/* ═══════════════════════════════════════════════════════════════
   Lingua — styles.css
   Aesthetic: Luxury-minimal · warm ivory · deep ink · serif/mono
   ═══════════════════════════════════════════════════════════════ */

/* ── Tokens ───────────────────────────────────────────────────── */
:root {
  --bg:          #f5f2ec;
  --card:        #fdfcf9;
  --ink:         #1a1714;
  --ink-2:       #4a4540;
  --ink-3:       #8a8480;
  --accent:      #2d6a4f;       /* rich forest green */
  --accent-lt:   #e8f4ef;
  --accent-dk:   #1b4332;
  --pill-bg:     #f0ede6;
  --pill-hover:  #e5e0d5;
  --danger:      #c0392b;
  --border:      #e4e0d8;
  --shadow-sm:   0 2px 8px rgba(26,23,20,.06);
  --shadow-md:   0 8px 32px rgba(26,23,20,.10);
  --shadow-lg:   0 24px 64px rgba(26,23,20,.12);
  --radius-sm:   8px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'DM Sans', system-ui, sans-serif;
  --font-mono:   'DM Mono', 'Courier New', monospace;
  --transition:  0.2s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  min-height: 100dvh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-x: hidden;
}

/* ── Ambient orbs ─────────────────────────────────────────────── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}
.orb-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, #b7e4c7 0%, transparent 70%);
  top: -160px; left: -160px;
  animation: drift 18s ease-in-out infinite alternate;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #f6d860 0%, transparent 70%);
  bottom: -120px; right: -120px;
  animation: drift 22s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate(0, 0); }
  to   { transform: translate(40px, 30px); }
}

/* ── App shell ────────────────────────────────────────────────── */
.app-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1040px;
  padding: 48px 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Header ───────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  color: var(--accent);
  line-height: 1;
}
.logo-name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--ink);
}
.tagline {
  font-size: .8rem;
  color: var(--ink-3);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 300;
}

/* ── Card ─────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: card-in .5s cubic-bezier(.2,1,.3,1) both;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Language row ─────────────────────────────────────────────── */
.lang-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 28px 20px;
  flex-wrap: wrap;
}
.lang-group {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lang-label {
  font-size: .65rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-left: 2px;
}
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── Pill buttons ─────────────────────────────────────────────── */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--pill-bg);
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: .82rem;
  font-weight: 400;
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
  user-select: none;
}
.pill:hover:not(.active) {
  background: var(--pill-hover);
  border-color: #ccc9c0;
  transform: translateY(-1px);
}
.pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(45,106,79,.3);
  font-weight: 500;
}
.pill.active:hover {
  background: var(--accent-dk);
  border-color: var(--accent-dk);
}
/* Conflict highlight: same lang selected on both sides */
.pill.conflict {
  border-color: var(--danger);
  color: var(--danger);
}

/* ── Swap button ──────────────────────────────────────────────── */
.swap-btn {
  flex-shrink: 0;
  margin-top: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}
.swap-btn svg { width: 18px; height: 18px; }
.swap-btn:hover {
  background: var(--accent-lt);
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(180deg);
  box-shadow: 0 4px 12px rgba(45,106,79,.15);
}
.swap-btn:active { transform: rotate(180deg) scale(.92); }

/* ── Card divider ─────────────────────────────────────────────── */
.card-divider {
  height: 1px;
  background: var(--border);
  margin: 0 28px;
}

/* ── Panes ────────────────────────────────────────────────────── */
.panes {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  min-height: 320px;
}
.pane-sep {
  background: var(--border);
  margin: 24px 0;
}
.pane {
  display: flex;
  flex-direction: column;
  padding: 24px 28px;
}

/* ── Pane header ──────────────────────────────────────────────── */
.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.pane-badge {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--pill-bg);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}
.pane-actions {
  display: flex;
  gap: 6px;
}

