16);
    --max: 960px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--page);
    color: var(--body);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    color: var(--ink);
    line-height: 1.2;
    margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }

p { margin: 0 0 1em; }

a {
    color: var(--violet);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

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

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header ------------------------------------------------------------------ */

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    background: var(--ink);
    color: #fff;
    padding: 12px 20px;
    border-radius: 0 0 12px 0;
    text-decoration: none;
    font-weight: 700;
}

.skip-link:focus {
    left: 0;
    color: #fff;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(253, 247, 244, 0.88);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--line);
    transition: box-shadow 0.35s var(--ease), background 0.35s var(--ease);
}

.site-header.is-scrolled {
    background: rgba(253, 247, 244, 0.94);
    box-shadow: 0 10px 30px rgba(29, 27, 46, 0.08);
}

.site-header .wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 66px;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

.brand img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    transition: transform 0.4s var(--ease);
}

.brand:hover img { transform: rotate(-6deg) scale(1.08); }

.site-nav {
    margin-left: auto;
    display: flex;
    gap: 20px;
    font-size: 0.95rem;
    font-weight: 600;
}

.site-nav a {
    color: var(--body);
    text-decoration: none;
}

.site-nav a {
    position: relative;
    padding-bottom: 2px;
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--coral), var(--violet));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s var(--ease);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
    transform: scaleX(1);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--coral);
}

/* Hero -------------------------------------------------------------------- */

.hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: linear-gradient(140deg, #ffb347 0%, var(--coral) 45%, #a05cd6 100%);
    color: #fff;
    padding: 88px 0 128px;
    text-align: center;
}

/* A second gradient drifts across the first one, so the backdrop breathes
   instead of sitting still. */
.hero-aurora {
    position: absolute;
    inset: -30%;
    z-index: -2;
    background:
        radial-gradient(38% 44% at 22% 28%, rgba(255, 214, 130, 0.85), transparent 62%),
        radial-gradient(42% 46% at 78% 22%, rgba(255, 107, 107, 0.75), transparent 64%),
        radial-gradient(46% 52% at 60% 82%, rgba(108, 92, 231, 0.8), transparent 66%);
    filter: blur(10px);
    animation: auroraDrift 24s ease-in-out infinite alternate;
}

.hero-blobs {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.blob-1 { width: 260px; height: 260px; top: -70px; left: -60px; animation: float 17s ease-in-out infinite; }
.blob-2 { width: 180px; height: 180px; bottom: 10px; right: -40px; animation: float 21s ease-in-out infinite reverse; }
.blob-3 { width: 120px; height: 120px; top: 46%; right: 16%; animation: float 13s ease-in-out infinite; }

/* Chapter emoji rise slowly through the hero, one per chapter theme. */
.hero-sparks {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.hero-sparks span {
    position: absolute;
    left: var(--x);
    bottom: -10%;
    font-size: var(--s);
    opacity: 0;
    filter: blur(0.3px) drop-shadow(0 2px 6px rgba(29, 27, 46, 0.2));
    animation: rise 22s linear infinite;
    animation-delay: var(--d);
}

.hero-inner {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero h1 {
    color: #fff;
    text-shadow: 0 6px 24px rgba(29, 27, 46, 0.22);
}

.hero p {
    font-size: 1.15rem;
    max-width: 34rem;
    margin: 0 auto 1.5em;
    color: rgba(255, 255, 255, 0.94);
}

.hero-icon-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: 24px;
    line-height: 0;
}

.hero-icon-glow {
    position: absolute;
    inset: -18px;
    border-radius: 40px;
    background: rgba(255, 255, 255, 0.35);
    filter: blur(18px);
    animation: pulse 4.5s ease-in-out infinite;
}

.hero-icon {
    position: relative;
    width: 108px;
    height: 108px;
    border-radius: 26px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.22);
    animation: bob 6s ease-in-out infinite;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

/* The wave hands the hero off to the page colour without a hard edge. */
.hero-wave {
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    width: 100%;
    height: 88px;
    display: block;
}

.hero-wave path { fill: var(--page); }

.eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 7px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.32);
    margin-bottom: 20px;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 26px;
}

