/* =========================================================================
   SyllaZip — Academia / Classical Design System
   Global tokens, fonts, textures, vignette, flourishes, dividers, arch-tops.
   ========================================================================= */

/* Google Fonts — Cormorant Garamond (headings), Crimson Pro (body), Cinzel (display/labels) */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=Crimson+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=Cinzel:wght@400;500;600;700&display=swap');

/* ----------------------- Design Tokens ----------------------- */
:root {
  /* Foundation */
  --bg-mahogany:      #1C1714; /* deep mahogany — page background */
  --bg-aged-oak:      #251E19; /* aged oak — card/panel surface */
  --bg-aged-oak-50:   rgba(37, 30, 25, 0.50);
  --bg-aged-oak-30:   rgba(37, 30, 25, 0.30);
  --fg-parchment:     #E8DFD4; /* antique parchment — primary text */
  --muted-leather:    #3D332B; /* worn leather — tertiary backgrounds */
  --muted-ink:        #9C8B7A; /* faded ink — secondary text, labels */
  --border-wood:      #4A3F35; /* wood grain — borders, dividers */
  --border-wood-50:   rgba(74, 63, 53, 0.50);

  /* Accents */
  --brass:            #C9A962; /* polished brass — primary interactive */
  --brass-hi:         #D4B872; /* brass highlight (top of gradient) */
  --brass-lo:         #B8953F; /* brass shadow (bottom of gradient) */
  --brass-deep:       #A6863A; /* deep brass */
  --brass-glow:       rgba(201, 169, 98, 0.30);
  --crimson:          #8B2635; /* library crimson — emphasis */
  --crimson-deep:     #5A1822; /* crimson shadow */
  --crimson-fg:       #E8DFD4; /* parchment on crimson */

  /* Fonts */
  --font-heading: "Cormorant Garamond", "Crimson Pro", Georgia, serif;
  --font-body:    "Crimson Pro", "Cormorant Garamond", Georgia, serif;
  --font-display: "Cinzel", "Cormorant Garamond", Georgia, serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Radii */
  --radius-default: 4px;
  --radius-arch-top: 40% 40% 0 0 / 20% 20% 0 0;

  /* Shadows */
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.30);
  --shadow-emboss:
    inset 0 1px 0 rgba(255, 255, 255, 0.20),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20),
    0 2px 8px rgba(0, 0, 0, 0.30);
  --shadow-emboss-hover:
    inset 0 1px 0 rgba(255, 255, 255, 0.20),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20),
    0 4px 12px rgba(201, 169, 98, 0.30);
  --shadow-wax-seal:
    inset 0 2px 4px rgba(255, 255, 255, 0.20),
    inset 0 -2px 4px rgba(0, 0, 0, 0.30),
    0 4px 8px rgba(0, 0, 0, 0.40);

  /* Brass button gradient */
  --gradient-brass: linear-gradient(180deg, #D4B872 0%, #C9A962 50%, #B8953F 100%);

  /* Spacing */
  --space-section-y: 4rem;
  --space-block: 1.5rem;
}

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

html, body {
  margin: 0;
  padding: 1rem;
  background-color: var(--bg-mahogany);
  color: var(--fg-parchment);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.625;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Page main fills available height; footer drops to bottom on short pages */
main {
  flex: 1 0 auto;
  width: 100%;
}
footer {
  flex-shrink: 0;
}

/* ----------------------- Atmospheric Overlays ----------------------- */
/* Aged paper grain — fractal noise, very subtle, fixed over viewport */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.03;
  mix-blend-mode: overlay;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='7'/><feColorMatrix type='matrix' values='0 0 0 0 0.92  0 0 0 0 0.87  0 0 0 0 0.78  0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* Vignette — radial darkening from center outward, fixed overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(ellipse at center,
    transparent 0%,
    transparent 50%,
    rgba(28, 23, 20, 0.40) 100%);
}

/* Make sure interactive elements still receive clicks */
header, main, footer { position: relative; z-index: 3; }

