:root {
  color-scheme: dark;
  --bg: #09090b;
  --panel: #111114;
  --panel-border: #23232a;
  --text: #f3f4f6;
  --muted: #a1a1aa;
  --accent: #6366f1;
  --accent-strong: #4f46e5;
  --ok: #22c55e;
  --error: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: radial-gradient(
    circle at 20% 20%,
    #16162b 0%,
    #09090b 45%,
    #050507 100%
  );
  color: var(--text);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 560px);
  background: color-mix(in oklab, var(--panel), black 8%);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  padding: 28px;
}

.auth-card {
  width: min(100%, 460px);
}

.card-header h1 {
  margin: 0 0 8px;
  font-size: 1.7rem;
  line-height: 1.2;
}

.badge {
  display: inline-flex;
  align-items: center;
  margin: 0 0 12px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(99, 102, 241, 0.15);
  color: #c7d2fe;
  border: 1px solid rgba(129, 140, 248, 0.35);
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.user-row {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.user-name {
  font-size: 0.9rem;
  color: #d4d4d8;
}

.logout-btn {
  appearance: none;
  border: 1px solid #3f3f48;
  border-radius: 10px;
  background: #15151a;
  color: #f4f4f5;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 10px;
  cursor: pointer;
}

.logout-btn:hover {
  border-color: var(--accent);
}

.reset-usage-btn {
  appearance: none;
  border: 1px dashed #4b5563;
  border-radius: 10px;
  background: #121218;
  color: #d1d5db;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 7px 10px;
  cursor: pointer;
}

.reset-usage-btn:hover {
  border-color: #9ca3af;
}

.upload-form {
  margin-top: 22px;
  display: grid;
  gap: 14px;
}

.auth-form {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.field-label {
  font-size: 0.9rem;
  color: #d4d4d8;
  font-weight: 500;
}

.text-input {
  width: 100%;
  border: 1px solid #3f3f48;
  border-radius: 10px;
  background: #0f0f14;
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
}

.text-input:focus {
  outline: 2px solid rgba(99, 102, 241, 0.45);
  outline-offset: 1px;
}

.auth-link-row {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-link {
  color: #c7d2fe;
  text-decoration: none;
  margin-left: 4px;
  font-weight: 600;
}

.auth-link:hover {
  text-decoration: underline;
}

.dropzone {
  border: 1.5px dashed #3f3f48;
  border-radius: 14px;
  padding: 26px;
  text-align: center;
  background: #0c0c10;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease;
  cursor: pointer;
}

.dropzone:hover,
.dropzone:focus-within,
.dropzone.drag-over {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.08);
  transform: translateY(-1px);
}

#file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.dropzone-title {
  margin: 0;
  font-weight: 600;
}

.dropzone-hint {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.selected-file {
  min-height: 24px;
  font-size: 0.95rem;
  color: #d4d4d8;
}

.submit-btn {
  appearance: none;
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 1rem;
  color: white;
  background: linear-gradient(
    135deg,
    var(--accent) 0%,
    var(--accent-strong) 100%
  );
  cursor: pointer;
  transition:
    transform 0.15s ease,
    opacity 0.15s ease,
    filter 0.15s ease;
}

.submit-btn:hover:enabled {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.submit-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.transcript-panel {
  margin-top: 16px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: #0c0c10;
  padding: 12px;
}

.transcript-panel h2 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: #d4d4d8;
}

.transcript-subtitle {
  margin-top: 8px;
  font-size: 0.88rem;
}

.transcript-form {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.transcript-form .text-input {
  flex: 1;
  min-width: 230px;
}

.transcript-submit-btn {
  white-space: nowrap;
  padding: 10px 14px;
  font-size: 0.92rem;
}

.transcript-output {
  margin: 8px 0 0;
  min-height: 84px;
  max-height: 260px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: #d4d4d8;
  font-size: 0.9rem;
  line-height: 1.45;
  border: 1px solid #2c2c33;
  border-radius: 10px;
  background: #111118;
  padding: 10px;
}

