/* AeroBook visual polish — NASA-aligned brand language without using
 * NASA's protected insignia/wordmark.
 *
 * Per NASA Brand Guidelines (https://www.nasa.gov/nasa-brand-center/):
 *   - NASA fonts: Inter (display), Public Sans (body), DM Mono (mono)
 *   - NASA Blue: #0078D4
 *   - NASA imagery: permitted for educational/informational use
 *   - NASA insignia/wordmark: NOT permitted as branding for non-NASA work
 *
 * We use NASA's color palette and fonts (public guidelines) plus public
 * domain NASA aero photography (educational use), but all branding is
 * the AeroBook wordmark — never the NASA meatball or worm.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Public+Sans:wght@400;500;600;700&family=DM+Mono:wght@400;500&family=IBM+Plex+Serif:wght@400;500;600;700&display=swap');

:root {
  --aero-bg-deep: #050810;
  --aero-bg-panel: #0E1421;
  --aero-bg-elevated: #161E2F;
  --aero-border: #1F2A42;
  --aero-text-primary: #F4F6FB;
  --aero-text-secondary: #8B95AB;
  --aero-text-muted: #5A6478;

  /* NASA brand palette */
  --nasa-blue: #0078D4;
  --nasa-blue-light: #2E9BFF;
  --nasa-blue-dark: #005A9E;
  --nasa-red: #FC3D21;

  /* Accents derived from NASA blue */
  --aero-accent: #2E9BFF;
  --aero-accent-glow: rgba(46, 155, 255, 0.18);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Typography (NASA digital font stack)
 * ───────────────────────────────────────────────────────────────────────── */

html, body, #root {
  font-family: 'Public Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  letter-spacing: -0.005em;
  background: var(--aero-bg-deep) !important;
  color: var(--aero-text-primary) !important;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif !important;
  letter-spacing: -0.015em;
  color: var(--aero-text-primary);
  font-weight: 700;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.5rem; font-weight: 600; }
h3 { font-size: 1.125rem; font-weight: 600; }

code, pre, .code, .number {
  font-family: 'DM Mono', 'IBM Plex Mono', 'JetBrains Mono', Menlo, monospace;
  font-size: 0.9em;
}

/* ─────────────────────────────────────────────────────────────────────────
 * Login page — first impression for NASA stakeholders
 * Hero photo behind a glassmorphism login card.
 * ───────────────────────────────────────────────────────────────────────── */

.MuiContainer-root,
[class*="login"], [class*="Login"] {
  position: relative;
}

body:has(form[action*="login"])::before,
.MuiContainer-root:has(form)::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(5, 8, 16, 0.85) 0%, rgba(5, 8, 16, 0.6) 50%, rgba(0, 120, 212, 0.35) 100%),
    url('/public/images/x-15-hero-v6.jpg');
  background-size: cover;
  background-position: center;
  z-index: -1;
}

.MuiContainer-root form {
  background: rgba(14, 20, 33, 0.85) !important;
  backdrop-filter: blur(20px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(20px) saturate(180%) !important;
  border: 1px solid rgba(46, 155, 255, 0.2) !important;
  border-radius: 16px !important;
  padding: 2.5rem !important;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.6),
    0 0 80px rgba(0, 120, 212, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.05) !important;
  max-width: 420px !important;
}

.MuiInputBase-root {
  background: rgba(22, 30, 47, 0.6) !important;
  border-radius: 8px !important;
  font-family: 'Public Sans', sans-serif !important;
}

.MuiInputBase-input {
  color: var(--aero-text-primary) !important;
}

.MuiOutlinedInput-notchedOutline {
  border-color: var(--aero-border) !important;
}

.MuiOutlinedInput-root:hover .MuiOutlinedInput-notchedOutline {
  border-color: var(--nasa-blue) !important;
}

.MuiOutlinedInput-root.Mui-focused .MuiOutlinedInput-notchedOutline {
  border-color: var(--nasa-blue-light) !important;
  border-width: 1px !important;
}

.MuiFormLabel-root {
  color: var(--aero-text-secondary) !important;
  font-family: 'Public Sans', sans-serif !important;
}

