:root {
  --paper: #fbfbfd;
  --white: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #e4e4e9;
  --indigo: #3b3fe0;
  --indigo-deep: #2e32c4;
  --indigo-soft: #eeeffd;
  --teal: #0e9f9a;
  --amber: #d9822b;
  --rose: #d14f7a;
  --err: #c93030;
  --radius: 20px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Noto Sans Arabic", "Noto Sans", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 17px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--indigo); outline-offset: 3px; border-radius: 8px; }
.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }

/* ---- Header ---- */
.top { position: sticky; top: 0; z-index: 10; background: rgba(251, 251, 253, 0.82); backdrop-filter: saturate(180%) blur(18px); -webkit-backdrop-filter: saturate(180%) blur(18px); border-bottom: 1px solid rgba(0, 0, 0, 0.06); }
.top .wrap { display: flex; align-items: center; gap: 28px; height: 60px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 20px; letter-spacing: -0.02em; text-decoration: none; }
.logo svg { display: block; }
.nav { display: flex; gap: 26px; margin-inline-start: 12px; font-size: 14px; }
.nav a { color: var(--muted); text-decoration: none; transition: color 0.15s; }
.nav a:hover { color: var(--ink); }
.top-right { margin-inline-start: auto; display: flex; align-items: center; gap: 12px; }
.lang { appearance: none; -webkit-appearance: none; background: transparent; border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; font: inherit; font-size: 14px; color: var(--ink); cursor: pointer; }

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 999px; padding: 13px 26px; font: inherit; font-size: 17px; font-weight: 600; background: var(--indigo); color: #fff; text-decoration: none; cursor: pointer; transition: background 0.15s, transform 0.15s; }
.btn:hover { background: var(--indigo-deep); }
.btn:active { transform: scale(0.98); }
.btn.small { padding: 8px 18px; font-size: 14px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--indigo); padding-inline: 8px; }
.btn.ghost:hover { background: transparent; text-decoration: underline; }

/* ---- Hero ---- */
.hero { padding: 88px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(40px, 7.2vw, 76px); font-weight: 700; letter-spacing: -0.035em; line-height: 1.04; max-width: 14ch; margin-inline: auto; }
[dir="rtl"] .hero h1, [dir="rtl"] h2 { letter-spacing: 0; }
.hero p { font-size: clamp(18px, 2.2vw, 22px); color: var(--muted); max-width: 34em; margin: 24px auto 0; line-height: 1.45; }
.hero .cta { margin-top: 36px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---- Demo card (the memorable moment: two voices, one waveform) ---- */
.demo { width: min(760px, 100% - 40px); margin: 56px auto 0; background: var(--white); border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 30px 60px -30px rgba(40, 44, 120, 0.25); text-align: start; overflow: hidden; }
.demo-script { padding: 26px 30px 22px; display: grid; gap: 12px; }
.demo-cap { font-size: 13px; color: var(--muted); font-weight: 500; }
.turn { display: grid; grid-template-columns: 76px 1fr; gap: 12px; align-items: baseline; font-size: 17px; }
.who { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.who i { width: 9px; height: 9px; border-radius: 50%; background: var(--c); flex: none; }
.turn.a { --c: var(--indigo); }
.turn.b { --c: var(--teal); }
.demo-wave { border-top: 1px solid var(--line); padding: 22px 30px 26px; background: #fafafd; }
.wave { display: flex; align-items: center; gap: 3px; height: 68px; margin-top: 12px; }
.wave span { flex: none; width: 4px; border-radius: 3px; height: calc(var(--h) * 1%); background: var(--c); transform-origin: center; }
.wave span.gap { width: 14px; background: none; height: 0; }
.wave .a { --c: var(--indigo); }
.wave .b { --c: var(--teal); }
@keyframes grow { from { transform: scaleY(0.08); opacity: 0; } to { transform: scaleY(1); opacity: 1; } }
.wave span:not(.gap) { animation: grow 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) backwards; animation-delay: calc(var(--i) * 28ms + 300ms); }

/* ---- Sections ---- */
section { padding: 96px 0 0; }
h2 { font-size: clamp(30px, 4.6vw, 48px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; max-width: 18ch; }
.center { text-align: center; }
.center h2 { margin-inline: auto; }

.steps { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; }
.step { border-top: 2px solid var(--ink); padding-top: 18px; }
.step b { display: block; font-size: 15px; color: var(--indigo); font-weight: 600; margin-bottom: 8px; }
.step h3 { font-size: 22px; letter-spacing: -0.015em; line-height: 1.25; }
.step p { margin-top: 10px; color: var(--muted); font-size: 16px; }

.feats { margin-top: 48px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 56px; }
.feat { border-top: 1px solid var(--line); padding: 26px 0 34px; }
.feat h3 { font-size: 21px; letter-spacing: -0.015em; }
.feat p { margin-top: 8px; color: var(--muted); max-width: 30em; }

.langs { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 6px 34px; font-size: clamp(28px, 4.4vw, 52px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.25; }
.langs span:nth-child(3n+2) { color: var(--indigo); }
.langs span:nth-child(3n) { color: var(--teal); }
.langs .more { color: var(--muted); font-weight: 500; }

