theme.css

/* ==========================================================================
   FB4KDownloader Theme v4 | navy hero + amber action, light page body
   Mobile-first. Breakpoints: 640px, 900px (nav), 960px (hero split). No external deps.
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --navy: #0e1836;
  --navy-2: #16224a;
  --navy-line: #27365f;
  --on-navy: #eef1fb;
  --on-navy-muted: #aab5d8;
  --bg: #ffffff;
  --surface: #f4f6fb;
  --ink: #101828;
  --muted: #596579;
  --line: #e2e6ef;
  --accent: #ffb020;
  --accent-dark: #f29b00;
  --on-accent: #1b1300;
  --link: #2f4fd1;
  --ok: #13875a;
  --err: #c0392b;

  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(15, 27, 51, .06), 0 12px 28px -14px rgba(15, 27, 51, .22);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --wrap: 1120px;
  --header-h: 60px;

  /* fluid type scale */
  --fs-sm: clamp(.8rem, .78rem + .1vw, .87rem);
  --fs-base: clamp(.96rem, .94rem + .12vw, 1.04rem);
  --fs-h1: clamp(1.9rem, 1.2rem + 3vw, 3.1rem);
  --fs-h2: clamp(1.35rem, 1.15rem + .9vw, 1.9rem);
  --fs-h3: clamp(1.05rem, 1rem + .35vw, 1.25rem);
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 12px);
  color-scheme: light;
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; height: auto; }
h1, h2, h3, h4, p, li, a, summary { overflow-wrap: break-word; }
h1, h2, h3, h4 { text-wrap: balance; margin: 0 0 .45em; line-height: 1.2; font-weight: 750; letter-spacing: -.02em; }
h1 { font-size: var(--fs-h1); font-weight: 800; letter-spacing: -.035em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: 1.05rem; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
a { color: var(--link); text-underline-offset: 3px; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid #8aa2ff; outline-offset: 2px; border-radius: 6px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(16px, 4vw, 28px); }
.sr-only { position: absolute !important; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 200; background: #fff; color: var(--ink); padding: 8px 14px; border-radius: 8px; }
.skip-link:focus { top: 8px; }

/* ---------- 3. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 20px; border: 1px solid transparent; border-radius: 10px;
  font-weight: 700; font-size: .96rem; line-height: 1; text-decoration: none; white-space: nowrap;
  transition: background-color .15s, border-color .15s, transform .1s;
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-accent { background: var(--accent); color: var(--on-accent); }
.btn-accent:hover { background: var(--accent-dark); color: var(--on-accent); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: #c4cce0; }
.btn-line-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .35); }
.btn-line-light:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.btn-sm { min-height: 38px; padding: 0 14px; font-size: .88rem; }

/* ==========================================================================
   4. HEADER
   ========================================================================== */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--navy); border-bottom: 1px solid var(--navy-line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 800; font-size: 1.1rem; letter-spacing: -.02em; white-space: nowrap; }
.brand:hover { color: #fff; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand b { color: var(--accent); font-weight: 800; }

.nav-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; background: transparent; border: 1px solid var(--navy-line); border-radius: 10px; padding: 0; }
.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after { display: block; width: 18px; height: 2px; background: #fff; border-radius: 2px; transition: transform .2s, background-color .2s; }
.nav-toggle .bars { position: relative; }
.nav-toggle .bars::before, .nav-toggle .bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle .bars::before { top: -6px; }
.nav-toggle .bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bars::after { transform: translateY(-6px) rotate(-45deg); }