/* ----------------------- Typography ----------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--fg-parchment);
  margin: 0;
  line-height: 1.15;
}

p { margin: 0 0 1em 0; }

a {
  color: var(--brass);
  text-decoration: none;
  transition: color 200ms ease-out, letter-spacing 200ms ease-out;
}
a:hover {
  color: var(--brass-hi);
  letter-spacing: 0.02em;
  text-decoration: underline;
  text-underline-offset: 4px;
}

::selection {
  background: var(--brass);
  color: var(--bg-mahogany);
}

/* ----------------------- Signature Patterns ----------------------- */

/* Arch-top border radius — cathedral window / library alcove */
.arch-top {
  border-radius: var(--radius-arch-top);
  overflow: hidden;
}

/* Ornate corner frame — large brass L-brackets on the major frames */
.ornate-frame {
  position: relative;
}
.ornate-frame::before,
.ornate-frame::after {
  content: "";
  position: absolute;
  width: 40px;
  height: 40px;
  border: 2px solid var(--brass);
  pointer-events: none;
  transition: opacity 300ms ease-out;
}
.ornate-frame::before {
  top: -1px;
  left: -1px;
  border-right: none;
  border-bottom: none;
}
.ornate-frame::after {
  bottom: -1px;
  right: -1px;
  border-left: none;
  border-top: none;
}

/* Subtle corner flourishes for cards (24px brackets) */
.corner-flourish {
  position: relative;
}
.corner-flourish::before,
.corner-flourish::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1px solid var(--brass);
  opacity: 0.6;
  transition: opacity 300ms ease-out;
  pointer-events: none;
}
.corner-flourish::before {
  top: 6px;
  left: 6px;
  border-right: none;
  border-bottom: none;
}
.corner-flourish::after {
  bottom: 6px;
  right: 6px;
  border-left: none;
  border-top: none;
}
.corner-flourish:hover::before,
.corner-flourish:hover::after,
.ornate-frame:hover::before,
.ornate-frame:hover::after {
  opacity: 1;
}

/* Ornate divider — gradient line + centered glyph */
.ornate-divider {
  position: relative;
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--border-wood) 20%,
    var(--brass) 50%,
    var(--border-wood) 80%,
    transparent 100%);
  margin: 1.5rem 0;
  border: none;
}
.ornate-divider::before {
  content: "\2726"; /* heavy four-pointed star, can be overridden */
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  color: var(--brass);
  font-size: 14px;
  background: var(--bg-mahogany);
  padding: 0 14px;
  line-height: 1;
}
/* Variant glyphs the page may opt into via data-glyph attribute */
.ornate-divider[data-glyph="leaf"]::before   { content: "\2767"; } /* ❧ */
.ornate-divider[data-glyph="flower"]::before { content: "\2766"; } /* ❦ */
.ornate-divider[data-glyph="star"]::before   { content: "\2736"; } /* ✶ */
.ornate-divider[data-glyph="diamond"]::before{ content: "\2724"; } /* ✤ */

/* Volume label — Cinzel, uppercase, brass, wide tracking */
.volume-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--brass);
  margin: 0 0 0.5rem 0;
}

/* Section title (Cormorant Garamond, large) */
.section-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--fg-parchment);
  letter-spacing: 0.005em;
  margin: 0 0 0.75rem 0;
}

/* Subtitle / description under a section title */
.section-subtitle {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--muted-ink);
  font-style: italic;
  margin: 0 0 0.5rem 0;
}

/* Drop cap — Cinzel, brass, engraved shadow */
.drop-cap::first-letter {
  font-family: var(--font-display);
  font-size: 4.5rem;
  float: left;
  margin: 0.05em 0.5rem 0 0;
  line-height: 0.8;
  color: var(--brass);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.30),
              -1px -1px 1px rgba(255, 255, 255, 0.10);
}

