/* ==========================================================================
   Torna — shared motion system for tracklist menu pages
   Structural pieces: tonearm-on-scroll, pinned corner vinyl, groove
   progress bar, Lado A / Lado B 3D flip. Texture effects intentionally
   left out of this pass (see project notes).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Courier+Prime:wght@400;700&display=swap');

:root{
  --torna-orange: #f2761e;
  --torna-orange-dark: #c1541a;
  --torna-black: #111111;
  --torna-white: #ffffff;
  --torna-cream: #faf7f2;
  --groove-width: 4px;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: 'Courier Prime', 'Courier New', ui-monospace, monospace;
  background: var(--torna-white);
  color: var(--torna-black);
  overflow-x: hidden;
}

a{ color: inherit; }

/* ---------------------------------------------------------------- */
/* Top bar + back link                                               */
/* ---------------------------------------------------------------- */

.top-bar{
  width: 100%;
  height: 28px;
  background: var(--torna-black);
}

.back-home{
  display: inline-block;
  margin: 20px 0 0 24px;
  color: var(--torna-orange);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.back-home:hover{ color: var(--torna-orange-dark); }

/* ---------------------------------------------------------------- */
/* Page hero: title + tonearm rig                                    */
/* ---------------------------------------------------------------- */

.page-hero{
  position: relative;
  padding: 4vh 24px 10vh;
  text-align: center;
  overflow: visible;
}

.page-title{
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  margin: 12px 0 6px;
  letter-spacing: 0.01em;
}

.page-sub{
  margin: 0 0 6vh;
  color: #6b6b6b;
  font-size: 0.95rem;
}

.tonearm-rig{
  position: relative;
  width: min(220px, 50vw);
  height: min(220px, 50vw);
  margin: 0 auto;
}

.hero-vinyl-small{
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, var(--torna-white) 0 14%, transparent 14.5%),
    repeating-radial-gradient(circle at center, var(--torna-orange) 0 3%, var(--torna-orange-dark) 3.2% 3.6%, var(--torna-orange) 3.8% 6.5%);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  animation: spin 3.2s linear infinite;
}

.hero-vinyl-small::after{
  content: "";
  position: absolute;
  inset: 42%;
  border-radius: 50%;
  background: var(--torna-black);
}

@keyframes spin{ to{ transform: rotate(360deg); } }

/* Tonearm: pivots from top-right corner of the rig */
.tonearm{
  position: absolute;
  top: -6%;
  right: -18%;
  width: 62%;
  height: 62%;
  transform-origin: 92% 8%;
  transform: rotate(-32deg);
  transition: transform 0.05s linear;
  filter: drop-shadow(0 3px 4px rgba(0,0,0,0.2));
}

.tonearm .arm{ stroke: var(--torna-black); stroke-width: 4; stroke-linecap: round; }
.tonearm .headshell{ fill: var(--torna-black); }
.tonearm .pivot{ fill: #333; }

/* ---------------------------------------------------------------- */
/* Groove progress bar — fixed vertical line, fills with scroll      */
/* ---------------------------------------------------------------- */

.groove-progress{
  position: fixed;
  top: 0;
  left: 0;
  width: var(--groove-width);
  height: 100%;
  background: rgba(17,17,17,0.08);
  z-index: 40;
}

.groove-fill{
  width: 100%;
  height: 0%;
  background: var(--torna-orange);
}

/* ---------------------------------------------------------------- */
/* Corner pinned vinyl — low-opacity spinner while in the menu       */
/* ---------------------------------------------------------------- */

.corner-vinyl{
  position: fixed;
  top: 24px;
  right: 20px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  z-index: 30;
  background:
    radial-gradient(circle at center, var(--torna-white) 0 14%, transparent 14.5%),
    repeating-radial-gradient(circle at center, var(--torna-orange) 0 3%, var(--torna-orange-dark) 3.2% 3.6%, var(--torna-orange) 3.8% 6.5%);
  animation: spin 3.2s linear infinite;
}

.corner-vinyl::after{
  content: "";
  position: absolute;
  inset: 42%;
  border-radius: 50%;
  background: var(--torna-black);
}