.nav {
  position: absolute; left: 0; right: 0; top: 100%;
  display: none; flex-direction: column; gap: 12px;
  max-height: calc(100vh - var(--header-h)); max-height: calc(100dvh - var(--header-h)); overflow-y: auto;
  padding: 6px clamp(16px, 4vw, 28px) 20px;
  background: var(--navy-2); border-bottom: 1px solid var(--navy-line);
}
.nav.is-open { display: flex; }
.nav-list { display: flex; flex-direction: column; }
.nav-list > li { border-bottom: 1px solid var(--navy-line); }
.nav-list > li:last-child { border-bottom: 0; }
.nav-list a, .menu-btn {
  display: flex; align-items: center; justify-content: space-between; width: 100%; min-height: 48px; padding: 0 2px;
  color: var(--on-navy); font-weight: 600; text-decoration: none; background: none; border: 0; text-align: left;
}
.nav-list a[aria-current="page"] { color: var(--accent); }
.menu-btn svg { width: 16px; height: 16px; transition: transform .2s; }
.menu-btn[aria-expanded="true"] svg { transform: rotate(180deg); }
.submenu { display: none; padding: 0 0 8px 12px; }
.submenu.is-open { display: block; }
.submenu a { min-height: 42px; font-weight: 500; color: var(--on-navy-muted); }
.nav-cta { width: 100%; }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .nav {
    position: static; display: flex; flex-direction: row; align-items: center; gap: 14px;
    max-height: none; overflow: visible; padding: 0; background: none; border: 0;
  }
  .nav-list { flex-direction: row; align-items: center; gap: 2px; }
  .nav-list > li { border: 0; position: relative; }
  .nav-list a, .menu-btn { width: auto; min-height: 38px; padding: 0 12px; gap: 6px; border-radius: 8px; font-size: .92rem; font-weight: 550; color: var(--on-navy-muted); }
  .nav-list a:hover, .menu-btn:hover { color: #fff; background: rgba(255, 255, 255, .07); }
  .nav-list a[aria-current="page"] { color: #fff; background: rgba(255, 255, 255, .1); }
  .submenu { position: absolute; right: 0; top: calc(100% + 10px); min-width: 210px; padding: 6px; background: #fff; border-radius: var(--radius); box-shadow: 0 18px 40px -12px rgba(0, 0, 0, .45); }
  .submenu a { min-height: 38px; color: var(--ink); }
  .submenu a:hover { background: var(--surface); color: var(--ink); }
  .nav-cta { width: auto; }
}

/* ==========================================================================
   5. HERO + TOOL
   ========================================================================== */
.hero {
  color: var(--on-navy);
  background: radial-gradient(700px 360px at 85% -10%, rgba(80, 110, 255, .28), rgba(80, 110, 255, 0) 70%), var(--navy);
  padding: clamp(32px, 6vw, 72px) 0 clamp(36px, 6vw, 72px);
}
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero h1 { color: #fff; margin-bottom: .35em; }
.hero .lead { max-width: 52ch; margin-bottom: clamp(18px, 3vw, 26px); color: var(--on-navy-muted); font-size: clamp(1rem, .96rem + .25vw, 1.15rem); }

.tool-form { display: flex; flex-wrap: wrap; gap: 8px; padding: 8px; background: #fff; border-radius: 14px; box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .6); }
.field { position: relative; flex: 1 1 100%; min-width: 0; display: flex; align-items: center; }
.field .icon-link { position: absolute; left: 12px; width: 19px; height: 19px; color: #7a869b; pointer-events: none; }
.field input { width: 100%; height: 50px; padding: 0 86px 0 40px; font: inherit; font-size: 16px; color: var(--ink); background: var(--surface); border: 1.5px solid transparent; border-radius: 9px; }
.field input::placeholder { color: #7a869b; }
.field input:focus { outline: none; background: #fff; border-color: var(--link); }
.paste-btn { position: absolute; right: 6px; height: 38px; padding: 0 12px; background: #fff; color: var(--ink); border: 1px solid var(--line); border-radius: 7px; font-weight: 650; font-size: .85rem; }
.paste-btn:hover { background: var(--surface); }
.tool-form .btn-accent { flex: 1 1 100%; min-height: 50px; font-size: 1rem; }
@media (min-width: 640px) {
  .tool-form { flex-wrap: nowrap; }
  .field { flex: 1 1 auto; }
  .tool-form .btn-accent { flex: 0 0 auto; min-width: 156px; }
}

.tool-msg { margin: 10px 4px 0; font-size: var(--fs-sm); color: var(--on-navy-muted); }
.tool-msg:empty { display: none; }
.tool-msg.is-error { color: #ffb4a8; }
.tool-msg.is-ok { color: #7ee2b8; }
.hint { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 14px 0 0; color: var(--on-navy-muted); font-size: var(--fs-sm); }
.hint span { display: inline-flex; align-items: center; gap: 6px; }
.hint svg { width: 15px; height: 15px; color: #7ee2b8; flex: none; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.chip { padding: 4px 11px; border: 1px solid var(--navy-line); border-radius: 999px; background: rgba(255, 255, 255, .04); color: var(--on-navy); font-size: var(--fs-sm); font-weight: 600; }
.chip.hot { border-color: rgba(255, 176, 32, .5); color: var(--accent); }

