/* ============================================================
   Mashi Translate — production styles
   Visual source of truth: the Claude Design "Style Spec" frame.
   Mobile-first; the desktop layout kicks in at >=768px.
   ============================================================ */

:root {
  /* --- Colour tokens (from Style Spec frame) --- */
  --green:        #1E4A38; /* primary · CTA · text */
  --green-deep:   #15392B; /* headings · bands */
  --lake:         #1C5A72; /* links · secondary */
  --ochre:        #C0722E; /* accent · warnings */
  --offwhite:     #F4EFE3; /* page background */
  --ink:          #1C2620; /* body text */
  --muted:        #5B655D; /* muted body */

  /* surfaces & lines */
  --surface:      #FBF8F1; /* raised panels / sections */
  --hairline:     #E5DDCB; /* section dividers */
  --input-border: #DDD3BD; /* source input border */
  --target-bg:    #F1F4F1; /* target pane background */
  --target-border:#D7E0D6; /* target pane border */

  /* warning chip */
  --warn-bg:      #FBEFDF;
  --warn-border:  #ECCFA6;
  --warn-text:    #8A521F;

  /* incidental greys used across the mockups */
  --nav-text:     #42493F;
  --label:        #6B7269;
  --faint:        #9AA096;
  --prose:        #3A4139;
  --note:         #8A9088;
  --chip-border:  #C9BFA6;
  --badge-bg:     #F6E7D3;
  --badge-border: #E0B98E;

  /* on-dark text tints */
  --on-dark:      #F8F5EC;
  --on-dark-soft: #A9BBA8;
  --on-dark-warm: #E4DAC4;

  /* radii (px) */
  --r-btn: 11px;
  --r-pane: 14px;
  --r-proverb: 18px;
  --r-modal: 20px;

  /* fonts */
  --serif: 'Spectral', Georgia, 'Times New Roman', serif;
  --sans:  'IBM Plex Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  --shell-max: 1180px;
}

/* --- reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--offwhite);
  color: var(--ink);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, p { margin: 0; }
img, svg { display: block; }
a { color: var(--lake); }
button { font-family: inherit; }

/* shared layout shell */
.shell { width: 100%; max-width: var(--shell-max); margin: 0 auto; padding: 0 22px; }

.view[hidden] { display: none; }

/* accessibility helpers */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--green); color: var(--on-dark);
  padding: 10px 16px; border-radius: 0 0 var(--r-btn) 0;
  font: 600 14px/1 var(--sans); text-decoration: none;
}
.skip-link:focus { left: 0; }

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

/* ===========================================================
   Shared atoms
   =========================================================== */
.eyebrow {
  font: 600 11px/1 var(--sans);
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--ochre); margin-bottom: 16px;
}
.section-title {
  font: 600 clamp(26px, 6vw, 36px)/1.18 var(--serif);
  color: var(--green-deep); letter-spacing: -.005em;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: 600 16px/1 var(--sans);
  padding: 16px 26px; border-radius: var(--r-btn);
  border: 1.5px solid transparent; cursor: pointer; text-decoration: none;
  transition: filter .15s, background .15s, color .15s;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { filter: brightness(.95); }
.btn--primary  { background: var(--green); color: var(--on-dark); }
.btn--secondary{ background: transparent; color: var(--green); border-color: var(--green); }
.btn--accent   { background: var(--ochre); color: #FBF6EC; }
.btn--block    { width: 100%; }
.btn__sep  { opacity: .55; }
.btn__arrow{ font-size: 18px; }

.badge {
  display: inline-block;
  font: 500 11px/1 var(--sans);
  color: var(--ochre); background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  padding: 4px 9px; border-radius: 20px;
}

/* brand mark — Engombe badge SVG */
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand__mark { width: 30px; height: 30px; flex-shrink: 0; display: block; }
.brand__name { font: 600 17px/1 var(--serif); color: var(--ink); }
.brand__name--sm { font-size: 15px; }

/* ===========================================================
   Landing — nav
   =========================================================== */
.nav { background: var(--offwhite); border-bottom: 1px solid var(--hairline); }
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 18px; padding-bottom: 18px;
}
.nav .brand__mark { width: 34px; height: 34px; }
.nav .brand__name { font-size: 19px; }
.nav__links { display: none; align-items: center; gap: 34px; }
.nav__link {
  font: 500 14.5px/1 var(--sans); color: var(--nav-text); text-decoration: none;
}
.nav__link:hover { color: var(--green); }
.nav__lang {
  font: 500 13.5px/1 var(--sans); color: var(--green);
  border: 1px solid var(--chip-border); padding: 8px 13px; border-radius: 7px;
}
.nav__toggle {
  display: inline-flex; flex-direction: column; gap: 4px;
  background: none; border: 0; padding: 6px; cursor: pointer;
}
.nav__toggle span { width: 19px; height: 2px; background: var(--nav-text); border-radius: 2px; }
.nav__mobile {
  display: flex; flex-direction: column; gap: 4px;
  padding: 8px 22px 18px; border-bottom: 1px solid var(--hairline);
}
.nav__mobile .nav__link { padding: 12px 0; }
.nav__mobile[hidden] { display: none; }

