/* ==========================================================================
   Red Bot (redbot.team) — Clean Daylight SaaS Design System
   Palette: Pure White (#FFFFFF), Neutral Zinc (#F6F6F7), Deep Zinc Ink (#0A0A0C),
   Signal Crimson (#D9232E). Typography: Inter + JetBrains Mono.
   ========================================================================== */

:root {
  --bg: #FFFFFF;
  --bg-subtle: #F6F6F7;
  --bg-hover: #EFEFF1;
  --bg-active: #FEF2F2;

  --ink: #0A0A0C;
  --ink-secondary: #52525B;
  --ink-muted: #71717A;

  --accent: #D9232E;
  --accent-hover: #B81B24;
  --accent-ink: #991B1B;
  --accent-tint: #FEF2F2;
  --accent-border: #FECACA;

  --ok-ink: #14532D;
  --ok-bg: #F0FDF4;
  --ok-border: #BBF7D0;

  --warn-ink: #78350F;
  --warn-bg: #FFFBEB;
  --warn-border: #FDE68A;

  --err-ink: #991B1B;
  --err-bg: #FEF2F2;
  --err-border: #FECACA;

  --border: #E4E4E7;
  --border-input: #8A8A93;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--ink);
}

p {
  margin: 0;
}

.mono {
  font-family: var(--font-mono);
}

/* ==========================================================================
   Buttons & Inputs (Min 44px touch targets, >= 3:1 control borders)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--r-sm);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border-input);
  background-color: var(--bg);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease;
  white-space: nowrap;
}

.btn:hover {
  background-color: var(--bg-subtle);
}

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #FFFFFF;
}

.btn-sm {
  min-height: 38px;
  padding: 0 13px;
  font-size: 13px;
}

.input, .select, .textarea {
  width: 100%;
  min-height: 44px;
  padding: 9px 13px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-input);
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14.5px;
}

.textarea {
  min-height: 110px;
  resize: vertical;
  line-height: 1.55;
}

.input::placeholder, .textarea::placeholder {
  color: var(--ink-muted);
}

.label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 600;
  background-color: var(--bg-subtle);
  color: var(--ink-secondary);
  border: 1px solid var(--border);
}

.badge-ok {
  background-color: var(--ok-bg);
  color: var(--ok-ink);
  border-color: var(--ok-border);
}

.badge-red {
  background-color: var(--accent-tint);
  color: var(--accent-ink);
  border-color: var(--accent-border);
}

.badge-warn {
  background-color: var(--warn-bg);
  color: var(--warn-ink);
  border-color: var(--warn-border);
}

.alert {
  padding: 12px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  font-size: 14px;
  margin-bottom: 16px;
}
.alert-ok { background: var(--ok-bg); color: var(--ok-ink); border-color: var(--ok-border); }
.alert-warn { background: var(--warn-bg); color: var(--warn-ink); border-color: var(--warn-border); }
.alert-err { background: var(--err-bg); color: var(--err-ink); border-color: var(--err-border); }

/* ==========================================================================
   Public SaaS Shell (`/`, `/pricing`, `/signup`, `/login`, `/support`, `/terms`)
   ========================================================================== */

.pub-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 64px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.pub-nav-inner {
  max-width: 1160px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background-color: var(--accent);
  color: #FFFFFF;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pub-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-secondary);
}

.pub-links a:hover {
  color: var(--ink);
}

.pub-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero Section */
.hero {
  padding: 56px 0 64px;
  text-align: center;
}

.hero-title {
  font-size: clamp(34px, 5vw, 56px);
  max-width: 18ch;
  margin: 14px auto 16px;
}

.hero-sub {
  font-size: 18px;
  color: var(--ink-secondary);
  max-width: 54ch;
  margin: 0 auto 28px;
}

.claim-bar {
  max-width: 500px;
  margin: 0 auto 44px;
  display: flex;
  gap: 8px;
  padding: 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}

.claim-field {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
  padding: 0 12px;
  min-height: 44px;
}

.claim-field input {
  border: 0;
  background: transparent;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  outline: none;
}

.claim-suffix {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-secondary);
  white-space: nowrap;
}

/* Visual App Window Showcase */
.app-showcase {
  max-width: 1040px;
  margin: 0 auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: var(--bg);
  box-shadow: 0 24px 60px -15px rgba(10, 10, 12, 0.09), 0 4px 16px rgba(10, 10, 12, 0.04);
  overflow: hidden;
  text-align: left;
}

.app-showcase-top {
  height: 42px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.window-dots {
  display: flex;
  gap: 7px;
}
.window-dots i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: block;
  background: #D4D4D8;
}

/* 3 Visual Feature Cards */
.visual-features {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.visual-card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.visual-card-graphic {
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  padding: 20px;
  min-height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-card-body {
  padding: 20px;
}

.visual-card-body h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.visual-card-body p {
  font-size: 14px;
  color: var(--ink-secondary);
}