.badge {
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 999px;
    padding: 8px 16px;
    font-size: 0.92rem;
    font-weight: 600;
    transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.badge:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.28);
}

/* Sections ---------------------------------------------------------------- */

main { padding: 56px 0 24px; }

section { margin-bottom: 56px; }

.lede {
    font-size: 1.08rem;
    color: var(--muted);
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
}

.grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid .card { margin: 0; }

.card h3 { margin-bottom: 0.35em; }

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

.chapter-list {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    padding: 0;
    margin: 0;
    list-style: none;
}

.chapter-list li {
    position: relative;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px 16px 14px 22px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--ink);
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

/* Each chapter carries its in-app accent colour on the leading edge. */
.chapter-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    background: var(--accent, var(--violet));
    transform: scaleY(0.35);
    transform-origin: center;
    transition: transform 0.35s var(--ease);
}

.chapter-list li:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent, var(--violet)) 40%, transparent);
    box-shadow: 0 16px 32px rgba(29, 27, 46, 0.12);
}

.chapter-list li:hover::before { transform: scaleY(1); }

.chapter-list li:hover .emoji { transform: scale(1.18) rotate(-8deg); }

.chapter-list .count {
    margin-left: auto;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--muted);
}

.chapter-list .count.free {
    color: #0f8f6f;
    background: rgba(78, 205, 196, 0.16);
    border-radius: 999px;
    padding: 3px 10px;
}

.emoji {
    font-size: 1.3rem;
    line-height: 1;
    transition: transform 0.35s var(--ease);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.96rem;
}

.table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

th, td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

th {
    color: var(--ink);
    font-weight: 700;
    background: rgba(108, 92, 231, 0.06);
}

tbody tr:last-child td { border-bottom: 0; }

ul.plain {
    padding-left: 1.15em;
    margin: 0 0 1em;
}

ul.plain li { margin-bottom: 0.45em; }

.note {
    border-left: 4px solid var(--amber);
    background: #fff8e7;
    border-radius: 0 14px 14px 0;
    padding: 16px 20px;
}

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

.updated {
    font-size: 0.9rem;
    color: var(--muted);
}

.btn {
    display: inline-block;
    position: relative;
    overflow: hidden;
    background: var(--ink);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    padding: 14px 26px;
    border-radius: 999px;
    box-shadow: var(--shadow);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}

/* A highlight sweeps across the button on hover. */
.btn::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: -60%;
    width: 45%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
    transform: skewX(-18deg);
    transition: left 0.6s var(--ease);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lift);
    background: var(--violet);
    color: #fff;
}

.btn:hover::after { left: 120%; }

.btn:active { transform: translateY(0); }

.btn.light {
    background: #fff;
    color: var(--coral);
}

.btn.light:hover { background: #fff; color: var(--violet); }

.btn.ghost {
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.45);
    box-shadow: none;
}

.btn.ghost:hover {
    background: rgba(255, 255, 255, 0.28);
    color: #fff;
}

/* Stats ------------------------------------------------------------------- */

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px 18px;
    margin-top: -76px;
    margin-bottom: 56px;
    position: relative;
    z-index: 2;
}

.stat {
    text-align: center;
    padding: 6px 8px;
}

.stat-num {
    display: block;
    font-size: clamp(1.7rem, 4vw, 2.3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    background: linear-gradient(120deg, var(--coral), var(--violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

/* Feature cards ----------------------------------------------------------- */

.card.tilt {
    position: relative;
    overflow: hidden;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.card.tilt::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent, var(--violet)), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s var(--ease);
}

.card.tilt:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lift);
}

.card.tilt:hover::before { transform: scaleX(1); }

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    font-size: 1.35rem;
    margin-bottom: 14px;
    background: color-mix(in srgb, var(--accent, var(--violet)) 14%, #fff);
    transition: transform 0.4s var(--ease);
}

.card.tilt:hover .card-icon { transform: translateY(-2px) rotate(-6deg); }

/* Steps ------------------------------------------------------------------- */

.steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    counter-reset: step;
}

.steps li {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px 22px;
    box-shadow: var(--shadow);
}