/* ===========================================================
   Landing — hero
   =========================================================== */
.hero { padding: 44px 22px 48px; display: grid; gap: 34px; }
.hero__title {
  font: 600 clamp(42px, 11vw, 62px)/1.04 var(--serif);
  color: var(--green-deep); letter-spacing: -.01em; margin-bottom: 18px;
}
.hero__lead { font: 500 clamp(19px, 5vw, 23px)/1.4 var(--serif); color: var(--ink); margin-bottom: 5px; }
.hero__lead-en { font: 400 15px/1.45 var(--sans); color: var(--muted); font-style: italic; margin-bottom: 26px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero__actions .btn { flex: 1 1 auto; }
.hero__stats {
  display: flex; align-items: center; flex-wrap: wrap; gap: 14px;
  font: 500 14px/1.4 var(--sans); color: var(--label);
}
.hero__stats .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--ochre); }

/* proverb card */
.proverb {
  position: relative; overflow: hidden;
  background: var(--green); border-radius: var(--r-proverb);
  padding: 28px 26px;
  box-shadow: 0 18px 40px -22px rgba(21,57,43,.7);
}
.proverb__halo {
  position: absolute; top: -34px; right: -34px; width: 130px; height: 130px;
  border-radius: 50%; background: rgba(192,114,46,.16);
}
.proverb__eyebrow {
  display: flex; align-items: center; gap: 8px; margin-bottom: 20px;
  font: 600 10.5px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase;
  color: #D9A86F;
}
.proverb__dot { width: 6px; height: 6px; border-radius: 50%; background: #D98B45; }
.proverb__mashi {
  font: 500 clamp(22px, 6vw, 27px)/1.36 var(--serif);
  color: var(--offwhite); font-style: italic; margin-bottom: 18px;
}
.proverb__rule { height: 1px; border: 0; background: rgba(244,239,227,.16); margin: 0 0 18px; }
.proverb__fr { font: 400 16px/1.5 var(--sans); color: var(--on-dark-warm); margin-bottom: 5px; }
.proverb__en { font: 400 14px/1.5 var(--sans); color: var(--on-dark-soft); font-style: italic; }

/* ===========================================================
   Landing — about / cta / footer
   =========================================================== */
.about { background: var(--surface); border-top: 1px solid var(--hairline); padding: 48px 0; }
.about__inner { max-width: 820px; }
.about .section-title { margin-bottom: 22px; }
.prose { font: 400 clamp(15.5px, 4vw, 18px)/1.7 var(--sans); color: var(--prose); margin-bottom: 18px; }
.prose:last-child { margin-bottom: 0; }
.prose__note { color: var(--note); }

.cta-band { background: var(--green-deep); padding: 40px 0; }
.cta-band__inner {
  display: flex; flex-direction: column; align-items: flex-start; gap: 20px;
}
.cta-band__title { font: 600 clamp(22px, 5vw, 27px)/1.25 var(--serif); color: var(--offwhite); margin-bottom: 6px; }
.cta-band__sub { font: 400 15px/1.4 var(--sans); color: var(--on-dark-soft); }

.footer { background: var(--offwhite); border-top: 1px solid var(--hairline); padding: 36px 0; }
.footer__inner { display: flex; flex-direction: column; gap: 22px; }
.footer__brand .brand { margin-bottom: 12px; }
.footer .brand__mark { width: 26px; height: 26px; }
.footer__about { font: 400 13.5px/1.6 var(--sans); color: var(--label); max-width: 420px; }
.footer__label { font: 500 13.5px/1.6 var(--sans); color: var(--nav-text); margin-bottom: 4px; }
.footer__mail { font: 400 13.5px/1.6 var(--sans); color: var(--green); text-decoration: none; }
.footer__mail:hover { text-decoration: underline; }
.footer__copy { font: 400 12.5px/1.6 var(--sans); color: var(--faint); margin-top: 14px; }

/* ===========================================================
   Translator
   =========================================================== */
.t-header { background: var(--surface); border-bottom: 1px solid var(--hairline); }
.t-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.t-header__back { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; }
.t-header .brand__mark { width: 30px; height: 30px; }

