/*
 * Tetsu Corp: the shared look (every page).
 * Cream paper, ink outlines, the coral and cream stripes of Tetsu's headphones, the sunset over the city.
 * Night city is the dark theme: html[data-theme="night"], set by js/theme.js from the visitor's choice or their system.
 */

:root {
  --paper: #fff8ea;
  --paper-2: #fbefd8;
  --paper-3: #f3e2c4;
  --card: #fffdf6;
  --ink: #15171c;
  --ink-2: #2b2f39;
  --muted: #6a625c;
  --line: #15171c;
  --line-soft: rgba(21, 23, 28, 0.14);
  --shadow: #15171c;
  --coral: #f2614d;
  --coral-deep: #c8483a;
  --coral-soft: #fdd9cf;
  --sun: #fec074;
  --sun-soft: #fff0cf;
  --peach: #fdc497;
  --lav: #be92ad;
  --violet: #534570;
  --navy: #1c2533;
  --night: #141821;
  --teal: #2f8f83;
  --teal-soft: #d5eee9;
  --danger: #d23a2c;
  --warn: #c98a12;
  --ok: #2f8f83;
  --on-coral: #15171c;
  --on-ink: #fff8ea;
  --dot: rgba(21, 23, 28, 0.07);
  --sunset: linear-gradient(180deg, #be92ad 0%, #f99f7f 42%, #fec074 74%, #fcebb4 100%);
  --sunset-x: linear-gradient(90deg, #534570 0%, #be92ad 28%, #f99f7f 58%, #fec074 86%, #fcebb4 100%);
  --radius: 10px;
  --radius-s: 6px;
  --cel: 4px 4px 0 var(--shadow);
  --cel-s: 3px 3px 0 var(--shadow);
  --wrap: 1180px;
  --gutter: 20px;
  --nav-h: 64px;
  --ca-h: 34px; /* the $TETSU contract address bar on top of the header */
  --head-h: calc(var(--nav-h) + var(--ca-h));
  --font-ui: 'Chakra Petch', 'Avenir Next', 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Dela Gothic One', 'Arial Black', 'Hiragino Kaku Gothic StdN', sans-serif;
  --font-num: 'Space Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-jp: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', 'Noto Sans CJK JP', 'Yu Gothic', 'Meiryo', sans-serif;
  color-scheme: light;
}

html[data-theme='night'] {
  --paper: #141821;
  --paper-2: #1a2030;
  --paper-3: #232b3d;
  --card: #1c2433;
  --ink: #f6ecdc;
  --ink-2: #d9cdbb;
  --muted: #a99d93;
  --line: #070a0f;
  --line-soft: rgba(246, 236, 220, 0.14);
  --shadow: #05070b;
  --coral-soft: #4a2a2a;
  --sun-soft: #3a3020;
  --teal-soft: #173634;
  --on-coral: #15171c;
  --on-ink: #15171c;
  --dot: rgba(246, 236, 220, 0.05);
  --ok: #4fc0b0;
  --teal: #4fc0b0;
  --danger: #ff6a5a;
  --warn: #f0b23c;
  color-scheme: dark;
}

/* ------------------------------------------------------------------------------------------------ base */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--head-h) + 12px); }
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--paper);
  background-image: radial-gradient(var(--dot) 1px, transparent 1.2px);
  background-size: 6px 6px;
  color: var(--ink);
  font: 500 16px/1.55 var(--font-ui);
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--coral-deep); }
html[data-theme='night'] a:hover { color: var(--coral); }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
::selection { background: var(--coral); color: #15171c; }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3, h4 { margin: 0; line-height: 1.08; }
p { margin: 0; }
.sr { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.muted { color: var(--muted); }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--on-ink); padding: 10px 14px; border-radius: 8px; }
.skip:focus { top: 12px; }

/* ------------------------------------------------------------------------------------------------ type */

.display { font-family: var(--font-display); font-weight: 400; letter-spacing: 0.005em; text-transform: uppercase; }
.kana { font-family: var(--font-jp); font-weight: 700; letter-spacing: 0.08em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 700 12px/1 var(--font-ui); letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted);
}
.eyebrow .kana { color: var(--coral-deep); font-size: 13px; letter-spacing: 0.1em; }
html[data-theme='night'] .eyebrow .kana { color: var(--coral); }
.ep {
  display: inline-flex; align-items: center; gap: 0;
  border: 2px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--card);
  font: 700 12px/1 var(--font-ui); letter-spacing: 0.14em; text-transform: uppercase; box-shadow: var(--cel-s);
}
.ep b { background: var(--ink); color: var(--paper); padding: 7px 10px; font-weight: 700; }
.ep span { padding: 7px 12px; }
.ep .kana { padding: 7px 12px 7px 0; color: var(--coral-deep); font-size: 12px; }
html[data-theme='night'] .ep .kana { color: var(--coral); }
.h-sec { font-family: var(--font-display); font-weight: 400; font-size: clamp(30px, 5vw, 54px); line-height: 1.02; text-transform: uppercase; letter-spacing: 0.005em; }
.h-sec em { font-style: normal; color: var(--coral); -webkit-text-stroke: 0; }
.lede { font-size: clamp(17px, 2.1vw, 20px); line-height: 1.5; color: var(--ink-2); max-width: 62ch; }

