:root {
  --bg: #eef3f1;
  --ink: #17211d;
  --muted: #68736e;
  --line: #d9e2de;
  --panel: #ffffff;
  --accent: #0f7b63;
  --accent-2: #e7a93c;
  --soft: #edf8f4;
  --danger: #b54747;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15, 123, 99, 0.12), transparent 34%),
    linear-gradient(225deg, rgba(231, 169, 60, 0.16), transparent 30%),
    var(--bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}

.auth-shell {
  width: min(1040px, 100%);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: stretch;
}

.auth-copy,
.auth-card,
.panel,
.metric-card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 24px 70px rgba(21, 45, 38, 0.12);
  backdrop-filter: blur(16px);
}

.auth-copy {
  min-height: 520px;
  border-radius: 28px;
  padding: 54px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-mark {
  width: 76px;
  height: 76px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: white;
  font-weight: 800;
  letter-spacing: 0;
}

.auth-copy h1,
.topbar h1 {
  margin: 22px 0 12px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}

.auth-copy p {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.auth-card {
  border-radius: 24px;
  padding: 30px;
  align-self: center;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 6px;
  background: #eef3f1;
  border-radius: 14px;
  margin-bottom: 22px;
}

.tabs a {
  text-align: center;
  color: var(--muted);
  text-decoration: none;
  padding: 12px;
  border-radius: 10px;
  font-weight: 700;
}

.tabs a.active {
  background: white;
  color: var(--ink);
  box-shadow: 0 8px 22px rgba(21, 45, 38, 0.08);
}

.form-grid,
.settings-form {
  display: grid;
  gap: 18px;
}

label {
  display: grid;
  gap: 8px;
}

label span,
.check-row > span,
.metric-card span,
.eyebrow {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--ink);
  background: white;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 123, 99, 0.1);
}

.primary-btn,
.ghost-btn {
  border: 0;
  border-radius: 12px;
  padding: 13px 16px;
  font-weight: 800;
  cursor: pointer;
}

.primary-btn {
  background: var(--accent);
  color: white;
}

.ghost-btn {
  width: 100%;
  color: var(--ink);
  background: #eef3f1;
}

.auth-status,
.db-pill,
.flash {
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
}

.auth-status.ok,
.flash.success {
  background: var(--soft);
  color: var(--accent);
}

.auth-status.warn,
.flash.error {
  background: #fff3f0;
  color: var(--danger);
}

.flash-stack {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  transition: grid-template-columns 0.18s ease;
}

.app-shell.sidebar-collapsed {
  grid-template-columns: 86px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 26px;
  background: rgba(255, 255, 255, 0.7);
  border-right: 1px solid rgba(255, 255, 255, 0.7);
  display: flex;
  flex-direction: column;
  gap: 28px;
  overflow: hidden;
}

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

.brand-line span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: white;
  font-weight: 900;
}

.sidebar-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: white;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.app-shell.sidebar-collapsed .sidebar {
  padding: 22px;
  align-items: center;
}

.app-shell.sidebar-collapsed .brand-line > div:last-child,
.app-shell.sidebar-collapsed .nav-text,
.app-shell.sidebar-collapsed .sidebar form {
  display: none;
}

.app-shell.sidebar-collapsed .sidebar-head,
.app-shell.sidebar-collapsed nav {
  width: 42px;
}

.app-shell.sidebar-collapsed nav a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  padding: 0;
}

nav {
  display: grid;
  gap: 8px;
}

nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 12px;
  border-radius: 12px;
  white-space: nowrap;
  font-weight: 700;
}

nav a:hover {
  background: #eef3f1;
}

.main-panel {
  padding: 34px;
  display: grid;
  gap: 24px;
}

.topbar,
.panel-heading,
.form-row,
.check-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.user-chip {
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  background: white;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 800;
  cursor: pointer;
}

.user-dropdown {
  position: relative;
  display: inline-block;
}

.user-dropdown > summary {
  list-style: none;
  display: inline-block;
  cursor: pointer;
}

.user-dropdown > summary::-webkit-details-marker {
  display: none;
}

.user-dropdown > summary .user-chip::after {
  content: " ▾";
  font-size: 0.7rem;
  vertical-align: middle;
}

.user-dropdown[open] > summary .user-chip {
  background: #f0f4ff;
  border-color: var(--accent);
}

