/* ==========================================================================
   OSD SANSTHAN — library card catalogue
   Palette: card #f2f5fd · manila #dce3f8 · oak #24455b · oak-dark #152c3b
            ink blue #453b1d · stamp red #1c6d72 · brass #85a1dc · felt #7b3e5c
   Signature: ruled index cards with red top line, tabbed dividers, oak drawers
   with brass label holders, typewriter type, rubber stamps.
   ========================================================================== */

:root {
  --card: #f2f5fd;
  --manila: #dce3f8;
  --oak: #24455b;
  --oakdark: #152c3b;
  --ink: #453b1d;
  --red: #1c6d72;
  --brass: #85a1dc;
  --felt: #7b3e5c;
  --wood: repeating-linear-gradient(90deg, rgba(0, 0, 0, .06) 0 2px, transparent 2px 9px, rgba(255, 255, 255, .04) 9px 10px, transparent 10px 23px);
}

html { scroll-behavior: smooth; }
body { background: var(--card); }

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--ink); color: var(--card); padding: 10px 16px; font-weight: 700;
}
.skip-link:focus { left: 16px; top: 16px; }
:focus-visible { outline: 3px solid var(--red); outline-offset: 3px; }

.type { font-family: "Archivo Black", "Courier New", monospace; }
.em { color: var(--red); font-style: italic; }
.on-dark .em { color: #b5caf8; }

/* Wood ------------------------------------------------------------------- */
.wood { background-color: var(--oak); background-image: var(--wood); }
.wood--dark { background-color: var(--oakdark); background-image: var(--wood); }

/* Brass plate ------------------------------------------------------------ */
.brass {
  background: linear-gradient(145deg, #bfcdf4, #85a1dc 45%, #5080dc 70%, #a4b8ea);
  color: #152c3b; border-radius: 4px; position: relative;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .35), inset 0 0 0 3px rgba(14, 55, 111, .35), 0 3px 0 rgba(0, 0, 0, .35);
}
.brass::before, .brass::after {
  content: ""; position: absolute; top: 50%; width: 6px; height: 6px; border-radius: 50%; transform: translateY(-50%);
  background: radial-gradient(circle at 35% 30%, #ffffff, #2964da 70%);
}
.brass::before { left: 7px; }
.brass::after { right: 7px; }

/* Index card ------------------------------------------------------------- */
.icard {
  position: relative; background-color: var(--card);
  background-image:
    linear-gradient(var(--red), var(--red)),
    repeating-linear-gradient(transparent 0 27px, rgba(69, 59, 29, .22) 27px 28px);
  background-size: 100% 2px, 100% 100%;
  background-position: 0 44px, 0 46px;
  background-repeat: no-repeat, no-repeat;
  box-shadow: 0 1px 0 rgba(0, 0, 0, .1), 0 12px 22px -10px rgba(21, 44, 59, .45);
  border-radius: 4px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.icard:hover { transform: translateY(-5px) rotate(var(--hover-rot, 0deg)); }
.icard::after {
  content: ""; position: absolute; left: 50%; bottom: 12px; width: 14px; height: 14px; margin-left: -7px;
  border-radius: 50%; background: var(--oak); box-shadow: inset 0 2px 3px rgba(0, 0, 0, .55);
  opacity: .8;
}
.tab {
  position: absolute; left: 22px; top: -26px; padding: 6px 16px 8px;
  background: var(--manila); border-radius: 8px 8px 0 0; font-family: "Archivo Black", monospace;
  font-size: 15px; color: var(--red); box-shadow: 0 -2px 0 rgba(0, 0, 0, .08);
}
.tag { display: inline-block; font-family: "Archivo Black", monospace; font-size: 12.5px; padding: 2px 9px; border: 1.5px solid var(--ink); color: var(--ink); border-radius: 2px; }

/* Drawer (hero) ---------------------------------------------------------- */
.drawer {
  position: relative; border-radius: 6px; padding: 22px 22px 28px;
  background-color: var(--oak); background-image: var(--wood);
  box-shadow: inset 0 0 0 5px rgba(0, 0, 0, .18), inset 0 0 0 7px rgba(255, 255, 255, .07), 0 22px 30px -12px rgba(21, 44, 59, .6);
}
.knob { width: 34px; height: 34px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #d3ddfa, #6c91dd 70%); box-shadow: 0 4px 0 rgba(0, 0, 0, .35); margin: 0 auto; }