/* Phone visual */
.visual { display: none; }
@keyframes sheetUp { from { transform: translateY(70%); } to { transform: translateY(0); } }
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.2fr .8fr; gap: 56px; }
  .visual { display: grid; place-items: center; }
  .phone { position: relative; width: min(260px, 100%); aspect-ratio: 9 / 18; padding: 8px; border-radius: 36px; background: #1d2b5c; box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .7), inset 0 0 0 1px #34457f; }
  .screen { position: relative; height: 100%; overflow: hidden; border-radius: 29px; background: linear-gradient(160deg, #4357e0 0%, #232f8a 50%, #0e1836 100%); }
  .notch { position: absolute; left: 50%; top: 9px; width: 70px; height: 18px; border-radius: 99px; background: #0a1128; transform: translateX(-50%); }
  .play { position: absolute; left: 50%; top: 24%; width: 62px; height: 62px; display: grid; place-items: center; border-radius: 50%; background: rgba(255, 255, 255, .18); transform: translateX(-50%); }
  .play svg { width: 26px; height: 26px; color: #fff; margin-left: 3px; }
  .dur { position: absolute; left: 14px; top: 40px; padding: 1px 8px; border-radius: 6px; background: rgba(0, 0, 0, .35); color: #fff; font-size: .7rem; }
  .sheet { position: absolute; left: 0; right: 0; bottom: 0; padding: 10px 14px 16px; border-radius: 22px 22px 0 0; background: #fff; color: var(--ink); animation: sheetUp .9s cubic-bezier(.2, .8, .2, 1) both; }
  .sheet .grab { display: block; width: 36px; height: 4px; margin: 0 auto 10px; border-radius: 9px; background: #d5dae6; }
  .sheet b { display: block; margin-bottom: 6px; font-size: .9rem; }
  .sheet li { display: flex; justify-content: space-between; padding: 8px 0; border-top: 1px solid var(--line); font-size: .82rem; }
  .sheet li em { color: var(--muted); font-style: normal; }
  .sheet-btn { display: block; margin-top: 8px; padding: 10px; border-radius: 9px; background: var(--accent); color: var(--on-accent); text-align: center; font-weight: 800; font-size: .85rem; }
}

/* Result Card */
.result { margin-top: 18px; color: var(--ink); }
.result[hidden] { display: none; }
.result-card { display: grid; gap: 16px; padding: 14px; background: #fff; border-radius: 14px; box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .6); }
.thumb { position: relative; aspect-ratio: 16 / 9; border-radius: 9px; background: var(--surface) center / cover no-repeat; overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .time { position: absolute; right: 8px; bottom: 8px; padding: 2px 7px; border-radius: 5px; background: rgba(0, 0, 0, .72); color: #fff; font-size: .75rem; }
.result-title { margin: 0 0 2px; font-size: 1.05rem; color: var(--ink); }
.result-meta { margin: 0 0 12px; color: var(--muted); font-size: var(--fs-sm); }
.format-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.format-row:first-child { border-top: 0; padding-top: 0; }
.format-row strong { display: block; line-height: 1.3; }
.format-row small { color: var(--muted); font-size: var(--fs-sm); }
.badge { margin-left: 6px; padding: 1px 7px; border-radius: 999px; background: #fff3d6; color: #8a5a00; font-size: .7rem; font-weight: 700; vertical-align: 1px; }
@media (min-width: 640px) { .result-card { grid-template-columns: 5fr 7fr; align-items: start; } }

/* Ad slot */
.ad-slot { display: grid; place-items: center; min-height: 90px; margin-top: 22px; border: 1px dashed var(--navy-line); border-radius: var(--radius); color: var(--on-navy-muted); font-size: .72rem; }
.ad-slot:empty::before { content: "Advertisement"; }

/* Native ad wrapper support */
.native-ad-wrapper {
  margin: 22px auto; max-width: 820px; width: 100%; text-align: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 16px;
  overflow: hidden; box-shadow: var(--shadow);
}
.native-ad-label { display: block; font-size: .75rem; color: var(--muted); text-transform: uppercase; margin-bottom: 8px; font-weight: 700; }