/* the headphone band: cream, coral, cream inside an ink outline */
.band { height: 14px; border-block: 2px solid var(--line); background: linear-gradient(180deg, var(--paper-2) 0 3px, var(--coral) 3px 9px, var(--paper-2) 9px); }
.band.thin { height: 10px; background: linear-gradient(180deg, var(--paper-2) 0 2px, var(--coral) 2px 6px, var(--paper-2) 6px); }

/* ------------------------------------------------------------------------------------------------ buttons and chips */

.btn {
  --b-bg: var(--card); --b-fg: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 20px;
  background: var(--b-bg); color: var(--b-fg);
  border: 2px solid var(--line); border-radius: 999px;
  font: 700 15px/1 var(--font-ui); letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none; white-space: nowrap;
  box-shadow: var(--cel-s);
  transition: transform 0.08s ease, box-shadow 0.08s ease, background-color 0.15s ease;
  -webkit-tap-highlight-color: transparent; user-select: none;
}
.btn:hover { color: var(--b-fg); transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--shadow); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
.btn[disabled], .btn[aria-disabled='true'] { cursor: not-allowed; opacity: 0.55; transform: none; box-shadow: var(--cel-s); }
.btn.coral { --b-bg: var(--coral); --b-fg: var(--on-coral); }
.btn.ink { --b-bg: var(--ink); --b-fg: var(--paper); }
html[data-theme='night'] .btn.ink { --b-bg: var(--paper-3); --b-fg: var(--ink); }
.btn.ghost { --b-bg: transparent; box-shadow: none; }
.btn.ghost:hover { box-shadow: none; background: var(--paper-2); }
.btn.small { min-height: 38px; padding: 0 14px; font-size: 13px; }
.btn.block { width: 100%; }
.btn svg { width: 18px; height: 18px; flex: none; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 26px; padding: 0 10px; border: 1.5px solid var(--line); border-radius: 999px; background: var(--card);
  font: 700 11px/1 var(--font-ui); letter-spacing: 0.1em; text-transform: uppercase; white-space: nowrap;
}
.chip.coral { background: var(--coral); color: var(--on-coral); }
.chip.ink { background: var(--ink); color: var(--paper); }
.chip.sun { background: var(--sun); color: #15171c; }
.chip.teal { background: var(--teal-soft); color: var(--ink); }
.chip.warn { background: var(--sun-soft); }
.chip.danger { background: var(--danger); color: #fff8ea; border-color: var(--line); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 2px var(--line); flex: none; }
.dot.live { animation: pulse 1.6s ease-in-out infinite; }
.dot.off { background: var(--muted); }
.dot.warn { background: var(--warn); }
.dot.danger { background: var(--danger); }
@keyframes pulse { 50% { opacity: 0.35; } }

/* ------------------------------------------------------------------------------------------------ panels */

.panel {
  position: relative; background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--cel);
}
.panel.pad { padding: 22px; }
.panel.night { background: var(--navy); color: #f6ecdc; border-color: #070a0f; }
.panel.night .muted { color: #a99d93; }
.panel.sunset { background: var(--sunset); color: #15171c; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 2px solid var(--line); }
.panel-head h3 { font: 700 15px/1.2 var(--font-ui); letter-spacing: 0.08em; text-transform: uppercase; }

.logo-tile { width: 40px; height: 40px; border-radius: 10px; flex: none; border: 1.5px solid var(--line); background: #fff; object-fit: cover; }
.logo-tile.s { width: 30px; height: 30px; border-radius: 8px; }
.logo-tile.l { width: 56px; height: 56px; border-radius: 14px; }

/* ------------------------------------------------------------------------------------------------ nav */

.nav {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  -webkit-backdrop-filter: saturate(1.3) blur(10px); backdrop-filter: saturate(1.3) blur(10px);
  border-bottom: 2px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 16px; height: var(--nav-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand:hover { color: var(--ink); }
.brand img { width: 38px; height: 38px; border-radius: 50%; flex: none; }
.brand-txt { display: flex; flex-direction: column; line-height: 1; min-width: 0; }
.brand-word { font: 400 19px/1 var(--font-display); letter-spacing: 0.02em; white-space: nowrap; }
.brand-kana { font: 400 10px/1 var(--font-display); letter-spacing: 0.32em; color: var(--coral-deep); margin-top: 4px; white-space: nowrap; }
html[data-theme='night'] .brand-kana { color: var(--coral); }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: 18px; }
.nav-links a {
  display: inline-flex; align-items: center; min-height: 40px; padding: 0 12px; border-radius: 999px;
  font: 700 14px/1 var(--font-ui); letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
}
.nav-links a:hover { background: var(--paper-2); color: var(--ink); }
.nav-links a[aria-current='page'] { background: var(--ink); color: var(--paper); }
.nav-links .x-link svg { width: 15px; height: 15px; flex: none; min-width: 15px; }
.nav-act { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none;
  border: 2px solid var(--line); border-radius: 50%; background: var(--card); box-shadow: var(--cel-s);
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
.icon-btn svg { width: 20px; height: 20px; }
.theme-btn .moon { display: none; }
html[data-theme='night'] .theme-btn .sun { display: none; }
html[data-theme='night'] .theme-btn .moon { display: block; }
.menu-btn { display: none; }

