/* ─── Reset & Base ──────────────────────────────────────────────────── */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #1B5E4B;
  --color-primary-hover: #164D3E;
  --color-primary-light: #E8F5EF;
  --color-secondary: #5CB896;
  --color-secondary-light: #E5F4ED;
  --color-bg: #F4F9F7;
  --color-surface: #FFFFFF;
  --color-text: #1A2E28;
  --color-text-secondary: #5A7A6E;
  --color-text-tertiary: #8AA99C;
  --color-border: #D4E8DE;
  --color-border-light: #E4F0EA;
  --color-success: #2D8B5F;
  --color-success-light: #E8F5EE;
  --color-danger: #D94B4B;
  --color-danger-light: #FDF0F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(26, 46, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 46, 40, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
  font-family: var(--font);
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

/* ─── Layout ───────────────────────────────────────────────────────── */

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

/* ─── Login Page ───────────────────────────────────────────────────── */

.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  width: 100%;
  max-width: 420px;
}

.login-tagline {
  width: 100%;
  max-width: 420px;
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.login-logo {
  border-radius: 16px;
}

.login-title {
  font-size: 52px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -1px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  text-align: left;
}

.login-card-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

@media (max-width: 480px) {
  .login-brand {
    gap: 12px;
  }

  .login-logo {
    width: 52px !important;
    height: 52px !important;
  }

  .login-title {
    font-size: 36px;
  }

  .login-tagline {
    font-size: 18px;
  }

  .login-card {
    padding: 28px 20px;
  }
}

/* ─── Forms ────────────────────────────────────────────────────────── */

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  font-family: var(--font);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%237A736B'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.code-input {
  text-align: center;
  font-size: 24px !important;
  letter-spacing: 8px;
  font-weight: 600;
}

/* ─── Buttons ──────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: #FFE4DB;
}

.btn-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
  background: #FAE0E0;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-border-light);
}

/* ─── Error / Info Messages ────────────────────────────────────────── */

.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.alert-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

/* ─── Dashboard ────────────────────────────────────────────────────── */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
}

.header-left h1 {
  font-size: 22px;
  font-weight: 700;
}

.header-left p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.header-right {
  display: flex;
  gap: 8px;
}

/* ─── Tabs ─────────────────────────────────────────────────────────── */

.tabs {
  display: flex;
  gap: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab {
  flex: 1;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-text);
  background: var(--color-bg);
}

.tab.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  font-weight: 600;
}

/* ─── Cards ────────────────────────────────────────────────────────── */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

/* ─── Settings Rows ────────────────────────────────────────────────── */

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.setting-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.setting-row:first-child {
  padding-top: 0;
}

.setting-label {
  font-size: 14px;
  font-weight: 500;
}

.setting-description {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.setting-value {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ─── Toggle Switch ────────────────────────────────────────────────── */

.toggle {
  position: relative;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  border-radius: 14px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  transition: transform 0.2s;
}

.toggle input:checked + .toggle-track {
  background: var(--color-primary);
}

.toggle input:checked + .toggle-track::after {
  transform: translateX(20px);
}

/* ─── Pill / Badge ─────────────────────────────────────────────────── */

.badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  text-transform: capitalize;
}

.badge-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-muted {
  background: var(--color-border-light);
  color: var(--color-text-secondary);
}

/* ─── Messages ─────────────────────────────────────────────────────── */

.message-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message-item {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
  max-width: 85%;
  word-wrap: break-word;
}

.message-inbound {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  align-self: flex-start;
}

.message-outbound {
  background: var(--color-primary-light);
  align-self: flex-end;
}

.message-meta {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.message-type-badge {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

/* ─── Memory ───────────────────────────────────────────────────────── */

.memory-content {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  white-space: pre-wrap;
}

.memory-content h1, .memory-content h2, .memory-content h3 {
  margin-top: 16px;
  margin-bottom: 8px;
}

.memory-meta {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border-light);
}

/* ─── Empty State ──────────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.empty-state p {
  font-size: 14px;
}

/* ─── Danger Zone ──────────────────────────────────────────────────── */

.danger-zone {
  border-color: #F5D5D5;
}

.danger-zone .card-title {
  color: var(--color-danger);
}

/* ─── Loading ──────────────────────────────────────────────────────── */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ─── Load More ────────────────────────────────────────────────────── */

.load-more {
  text-align: center;
  padding: 16px;
}

/* ─── Confirm Dialog ───────────────────────────────────────────────── */

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(45, 42, 38, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.dialog {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(45, 42, 38, 0.15);
}

.dialog h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.dialog p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
}

.dialog-actions {
  display: flex;
  gap: 8px;
}

.dialog-actions .btn {
  flex: 1;
}

/* ─── Responsive ───────────────────────────────────────────────────── */

@media (max-width: 480px) {
  #app {
    padding: 16px 12px 48px;
  }

  .login-card {
    padding: 24px 20px;
  }

  .tabs {
    gap: 2px;
  }

  .tab {
    padding: 8px 8px;
    font-size: 13px;
  }
}