/* Public Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 32px;
}

.plan-card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.plan-card--featured {
  border: 2px solid var(--accent);
}

.plan-price {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 12px 0 4px;
}

.plan-list {
  list-style: none;
  padding: 16px 0 0;
  margin: 16px 0 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-secondary);
  flex: 1;
}

/* Public Footer */
.pub-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  padding: 40px 0;
  margin-top: 72px;
}

.pub-footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-size: 13.5px;
  color: var(--ink-secondary);
}

.pub-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.pub-footer-links a:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Auth Pages (`/signup`, `/login`) */
.auth-wrap {
  min-height: calc(100dvh - 180px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.auth-card {
  width: 100%;
  max-width: 430px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg);
  padding: 32px;
  box-shadow: 0 12px 32px rgba(10, 10, 12, 0.05);
}

.otp-code-box {
  width: 100%;
  min-height: 54px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 10px;
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
  margin: 8px 0 18px;
}

/* ==========================================================================
   Authenticated SaaS Dashboard Shell (`/app/*`)
   ========================================================================== */

.saas-shell {
  height: 100dvh;
  width: 100%;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  overflow: hidden;
  background: var(--bg);
}

.saas-sidebar {
  background: var(--bg-subtle);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  overflow-y: auto;
}

.saas-sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}

.saas-address-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 8px 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.saas-nav-group {
  margin-bottom: 18px;
}

.saas-nav-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  padding: 0 10px 6px;
}

.saas-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 40px;
  padding: 0 10px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-secondary);
}

.saas-nav-link:hover {
  background: var(--bg-hover);
  color: var(--ink);
}

.saas-nav-link[aria-current="page"] {
  background: var(--bg);
  color: var(--ink);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(10, 10, 12, 0.06);
}

.saas-meter {
  margin-top: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 12px;
}

.saas-meter-bar {
  height: 6px;
  background: var(--bg-subtle);
  border-radius: 99px;
  overflow: hidden;
  margin: 8px 0;
}

.saas-meter-fill {
  height: 100%;
  background: var(--accent);
}

.saas-main {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

.saas-topbar {
  height: 56px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
}

/* Inbox Split View inside `/app` */
.inbox-split {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
}

.inbox-list-col {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.inbox-search-bar {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.inbox-threads-scroll {
  flex: 1;
  overflow-y: auto;
}

.thread-row {
  display: flex;
  gap: 11px;
  padding: 13px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  transition: background-color 100ms ease;
}

.thread-row:hover {
  background: var(--bg-subtle);
}

.thread-row[aria-current="true"] {
  background: var(--bg-active);
  box-shadow: inset 3px 0 0 var(--accent);
}

.avatar-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.thread-row[aria-current="true"] .avatar-circle {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.inbox-reader-col {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  background: var(--bg-subtle);
}

.reader-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.reader-messages {
  padding: 20px 24px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.email-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 18px 20px;
}

.email-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.email-card-body {
  white-space: pre-wrap;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink);
}

/* AI Draft Ready Composer Box */
.ai-draft-dock {
  margin: 4px 24px 24px;
  background: var(--bg);
  border: 1.5px solid var(--accent);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(217, 35, 46, 0.08);
}

.ai-draft-head {
  background: var(--accent-tint);
  border-bottom: 1px solid var(--accent-border);
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.tone-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tone-pill {
  min-height: 32px;
  padding: 0 10px;
  border-radius: 5px;
  border: 1px solid var(--border-input);
  background: var(--bg);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

.tone-pill[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.ai-draft-editor {
  width: 100%;
  min-height: 150px;
  border: 0;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  resize: vertical;
  outline: none;
}

.ai-draft-foot {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

/* Standard Dashboard Page Content (`/app/ai`, `/app/billing`, `/app/settings`) */
.dashboard-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
  background: var(--bg-subtle);
}

.dashboard-container {
  max-width: 980px;
  margin: 0 auto;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px;
  margin-bottom: 20px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th, .table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table th {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-secondary);
  background: var(--bg-subtle);
}

/* Native Modal */
.modal-dialog {
  width: min(600px, 94vw);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 24px 48px rgba(10, 10, 12, 0.18);
}

.modal-dialog::backdrop {
  background: rgba(10, 10, 12, 0.45);
}

/* Responsive Reflow */
@media (max-width: 1024px) {
  .visual-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .inbox-split {
    grid-template-columns: 1fr;
  }
  .inbox-split[data-mobile-pane="reading"] .inbox-list-col {
    display: none;
  }
  .inbox-split[data-mobile-pane="list"] .inbox-reader-col {
    display: none;
  }
}

@media (max-width: 768px) {
  .saas-shell {
    grid-template-columns: 1fr;
  }
  .saas-sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform 150ms ease;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  }
  .saas-sidebar[data-open="true"] {
    transform: translateX(0);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .claim-bar {
    flex-direction: column;
  }
  .dashboard-scroll {
    padding: 18px 16px;
  }
}