/* ==========================================================================
   My Threads Downloader — visual system
   Ink + deep teal + amber. Bricolage Grotesque (UI) / Source Serif 4 (prose).
   ========================================================================== */

:root {
  color-scheme: light dark;

  --ink: #0b1416;
  --ink-soft: #17262a;
  --body: #24353a;
  --muted: #5d7176;
  --paper: #edf0ec;
  --paper-2: #e3e8e2;
  --card: #ffffff;
  --line: #d3dbd4;
  --line-soft: #e4e9e3;
  --teal: #0f3d3e;
  --teal-bright: #1a6b66;
  --amber: #f5a524;
  --amber-deep: #b46f05;
  --danger: #a3202f;

  --sans: "Bricolage Grotesque", ui-sans-serif, system-ui, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --col: 40rem;
  --wide: 72rem;
  --r: 14px;
  --r-sm: 9px;
  --shadow: 0 1px 2px rgba(11, 20, 22, .05), 0 12px 30px -18px rgba(11, 20, 22, .35);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2f6f2;
    --ink-soft: #dbe5e0;
    --body: #c4d2cf;
    --muted: #8ba09e;
    --paper: #0a1113;
    --paper-2: #0e181a;
    --card: #121e20;
    --line: #24353a;
    --line-soft: #1b2b2e;
    --teal: #7fd8c4;
    --teal-bright: #7fd8c4;
    --amber: #f5a524;
    --amber-deep: #f5a524;
    --danger: #ff8b8b;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 14px 34px -20px rgba(0, 0, 0, .8);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Soft light behind the top of the page */
body::before {
  content: "";
  position: fixed;
  inset: -30vh 0 auto 0;
  height: 60vh;
  background:
    radial-gradient(60% 70% at 22% 40%, rgba(26, 107, 102, .16), transparent 70%),
    radial-gradient(45% 60% at 82% 20%, rgba(245, 165, 36, .14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.site-header, main, .site-footer { position: relative; z-index: 1; }

a { color: var(--teal-bright); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: var(--card);
  color: var(--ink);
  font-family: var(--sans);
  padding: .55rem .9rem;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow);
}

.wrap {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
}

/* ---------------------------------------------------------------- header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -.02em;
  color: var(--ink);
  text-decoration: none;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 8px;
  background: var(--teal);
  color: #fff;
  font-size: .95rem;
  line-height: 1;
  flex: none;
}
@media (prefers-color-scheme: dark) {
  .logo-mark { background: var(--teal); color: #071211; }
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .35rem;
  font-family: var(--sans);
  font-size: .8rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding: .3rem .55rem;
  border-radius: 999px;
  white-space: nowrap;
}
nav a:hover { color: var(--ink); background: var(--paper-2); }
nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--paper-2);
  font-weight: 600;
}

/* ------------------------------------------------------------------ hero */

.hero { padding: 3rem 0 .5rem; }
.hero .wrap { width: min(100% - 2.5rem, var(--col)); }

h1, h2, h3, h4 {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -.025em;
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.1rem);
  margin: 0 0 1.4rem;
}

h2 {
  font-size: clamp(1.4rem, 1.2rem + .8vw, 1.75rem);
  margin: 0 0 .9rem;
}

h3 {
  font-size: 1.12rem;
  margin: 2rem 0 .5rem;
  letter-spacing: -.015em;
}

h4 {
  font-size: 1.02rem;
  margin: 0 0 .35rem;
  letter-spacing: -.015em;
}

p { margin: 0 0 1rem; }

.intro { margin-top: 1.6rem; }
.intro > p:first-child {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------ tool */

.tool {
  position: relative;
  max-width: 100%;
  background: linear-gradient(168deg, #12232a 0%, #0b1416 65%);
  color: #e8f1ee;
  border-radius: var(--r);
  padding: 1.4rem 1.3rem 1.25rem;
  margin: 0 0 1.5rem;
  font-family: var(--sans);
  box-shadow: 0 24px 60px -34px rgba(11, 20, 22, .9), 0 1px 0 rgba(255, 255, 255, .06) inset;
  overflow: hidden;
}

/* thin amber seam along the top, like a scrub bar */
.tool::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber) 0 38%, var(--teal-bright) 38% 62%, rgba(255, 255, 255, .12) 62%);
}