.user-dropdown .drop-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  min-width: 160px;
  z-index: 100;
  padding: 6px 0;
}

.user-dropdown .drop-menu a,
.user-dropdown .drop-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 18px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.user-dropdown .drop-menu a:hover,
.user-dropdown .drop-menu button:hover {
  background: #f0f4ff;
}

.user-dropdown .drop-menu .drop-divider {
  border-top: 1px solid var(--line);
  margin: 4px 0;
}

.nav-link-external {
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  background: #f0f4ff;
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 600;
  font-size: 0.88rem;
  transition: background 0.15s;
}

.nav-link-external:hover {
  background: #dbeafe;
  border-color: var(--accent);
}

.model-switcher select {
  min-width: 178px;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 800;
  background: white;
}

.subtabs {
  display: inline-flex;
  gap: 6px;
  padding: 6px;
  border-radius: 14px;
  background: #eef3f1;
  margin-bottom: 18px;
}

.subtabs button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  cursor: pointer;
}

.subtabs button.active {
  background: white;
  color: var(--ink);
  box-shadow: 0 8px 22px rgba(21, 45, 38, 0.08);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.topbar h1,
.panel h2 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 5px;
  text-transform: uppercase;
}

.db-pill {
  background: var(--panel);
  color: var(--accent);
  border: 1px solid var(--line);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-card {
  align-content: start;
}

.action-card {
  color: inherit;
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.action-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 80px rgba(21, 45, 38, 0.16);
}

.action-card p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.7;
}

.metric-card {
  border-radius: 18px;
  padding: 20px;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

.metric-card.compact {
  box-shadow: none;
  border-color: var(--line);
}

.panel {
  border-radius: 22px;
  padding: 24px;
}

.form-row {
  align-items: start;
}

.form-row > label {
  flex: 1;
}

.form-row.four {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.check-row {
  justify-content: flex-start;
  flex-wrap: wrap;
}

.check-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  width: auto;
  padding: 9px 12px;
  border-radius: 999px;
  background: #eef3f1;
}

.check-pill input {
  width: auto;
}

.provider-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.provider-tags span {
  border-radius: 999px;
  padding: 8px 10px;
  background: #eef3f1;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.provider-tags span.ready {
  background: var(--soft);
  color: var(--accent);
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline-item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.timeline-item summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.timeline-item span,
.empty-text {
  color: var(--muted);
}

.record-meta {
  margin: 4px 0;
  font-size: 0.92rem;
  word-break: break-word;
}

.record-question {
  font-size: 1.05rem;
  line-height: 1.7;
  background: #f8fafc;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

.ai-output-inline {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 10px 0 0;
  padding: 14px;
  border-radius: 12px;
  background: #f6faf8;
  color: var(--ink);
  border: 1px solid var(--line);
  font-family: monospace;
  font-size: 0.85rem;
  line-height: 1.7;
}

.result-panel pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  padding: 18px;
  border-radius: 14px;
  background: #f6faf8;
  color: var(--ink);
  border: 1px solid var(--line);
  line-height: 1.7;
}

.idea-box {
  margin-bottom: 18px;
  background: #fbf7ee;
}

.result-stack {
  display: grid;
  gap: 12px;
}

.result-accordion {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: white;
  overflow: hidden;
}

.result-accordion summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 900;
  list-style: none;
}

.result-accordion summary::-webkit-details-marker {
  display: none;
}

.result-accordion summary::after {
  content: "+";
  float: right;
  color: var(--accent);
}

.result-accordion[open] summary::after {
  content: "-";
}

.result-body {
  padding: 0 18px 18px;
  color: var(--ink);
  line-height: 1.7;
}

.answer-form {
  margin: 14px 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f9fbfa;
}

.nested-answer {
  margin-top: 12px;
  background: #f6faf8;
}

.speak-btn {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  background: white;
  color: var(--accent);
  font-weight: 900;
  cursor: pointer;
  margin-left: 8px;
}

.result-body pre,
.ai-output-inline {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 10px 0 0;
  padding: 14px;
  border-radius: 12px;
  background: #f6faf8;
  color: var(--ink);
  border: 1px solid var(--line);
}

.result-body ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.filter-btn {
  align-self: end;
}

.theme-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  background: var(--panel);
}

.theme-card h3 {
  margin: 0 0 6px;
}

.theme-card > details {
  margin-top: 8px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.two-col .eyebrow {
  margin: 0 0 6px;
}