/* ── Icon buttons ─────────────────────────────────────────────── */
.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition);
}
.icon-btn svg { width: 15px; height: 15px; }
.icon-btn:hover:not(:disabled) {
  background: var(--accent-lt);
  color: var(--accent);
  border-color: var(--accent);
  transform: scale(1.08);
}
.icon-btn:disabled { opacity: .35; cursor: default; }
/* Copy success flash */
.icon-btn.copied {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── Textarea ─────────────────────────────────────────────────── */
textarea {
  flex: 1;
  width: 100%;
  min-height: 160px;
  border: none;
  outline: none;
  background: transparent;
  resize: none;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
  caret-color: var(--accent);
}
textarea::placeholder { color: var(--ink-3); }
textarea:focus { /* no outline; card provides boundary */ }

/* ── Pane footer ──────────────────────────────────────────────── */
.pane-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.char-count {
  font-size: .78rem;
  color: var(--ink-3);
  font-family: var(--font-mono);
  transition: color var(--transition);
}
.char-count.near-limit { color: #d97706; }
.char-count.at-limit   { color: var(--danger); }

/* ── Translate CTA ────────────────────────────────────────────── */
.translate-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: .88rem;
  font-weight: 500;
  letter-spacing: .02em;
  cursor: pointer;
  transition:
    background var(--transition),
    box-shadow var(--transition),
    transform var(--transition),
    opacity var(--transition);
  box-shadow: 0 4px 16px rgba(45,106,79,.25);
  position: relative;
  overflow: hidden;
}
.translate-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.15) 0%, transparent 60%);
}
.translate-btn:hover:not(:disabled) {
  background: var(--accent-dk);
  box-shadow: 0 6px 22px rgba(45,106,79,.38);
  transform: translateY(-1px);
}
.translate-btn:active:not(:disabled) {
  transform: translateY(0) scale(.97);
  box-shadow: 0 2px 8px rgba(45,106,79,.2);
}
.translate-btn:disabled {
  opacity: .6;
  cursor: default;
  transform: none;
}
/* Loading state */
.translate-btn.loading .btn-label { opacity: 0; }
.translate-btn.loading .btn-spinner { display: block; }
.btn-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  position: absolute;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Output states ────────────────────────────────────────────── */
.output-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--ink-3);
  text-align: center;
  padding: 32px 0;
}
.empty-icon {
  font-size: 1.6rem;
  opacity: .4;
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: .4; transform: scale(1); }
  50%       { opacity: .7; transform: scale(1.1); }
}
.output-empty p { font-size: .88rem; letter-spacing: .01em; }

/* ── Result blocks ────────────────────────────────────────────── */
.output-result {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.result-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: fade-up .3s cubic-bezier(.2,1,.3,1) both;
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-label {
  font-size: .65rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.result-text {
  font-family: var(--font-sans);
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink-2);
}
.result-main {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.55;
  color: var(--ink);
  font-weight: 400;
}
.result-translated {
  padding: 16px;
  background: var(--accent-lt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
}

/* ── Error state ──────────────────────────────────────────────── */
.output-error {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--danger);
  text-align: center;
  padding: 24px 0;
}
.error-icon { font-size: 1.4rem; }
.output-error p { font-size: .88rem; }

/* ── Footer ───────────────────────────────────────────────────── */
.footer {
  text-align: center;
  font-size: .75rem;
  color: var(--ink-3);
  letter-spacing: .04em;
}
.footer strong { color: var(--ink-2); font-weight: 500; }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 680px) {
  .app-shell { padding: 28px 16px 24px; }

  .lang-row { padding: 20px 20px 16px; gap: 10px; flex-direction: column; }
  .swap-btn { margin-top: 0; align-self: center; transform: rotate(90deg); }
  .swap-btn:hover { transform: rotate(270deg); }

  .panes { grid-template-columns: 1fr; grid-template-rows: auto 1px auto; }
  .pane-sep { margin: 0 24px; height: 1px; width: auto; }
  .pane { padding: 20px; }

  .card-divider { margin: 0 20px; }

  .result-main { font-size: 1.15rem; }
}