@import "tailwindcss";

@theme {
  --color-ink: #cbd5e1;
  --color-ink-bright: #e2e8f0;
  --color-ink-dim: #94a3b8;
  --color-paper: #0f172a;
  --color-paper-raised: #1e293b;
  --color-paper-dim: #141c27;
  --color-accent: #3b82f6;
  --color-accent-light: #8b5cf6;
  --color-muted: #7a8a9e;
  --color-border: #334155;
  --color-border-light: #3f4f63;
  --font-serif: "Iowan Old Style", "Palatino Linotype", "URW Palladio L", P052, serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

/* Default: dark navy with blue-purple accents (ATAuth style) */
/* Uses the @theme defaults above */

/* Theme: Parchment — warm aged paper */
[data-theme="parchment"] {
  --color-ink: #3d3329;
  --color-ink-bright: #1a1410;
  --color-ink-dim: #6b5d4f;
  --color-paper: #d9ccb4;
  --color-paper-raised: #cfc1a7;
  --color-paper-dim: #d3c5ab;
  --color-accent: #7a3b10;
  --color-accent-light: #904d22;
  --color-muted: #5e4f3d;
  --color-border: #bfb196;
  --color-border-light: #c9bca3;
}

/* Theme: Moss — earthy green tones */
[data-theme="moss"] {
  --color-ink: #2d3a2e;
  --color-ink-bright: #1a241b;
  --color-ink-dim: #4d5e4f;
  --color-paper: #dde6d5;
  --color-paper-raised: #d0dbc7;
  --color-paper-dim: #d5dfcc;
  --color-accent: #3d6b35;
  --color-accent-light: #4a8040;
  --color-muted: #4d5e4f;
  --color-border: #b8c9ad;
  --color-border-light: #c4d3b9;
}

/* Theme: Slate — cool minimal gray */
[data-theme="slate"] {
  --color-ink: #37404a;
  --color-ink-bright: #1a2029;
  --color-ink-dim: #5a6674;
  --color-paper: #eef0f3;
  --color-paper-raised: #e2e5ea;
  --color-paper-dim: #e8eaee;
  --color-accent: #4a6fa5;
  --color-accent-light: #5b82b8;
  --color-muted: #5a6674;
  --color-border: #d0d5dc;
  --color-border-light: #dae0e6;
}

/* Theme: Rose — warm blush tones */
[data-theme="rose"] {
  --color-ink: #3d2d33;
  --color-ink-bright: #1f1418;
  --color-ink-dim: #6b5058;
  --color-paper: #f0e2e4;
  --color-paper-raised: #e6d5d8;
  --color-paper-dim: #ebdadd;
  --color-accent: #a04258;
  --color-accent-light: #b85570;
  --color-muted: #6b5058;
  --color-border: #d4bfc4;
  --color-border-light: #dec9ce;
}

/* Theme: E-Ink — color e-ink display */
[data-theme="eink"] {
  --color-ink: #2d2b28;
  --color-ink-bright: #1a1918;
  --color-ink-dim: #5c5955;
  --color-paper: #e5e1dc;
  --color-paper-raised: #dbd7d1;
  --color-paper-dim: #dfdbd5;
  --color-accent: #4a7a6e;
  --color-accent-light: #5c8e82;
  --color-muted: #605c57;
  --color-border: #c9c4bd;
  --color-border-light: #d3cec7;
}

/* Text selection — theme-matched highlight */
::selection {
  background: color-mix(in srgb, var(--color-accent) 25%, transparent);
  color: var(--color-ink-bright);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

/* Default body gradient — subtle blue/purple ambient glow */
body {
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
}

[data-theme="parchment"] body {
  background-image:
    radial-gradient(ellipse at 25% 15%, rgba(240, 225, 180, 0.7) 0%, transparent 30%),
    radial-gradient(ellipse at 70% 5%, rgba(235, 218, 170, 0.5) 0%, transparent 25%),
    radial-gradient(ellipse at 60% 50%, rgba(200, 165, 100, 0.35) 0%, transparent 35%),
    radial-gradient(ellipse at 10% 70%, rgba(120, 105, 80, 0.3) 0%, transparent 30%),
    radial-gradient(ellipse at 85% 80%, rgba(130, 112, 85, 0.25) 0%, transparent 28%),
    radial-gradient(ellipse at 45% 90%, rgba(115, 100, 75, 0.2) 0%, transparent 35%),
    radial-gradient(circle at 15% 50%, rgba(90, 75, 55, 0.2) 0%, transparent 20%),
    radial-gradient(circle at 80% 35%, rgba(95, 80, 58, 0.15) 0%, transparent 18%),
    radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(100, 85, 60, 0.4) 100%);
}