/* Loading Animation */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.btn.is-loading { pointer-events: none; opacity: .9; }
.btn.is-loading svg { display: none; }
.btn.is-loading::before { content: ""; width: 16px; height: 16px; border: 2.5px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
.thumb.is-loading { background: linear-gradient(90deg, #eef1f8 25%, #e1e6f2 37%, #eef1f8 63%); background-size: 400% 100%; animation: shimmer 1.2s ease infinite; }

/* ==========================================================================
   6. TRUST STRIP & CONTENT SECTIONS
   ========================================================================== */
.strip { background: var(--bg); border-bottom: 1px solid var(--line); }
.strip ul { display: grid; grid-template-columns: 1fr 1fr; }
.strip li { display: flex; align-items: center; gap: 12px; padding: 16px 8px; }
.strip svg { width: 26px; height: 26px; flex: none; color: var(--link); }
.strip b { display: block; line-height: 1.25; font-size: .95rem; }
.strip small { color: var(--muted); font-size: var(--fs-sm); }
@media (min-width: 900px) { .strip ul { grid-template-columns: repeat(4, 1fr); } .strip li { padding: 20px 12px; } }

.section { padding: clamp(36px, 6vw, 68px) 0; }
.section.alt { background: var(--surface); }
.section-head { max-width: 60ch; margin-bottom: clamp(20px, 3.5vw, 32px); }
.section-head p { margin: 0; color: var(--muted); }

/* Steps */
.steps { display: grid; gap: 14px; }
.steps li { display: flex; gap: 16px; padding: 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; }
.steps .n { flex: none; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; background: var(--navy); color: var(--accent); font-weight: 800; }
.steps h3 { margin-bottom: 2px; }
.steps p { margin: 0; color: var(--muted); font-size: .95rem; }
@media (min-width: 800px) { .steps { grid-template-columns: repeat(3, 1fr); } .steps li { flex-direction: column; gap: 12px; } }

/* Comparison bars */
.bars { display: grid; gap: 14px; max-width: 820px; }
.bar-row { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "label val" "track track"; gap: 6px 12px; align-items: baseline; }
.bar-row b { grid-area: label; font-weight: 650; }
.bar-row b small { margin-left: 8px; color: var(--muted); font-weight: 450; font-size: var(--fs-sm); }
.bar-row .val { grid-area: val; color: var(--muted); font-size: .92rem; }
.track { grid-area: track; height: 10px; background: var(--line); border-radius: 99px; overflow: hidden; }
.track i { display: block; height: 100%; border-radius: 99px; background: var(--navy); }
.track i.hi { background: var(--accent); }
@media (min-width: 700px) {
  .bar-row { grid-template-columns: 220px 1fr 130px; grid-template-areas: "label track val"; align-items: center; gap: 16px; }
  .bar-row .val { text-align: right; }
}
.note { margin: 18px 0 0; color: var(--muted); font-size: var(--fs-sm); }

/* Features */
.features { display: grid; gap: 14px; }
.features li { display: flex; gap: 14px; padding: 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; }
.ico { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 10px; background: #e9eeff; color: var(--link); }
.ico svg { width: 22px; height: 22px; }
.features h3 { margin-bottom: 2px; }
.features p { margin: 0; color: var(--muted); font-size: .95rem; }
@media (min-width: 760px) { .features { grid-template-columns: 1fr 1fr; } }

/* Tool Links */
.tool-links { display: grid; gap: 12px; }
.tool-links a { display: block; height: 100%; padding: 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; color: var(--ink); text-decoration: none; transition: border-color .15s, transform .15s; }
.tool-links a:hover { border-color: var(--navy); transform: translateY(-2px); }
.tool-links h3 { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 4px; }
.tool-links h3 svg { width: 18px; height: 18px; color: var(--link); flex: none; }
.tool-links p { margin: 0; color: var(--muted); font-size: .92rem; }
@media (min-width: 600px) { .tool-links { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .tool-links { grid-template-columns: repeat(4, 1fr); } }

/* FAQ */
.faq { max-width: 800px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 56px; padding: 12px 0; font-weight: 650; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; background: var(--surface); color: var(--ink); font-size: 1.2rem; line-height: 1; }
.section.alt .faq summary::after { background: var(--bg); }
.faq details[open] summary::after { content: "\2212"; background: var(--navy); color: #fff; }
.faq details p { margin: 0; padding: 0 0 18px; color: var(--muted); }