.translator { padding: 22px 22px 40px; }

/* language bar */
.langbar { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.langbar__group { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; }
.langbar__role { display: none; font: 400 13.5px/1 var(--sans); color: var(--faint); }
.langbar__swap { flex-shrink: 0; }

.lang-select {
  flex: 1; min-width: 0;
  appearance: none; -webkit-appearance: none;
  font: 600 14px/1 var(--sans); color: var(--ink);
  background-color: var(--surface);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' fill='none' stroke='%231C2620' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat; background-position: right 14px center;
  border: 1.5px solid var(--chip-border); border-radius: 9px;
  padding: 12px 34px 12px 15px; cursor: pointer;
}
/* the source select is shown filled green in the mockup */
.lang-select--source {
  background-color: var(--green); color: var(--offwhite); border-color: var(--green);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' fill='none' stroke='%23F4EFE3' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>");
}

.swap {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--surface); border: 1.5px solid var(--chip-border);
  color: var(--green); font-size: 17px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: transform .2s, background .15s;
}
.swap:hover { background: #fff; }
.swap:active { transform: rotate(180deg); }

/* panes container */
.panes { display: flex; flex-direction: column; gap: 12px; }

.pane {
  border-radius: var(--r-pane);
  padding: 16px;
  display: flex; flex-direction: column;
}
.pane--source { background: #fff; border: 1.5px solid var(--input-border); }
.pane--target {
  background: var(--target-bg); border: 1.5px solid var(--target-border);
  min-height: 150px; position: relative;
}

.pane__input {
  flex: 1; width: 100%; min-height: 120px; resize: vertical;
  border: 0; outline: none; background: transparent;
  font: 400 17px/1.55 var(--sans); color: var(--ink);
}
.pane__input::placeholder { color: var(--faint); }

.warning {
  display: flex; align-items: flex-start; gap: 8px;
  background: var(--warn-bg); border: 1px solid var(--warn-border);
  border-radius: 8px; padding: 10px 11px; margin: 10px 0;
}
.warning[hidden] { display: none; }
.warning__icon {
  flex-shrink: 0; width: 16px; height: 16px; border-radius: 50%;
  background: var(--ochre); color: #fff; margin-top: 1px;
  display: flex; align-items: center; justify-content: center;
  font: 700 11px/1 var(--sans);
}
.warning__text { font: 400 12.5px/1.5 var(--sans); color: var(--warn-text); }
.warning__text em { color: #B0824A; }

.pane__foot {
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid #EFE7D4; padding-top: 12px; margin-top: 10px;
}
.linkbtn {
  background: none; border: 0; padding: 0; cursor: pointer;
  font: 400 13px/1 var(--sans); color: var(--faint);
}
.linkbtn:hover { color: var(--green); }
.counter { font: 500 12px/1 var(--sans); color: #8A9389; letter-spacing: .01em; }
.counter.is-long { color: #A8511F; font-weight: 600; }

/* translate button */
.translate-action { display: flex; justify-content: center; }
.btn--translate { width: 100%; }
.btn[disabled] { opacity: .6; cursor: default; filter: none; }

/* target-pane states */
.state[hidden] { display: none; }
.state--idle {
  flex: 1; display: flex; align-items: center; justify-content: center;
  text-align: center; min-height: 118px;
}
.target-placeholder { font: 400 18px/1.5 var(--sans); color: #9FB09E; max-width: 260px; }
.target-placeholder em { font-size: 15px; }

.loading__head { display: flex; align-items: center; gap: 11px; margin-bottom: 20px; }
.loading__label { font: 500 15px/1 var(--sans); color: #5B7A66; }
.spinner {
  width: 22px; height: 22px; flex-shrink: 0;
  border: 2.5px solid #C7D3C6; border-top-color: var(--green);
  border-radius: 50%; animation: mashi-spin .8s linear infinite;
}
.skeleton {
  height: 15px; border-radius: 6px; background: #DDE6DC; margin-bottom: 13px;
  animation: mashi-pulse 1.4s ease-in-out infinite;
}
.skeleton:last-child { margin-bottom: 0; }

.result { font: 400 clamp(17px, 4.5vw, 20px)/1.6 var(--sans); color: var(--green-deep); }
.result__foot {
  display: flex; align-items: center; justify-content: flex-end;
  border-top: 1px solid var(--target-border); padding-top: 12px; margin-top: 12px;
}
.linkbtn--copy { display: inline-flex; align-items: center; gap: 7px; font-weight: 500; font-size: 13.5px; color: var(--green); }
.linkbtn--copy:hover { color: var(--green-deep); }