[data-theme="moss"] body {
  background-image:
    radial-gradient(ellipse at 25% 15%, rgba(200, 220, 180, 0.5) 0%, transparent 30%),
    radial-gradient(ellipse at 70% 5%, rgba(190, 210, 170, 0.4) 0%, transparent 25%),
    radial-gradient(ellipse at 60% 50%, rgba(150, 180, 120, 0.25) 0%, transparent 35%),
    radial-gradient(ellipse at 10% 70%, rgba(80, 100, 60, 0.25) 0%, transparent 30%),
    radial-gradient(ellipse at 85% 80%, rgba(90, 110, 70, 0.2) 0%, transparent 28%),
    radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(70, 90, 50, 0.3) 100%);
}

[data-theme="slate"] body {
  background-image:
    radial-gradient(ellipse at 25% 15%, rgba(220, 225, 235, 0.6) 0%, transparent 30%),
    radial-gradient(ellipse at 70% 5%, rgba(210, 218, 230, 0.4) 0%, transparent 25%),
    radial-gradient(ellipse at 60% 50%, rgba(180, 195, 215, 0.2) 0%, transparent 35%),
    radial-gradient(ellipse at 50% 50%, transparent 40%, rgba(160, 170, 190, 0.2) 100%);
}

[data-theme="rose"] body {
  background-image:
    radial-gradient(ellipse at 25% 15%, rgba(245, 210, 215, 0.6) 0%, transparent 30%),
    radial-gradient(ellipse at 70% 5%, rgba(240, 200, 210, 0.4) 0%, transparent 25%),
    radial-gradient(ellipse at 60% 50%, rgba(210, 160, 175, 0.25) 0%, transparent 35%),
    radial-gradient(ellipse at 10% 70%, rgba(140, 100, 110, 0.2) 0%, transparent 30%),
    radial-gradient(ellipse at 85% 80%, rgba(150, 110, 120, 0.18) 0%, transparent 28%),
    radial-gradient(ellipse at 50% 50%, transparent 30%, rgba(120, 85, 95, 0.3) 100%);
}

[data-theme="eink"] body {
  background-image:
    radial-gradient(ellipse at 30% 20%, rgba(200, 195, 185, 0.3) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 70%, rgba(190, 185, 175, 0.2) 0%, transparent 35%);
}

/* ── E-Ink animation overrides ──
   Mimics color e-ink display behavior:
   - Full page refresh flash on load
   - Discrete stepped rendering (no smooth fades)
   - No glows, shadows, or smooth transitions
   - No backdrop blur (e-ink can't blur)
*/

@keyframes einkRefresh {
  0% { opacity: 1; }
  50% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes einkExit {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes einkFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Flash overlay on page load */
[data-theme="eink"] body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--color-ink-bright);
  z-index: 9999;
  animation: einkRefresh 0.5s steps(2) both;
  pointer-events: none;
}

/* Flash overlay on navigation (exit) */
[data-theme="eink"] body.eink-navigating::after {
  animation: einkExit 0.25s steps(2) both;
}

/* Kill all smooth transitions */
[data-theme="eink"] *,
[data-theme="eink"] *::before,
[data-theme="eink"] *::after {
  transition-duration: 0s !important;
}

/* Stepped fade-in (no slide, no ease) */
[data-theme="eink"] .fade-in {
  animation: einkFadeIn 0.3s steps(4) 0.25s both;
}

[data-theme="eink"] .fade-in-delay {
  animation: einkFadeIn 0.3s steps(4) 0.35s both;
}

/* Stepped stagger (delays follow the page flash) */
[data-theme="eink"] .stagger-in > *:nth-child(1) { animation: einkFadeIn 0.2s steps(3) 0.3s both; }
[data-theme="eink"] .stagger-in > *:nth-child(2) { animation: einkFadeIn 0.2s steps(3) 0.35s both; }
[data-theme="eink"] .stagger-in > *:nth-child(3) { animation: einkFadeIn 0.2s steps(3) 0.4s both; }
[data-theme="eink"] .stagger-in > *:nth-child(4) { animation: einkFadeIn 0.2s steps(3) 0.45s both; }
[data-theme="eink"] .stagger-in > *:nth-child(5) { animation: einkFadeIn 0.2s steps(3) 0.5s both; }
[data-theme="eink"] .stagger-in > *:nth-child(n+6) { animation: einkFadeIn 0.2s steps(3) 0.55s both; }

/* Remove glows and shadows */
[data-theme="eink"] .card-glow {
  transition: none;
}