/* Extension CTA */
.cta { display: grid; gap: 18px; padding: clamp(22px, 4vw, 36px); background: var(--navy); color: var(--on-navy); border-radius: 18px; }
.cta h2 { margin-bottom: 4px; color: #fff; }
.cta p { margin: 0; color: var(--on-navy-muted); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
@media (min-width: 900px) { .cta { grid-template-columns: 1fr auto; align-items: center; } }
@media (max-width: 480px) { .cta-actions .btn { width: 100%; } }
.disclaimer { margin: 18px 0 0; color: var(--muted); font-size: var(--fs-sm); }

/* Back to Top */
.to-top {
  position: fixed; right: max(16px, env(safe-area-inset-right, 0px)); bottom: max(16px, env(safe-area-inset-bottom, 0px));
  z-index: 90; width: 44px; height: 44px; display: grid; place-items: center; border: 0; border-radius: 12px;
  background: var(--navy); color: #fff; box-shadow: 0 10px 24px -10px rgba(0, 0, 0, .6);
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .2s, transform .2s, visibility .2s;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top svg { width: 20px; height: 20px; }

/* ==========================================================================
   7. BLOG & INNER PAGES COMPATIBILITY
   ========================================================================== */
.page-hero {
  color: var(--on-navy);
  background: radial-gradient(600px 260px at 90% -20%, rgba(80, 110, 255, .25), rgba(80, 110, 255, 0) 70%), var(--navy);
  padding: clamp(24px, 4.5vw, 48px) 0 clamp(28px, 5vw, 52px);
}
.page-hero h1 { color: #fff; font-size: clamp(1.7rem, 1.2rem + 2.2vw, 2.6rem); margin-bottom: .3em; }
.page-hero .lead { max-width: 60ch; margin: 0; color: var(--on-navy-muted); }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px 8px; margin: 0 0 14px; font-size: var(--fs-sm); color: var(--on-navy-muted); list-style: none; padding: 0; }
.crumbs a { color: var(--on-navy-muted); text-decoration: none; }
.crumbs a:hover { color: #fff; text-decoration: underline; }
.crumbs li + li::before { content: "/"; margin-right: 8px; opacity: .6; }
.crumbs li { display: inline; }
.meta { margin: 12px 0 0; color: var(--on-navy-muted); font-size: var(--fs-sm); }

.content-grid { display: grid; gap: 28px; padding-block: clamp(28px, 5vw, 56px); }
.toc { padding: 16px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; font-size: .92rem; }
.toc h2 { margin: 0 0 8px; font-size: .95rem; letter-spacing: 0; }
.toc a { display: block; padding: 5px 0; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--link); }
@media (min-width: 960px) {
  .content-grid { grid-template-columns: 240px minmax(0, 1fr); gap: 48px; }
  .content-grid.article-grid { grid-template-columns: 1fr; max-width: 840px; margin-inline: auto; }
  .toc { position: sticky; top: calc(var(--header-h) + 20px); align-self: start; }
}
.article-grid { max-width: 840px; margin-inline: auto; padding-block: clamp(24px, 4vw, 48px); }
.prose { max-width: 100%; margin-inline: auto; font-size: 1.05rem; line-height: 1.78; color: #1e293b; }
.prose h1, .prose h2, .prose h3, .prose h4 { color: #0f172a; font-weight: 800; letter-spacing: -0.02em; }
.prose h2 { margin-top: 2em; margin-bottom: 0.6em; font-size: clamp(1.35rem, 1.15rem + .8vw, 1.75rem); border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; font-size: 1.2rem; color: #1e293b; }
.prose p, .prose li { color: #334155; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1.25em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin: 0.4em 0; }
.prose .callout { margin: 1.6em 0; padding: 16px 20px; background: #fffbeb; border-left: 4px solid var(--accent); border-radius: 10px; color: #78350f; font-size: 0.98rem; box-shadow: 0 1px 3px rgba(0,0,0,0.03); }
.prose .table-wrap { overflow-x: auto; margin: 1.6em 0; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.03); }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.94rem; text-align: left; }
.prose th, .prose td { padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { background: #f8fafc; color: #0f172a; font-weight: 750; font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.04em; }
.prose tr:last-child td { border-bottom: 0; }
.prose tr:hover td { background: #fcfdfe; }
.prose strong { color: #0f172a; font-weight: 700; }
.prose code { background: #f1f5f9; color: #0f172a; padding: 2px 6px; border-radius: 6px; font-size: 0.88em; border: 1px solid #e2e8f0; }