.tag {
  display: inline-block;
  background: #eef2ff;
  color: var(--ink);
  border-radius: 8px;
  padding: 3px 10px;
  font-size: 0.82rem;
  margin: 2px 4px 2px 0;
  line-height: 1.6;
}

.tag-accent {
  background: #fef3c7;
}

.tag-row {
  margin: 8px 0 0;
  line-height: 2.2;
}

.vocab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.word-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  display: grid;
  gap: 14px;
  box-shadow: 0 18px 50px rgba(21, 45, 38, 0.08);
}

.word-card.learned {
  border-color: rgba(15, 123, 99, 0.35);
  background: linear-gradient(180deg, #ffffff, #f2fbf7);
}

.word-top {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 14px;
}

.word-top h2 {
  margin: 0 0 5px;
  font-size: 28px;
}

.word-top span,
.meaning {
  color: var(--muted);
}

.meaning {
  margin: 0;
  font-size: 18px;
}

.phrase-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.phrase-list span {
  padding: 8px 10px;
  border-radius: 999px;
  background: #eef3f1;
  font-size: 13px;
  font-weight: 700;
}

.essay-use {
  padding: 14px;
  border-radius: 14px;
  background: #fbf7ee;
  border: 1px solid #f0dfbd;
}

.essay-use p {
  margin: 8px 0 0;
  color: #4a4234;
  line-height: 1.6;
}

.word-popup {
  position: absolute;
  z-index: 40;
  width: min(340px, calc(100vw - 28px));
  display: none;
  padding: 16px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 60px rgba(21, 45, 38, 0.2);
}

.word-popup.show {
  display: block;
}

.word-popup-title {
  font-weight: 900;
  margin-bottom: 8px;
}

.word-popup-body {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.word-popup-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.word-popup-actions button {
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--accent);
  color: white;
  font-weight: 800;
}

.ghost-btn.small {
  width: auto;
  padding: 9px 11px;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .auth-shell,
  .app-shell,
  .metric-grid,
  .feature-grid,
  .feature-grid.two,
  .vocab-grid,
  .form-row,
  .form-row.four {
    grid-template-columns: 1fr;
  }

  .auth-shell {
    display: grid;
  }

  .auth-copy {
    min-height: auto;
    padding: 34px;
  }

  .app-shell {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .topbar,
  .panel-heading,
  .form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .sidebar-head,
  .user-menu,
  .subtabs {
    width: 100%;
  }

  .app-shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .app-shell.sidebar-collapsed .brand-line > div:last-child,
  .app-shell.sidebar-collapsed .nav-text,
  .app-shell.sidebar-collapsed .sidebar form {
    display: block;
  }
}

.voice-input-wrapper {
  position: relative;
}

.voice-input-wrapper textarea {
  padding-right: 44px;
}

.voice-btn {
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: #f0f4ff;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.voice-btn:hover {
  background: #dbeafe;
}

.voice-btn.listening {
  background: #dc2626;
  color: #fff;
  animation: pulse 0.8s infinite;
}

@keyframes voicePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(220, 38, 38, 0); }
}

.voice-input-wrapper textarea {
  padding-right: 80px;
}

.voice-btn-bar {
  position: absolute;
  right: 4px;
  bottom: 4px;
  display: flex;
  gap: 4px;
}

.voice-btn-bar .voice-btn {
  position: static;
}

.rec-btn {
  background: #fef3c7;
}

.rec-btn:hover {
  background: #fde68a;
}

.voice-score-box {
  margin-top: 8px;
  padding: 10px 14px;
  background: #f0fdf4;
  border: 1px solid #86efac;
  border-radius: 8px;
  font-size: 0.9rem;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.cue-card-body { font-size: 0.95rem; line-height: 1.7; }
.cue-card-body h2 { font-size: 1.15rem; color: var(--accent); margin-bottom: 0.3rem; }
.cue-card-body h3 { font-size: 1.05rem; margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 1px; }
.cue-card-body ul { padding-left: 1.4rem; margin: 0.4rem 0; }
.cue-card-body li { margin: 0.2rem 0; }
.panel-description {
  padding: 10px 14px;
  margin-bottom: 12px;
  background: #f0f4ff;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  font-size: 0.9rem;
  line-height: 1.6;
}