.faq { margin-top: 36px; max-width: 760px; }
details { border-top: 1px solid var(--line); padding: 20px 0; }
details:last-child { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-size: 19px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 26px; line-height: 1; color: var(--muted); transition: transform 0.2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin-top: 12px; color: var(--muted); max-width: 40em; }

.final { margin-top: 110px; background: var(--indigo-soft); border-radius: 32px; padding: 72px 24px; text-align: center; }
.final h2 { margin-inline: auto; }
.final .btn { margin-top: 30px; }

footer { margin-top: 90px; border-top: 1px solid var(--line); padding: 34px 0 44px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 30px; align-items: center; justify-content: space-between; }

/* ---- Tool page ---- */
.app { width: min(760px, 100% - 40px); margin: 0 auto; padding: 56px 0 90px; }
.app h1 { font-size: clamp(32px, 5vw, 46px); letter-spacing: -0.03em; line-height: 1.1; font-weight: 700; }
[dir="rtl"] .app h1 { letter-spacing: 0; }
.app .lead { color: var(--muted); margin-top: 12px; font-size: 18px; }
.panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-top: 26px; }
.panel h3 { font-size: 15px; font-weight: 600; margin-bottom: 10px; }
.panel h3 small { font-weight: 400; color: var(--muted); font-size: 14px; margin-inline-start: 6px; }
.field { width: 100%; border: 1px solid var(--line); border-radius: 12px; padding: 13px 14px; font: inherit; font-size: 17px; background: var(--paper); color: var(--ink); }
.field:focus { outline: 3px solid var(--indigo-soft); border-color: var(--indigo); }
textarea.field { min-height: 210px; resize: vertical; line-height: 1.55; }
.meta { color: var(--muted); font-size: 14px; margin-top: 8px; }
.meta.over { color: var(--err); }
.vrow { display: grid; grid-template-columns: minmax(90px, 140px) 1fr auto; gap: 10px; align-items: center; margin-top: 12px; }
.vrow .who { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: flex; }
.vrow .who i { background: var(--c); }
.pbtn { border: 1px solid var(--line); background: var(--white); border-radius: 999px; padding: 9px 16px; font: inherit; font-size: 14px; font-weight: 500; cursor: pointer; color: var(--ink); }
.pbtn:hover { border-color: var(--indigo); color: var(--indigo); }
#go { width: 100%; margin-top: 22px; }
#status { margin-top: 16px; min-height: 24px; color: var(--muted); font-size: 16px; }
#status.err { color: var(--err); }
#result { margin-top: 20px; }
#result audio { width: 100%; }
#dl { display: inline-block; margin-top: 14px; color: var(--indigo); font-weight: 600; }

/* ---- Phones ---- */
@media (max-width: 820px) {
  .nav { display: none; }
  .steps { grid-template-columns: 1fr; gap: 28px; }
  .feats { grid-template-columns: 1fr; }
  section { padding-top: 72px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .top .wrap { gap: 10px; }
  .btn.small { padding: 8px 14px; }
  .hero { padding-top: 56px; }
  .demo-script, .demo-wave { padding-inline: 20px; }
  .turn { grid-template-columns: 1fr; gap: 2px; }
  .wave { gap: 2px; }
  .wave span { width: 3px; }
  .wave span.gap { width: 9px; }
  .vrow { grid-template-columns: 1fr auto; }
  .vrow .who { grid-column: 1 / -1; }
  .final { border-radius: 24px; padding: 52px 20px; }
  .panel { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .wave span:not(.gap) { animation: none; }
}

/* ---- Sign-up / login ---- */
.auth { width: min(420px, 100% - 40px); margin: 0 auto; padding: 56px 0 90px; }
.auth h1 { font-size: clamp(30px, 5vw, 38px); letter-spacing: -0.03em; line-height: 1.12; font-weight: 700; }
[dir="rtl"] .auth h1 { letter-spacing: 0; }
.auth .lead { color: var(--muted); margin-top: 10px; font-size: 17px; }
.tabs { display: flex; background: #eceef3; border-radius: 999px; padding: 4px; margin-bottom: 30px; }
.tabs button { flex: 1; border: 0; background: transparent; border-radius: 999px; padding: 9px 12px; font: inherit; font-size: 15px; font-weight: 600; color: var(--muted); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--white); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12); }
.stack { display: grid; gap: 18px; margin-top: 26px; }
.stack label { display: grid; gap: 7px; font-size: 14px; font-weight: 600; }
.stack .meta { margin-top: 0; font-weight: 400; }
.linkbtn { border: 0; background: none; color: var(--indigo); font: inherit; font-size: 15px; font-weight: 500; cursor: pointer; padding: 4px 0; text-align: start; }
.linkbtn:hover { text-decoration: underline; }
.amsg { margin-top: 18px; min-height: 24px; font-size: 15px; color: var(--ink); }
.amsg.err { color: var(--err); }
[hidden] { display: none !important; }

/* ---- Account bar on the tool page ---- */
.who-mail { color: var(--muted); font-size: 14px; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pill { display: inline-block; background: var(--indigo-soft); color: var(--indigo-deep); padding: 7px 16px; border-radius: 999px; font-size: 14px; font-weight: 600; margin-top: 18px; }
.pill.out { background: #fdecec; color: var(--err); }
.top-right a.login { color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 500; }
@media (max-width: 560px) { .who-mail, .top-right a.login { display: none; } }