.MuiButton-contained {
  background: linear-gradient(135deg, var(--nasa-blue) 0%, var(--nasa-blue-dark) 100%) !important;
  color: #FFFFFF !important;
  font-weight: 600 !important;
  text-transform: none !important;
  font-family: 'Inter', sans-serif !important;
  letter-spacing: 0.01em !important;
  box-shadow: 0 4px 14px rgba(0, 120, 212, 0.35) !important;
  border-radius: 8px !important;
  padding: 0.75rem 1.5rem !important;
}

.MuiButton-contained:hover {
  background: linear-gradient(135deg, var(--nasa-blue-light) 0%, var(--nasa-blue) 100%) !important;
  box-shadow: 0 6px 20px rgba(0, 120, 212, 0.5) !important;
  transform: translateY(-1px);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Header / sidebar
 * ───────────────────────────────────────────────────────────────────────── */

header, [class*="header"] {
  background: rgba(5, 8, 16, 0.75) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--aero-border) !important;
}

[class*="sidebar"], aside {
  background: var(--aero-bg-panel) !important;
  border-right: 1px solid var(--aero-border) !important;
}

/* ─────────────────────────────────────────────────────────────────────────
 * Welcome screen — hero image background + book cover grid
 * ───────────────────────────────────────────────────────────────────────── */

#root {
  position: relative;
  overflow-x: hidden;
}

#root::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 75vh;
  background-image:
    linear-gradient(180deg,
      rgba(5, 8, 16, 0.0) 0%,
      rgba(5, 8, 16, 0.0) 35%,
      rgba(5, 8, 16, 0.55) 75%,
      var(--aero-bg-deep) 100%),
    url('/public/images/x-15-hero-v6.jpg');
  background-size: cover;
  background-position: center 30%;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
}

#root::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(46, 155, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 155, 255, 0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 1;
}

main, [class*="main"], [class*="chat"] {
  position: relative;
  z-index: 2;
}

/* Override the duplicate #root::after definition above —
   moved to body::after to make room for the grid pattern */

/* ─────────────────────────────────────────────────────────────────────────
 * Chat messages
 * ───────────────────────────────────────────────────────────────────────── */

.message-container, [class*="MessageContainer"] {
  padding: 1.25rem 0;
}

[class*="assistant-message"], [class*="AssistantMessage"] {
  background: rgba(14, 20, 33, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--aero-border);
  border-left: 3px solid var(--nasa-blue);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

/* Inline citation chips [1], [2] */
a[href*="source"], .markdown-body a[href^="#"] {
  display: inline-block;
  padding: 0.05em 0.45em;
  margin: 0 0.1em;
  background: var(--aero-accent-glow);
  color: var(--aero-accent) !important;
  border-radius: 4px;
  font-size: 0.78em;
  font-weight: 600;
  text-decoration: none !important;
  vertical-align: super;
  line-height: 1;
  border: 1px solid rgba(46, 155, 255, 0.3);
  transition: all 0.15s ease;
  font-family: 'DM Mono', monospace;
}

a[href*="source"]:hover, .markdown-body a[href^="#"]:hover {
  background: var(--nasa-blue);
  color: #FFFFFF !important;
  border-color: var(--nasa-blue-light);
  transform: translateY(-1px);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Side panel citations
 * ───────────────────────────────────────────────────────────────────────── */

[class*="ElementSideView"], [class*="element-side"] {
  background: var(--aero-bg-panel) !important;
  border-left: 1px solid var(--aero-border) !important;
}

[class*="ElementSideView"] h2,
[class*="ElementSideView"] h3 {
  font-family: 'Inter', sans-serif !important;
  color: var(--aero-accent) !important;
  font-size: 0.95rem !important;
  font-weight: 600 !important;
}

