html,
body {
  height: 100%;
}

:root {
  --app-bg: #ffffff;
  --app-text: #0f172a;
  --app-surface: #ffffff;
  --app-surface-muted: #f6fbf8;
  --app-border: rgba(22, 101, 52, 0.16);
  --app-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
  --accent-1: #166534;
  --accent-2: #22c55e;
  --bubble-user: #166534;
  --bubble-assistant: #ffffff;
  --bubble-text-user: #ffffff;
  --bubble-text-assistant: #0f172a;
  --code-bg: #1f2937;
  --code-text: #f8fafc;
  --inline-code-bg: #e2e8f0;
  --inline-code-text: #1e293b;
  --modal-overlay: rgba(15, 23, 42, 0.45);

  --ion-background-color: var(--app-bg);
  --ion-text-color: var(--app-text);
  --ion-toolbar-background: rgba(255, 255, 255, 0.92);
  --ion-toolbar-color: var(--app-text);
  --ion-item-background: transparent;
  --ion-border-color: var(--app-border);
  --ion-card-background: var(--app-surface);
  --ion-color-primary: var(--accent-1);
  --ion-color-primary-rgb: 22, 101, 52;
  --ion-color-primary-contrast: #ffffff;
  --ion-color-primary-contrast-rgb: 255, 255, 255;
  --ion-color-primary-shade: #14532d;
  --ion-color-primary-tint: #22c55e;
  --ion-color-light: #f6fbf8;
  --ion-color-light-rgb: 246, 251, 248;
  --ion-color-light-contrast: #0f172a;
  --ion-color-light-contrast-rgb: 15, 23, 42;
  --ion-color-light-shade: #d8ddd9;
  --ion-color-light-tint: #f7fbf9;
}

body.dark-theme {
  --app-bg: #000000;
  --app-text: #f8fafc;
  --app-surface: #111111;
  --app-surface-muted: #101010;
  --app-border: rgba(74, 222, 128, 0.26);
  --app-shadow: 0 18px 34px rgba(0, 0, 0, 0.48);
  --accent-1: #4ade80;
  --accent-2: #22c55e;
  --bubble-user: #15803d;
  --bubble-assistant: #131313;
  --bubble-text-user: #f8fafc;
  --bubble-text-assistant: #e2e8f0;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --inline-code-bg: #1e293b;
  --inline-code-text: #dbeafe;
  --modal-overlay: rgba(0, 0, 0, 0.65);

  --ion-background-color: var(--app-bg);
  --ion-text-color: var(--app-text);
  --ion-toolbar-background: rgba(0, 0, 0, 0.9);
  --ion-toolbar-color: var(--app-text);
  --ion-color-light: #101010;
  --ion-color-light-rgb: 16, 16, 16;
  --ion-color-light-contrast: #f8fafc;
  --ion-color-light-contrast-rgb: 248, 250, 252;
  --ion-color-light-shade: #0e0e0e;
  --ion-color-light-tint: #282828;
}

body,
ion-app,
ion-content {
  font-family: "Poppins", "Segoe UI", sans-serif;
}

.app-bg {
  position: relative;
  min-height: 100vh;
  color: var(--app-text);
  background: var(--app-bg);
}

.chat-page.app-bg {
  min-height: 100dvh;
}

.chat-page ion-app {
  height: 100%;
}

.app-bg::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 8% 10%, rgba(34, 197, 94, 0.12), transparent 34%),
    radial-gradient(circle at 88% 12%, rgba(22, 101, 52, 0.08), transparent 30%),
    radial-gradient(circle at 18% 86%, rgba(74, 222, 128, 0.1), transparent 32%);
  z-index: 0;
}

ion-app,
ion-header,
ion-content,
ion-footer {
  position: relative;
  z-index: 1;
}

ion-toolbar {
  border-bottom: 1px solid var(--app-border);
  backdrop-filter: blur(8px);
}

ion-card {
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
}

ion-button {
  --border-radius: 10px;
}

.theme-toggle-btn {
  --padding-start: 8px;
  --padding-end: 8px;
  --color: var(--accent-1);
}

.center-card {
  max-width: 540px;
  margin: 48px auto;
}

.login-theme-toggle {
  display: flex;
  justify-content: flex-end;
  margin: 8px auto 0;
  max-width: 540px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.chat-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
}

.chat-content {
  --padding-bottom: 8px;
}

.bubble {
  max-width: 80%;
  border-radius: 16px;
  padding: 10px 12px;
  line-height: 1.45;
}

.bubble.user {
  align-self: flex-end;
  background: var(--bubble-user);
  color: var(--bubble-text-user);
  white-space: pre-wrap;
}

.bubble.assistant {
  align-self: flex-start;
  width: 100%;
  max-width: 100%;
  background: var(--bubble-assistant);
  color: var(--bubble-text-assistant);
  border: 1px solid var(--app-border);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
}

.bubble.assistant p {
  margin: 0 0 10px;
}

.bubble.assistant p:last-child {
  margin-bottom: 0;
}

.bubble.assistant pre {
  margin: 10px 0;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  padding: 10px 12px 38px;
  overflow-x: auto;
  position: relative;
}

