/* ============================================================
   Neo-Shamanism - 4WIDE-grammar prototype
   Dark charcoal creative-studio stage.
   ============================================================ */

:root {
  --bg: #0b0b0c;
  --bg-2: #131316;
  --ink: #ececec;
  --ink-dim: #8a8a8e;
  --ink-mute: #4a4a4f;
  --line: #26262a;
  --line-strong: #3a3a40;
  --accent: #f5f5f5;
  --hot: #c8c8c8;
  --shadow: 0 30px 80px rgba(0,0,0,0.6);
  --mono: "Inter", "Helvetica Neue", Arial, sans-serif;
  --serif: "Noto Serif JP", "Yu Mincho", serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  cursor: default;
}

button { background: none; border: none; color: inherit; font: inherit; cursor: pointer; }

/* ============================================================
   Grain texture overlay
   ============================================================ */
.grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 9000;
  opacity: 0.07;
  mix-blend-mode: overlay;
  background-image:
    radial-gradient(rgba(255,255,255,0.6) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,0.6) 1px, transparent 1px);
  background-size: 3px 3px, 5px 5px;
  background-position: 0 0, 1px 2px;
  animation: grain 1.6s steps(4) infinite;
}
@keyframes grain {
  0%   { transform: translate(0,0); }
  25%  { transform: translate(-2px,1px); }
  50%  { transform: translate(1px,-2px); }
  75%  { transform: translate(-1px,2px); }
  100% { transform: translate(0,0); }
}

/* ============================================================
   Status line (fixed top)
   ============================================================ */
.status-line {
  position: fixed; top: 0; left: 0; right: 0;
  height: 56px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 28px;
  z-index: 100;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(11,11,12,0.92), rgba(11,11,12,0.55));
  backdrop-filter: blur(8px);
}
.status-left, .status-right {
  display: flex; align-items: center; gap: 18px;
}
.status-right { justify-content: flex-end; }
.brand-mark {
  width: 14px; height: 14px;
  border: 1px solid var(--ink);
  position: relative;
}
.brand-mark::before {
  content: "";
  position: absolute; inset: 3px;
  background: var(--ink);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 0.4; transform: scale(1); }
  50%     { opacity: 1;   transform: scale(0.6); }
}
.brand-name { color: var(--ink); font-weight: 500; }
.status-coord, .status-bar { color: var(--ink-dim); }

.status-center { display: flex; gap: 8px; }
.nav-dot {
  display: flex; flex-direction: column; align-items: center;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 1px;
  transition: border-color 0.4s, color 0.4s;
  color: var(--ink-mute);
  line-height: 1;
}
.nav-dot span { font-size: 10px; font-weight: 700; }
.nav-dot em   { font-style: normal; font-size: 9px; margin-top: 4px; opacity: 0.7; }
.nav-dot.is-active { color: var(--ink); border-color: var(--line-strong); }
.nav-dot:hover { color: var(--ink); }

.focus-toggle {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  font-size: 10px;
  letter-spacing: 0.18em;
  transition: border-color 0.3s, color 0.3s;
}
.focus-toggle em { font-style: normal; }
.focus-toggle .focus-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ink-mute);
  transition: background 0.3s, box-shadow 0.3s;
}
.focus-toggle[aria-pressed="true"] {
  border-color: var(--ink);
  color: var(--ink);
}
.focus-toggle[aria-pressed="true"] .focus-dot {
  background: var(--ink);
  box-shadow: 0 0 12px rgba(255,255,255,0.65);
}

/* ============================================================
   Stage
   ============================================================ */
.stage {
  position: relative;
  width: 100vw; height: 100vh;
  padding-top: 56px;
}

.reel {
  position: relative;
  width: 100%; height: 100%;
  display: grid;
  grid-template-columns: 1fr 360px;
  grid-template-rows: 1fr auto;
  grid-template-areas:
    "visual rail"
    "title  rail";
  gap: 0;
  padding: 24px 28px 110px 28px;
}

/* ============================================================
   Center visual panel
   ============================================================ */
.visual-panel {
  grid-area: visual;
  position: relative;
  border: 1px solid var(--line-strong);
  background: #0d0d10;
  overflow: hidden;
  box-shadow: var(--shadow);
  isolation: isolate;
}
#visual-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  filter: grayscale(1) contrast(1.05);
}
.panel-frame { position: absolute; inset: 12px; pointer-events: none; }
.frame-tag {
  position: absolute;
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 4px 8px;
  border: 1px solid var(--line);
  background: rgba(11,11,12,0.55);
  backdrop-filter: blur(2px);
}
.frame-tag.tl { top: 0; left: 0; }
.frame-tag.tr { top: 0; right: 0; }
.frame-tag.bl { bottom: 0; left: 0; color: #f4b3b3; border-color: #5a2727; }
.frame-tag.br { bottom: 0; right: 0; }