.tool-guide-lead {
  margin: 0 0 .55rem;
  font-size: .95rem;
  font-weight: 650;
  color: #e8f1ee;
  line-height: 1.35;
}
.how-toggle {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin: 0 0 .85rem;
  padding: .42rem .8rem;
  background: rgba(255, 255, 255, .08);
  color: #e8f1ee;
  font-size: .8rem;
  font-weight: 650;
  box-shadow: 0 0 0 1px #2c4147 inset;
}
.how-toggle:hover { background: rgba(255, 255, 255, .14); filter: none; }
.how-toggle[aria-expanded="true"] {
  background: rgba(245, 165, 36, .16);
  box-shadow: 0 0 0 1px rgba(245, 165, 36, .45) inset;
  color: #f5d9a0;
}
.how-panel { margin: 0 0 1.05rem; }
.how-layout {
  display: flex;
  gap: 1.15rem;
  align-items: center;
}
.how-phone {
  position: relative;
  flex: none;
  width: 16rem;
  max-height: 28.5rem;
  aspect-ratio: 9 / 16;
  border-radius: 18px;
  overflow: hidden;
  background: #081012;
  box-shadow: 0 12px 28px -16px #000, 0 0 0 1px #24353a;
}
.how-phone iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  pointer-events: none;
  transform: scale(1.32);
  transform-origin: center center;
}
.how-phone-mask {
  position: absolute;
  inset: 0;
  z-index: 2;
}
.how-steps {
  margin: 0;
  padding-left: 1.2rem;
  color: #c9dad6;
  font-size: 1.05rem;
  line-height: 1.58;
}
.how-steps li { margin: 0 0 .7rem; }
.how-steps li:last-child { margin-bottom: 0; }
.how-steps li::marker { color: var(--amber); font-family: var(--sans); font-weight: 700; }
.tool[data-how-open] .tool-guide { display: none; }
.tool-guide {
  margin: 0 0 1.15rem;
  padding: .1rem 0 .15rem 1.35rem;
  border-left: 3px solid var(--amber);
  color: #9fb6b2;
  font-size: .82rem;
  line-height: 1.5;
}
.tool-guide li { margin: 0 0 .45rem; }
.tool-guide li:last-child { margin-bottom: 0; }
.tool-guide li::marker { color: var(--amber); font-family: var(--sans); font-weight: 700; }
.tool-guide strong { color: #d7e5e1; font-weight: 650; }
.tool-guide code,
.tool-help code,
.how-steps code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .86em;
  color: #e8f1ee;
  background: rgba(255, 255, 255, .06);
  padding: .05rem .28rem;
  border-radius: 4px;
}

.tool label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: #9fb6b2;
  margin-bottom: .5rem;
}

.tool-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.tool input[type="url"] {
  flex: 1 1 17rem;
  min-width: 0;
  padding: .8rem .85rem;
  border: 1px solid #2c4147;
  border-radius: var(--r-sm);
  background: #081012;
  color: #eef5f2;
  font: inherit;
  font-size: .95rem;
}
.tool input[type="url"]::placeholder { color: #5f7a7c; }
.tool input[type="url"]:focus {
  border-color: var(--amber);
  outline: none;
  box-shadow: 0 0 0 3px rgba(245, 165, 36, .25);
}

button {
  font: inherit;
  font-family: var(--sans);
  font-weight: 650;
  font-size: .95rem;
  border: 0;
  cursor: pointer;
  padding: .8rem 1.15rem;
  border-radius: var(--r-sm);
  background: var(--amber);
  color: #1e1402;
  transition: transform .08s ease, filter .15s ease;
  white-space: nowrap;
}
button:hover { filter: brightness(1.06); }
button:active { transform: translateY(1px); }
button[disabled] { opacity: .55; cursor: progress; }

button.secondary {
  background: rgba(255, 255, 255, .09);
  color: #dbe8e5;
  box-shadow: 0 0 0 1px #2c4147 inset;
}
button.secondary:hover { background: rgba(255, 255, 255, .15); }

.tool-help, .tool-status {
  font-size: .82rem;
  color: #8ea6a3;
  margin: .75rem 0 0;
}
.tool-status { color: #d7e5e1; }
.tool-status[data-kind="error"] { color: #ffb1a8; }

