:root {
  --bg: #f6f8fc;
  --card: #ffffff;
  --border: #e1e5ea;
  --text: #1f2329;
  --muted: #6b7280;
  --accent: #1a73e8;
  --accent-dark: #1557b0;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Ensure the HTML `hidden` attribute always overrides display rules below. */
[hidden] {
  display: none !important;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
}

.brand h1 {
  font-size: 20px;
  margin: 0;
  font-weight: 600;
}

.tagline {
  color: var(--muted);
  font-size: 13px;
}

.card {
  max-width: 960px;
  margin: 28px auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.lang-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.lang-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
}

.swap-btn {
  border: 1px solid var(--border);
  background: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  color: var(--accent);
  transition: background 0.15s;
}

.swap-btn:hover {
  background: #eef3fd;
}

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.pane {
  display: flex;
  flex-direction: column;
  min-height: 240px;
  border-right: 1px solid var(--border);
}

.pane.output {
  border-right: none;
  background: #fbfcfe;
}

.text-area {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  padding: 18px;
  font-size: 17px;
  line-height: 1.5;
  font-family: inherit;
  background: transparent;
  color: var(--text);
}

.output-text {
  white-space: pre-wrap;
  overflow-y: auto;
  color: var(--text);
}

.output-text:empty::before {
  content: "Translation";
  color: var(--muted);
}

.pane-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  min-height: 44px;
}

.icon-btn {
  border: none;
  background: transparent;
  font-size: 16px;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  line-height: 1;
}

.icon-btn:hover {
  background: #eef3fd;
}

.counter {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

.status {
  font-size: 12px;
  color: var(--muted);
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.voice-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.voice-select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font-size: 13px;
}

.translate-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 11px 26px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.translate-btn:hover {
  background: var(--accent-dark);
}

.translate-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.hint {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 30px;
}

.spinner {
  display: inline-block;
  width: 13px;
  height: 13px;
  border: 2px solid #cdd6e4;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 640px) {
  .panes {
    grid-template-columns: 1fr;
  }

  .pane {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

/* ----- Auth ----- */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logout-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
}

.logout-btn:hover {
  background: #f1f3f7;
}

.login-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #eef3fd, #f6f8fc);
  display: grid;
  place-items: center;
  z-index: 50;
}

/* The `hidden` attribute must win over `display: grid` above. */
.login-overlay[hidden] {
  display: none;
}

.login-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 36px 32px;
  width: min(360px, 90vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}

.logo.big {
  width: 48px;
  height: 48px;
  font-size: 26px;
  border-radius: 12px;
  margin-bottom: 6px;
}

.login-box h2 {
  margin: 0;
  font-size: 22px;
}

.login-sub {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
}

.login-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  margin-bottom: 6px;
}

.login-input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-btn {
  width: 100%;
}

.login-error {
  color: #d93025;
  font-size: 13px;
  min-height: 18px;
  margin: 4px 0 0;
}

body.locked {
  overflow: hidden;
}