.panel-meta {
  position: absolute;
  left: 24px; bottom: 24px;
  display: flex; align-items: center; gap: 14px;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  z-index: 3;
}
.meta-line {
  display: inline-block;
  width: 60px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--ink-dim));
}

/* ============================================================
   Right rail
   ============================================================ */
.rail {
  grid-area: rail;
  padding: 0 0 0 24px;
  display: flex; flex-direction: column;
  gap: 12px;
  border-left: 1px solid var(--line);
  margin-left: 24px;
}
.rail-head, .rail-foot {
  display: flex; justify-content: space-between;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 2px 4px;
}
.rail-count b { color: var(--ink); font-weight: 700; font-variant-numeric: tabular-nums; }

.rail-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.rail-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: border-color 0.4s, background 0.4s, transform 0.5s;
}
.rail-item:hover { border-color: var(--line); background: rgba(255,255,255,0.02); }
.rail-item.is-active {
  border-color: var(--ink);
  background: rgba(255,255,255,0.04);
}
.thumb {
  position: relative;
  width: 96px; height: 60px;
  overflow: hidden;
  background: #0d0d10;
  border: 1px solid var(--line);
}
.thumb-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  filter: grayscale(1) contrast(1.1);
}
.thumb-info { display: flex; flex-direction: column; justify-content: center; gap: 2px; }
.thumb-num {
  font-size: 9px; letter-spacing: 0.22em;
  color: var(--ink-mute);
  font-weight: 700;
}
.thumb-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.thumb-sub {
  font-family: var(--serif);
  font-size: 10px;
  color: var(--ink-dim);
}
.rail-item.is-active .thumb-num { color: var(--ink); }

/* ============================================================
   Copy stack (text panels)
   ============================================================ */
.copy-stack {
  position: absolute;
  top: 80px;
  right: 412px;
  width: 38%;
  max-width: 460px;
  height: calc(100% - 240px);
  pointer-events: none;
  z-index: 5;
}
.copy-panel {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(40px);
  filter: blur(20px);
  pointer-events: none;
  padding: 28px;
  background: linear-gradient(180deg, rgba(11,11,12,0.65), rgba(11,11,12,0.85));
  border: 1px solid var(--line);
  backdrop-filter: blur(4px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.copy-panel::-webkit-scrollbar { width: 4px; }
.copy-panel::-webkit-scrollbar-thumb { background: var(--line-strong); }
.copy-panel.is-active {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
  pointer-events: auto;
}
.kicker {
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.copy-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.copy-body {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.85;
  color: #cfcfd2;
}
.copy-body p { margin-bottom: 10px; }
.copy-section {
  margin-top: 14px !important;
  color: var(--ink);
  letter-spacing: 0.08em;
  font-weight: 700;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  border-left: 2px solid var(--ink);
  padding-left: 10px;
}
.copy-emphasis {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.copy-cta {
  margin-top: 22px !important;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.copy-list {
  list-style: none;
  margin: 8px 0 12px 0;
}
.copy-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 6px;
  font-family: var(--serif);
}
.copy-list li::before {
  content: "";
  position: absolute; left: 0; top: 0.8em;
  width: 10px; height: 1px;
  background: var(--ink-dim);
}
.course-card {
  position: relative;
  border: 1px solid var(--line);
  padding: 18px 18px 18px 56px;
  margin-bottom: 12px;
  background: rgba(255,255,255,0.015);
  transition: border-color 0.3s, transform 0.3s;
}
.course-card:hover { border-color: var(--ink-dim); transform: translateX(4px); }
.course-tag {
  position: absolute;
  left: 14px; top: 18px;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border: 1px solid var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.course-card h3 {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin-bottom: 6px;
}
.course-card p {
  font-family: var(--serif);
  font-size: 12px;
  line-height: 1.75;
  color: #c0c0c4;
}

/* ============================================================
   Bottom-left big title
   ============================================================ */
.big-title {
  grid-area: title;
  position: relative;
  padding: 28px 0 0 0;
  display: flex; flex-direction: column;
  gap: 6px;
  z-index: 6;
  mix-blend-mode: difference;
}
.big-pre, .big-post {
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.big-text {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 144px);
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: var(--ink);
  display: flex; flex-direction: column;
  text-transform: uppercase;
}
.big-line {
  display: inline-block;
  overflow: hidden;
  position: relative;
  will-change: transform;
}