.code-copy-btn {
  position: absolute;
  right: 10px;
  bottom: 8px;
  border: 1px solid rgba(248, 250, 252, 0.55);
  border-radius: 7px;
  background: rgba(248, 250, 252, 0.12);
  color: #f8fafc;
  font-size: 0.72rem;
  line-height: 1;
  padding: 4px 8px;
  cursor: pointer;
}

.code-copy-btn:hover,
.code-copy-btn:focus-visible {
  background: rgba(248, 250, 252, 0.26);
}

.bubble.assistant code {
  font-family: "Fira Code", "Consolas", monospace;
  font-size: 0.92em;
}

.bubble.assistant :not(pre) > code {
  background: var(--inline-code-bg);
  color: var(--inline-code-text);
  border-radius: 6px;
  padding: 1px 6px;
}

.bubble.assistant .katex-display {
  margin: 10px 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.bubble.assistant ul,
.bubble.assistant ol {
  margin: 0 0 10px;
  padding-left: 20px;
}

.bubble.assistant li + li {
  margin-top: 4px;
}

.mermaid-diagram {
  margin: 10px 0;
  padding: 8px;
  border-radius: 10px;
  background: var(--app-surface-muted);
  border: 1px solid var(--app-border);
  overflow-x: auto;
}

.mermaid-diagram svg {
  max-width: 100%;
  height: auto;
}

.bubble-usage {
  margin-top: 8px;
  padding-top: 6px;
  border-top: 1px solid rgba(100, 116, 139, 0.3);
  color: #64748b;
  font-size: 0.78rem;
  line-height: 1.35;
}

.session-usage {
  margin-left: 10px;
  color: #64748b;
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
}

.chat-toolbar-end {
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-header-actions {
  gap: 2px;
}

.chat-header-actions ion-button {
  --padding-start: 10px;
  --padding-end: 10px;
}

.btn-label {
  margin-left: 4px;
}

.input-resizer {
  height: 12px;
  cursor: ns-resize;
  background: linear-gradient(180deg, rgba(148, 163, 184, 0.12), rgba(148, 163, 184, 0.28));
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.input-resizer::after {
  content: "";
  display: block;
  width: 50px;
  height: 3px;
  border-radius: 999px;
  background: rgba(71, 85, 105, 0.6);
  margin: 4px auto;
}

ion-footer {
  border-top: 1px solid var(--app-border);
  background: var(--app-surface);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

ion-footer ion-toolbar {
  --background: var(--app-surface);
  --min-height: 0;
  --padding-start: 8px;
  --padding-end: 8px;
  --padding-top: 6px;
  --padding-bottom: 6px;
}

.chat-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: flex-end;
  gap: 8px;
  width: 100%;
  padding: 4px 2px;
}

.chat-input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 56px;
  max-height: 46vh;
  resize: none;
  border: 1px solid var(--app-border);
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  background: var(--app-surface);
  color: var(--app-text);
}

#record-btn,
#send-btn {
  flex: 0 0 auto;
  margin: 0;
  min-width: 40px;
  min-height: 40px;
  --padding-start: 10px;
  --padding-end: 10px;
  --color: var(--accent-1);
}

#record-btn ion-icon,
#send-btn ion-icon {
  font-size: 1.1rem;
}

body.chat-resizing {
  cursor: ns-resize;
  user-select: none;
}

.profile-modal {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 16px;
}

.profile-modal-card {
  width: min(860px, 100%);
  max-height: 82vh;
  background: var(--app-surface);
  border-radius: 14px;
  box-shadow: 0 22px 48px rgba(15, 23, 42, 0.22);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.profile-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.profile-close-btn {
  border: 1px solid var(--app-border);
  background: var(--app-surface-muted);
  color: var(--app-text);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
}

.profile-content {
  margin: 0;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  padding: 12px;
  overflow: auto;
  max-height: 66vh;
  font-family: "Fira Code", "Consolas", monospace;
  font-size: 0.84rem;
  line-height: 1.45;
}

.error-banner {
  background: #b91c1c;
  color: #ffffff;
  padding: 10px 12px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.success-banner {
  background: #166534;
  color: #ffffff;
  padding: 10px 12px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.hidden {
  display: none;
}

@media (max-width: 768px) {
  ion-title {
    font-size: 0.96rem;
  }

  .session-usage {
    display: block;
    margin-left: 0;
    margin-top: 2px;
    font-size: 0.7rem;
  }

  .chat-header-actions {
    gap: 0;
  }

  #master-profile-btn,
  #end-session-btn,
  .theme-toggle-btn {
    --padding-start: 8px;
    --padding-end: 8px;
    min-height: 34px;
  }

  #master-profile-btn .btn-label,
  #end-session-btn .btn-label {
    display: none;
  }

  .chat-input-row {
    gap: 6px;
    padding: 4px 0;
  }

  .chat-input {
    min-height: 48px;
    max-height: 34vh;
  }

  #record-btn,
  #send-btn {
    --padding-start: 10px;
    --padding-end: 10px;
    min-height: 38px;
  }
}

@media (max-width: 480px) {
  .chat-input {
    min-height: 44px;
    max-height: 120px;
  }

  .input-resizer {
    display: block;
    height: 8px;
  }
}