/* Contact form */
.form { display: grid; gap: 14px; max-width: 560px; }
.form label { display: grid; gap: 6px; font-weight: 600; font-size: .92rem; }
.form input, .form textarea { width: 100%; padding: 12px 14px; font: inherit; font-size: 16px; color: var(--ink); background: #fff; border: 1.5px solid var(--line); border-radius: 10px; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--link); box-shadow: 0 0 0 4px #e9eeff; }
.form textarea { min-height: 140px; resize: vertical; }

/* Blog grid & cards */
.blog-grid, .posts { display: grid; gap: 20px; }
.blog-card, .post {
  display: flex; flex-direction: column; padding: 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 14px;
  color: var(--ink); text-decoration: none; transition: border-color .15s, transform .15s;
}
.blog-card:hover, .post:hover { border-color: var(--navy); transform: translateY(-2px); color: var(--ink); }
.blog-card-thumb { width: 100%; height: 190px; border-radius: 10px; overflow: hidden; margin-bottom: 14px; background: var(--surface); }
.blog-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.blog-tag, .blog-card-tag, .post small { display: inline-block; padding: 2px 8px; border-radius: 999px; background: var(--surface); color: var(--navy); font-size: .75rem; font-weight: 700; margin-bottom: 8px; align-self: flex-start; }
.blog-card h2, .blog-card-title, .blog-card h3, .post h3 { margin-bottom: 6px; font-size: 1.15rem; color: var(--ink); line-height: 1.35; font-weight: 750; }
.blog-card h2 a, .blog-card-title a { color: var(--ink); text-decoration: none; }
.blog-card h2 a:hover, .blog-card-title a:hover { color: var(--link); }
.blog-card p, .blog-card-desc, .post p { margin: 0; color: var(--muted); font-size: .95rem; flex: 1; }
.blog-card-footer { display: flex; justify-content: space-between; align-items: center; font-size: .85rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 12px; margin-top: 14px; }
.blog-card-btn { color: var(--link); font-weight: 700; text-decoration: none; font-size: .88rem; display: inline-flex; align-items: center; gap: 4px; }
.blog-card-btn:hover { text-decoration: underline; }
.blog-hero { text-align: center; padding: 40px 16px 20px; }
.blog-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 14px; border-radius: 999px; background: rgba(255, 176, 32, .15); color: #8a5a00; font-weight: 700; font-size: .85rem; margin-bottom: 12px; }
.native-ad-wrapper { margin: 24px auto; text-align: center; }
.native-ad-label { display: block; font-size: .75rem; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .05em; }
.card-box, .article-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; margin-top: 24px; }
@media (min-width: 680px) { .blog-grid, .posts { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .blog-grid, .posts { grid-template-columns: repeat(3, 1fr); } }