.state--error {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; min-height: 118px;
}
.error__icon {
  width: 42px; height: 42px; border-radius: 50%; background: var(--badge-bg);
  display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px;
}
.error__title { font: 500 16.5px/1.45 var(--sans); color: var(--warn-text); margin-bottom: 6px; }
.error__sub { font: 400 14px/1.5 var(--sans); color: #A07A4C; max-width: 280px; margin-bottom: 16px; }
.btn--retry {
  background: transparent; color: #A8511F; border-color: var(--ochre);
  font-size: 14px; padding: 10px 18px; border-radius: 9px;
}

/* ===========================================================
   Beta modal
   =========================================================== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(21,40,32,.62);
  display: flex; align-items: center; justify-content: center;
  padding: 16px; overflow-y: auto;
}
.modal-overlay[hidden] { display: none; }
.modal {
  width: 100%; max-width: 600px;
  background: var(--surface); border-radius: var(--r-modal);
  box-shadow: 0 30px 70px -20px rgba(0,0,0,.5);
  padding: 28px 22px 24px;
}
.modal__head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.modal .brand__mark { width: 32px; height: 32px; }
.modal__title { font: 600 clamp(22px, 5vw, 28px)/1.25 var(--serif); color: var(--green-deep); margin-bottom: 16px; }
.modal__fr { font: 400 14px/1.62 var(--sans); color: var(--prose); margin-bottom: 14px; }
.modal__en { font: 400 12.5px/1.62 var(--sans); color: var(--label); font-style: italic; margin-bottom: 16px; }
.modal__mashi {
  font: 500 13.5px/1.6 var(--serif); color: var(--green);
  padding: 12px 15px; background: #EEF1EC;
  border-left: 3px solid var(--green); border-radius: 0 8px 8px 0;
  margin-bottom: 22px;
}
.modal__fine { font: 400 11.5px/1.5 var(--sans); color: var(--faint); text-align: center; margin-top: 12px; }

/* ===========================================================
   Animations
   =========================================================== */
@keyframes mashi-spin { to { transform: rotate(360deg); } }
@keyframes mashi-pulse { 0%,100% { opacity:.45; } 50% { opacity:.9; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition: none !important; }
}

/* ===========================================================
   Desktop layout  (>= 768px)
   =========================================================== */
@media (min-width: 768px) {
  .shell { padding: 0 56px; }

  /* nav */
  .nav__inner { padding-top: 22px; padding-bottom: 22px; }
  .nav__links { display: flex; }
  .nav__toggle, .nav__mobile { display: none; }

  /* hero two-column */
  .hero {
    grid-template-columns: 1.18fr 1fr; gap: 56px;
    padding: 74px 56px 64px; align-items: start;
  }
  .hero__lead-en { margin-bottom: 38px; }
  .hero__actions .btn { flex: 0 0 auto; }
  .proverb { padding: 38px 36px 34px; }
  .proverb__eyebrow { font-size: 11.5px; letter-spacing: .13em; margin-bottom: 26px; }
  .proverb__dot { width: 7px; height: 7px; }
  .proverb__mashi { margin-bottom: 22px; }
  .proverb__rule { margin-bottom: 20px; }
  .proverb__fr { font-size: 16.5px; margin-bottom: 6px; }
  .proverb__en { font-size: 14.5px; }

  /* about / cta / footer */
  .about { padding: 70px 0; }
  .cta-band { padding: 54px 0; }
  .cta-band__inner { flex-direction: row; align-items: center; justify-content: space-between; }
  .footer__inner { flex-direction: row; align-items: flex-start; justify-content: space-between; }
  .footer__contact { text-align: right; }

  /* translator */
  .translator { padding: 40px 56px 48px; }
  .langbar {
    display: grid; grid-template-columns: 1fr 64px 1fr; align-items: center; gap: 0;
    margin-bottom: 18px;
  }
  .langbar__group { gap: 8px; }
  .langbar__group:last-child { justify-self: stretch; }
  .langbar__role { display: inline; }
  .lang-select { flex: 0 0 auto; }
  .langbar__swap { display: flex; justify-content: center; }
  .swap { width: 46px; height: 46px; font-size: 20px; }

  /* panes: source | target on one row, button spanning below */
  .panes {
    display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
    grid-template-areas: "src tgt" "btn btn";
  }
  .pane--source { grid-area: src; }
  .pane--target { grid-area: tgt; }
  .translate-action { grid-area: btn; margin-top: 6px; }
  .pane { padding: 22px; min-height: 280px; }
  .pane__input { font-size: 20px; line-height: 1.6; min-height: 170px; }
  .btn--translate { width: auto; padding: 16px 40px; }
  .target-placeholder { font-size: 18px; }

  /* modal */
  .modal { padding: 44px 46px 38px; }
  .modal__fr { font-size: 15px; }
  .modal__en { font-size: 13.5px; }
  .modal__mashi { font-size: 14.5px; }
  .modal__fine { font-size: 12.5px; }
}