/* ============================================================
   HUD (bottom progress + nav)
   ============================================================ */
.hud {
  position: fixed;
  left: 28px; right: 28px;
  bottom: 22px;
  height: 56px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  z-index: 90;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.hud-btn {
  display: flex; align-items: center; gap: 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 8px 14px;
  border: 1px solid var(--line);
  transition: border-color 0.3s, color 0.3s, transform 0.3s;
}
.hud-btn em { font-style: normal; }
.hud-btn svg { width: 14px; height: 14px; }
.hud-btn:hover { color: var(--ink); border-color: var(--ink); transform: translateY(-1px); }
.hud-progress {
  display: flex; align-items: center; gap: 16px;
}
.hud-track {
  flex: 1;
  height: 1px;
  background: var(--line);
  position: relative;
}
.hud-fill {
  position: absolute;
  left: 0; top: -1px;
  width: 33.33%;
  height: 3px;
  background: var(--ink);
  transition: width 0.9s cubic-bezier(0.7,0,0.2,1);
}
.hud-pct {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
  min-width: 44px;
  text-align: right;
}

/* ============================================================
   Hint
   ============================================================ */
.hint {
  position: fixed;
  right: 28px;
  bottom: 88px;
  display: flex; align-items: center; gap: 8px;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--ink-mute);
  text-transform: uppercase;
  opacity: 0;
  animation: hintIn 0.8s 1.2s forwards, hintBob 2.4s 2s infinite;
  z-index: 80;
}
@keyframes hintIn { to { opacity: 1; } }
@keyframes hintBob {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-3px); }
}
.hint-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ink-dim);
  box-shadow: 0 0 8px var(--ink-dim);
}

/* ============================================================
   Focus mode
   ============================================================ */
body.is-focus .status-line { opacity: 0.18; }
body.is-focus .rail        { opacity: 0.18; }
body.is-focus .hud         { opacity: 0.4; }
body.is-focus .hint        { opacity: 0; }
body.is-focus .copy-panel.is-active { background: linear-gradient(180deg, rgba(11,11,12,0.2), rgba(11,11,12,0.45)); }
body.is-focus .visual-panel { transform: scale(1.02); }
.status-line, .rail, .hud, .visual-panel { transition: opacity 0.6s, transform 0.6s; }

/* Transition state applied via JS for blur/distortion on panel change */
body.is-transitioning .visual-panel { filter: blur(10px) saturate(1.4); }
body.is-transitioning .big-text { filter: blur(6px); }
.visual-panel, .big-text { transition: filter 0.65s ease; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
  .reel {
    grid-template-columns: 1fr 280px;
    padding: 18px 18px 110px 18px;
  }
  .copy-stack { right: 320px; width: 42%; }
  .rail { padding-left: 16px; margin-left: 16px; }
  .rail-item { grid-template-columns: 80px 1fr; }
  .thumb { width: 80px; height: 52px; }
}

@media (max-width: 820px) {
  .status-line { padding: 0 14px; }
  .status-center { gap: 4px; }
  .nav-dot { padding: 4px 8px; }
  .nav-dot em { display: none; }
  .status-coord { display: none; }
  .focus-toggle em { display: none; }

  .reel {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
    grid-template-areas:
      "visual"
      "title";
    padding: 12px 14px 130px 14px;
  }
  .rail {
    position: fixed;
    bottom: 88px;
    left: 14px; right: 14px;
    border: 1px solid var(--line);
    border-left: 1px solid var(--line);
    margin-left: 0;
    padding: 10px 12px;
    background: rgba(11,11,12,0.9);
    backdrop-filter: blur(8px);
    flex-direction: row;
    gap: 8px;
    z-index: 85;
  }
  .rail-head, .rail-foot { display: none; }
  .rail-list { flex-direction: row; gap: 8px; flex: 1; }
  .rail-item {
    grid-template-columns: 1fr;
    flex: 1;
    padding: 6px;
  }
  .thumb { width: 100%; height: 36px; }
  .thumb-info { display: none; }
  .copy-stack {
    position: absolute;
    top: 70px;
    left: 14px;
    right: 14px;
    width: auto;
    max-width: none;
    height: calc(100% - 240px);
  }
  .copy-panel { padding: 18px; }
  .copy-title { font-size: 18px; }
  .copy-body { font-size: 12px; }
  .big-text { font-size: clamp(36px, 13vw, 80px); }
  .big-title {
    opacity: 0.18;
    pointer-events: none;
  }
  .big-pre,
  .big-post {
    display: none;
  }
  .hud { left: 14px; right: 14px; bottom: 14px; }
  .hint { display: none; }
}

@media (max-width: 480px) {
  .visual-panel .frame-tag { font-size: 8px; padding: 2px 5px; }
  .panel-meta { font-size: 9px; left: 14px; bottom: 14px; }
  .meta-line { width: 30px; }
  .hud-btn em { display: none; }
  .nav-dot span { font-size: 9px; }
  .big-title {
    display: none;
  }
}