/* Article Layout */
.article-container { max-width: 860px; margin: 0 auto; }
.article-title { font-size: var(--fs-h1); line-height: 1.2; margin-bottom: 12px; }
.article-meta { display: flex; gap: 16px; color: var(--muted); font-size: .9rem; margin-bottom: 24px; }
.article-hero-media { border-radius: var(--radius-lg); overflow: hidden; margin: 24px 0; border: 1px solid var(--line); }
.article-hero-media img { width: 100%; height: auto; display: block; }
.article-content { font-size: 1.05rem; line-height: 1.8; color: #2d3748; }
.article-content h2 { margin-top: 36px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.article-content h3 { margin-top: 28px; }
.code-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; font-family: monospace; font-size: .9rem; overflow-x: auto; color: var(--navy); }
.author-bio-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  margin-top: 48px;
  display: flex;
  gap: 20px;
  align-items: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}
.author-bio-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid #2563eb;
  flex: none;
  background: var(--navy);
}
.author-bio-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Bulk downloader */
.batch-input-box textarea { width: 100%; min-height: 140px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); font-family: monospace; font-size: .95rem; background: var(--surface); color: var(--ink); }
.batch-input-box textarea:focus { outline: none; background: #fff; border-color: var(--navy); }
.batch-results-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.btn-batch-download { background: var(--accent); color: var(--on-accent); border: none; padding: 10px 22px; border-radius: 10px; font-weight: 700; font-size: .88rem; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.btn-batch-download:hover { background: var(--accent-dark); }
.batch-grid { display: flex; flex-direction: column; gap: 10px; }
.batch-video-card { display: flex; align-items: center; gap: 14px; padding: 10px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.batch-card-thumb { width: 70px; height: 42px; border-radius: 6px; overflow: hidden; background: #000; flex: none; }
.batch-card-thumb img { width: 100%; height: 100%; object-fit: cover; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; right: 20px; z-index: 2000;
  background: var(--navy); color: #fff; padding: 12px 20px; border-radius: var(--radius);
  box-shadow: 0 10px 25px rgba(0, 0, 0, .4); font-weight: 600; font-size: .9rem;
  opacity: 0; transform: translateY(12px); transition: opacity .2s, transform .2s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Cookie Consent Banner */
.cookie-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 1000;
  background: var(--navy-2); color: var(--on-navy); border-top: 2px solid var(--accent);
  padding: 14px 0; box-shadow: 0 -4px 20px rgba(0, 0, 0, .25);
  display: none; font-size: .88rem;
}
.cookie-banner.is-visible { display: block; }
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.cookie-inner p { margin: 0; color: var(--on-navy-muted); flex: 1 1 280px; line-height: 1.5; }
.cookie-inner a { color: var(--accent); text-decoration: underline; }
.cookie-actions { display: flex; gap: 10px; flex: none; }

/* ==========================================================================
   8. FOOTER
   ========================================================================== */
.site-footer { background: var(--navy); color: var(--on-navy-muted); border-top: 3px solid var(--accent); font-size: .94rem; }
.footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 30px 24px; padding-block: clamp(34px, 5vw, 56px); }
.footer-brand { grid-column: 1 / -1; }
.footer-brand .brand { margin-bottom: 12px; }
.footer-brand p { max-width: 42ch; margin: 0 0 14px; }
.status { display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border: 1px solid var(--navy-line); border-radius: 999px; font-size: var(--fs-sm); color: var(--on-navy); }
.status i { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 3px rgba(52, 211, 153, .22); }
.footer-col h4 { margin: 0 0 10px; color: #fff; font-size: .95rem; letter-spacing: 0; }
.footer-col a { display: inline-block; padding: 5px 0; color: var(--on-navy-muted); text-decoration: none; }
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { border-top: 1px solid var(--navy-line); }
.footer-bottom .wrap { display: grid; gap: 6px; padding-block: 18px; font-size: var(--fs-sm); }
.footer-bottom p { margin: 0; }
.footer-bottom a { color: var(--on-navy); }
@media (max-width: 380px) { .footer-main { grid-template-columns: 1fr; } }
@media (min-width: 900px) {
  .footer-main { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px 28px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom .wrap { grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
  .footer-bottom .legal { text-align: right; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }
@media print { .site-header, .site-footer, .ad-slot, .cta { display: none !important; } }


/* Google Play Store Coming Soon Badge Button */
.btn-google-play {
  display: inline-flex;
  align-items: center;
  background: #0f172a;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  padding: 8px 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
}
.btn-google-play:hover {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
}
.btn-play-text {
  display: flex;
  flex-direction: column;
  text-align: left;
  line-height: 1.15;
  margin-right: 10px;
}
.btn-play-text small {
  font-size: 9px;
  letter-spacing: 0.8px;
  color: #94a3b8;
  font-weight: 600;
  text-transform: uppercase;
}
.btn-play-text strong {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}
.badge-play-soon {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: #0b0f19;
  font-size: 10px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
}


/* FAQ Accordion Component */
.faq-group { margin-bottom: 28px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  margin-bottom: 12px;
  padding: 16px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item:hover {
  border-color: var(--navy-line, #3b82f6);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}
.faq-item summary {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text, #0f172a);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent, #f59e0b);
  font-weight: bold;
  line-height: 1;
}
.faq-item[open] summary::after {
  content: "−";
}
.faq-item p {
  margin: 10px 0 0;
  color: var(--muted, #475569);
  line-height: 1.65;
}