/* Engraved text effect — pressed-into-metal */
.engraved {
  text-shadow:
    1px 1px 1px rgba(0, 0, 0, 0.40),
    -1px -1px 1px rgba(255, 255, 255, 0.10);
}

/* Monospace utility (hex dump, base64, console, word table) */
.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0;
}

/* ----------------------- Layout helpers ----------------------- */
.container-wide {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}
@media (min-width: 640px) { .container-wide { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .container-wide { padding: 0 2rem; } }

.container-narrow {
  max-width: 896px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Section rhythm */
.section {
  padding: 1.5rem 0;
}
@media (min-width: 768px) {
  .section { padding: 2rem 0; }
}

/* Responsive grid — 2-column on lg, stack on mobile */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 1024px) {
  .grid-2 {
    grid-template-columns: 2fr 1fr;
  }
}

/* Wax-seal badge (used sparingly for "new" / "featured" items) */
.wax-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #B5344A 0%, var(--crimson) 45%, var(--crimson-deep) 100%);
  color: var(--crimson-fg);
  font-family: var(--font-display);
  font-size: 0.7rem;
  box-shadow: var(--shadow-wax-seal);
  position: absolute;
  top: -12px;
  right: 24px;
}

/* Sepia-to-color transition for arch-top images */
.sepia-reveal {
  filter: sepia(0.6) contrast(0.95) brightness(0.9);
  transition: filter 700ms ease-out, transform 700ms ease-out;
}
.sepia-reveal:hover {
  filter: sepia(0) contrast(1) brightness(1);
  transform: scale(1.05);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus ring — brass, with mahogany offset for accessibility */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--bg-mahogany), 0 0 0 4px var(--brass);
  border-radius: var(--radius-default);
}

/* Scrollbar — slim, mahogany/oak themed */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-mahogany);
}
::-webkit-scrollbar-thumb {
  background: var(--border-wood);
  border-radius: 4px;
  border: 2px solid var(--bg-mahogany);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brass-lo);
}

/* ----------------------- Header (sticky, sticky-to-top) ----------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(28, 23, 20, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-wood);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}
.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.site-header__logo {
  width: 48px;
  height: 56px; /* arch-top ratio */
  flex-shrink: 0;
  transition: transform 300ms ease-out;
}
.site-header__logo:hover {
  transform: scale(1.05);
}
.site-header__title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg-parchment);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.site-header__title .ver {
  font-family: var(--font-display);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--brass);
  padding: 2px 6px;
  border: 1px solid var(--brass);
  border-radius: var(--radius-default);
  background: rgba(201, 169, 98, 0.08);
}
.site-header__subtitle {
  font-family: var(--font-body);
  font-size: 1.0rem;
  color: var(--muted-ink);
  font-style: italic;
  margin: 0;
  line-height: 1.35;
}
@media (max-width: 640px) {
  .site-header__subtitle { display: none; }
  .site-header__title { font-size: 1.15rem; }
}

/* ----------------------- Footer (sticky to bottom) ----------------------- */
.site-footer {
  border-top: 1px solid var(--border-wood);
  background: rgba(28, 23, 20, 0.95);
  margin-top: auto;
}
.site-footer__inner {
  padding: 0.85rem 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-ink);
}
.site-footer__inner p {
  margin: 0;
  line-height: 1.6;
}
.site-footer__inner .accent { color: var(--brass); }

/* ----------------------- Loading progress card ----------------------- */
.loading-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
}
.loading-card .spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border-wood);
  border-top-color: var(--brass);
  border-right-color: var(--brass);
  border-radius: 50%;
  animation: academia-spin 1.1s linear infinite;
  flex-shrink: 0;
}
@keyframes academia-spin {
  to { transform: rotate(360deg); }
}
.loading-card .spinner-label {
  font-family: var(--font-body);
  color: var(--fg-parchment);
  font-size: 0.95rem;
}
.loading-card .spinner-sub {
  font-family: var(--font-body);
  color: var(--muted-ink);
  font-size: 0.82rem;
  font-style: italic;
  margin-top: 0.25rem;
}