/* ─────────────────────────────────────────────────────────────────────────
 * Action buttons (starters / followups)
 * Need to be highly readable against the hero photo background.
 * Aggressive selector list because Chainlit's class names vary by build.
 * ───────────────────────────────────────────────────────────────────────── */

button[class*="action"],
button[class*="Action"],
[class*="Action"] button,
[id*="action"] button,
[data-testid*="action"],
.cl-action,
button.cl-action,
.MuiButton-root[id*="action"],
button[id^="starter"],
button[id^="followup"] {
  background: rgba(5, 8, 16, 0.92) !important;
  backdrop-filter: blur(12px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(12px) saturate(180%) !important;
  border: 1.5px solid var(--nasa-blue) !important;
  color: #FFFFFF !important;
  border-radius: 999px !important;
  padding: 0.65rem 1.25rem !important;
  font-family: 'Public Sans', 'Inter', sans-serif !important;
  font-size: 0.9rem !important;
  font-weight: 600 !important;
  text-transform: none !important;
  transition: all 0.18s ease !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(46, 155, 255, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  letter-spacing: 0.01em;
}

button[class*="action"] *,
button[class*="Action"] *,
[class*="Action"] button *,
button[id^="starter"] *,
button[id^="followup"] * {
  color: #FFFFFF !important;
  font-weight: 600 !important;
}

button[class*="action"]:hover,
button[class*="Action"]:hover,
[class*="Action"] button:hover,
button[id^="starter"]:hover,
button[id^="followup"]:hover {
  border-color: var(--nasa-blue-light) !important;
  background: rgba(0, 120, 212, 0.85) !important;
  color: #FFFFFF !important;
  transform: translateY(-2px);
  box-shadow:
    0 8px 24px rgba(0, 120, 212, 0.45),
    0 0 0 1px var(--nasa-blue-light);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Input area
 * ───────────────────────────────────────────────────────────────────────── */

[class*="input-container"], .MuiInputBase-root.input-area {
  background: rgba(14, 20, 33, 0.85) !important;
  backdrop-filter: blur(12px);
  border: 1px solid var(--aero-border) !important;
  border-radius: 12px !important;
  transition: border-color 0.15s ease;
}

[class*="input-container"]:focus-within {
  border-color: var(--nasa-blue) !important;
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.15);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Image embeds in messages — used for the welcome book grid
 * ───────────────────────────────────────────────────────────────────────── */

img.book-cover {
  border-radius: 4px;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(46, 155, 255, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

img.book-cover:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 20px rgba(0, 0, 0, 0.5),
    0 0 0 1px var(--nasa-blue);
}

/* ─────────────────────────────────────────────────────────────────────────
 * Hide Chainlit watermark
 * ───────────────────────────────────────────────────────────────────────── */

[class*="watermark"], .watermark {
  display: none !important;
}

/* ─────────────────────────────────────────────────────────────────────────
 * NASA attribution mark — fixed bottom-right corner
 *
 * Per NASA brand guidelines, the meatball cannot be used as a "branding
 * device" for non-NASA work. We use it here as an ATTRIBUTION mark,
 * paired with descriptive text, exactly as educational materials cite
 * NASA imagery. AeroBook wordmark stays our own.
 * ───────────────────────────────────────────────────────────────────────── */

body::after {
  content: 'Built on NASA ARMD public-domain content';
  position: fixed;
  bottom: 16px;
  right: 24px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 8px 48px;
  background: rgba(14, 20, 33, 0.9);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(46, 155, 255, 0.25);
  border-radius: 999px;
  font-family: 'Public Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--aero-text-secondary);
  letter-spacing: 0.02em;
  background-image: url('/public/images/nasa-meatball.svg');
  background-repeat: no-repeat;
  background-position: 12px center;
  background-size: 28px 24px;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

@media (max-width: 720px) {
  body::after {
    bottom: 12px;
    right: 12px;
    font-size: 0.65rem;
    padding: 6px 12px 6px 42px;
    background-size: 24px 20px;
    background-position: 10px center;
  }
}

/* ─────────────────────────────────────────────────────────────────────────
 * Scrollbars
 * ───────────────────────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--aero-bg-deep); }
::-webkit-scrollbar-thumb { background: var(--aero-border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--nasa-blue); }

/* ─────────────────────────────────────────────────────────────────────────
 * Spinners
 * ───────────────────────────────────────────────────────────────────────── */

.MuiCircularProgress-circle, [class*="spinner"] {
  color: var(--nasa-blue) !important;
  stroke: var(--nasa-blue) !important;
}