/* Book cover ------------------------------------------------------------- */
.book {
  position: relative; border-radius: 4px 14px 14px 4px; padding: 46px 28px 34px 40px;
  color: #e1e7fb; box-shadow: 0 16px 24px -12px rgba(0, 0, 0, .6), inset 10px 0 0 rgba(0, 0, 0, .22);
}
.book::before { content: ""; position: absolute; inset: 14px 14px 14px 26px; border: 2px solid rgba(181, 202, 248, .7); border-radius: 2px; pointer-events: none; }
.book::after { content: ""; position: absolute; inset: 20px 20px 20px 32px; border: 1px solid rgba(181, 202, 248, .4); pointer-events: none; }

/* Stamp ------------------------------------------------------------------ */
.rubber {
  display: inline-block; font-family: "Archivo Black", monospace; text-transform: uppercase; letter-spacing: .14em;
  font-size: 12px; color: var(--red); border: 3px double var(--red); padding: 4px 10px; border-radius: 4px;
  transform: rotate(-9deg); opacity: .85;
}

/* Buttons ---------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; font-weight: 600; font-size: 15.5px; cursor: pointer; border-radius: 3px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn--red { background: var(--red); color: var(--card); box-shadow: 0 4px 0 #114a4d; }
.btn--red:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #114a4d; }
.btn--red:active { transform: translateY(3px); box-shadow: 0 1px 0 #114a4d; }
.btn--line { background: transparent; color: var(--ink); border: 2px solid var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--card); }
.btn--sm { padding: 9px 18px; font-size: 14.5px; box-shadow: 0 3px 0 #114a4d; }
.btn__arrow { transition: transform .2s ease; }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* Nav -------------------------------------------------------------------- */
.nl { position: relative; font-family: "Archivo Black", monospace; font-size: 16px; padding: 6px 2px; color: var(--card); }
.nl::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: #b5caf8; transform: scaleX(0); transform-origin: left; transition: transform .22s ease; }
.nl:hover::after { transform: scaleX(1); }

/* Reveal ----------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; transition-delay: var(--reveal-delay, 0ms); }
.reveal.is-visible { opacity: 1; transform: none; }

/* FAQ -------------------------------------------------------------------- */
.faq-item { background: var(--card); border-left: 10px solid var(--brass); box-shadow: 0 8px 16px -10px rgba(21, 44, 59, .45); border-radius: 3px; }
.faq-trigger { display: flex; width: 100%; align-items: center; gap: 16px; text-align: left; padding: 18px 20px; cursor: pointer; }
.faq-body { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item[data-state="open"] .faq-body { max-height: 24rem; }
.faq-item[data-state="open"] { background: #f4f6ff; border-left-color: var(--red); }
.faq-mark { position: relative; flex: none; margin-left: auto; width: 30px; height: 30px; border: 2px solid var(--ink); border-radius: 3px; }
.faq-mark::before, .faq-mark::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2.5px; background: var(--ink); transform: translate(-50%, -50%); }
.faq-mark::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .25s ease; }
.faq-item[data-state="open"] .faq-mark { background: var(--red); border-color: var(--red); }
.faq-item[data-state="open"] .faq-mark::before, .faq-item[data-state="open"] .faq-mark::after { background: var(--card); }
.faq-item[data-state="open"] .faq-mark::after { transform: translate(-50%, -50%) rotate(0deg); }

/* Form ------------------------------------------------------------------- */
.lbl { display: block; font-family: "Archivo Black", monospace; font-size: 14px; letter-spacing: .06em; color: var(--red); margin-bottom: 4px; }
.field {
  width: 100%; background: rgba(255, 255, 255, .35); border: 0; border-bottom: 2px solid rgba(69, 59, 29, .55);
  padding: 9px 4px; font-size: 16px; color: var(--ink); border-radius: 0; font-family: "Archivo Black", monospace;
  transition: background .2s ease, border-color .2s ease;
}
.field:focus { outline: none; background: rgba(181, 202, 248, .25); border-bottom-color: var(--red); }
select.field { appearance: none; -webkit-appearance: none; cursor: pointer; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(-45deg, transparent 50%, var(--ink) 50%); background-position: calc(100% - 16px) 52%, calc(100% - 9px) 52%; background-size: 7px 7px; background-repeat: no-repeat; }

/* Toast ------------------------------------------------------------------ */
.toast {
  position: fixed; left: 50%; bottom: 26px; z-index: 90;
  transform: translate(-50%, 24px); opacity: 0; pointer-events: none;
  background: var(--oakdark); color: var(--card); border-left: 6px solid var(--brass);
  padding: 14px 20px; font-family: "Archivo Black", monospace; font-size: 15px; max-width: calc(100vw - 32px);
  transition: transform .3s ease, opacity .3s ease;
}
.toast.is-shown { transform: translate(-50%, 0); opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .icard { transition: none !important; }
  html { scroll-behavior: auto; }
}

.no-hole::after { display: none; }