[data-theme="eink"] .card-glow:hover {
  box-shadow: none;
  border-color: var(--color-accent);
}

[data-theme="eink"] .avatar-glow {
  box-shadow: 0 0 0 2px var(--color-paper);
}

/* About modal: instant, no blur, no slide */
[data-theme="eink"] .about-overlay {
  transition: none;
}

[data-theme="eink"] .about-backdrop {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(0, 0, 0, 0.6);
}

[data-theme="eink"] .about-panel {
  transition: none;
  transform: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

[data-theme="eink"] .about-overlay.is-open .about-panel {
  transform: none;
}

/* Login button: no hover glow or lift */
[data-theme="eink"] .login-btn:hover {
  transform: none;
  box-shadow: none;
}

[data-theme="eink"] .login-card {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Fade-in animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.4s ease-out both;
}

.fade-in-delay {
  animation: fadeIn 0.4s ease-out 0.1s both;
}

/* Staggered fade-in for post lists */
.stagger-in > *:nth-child(1) { animation: fadeIn 0.4s ease-out 0.05s both; }
.stagger-in > *:nth-child(2) { animation: fadeIn 0.4s ease-out 0.1s both; }
.stagger-in > *:nth-child(3) { animation: fadeIn 0.4s ease-out 0.15s both; }
.stagger-in > *:nth-child(4) { animation: fadeIn 0.4s ease-out 0.2s both; }
.stagger-in > *:nth-child(5) { animation: fadeIn 0.4s ease-out 0.25s both; }
.stagger-in > *:nth-child(n+6) { animation: fadeIn 0.4s ease-out 0.3s both; }


/* Gradient text utility */
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Card hover glow */
.card-glow {
  transition: border-color 0.3s, box-shadow 0.3s, background-color 0.3s;
}
.card-glow:hover {
  box-shadow: 0 0 20px color-mix(in srgb, var(--color-accent) 12%, transparent),
              0 0 40px color-mix(in srgb, var(--color-accent-light) 6%, transparent);
}

/* Avatar glow ring */
.avatar-glow {
  box-shadow: 0 0 0 2px var(--color-paper),
              0 0 12px color-mix(in srgb, var(--color-accent) 30%, transparent);
}

/* Gradient border line (header/footer) */
.border-gradient {
  border-image: linear-gradient(90deg, var(--color-border), color-mix(in srgb, var(--color-accent) 40%, var(--color-border)), color-mix(in srgb, var(--color-accent-light) 30%, var(--color-border)), var(--color-border)) 1;
}

/* Markdown content styles */
.prose h1 {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-ink-bright);
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-ink-bright);
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-ink-bright);
}

.prose p {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  color: var(--color-ink);
}

@media (min-width: 640px) {
  .prose p {
    font-size: 1.125rem;
  }
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 30%, transparent);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s;
}

.prose a:hover {
  text-decoration-color: var(--color-accent);
}

.prose blockquote {
  border-left: 2px solid var(--color-accent);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--color-ink-dim);
}

.prose ul, .prose ol {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--color-ink);
}

@media (min-width: 640px) {
  .prose ul, .prose ol {
    font-size: 1.125rem;
  }
}

.prose li {
  margin-bottom: 0.25rem;
}

.prose pre {
  background: var(--color-paper-dim);
  color: var(--color-ink);
  padding: 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.5rem 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-paper-raised);
  padding: 0.15rem 0.4rem;
  border-radius: 0.25rem;
  color: var(--color-accent);
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.prose strong {
  font-weight: 700;
  color: var(--color-ink-bright);
}

.prose em {
  font-style: italic;
}

.prose hr {
  border: none;
  margin: 2.5rem 0;
  text-align: center;
  line-height: 0;
}

.prose hr::after {
  content: "·   ·   ·";
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.15em;
  color: var(--color-muted);
}

.prose img {
  max-width: 100%;
  border-radius: 0.5rem;
  margin: 1.5rem 0;
}

/* About modal */
.about-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.about-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.about-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.about-panel {
  position: relative;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 2rem;
  max-width: 480px;
  width: calc(100% - 2rem);
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  transform: translateY(8px);
  transition: transform 0.2s ease;
}

.about-overlay.is-open .about-panel {
  transform: translateY(0);
}

/* About modal prose (rendered markdown) */
.prose-about p {
  margin-bottom: 1rem;
}

.prose-about p:last-child {
  margin-bottom: 0;
}

.prose-about a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 30%, transparent);
  transition: text-decoration-color 0.2s;
}

.prose-about a:hover {
  text-decoration-color: var(--color-accent);
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-paper);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border-radius: 0 0 0.5rem 0;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
  top: 0;
}