.transcript-copy-btn {
  margin-top: 10px;
}

.debug-panel {
  margin-top: 6px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: #0c0c10;
  padding: 12px;
}

.debug-panel h2 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #d4d4d8;
}

.multipart-keys {
  margin: 0 0 10px;
  color: #a1a1aa;
  font-size: 0.82rem;
}

.copy-btn {
  appearance: none;
  border: 1px solid #3f3f48;
  background: #15151a;
  color: #e4e4e7;
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin: 0 0 10px;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: #ffffff;
}

.payload-preview {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #c4b5fd;
  font-size: 0.85rem;
  line-height: 1.4;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

.status {
  margin-top: 16px;
  min-height: 24px;
  font-size: 0.95rem;
}

/* ── Nav link ─────────────────────────────────────────────────── */

.nav-link {
  color: #c7d2fe;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  padding: 7px 10px;
  border: 1px solid #3f3f48;
  border-radius: 10px;
  background: #15151a;
}

.nav-link:hover {
  border-color: var(--accent);
}

/* ── Chat layout ──────────────────────────────────────────────── */

.chat-shell {
  align-items: stretch;
  padding: 0;
}

.chat-card {
  width: min(100%, 720px);
  height: 100vh;
  max-height: 100vh;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  margin: 0 auto;
}

@media (min-width: 760px) {
  .chat-shell {
    padding: 24px;
    align-items: center;
  }

  .chat-card {
    height: calc(100vh - 48px);
    border-radius: 20px;
  }
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
}

.chat-header-left h1 {
  margin: 4px 0 0;
  font-size: 1.3rem;
}

.chat-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

.chat-bubble {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: 14px;
  line-height: 1.5;
  font-size: 0.95rem;
}

.chat-bubble--user {
  align-self: flex-end;
  background: linear-gradient(
    135deg,
    var(--accent) 0%,
    var(--accent-strong) 100%
  );
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-bubble--assistant {
  align-self: flex-start;
  background: #18181f;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.chat-bubble--system {
  align-self: center;
  background: transparent;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 4px 0;
}

.chat-bubble-text {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--panel-border);
  flex-shrink: 0;
}

.chat-text-input {
  flex: 1;
  margin: 0;
}

.chat-submit-btn {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: 0.95rem;
}

.status.success {
  color: var(--ok);
}

.status.error {
  color: var(--error);
}

.app-card {
  width: min(100%, 980px);
  padding: 24px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}

.account-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tier-badge {
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tier-badge--free {
  color: #a7f3d0;
  border: 1px solid rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.16);
}

.tier-badge--pro {
  color: #fde68a;
  border: 1px solid rgba(245, 158, 11, 0.45);
  background: rgba(245, 158, 11, 0.16);
}

.tier-usage {
  font-size: 0.82rem;
  color: var(--muted);
}

.tab-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.tab-btn {
  appearance: none;
  border: 1px solid #3f3f48;
  border-radius: 10px;
  background: #15151a;
  color: #e5e7eb;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 9px 12px;
  cursor: pointer;
}

.tab-btn.is-active {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.2);
  color: #ffffff;
}

.tab-panel {
  display: none;
}

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

.panel-title {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.usage-hint {
  margin: -4px 0 14px;
  padding: 10px 12px;
  border: 1px solid rgba(129, 140, 248, 0.22);
  border-radius: 12px;
  background: rgba(99, 102, 241, 0.08);
  color: #d6dbff;
  font-size: 0.9rem;
  line-height: 1.45;
}

.chat-usage-hint {
  max-width: 36rem;
  margin: 4px 0 0;
}

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

.history-refresh-btn {
  margin: 0;
}

.history-subtitle {
  margin-bottom: 10px;
}

.history-list {
  margin-top: 8px;
  display: grid;
  gap: 10px;
}

.history-card {
  display: grid;
  grid-template-columns: 136px 1fr;
  gap: 10px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: #0c0c10;
  padding: 10px;
}