.corner-vinyl.visible{ opacity: 0.16; }

.corner-vinyl.flip{
  animation: spin 3.2s linear infinite, flip 0.7s ease-in-out;
}

@keyframes flip{
  0%   { transform: rotateY(0deg) scale(1); }
  50%  { transform: rotateY(180deg) scale(1.15); }
  100% { transform: rotateY(360deg) scale(1); }
}

/* ---------------------------------------------------------------- */
/* Sides / tracklist                                                  */
/* ---------------------------------------------------------------- */

main{
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 6vh;
}

.side{
  padding: 4vh 0;
  perspective: 1200px;
}

.side-inner{
  transition: transform 0.7s ease;
  transform-style: preserve-3d;
}

.side-heading{
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 1.5rem;
  margin: 0 0 3vh;
  border-bottom: 2px solid var(--torna-black);
  padding-bottom: 10px;
}

.side-heading span{
  font-size: 0.85rem;
  color: var(--torna-orange-dark);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.category-label{
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--torna-orange);
  margin: 4vh 0 1.4vh;
}

.category-label:first-of-type{ margin-top: 1vh; }

.category-note{
  font-size: 0.8rem;
  color: #7a7a7a;
  margin: -1vh 0 1.6vh;
}

.side-divider{
  height: 1px;
}

.track{
  display: grid;
  grid-template-columns: 2.4em 1fr auto;
  align-items: start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(0,0,0,0.12);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease, background 0.2s ease;
}

.track.in-view{
  opacity: 1;
  transform: translateY(0);
}

.track:hover{
  background: rgba(242,118,30,0.05);
  animation: needle-wiggle 0.35s ease;
}

@keyframes needle-wiggle{
  0%, 100% { transform: translateX(0) translateY(0); }
  25% { transform: translateX(-2px) translateY(0); }
  50% { transform: translateX(2px) translateY(0); }
  75% { transform: translateX(-1px) translateY(0); }
}

.track-no{
  color: var(--torna-orange-dark);
  font-weight: 700;
  font-size: 0.95rem;
  padding-top: 2px;
}

.track-info{ min-width: 0; }

.track-title{
  display: block;
  font-weight: 700;
  font-size: 1.05rem;
}

.track-desc{
  display: block;
  font-size: 0.85rem;
  color: #6b6b6b;
  margin-top: 3px;
  line-height: 1.4;
}

.track-meta{
  display: block;
  font-size: 0.78rem;
  color: #9a9a9a;
  margin-top: 3px;
}

.price-chip{
  font-variant-numeric: tabular-nums;
  background: var(--torna-black);
  color: var(--torna-white);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.9rem;
  white-space: nowrap;
  align-self: center;
}

.price-chip.tiered{
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-radius: 12px;
  padding: 6px 12px;
  font-size: 0.72rem;
  text-align: right;
}

.price-chip.tiered span{ white-space: nowrap; }

/* ---------------------------------------------------------------- */
/* Footer                                                             */
/* ---------------------------------------------------------------- */

footer{
  border-top: 2px solid var(--torna-black);
  padding: 5vh 24px 8vh;
  text-align: center;
}

footer nav{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  margin-top: 2vh;
}

footer nav a{
  color: var(--torna-orange);
  text-decoration: none;
  font-size: 1rem;
}

footer nav a:hover{ color: var(--torna-orange-dark); text-decoration: underline; }

/* ---------------------------------------------------------------- */
/* Responsive                                                         */
/* ---------------------------------------------------------------- */

@media (max-width: 640px){
  .groove-progress{ width: 3px; }
  .corner-vinyl{ width: 46px; height: 46px; top: 16px; right: 12px; }
  .track{ grid-template-columns: 2em 1fr auto; gap: 10px; }
  .price-chip{ font-size: 0.8rem; padding: 4px 9px; }
}

/* ---------------------------------------------------------------- */
/* Reduced motion                                                     */
/* ---------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .hero-vinyl-small,
  .corner-vinyl{ animation: none !important; }
  .tonearm{ transition: none !important; }
  .track{
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .track:hover{ animation: none !important; }
  .side-inner{ transition: none !important; }
}