.tool-results {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}
.tool-results li {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #23383d;
  padding: .9rem 0 .15rem;
  font-size: .92rem;
  color: #c9dad6;
}
.tool-thumb-wrap {
  position: relative;
  flex: none;
  width: 5.5rem;
  height: 7.35rem;
  border-radius: 10px;
  overflow: hidden;
  background: #081012;
  box-shadow: 0 10px 24px -16px #000;
}
.tool-thumb {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tool-thumb-wrap[data-kind="video"]::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: .42rem 0 .42rem .72rem;
  border-color: transparent transparent transparent #fff;
  transform: translate(-30%, -50%);
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, .55));
  pointer-events: none;
}
.tool-result-meta {
  flex: 1 1 8rem;
  min-width: 0;
}
.tool-results a {
  background: #e9f3f0;
  color: #0b1416;
  text-decoration: none;
  font-weight: 650;
  font-size: .85rem;
  padding: .5rem .85rem;
  border-radius: var(--r-sm);
}
.tool-results a:hover { background: #fff; }

/* --------------------------------------------------------------- content */

.prose { padding: 2.9rem 0 0; }
.prose .wrap, .faq .wrap, .legal .wrap {
  width: min(100% - 2.5rem, var(--col));
}

/* the direct answer under each H2 */
.extractive {
  margin: 0 0 1.4rem;
  padding: .1rem 0 .1rem 1.1rem;
  border-left: 3px solid var(--teal-bright);
  color: var(--ink-soft);
  font-size: 1.04rem;
  line-height: 1.6;
}

ul, ol { margin: 0 0 1.2rem; padding-left: 1.35rem; }
li { margin-bottom: .45rem; }
li::marker { color: var(--teal-bright); }
ol li::marker { font-family: var(--sans); font-weight: 700; font-size: .9em; }

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  -webkit-overflow-scrolling: touch;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: .86rem;
  line-height: 1.45;
}
th, td {
  padding: .65rem .8rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}
th {
  background: var(--paper-2);
  color: var(--ink);
  font-weight: 650;
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }

.tip {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--amber);
  border-radius: var(--r-sm);
  padding: .95rem 1.1rem;
  margin: 1.2rem 0;
  font-family: var(--sans);
  font-size: .92rem;
  line-height: 1.55;
  color: var(--ink-soft);
  box-shadow: var(--shadow);
}
.tip strong { color: var(--ink); }

/* ------------------------------------------------------------------- faq */

.faq { padding: 3rem 0 0; }
.faq .faq-kicker {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0;
  margin: -.4rem 0 1.4rem;
}
.faq h4 {
  padding-top: 1.5rem;
  margin-bottom: .5rem;
  border-top: 1px solid var(--line-soft);
}
.faq h4:first-of-type { border-top: 0; padding-top: 0; }
.faq p { margin-bottom: 1.1rem; }

/* ---------------------------------------------------------------- footer */

.site-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--line-soft);
  background: var(--paper-2);
  padding: 2rem 0 2.6rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: .82rem;
  line-height: 1.6;
}
.site-footer .wrap { width: min(100% - 2.5rem, var(--col)); }
.site-footer p { margin: 0 0 .7rem; }
.site-footer a { color: var(--ink); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-links { display: flex; flex-wrap: wrap; gap: .4rem .9rem; }
.footer-fine { margin-top: 1.2rem; color: var(--muted); }

/* ----------------------------------------------------------------- legal */

.legal { padding: 3rem 0 0; }
.legal h1 { font-size: clamp(1.9rem, 1.5rem + 1.8vw, 2.4rem); }

/* ----------------------------------------------------------- responsive */

@media (max-width: 760px) {
  html { font-size: 17px; }
  .wrap { width: min(100% - 2rem, var(--wide)); }
  .hero .wrap, .prose .wrap, .faq .wrap, .legal .wrap, .site-footer .wrap {
    width: min(100% - 2rem, var(--col));
  }
  .hero { padding-top: 2.2rem; }
  .site-header .wrap { max-width: 100%; }
  nav {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    margin-inline: -.55rem;
    padding-inline: .55rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  nav::-webkit-scrollbar { display: none; }
  .tool input[type="url"] { flex: 1 1 100%; }
  .tool-row #go-btn { flex: 1 1 auto; }
  .tool-row .secondary { flex: 0 0 auto; }
  .tool-help { overflow-wrap: anywhere; }
  .tool-results li { justify-content: space-between; }
  .how-layout { flex-direction: column; align-items: stretch; gap: .85rem; }
  .how-phone {
    width: min(12.4rem, 62vw);
    max-height: 22.5rem;
    margin-inline: auto;
  }
  .how-steps {
    font-size: .82rem;
    line-height: 1.5;
    color: #9fb6b2;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

@media print {
  .site-header, .tool, .site-footer { display: none; }
  body { background: #fff; }
}