.history-face {
  width: 136px;
  height: 136px;
  border-radius: 8px;
  background: #13131a;
  border: 1px solid #2e2e37;
  object-fit: cover;
}

.history-face-link {
  display: inline-block;
  width: 136px;
  height: 136px;
  border-radius: 8px;
  overflow: hidden;
}

.history-title {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.3;
}

.history-link {
  color: #c7d2fe;
  text-decoration: none;
}

.history-link:hover {
  text-decoration: underline;
}

.history-meta {
  margin: 4px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.history-snippet {
  margin: 6px 0 0;
  font-size: 0.86rem;
  color: #d4d4d8;
  line-height: 1.45;
}

#tab-chat {
  height: 62vh;
  max-height: 62vh;
  display: none;
  flex-direction: column;
}

#tab-chat.is-active {
  display: flex;
}

#tab-chat .chat-messages {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: #0c0c10;
  min-height: 0;
}

#tab-chat .chat-input-row {
  margin-top: 10px;
  border-top: 0;
  padding: 0;
}

/* Upgrade Modal Styles */
.upgrade-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.upgrade-modal[aria-hidden="true"] {
  display: none;
}

.upgrade-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.upgrade-modal-content {
  position: relative;
  z-index: 1001;
  width: min(100%, 600px);
  background: color-mix(in oklab, var(--panel), black 8%);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 40px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 30px 120px rgba(0, 0, 0, 0.6);
}

.upgrade-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.upgrade-modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.upgrade-modal-close:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.upgrade-modal-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: var(--text);
}

.upgrade-modal-status {
  margin: 0 0 16px;
  min-height: 24px;
  text-align: center;
}

.upgrade-modal-subtitle {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 32px 0;
  line-height: 1.5;
}

.upgrade-plan-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 0;
}

.upgrade-plan-card {
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: color-mix(in oklab, var(--panel), black 12%);
  position: relative;
  transition: all 0.2s ease;
}

.upgrade-plan-free {
  opacity: 0.7;
}

.upgrade-plan-pro {
  border-color: var(--accent);
  background: color-mix(in oklab, var(--panel), var(--accent) 5%);
  transform: scale(1.02);
}

.upgrade-plan-badge {
  position: absolute;
  top: -12px;
  left: 16px;
  background: var(--accent);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.upgrade-plan-name {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 4px 0;
  color: var(--text);
}

.upgrade-plan-current {
  font-size: 12px;
  color: var(--ok);
  margin: 0 0 16px 0;
  font-weight: 500;
}

.upgrade-plan-price {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 16px 0;
}

.upgrade-plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
}

.upgrade-plan-features li {
  font-size: 13px;
  color: var(--muted);
  padding: 6px 0;
  line-height: 1.5;
}

.upgrade-plan-pro .upgrade-plan-features li {
  color: var(--text);
}

.upgrade-btn {
  width: 100%;
  padding: 12px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.upgrade-btn:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.upgrade-btn:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.upgrade-btn:active {
  transform: translateY(0);
}

@media (max-width: 760px) {
  .app-shell {
    padding: 14px;
  }

  .app-card {
    padding: 16px;
  }

  .app-header {
    flex-direction: column;
  }

  .account-cluster {
    justify-content: flex-start;
  }

  .tab-nav {
    overflow-x: auto;
    padding-bottom: 10px;
  }

  #tab-chat {
    height: 56vh;
    max-height: 56vh;
  }

  .upgrade-modal-content {
    width: min(100%, 85vw);
    padding: 24px;
  }

  .upgrade-modal-title {
    font-size: 22px;
    margin-bottom: 8px;
  }

  .upgrade-plan-comparison {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .upgrade-plan-pro {
    transform: scale(1);
  }
}