.steps h3 { margin-bottom: 0.3em; }

.steps p { margin: 0; color: var(--body); }

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--coral), var(--violet));
    color: #fff;
    font-weight: 800;
    margin-bottom: 14px;
}

/* Plans ------------------------------------------------------------------- */

.plans {
    display: grid;
    gap: 18px;
    align-items: start;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.plan {
    position: relative;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.plan:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
}

.plan-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(108, 92, 231, 0.12);
    color: var(--violet);
    margin-bottom: 12px;
}

.plan.featured {
    border-color: transparent;
    background:
        linear-gradient(#fff, #fff) padding-box,
        linear-gradient(135deg, var(--coral), var(--violet)) border-box;
    border: 2px solid transparent;
}

.plan.featured .plan-tag {
    background: linear-gradient(120deg, var(--coral), var(--violet));
    color: #fff;
}

.plan-note {
    margin: 0;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    font-size: 0.95rem;
    color: var(--muted);
}

/* Closing call to action -------------------------------------------------- */

.cta-band {
    position: relative;
    overflow: hidden;
    text-align: center;
    border-radius: var(--radius);
    padding: 44px 24px;
    color: #fff;
    background: linear-gradient(135deg, var(--coral), var(--violet));
    background-size: 180% 180%;
    animation: auroraShift 14s ease infinite;
    box-shadow: var(--shadow);
}

.cta-band h2 { color: #fff; margin-bottom: 0.3em; }

.cta-band p {
    color: rgba(255, 255, 255, 0.92);
    max-width: 30rem;
    margin: 0 auto 1.4em;
}

/* Motion ------------------------------------------------------------------ */

.reveal {
    opacity: 0;
    transform: translateY(22px);
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    transition-delay: calc(var(--stagger, 0) * 80ms);
}

.reveal[data-delay="1"] { --stagger: 1; }
.reveal[data-delay="2"] { --stagger: 2; }
.reveal[data-delay="3"] { --stagger: 3; }
.reveal[data-delay="4"] { --stagger: 4; }
.reveal[data-delay="5"] { --stagger: 5; }
.reveal[data-delay="6"] { --stagger: 6; }
.reveal[data-delay="7"] { --stagger: 7; }

/* No JavaScript means no hidden content. */
html:not(.js) .reveal { opacity: 1; transform: none; }

@keyframes auroraDrift {
    0%   { transform: translate3d(-3%, -2%, 0) scale(1); }
    50%  { transform: translate3d(3%, 2%, 0) scale(1.08); }
    100% { transform: translate3d(-2%, 3%, 0) scale(1.02); }
}

@keyframes auroraShift {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

@keyframes float {
    0%, 100% { transform: translate3d(0, 0, 0); }
    50%      { transform: translate3d(14px, -22px, 0); }
}

@keyframes rise {
    0%   { opacity: 0; transform: translate3d(0, 0, 0) rotate(0deg); }
    14%  { opacity: 0.38; }
    82%  { opacity: 0.22; }
    100% { opacity: 0; transform: translate3d(24px, -110vh, 0) rotate(22deg); }
}

@keyframes bob {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-10px) rotate(2deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.45; transform: scale(0.95); }
    50%      { opacity: 0.8; transform: scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }

    .reveal { opacity: 1; transform: none; }
    .hero-sparks { display: none; }
}

/* Footer ------------------------------------------------------------------ */

.site-footer {
    border-top: 1px solid var(--line);
    padding: 32px 0 48px;
    font-size: 0.92rem;
    color: var(--muted);
}

.site-footer .wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 24px;
    align-items: center;
}

.site-footer nav {
    margin-left: auto;
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.site-footer a { color: var(--body); }

@media (max-width: 560px) {
    .site-nav { width: 100%; margin-left: 0; gap: 16px; }
    .site-footer nav { margin-left: 0; }
    .hero { padding: 60px 0 96px; }
    .hero-wave { height: 56px; }
    .hero-actions .btn { width: 100%; text-align: center; }
    .stats {
        grid-template-columns: repeat(2, 1fr);
        margin-top: -56px;
        padding: 20px 12px;
    }
    .blob-1, .blob-2, .blob-3 { display: none; }
}