.sheet-menu {
  position: fixed; inset: var(--head-h) 0 auto 0; z-index: 39; display: none;
  background: var(--paper); border-bottom: 2px solid var(--line); padding: 14px var(--gutter) 20px;
  box-shadow: 0 12px 0 rgba(21, 23, 28, 0.08);
}
.sheet-menu.open { display: block; }
.sheet-menu a {
  display: flex; align-items: center; justify-content: space-between; min-height: 54px; padding: 0 6px;
  border-bottom: 1.5px dashed var(--line-soft); text-decoration: none;
  font: 400 20px/1 var(--font-display); text-transform: uppercase;
}
.sheet-menu a .kana { font-size: 12px; color: var(--coral-deep); }
.sheet-menu .btn { margin-top: 16px; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .menu-btn { display: inline-grid; }
  /* a phone keeps the way in: a compact app button, and the theme switch moves into the menu */
  .nav-act .btn.launch { min-height: 40px; padding: 0 14px; font-size: 12px; box-shadow: none; }
  .nav-act:has(.menu-btn) .theme-btn { display: none; }
}
@media (max-width: 379px) { .nav-act .btn.launch { display: none; } }
@media (max-width: 420px) { .nav-in:has(.nav-act .launch) .brand-word { font-size: 16px; } .nav-act:has(.launch) { gap: 8px; } }
.menu-theme { display: flex; width: 100%; align-items: center; justify-content: space-between; min-height: 54px; padding: 0 6px; border: 0; border-bottom: 1.5px dashed var(--line-soft); background: none; color: var(--ink); font: 400 20px/1 var(--font-display); text-transform: uppercase; }
.menu-theme .kana { font-size: 12px; color: #b03a2e; }
html[data-theme='night'] .sheet-menu .kana, html[data-theme='night'] .menu-theme .kana { color: var(--coral); }
@media (max-width: 380px) {
  .brand-kana { display: none; }
  .brand-word { font-size: 17px; }
}

/* ------------------------------------------------------------------------------------------------ footer */

.foot { margin-top: 80px; background: var(--ink); color: var(--paper); }
html[data-theme='night'] .foot { background: #0b0e14; color: #f6ecdc; }
.foot-in { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; padding: 40px var(--gutter) 28px; }
.foot .brand { color: inherit; }
.foot .brand-kana { color: var(--coral); }
.foot p { color: #cfc4b3; font-size: 14px; margin-top: 14px; max-width: 38ch; }
.foot h4 { font: 700 12px/1 var(--font-ui); letter-spacing: 0.16em; text-transform: uppercase; color: var(--sun); margin-bottom: 12px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.foot ul a { display: inline-flex; align-items: center; min-height: 34px; text-decoration: none; color: #f6ecdc; font-weight: 600; }
.foot ul a:hover { color: var(--coral); }
@media (max-width: 860px) { .foot ul a { min-height: 44px; } }
.foot-base { border-top: 1px solid rgba(246, 236, 220, 0.16); }
.foot-base .wrap { display: flex; flex-wrap: wrap; gap: 10px 20px; justify-content: space-between; align-items: center; padding-block: 16px; font-size: 13px; color: #cfc4b3; }
.foot-base b { font: 400 13px/1 var(--font-display); letter-spacing: 0.06em; color: #f6ecdc; }
@media (max-width: 760px) {
  .foot-in { grid-template-columns: 1fr 1fr; }
  .foot-in > :first-child { grid-column: 1 / -1; }
}

/* ------------------------------------------------------------------------------------------------ misc */

.toast-host { position: fixed; z-index: 90; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom)); transform: translateX(-50%); display: grid; gap: 10px; width: min(460px, calc(100% - 24px)); pointer-events: none; }
.toast {
  cursor: pointer; pointer-events: auto; display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px;
  background: var(--ink); color: var(--paper); border: 2px solid var(--line); border-radius: 12px; box-shadow: var(--cel);
  font-weight: 600; font-size: 14px; animation: toast-in 0.18s ease-out;
}
html[data-theme='night'] .toast { background: var(--paper-3); color: var(--ink); }
.toast .dot { margin-top: 6px; }
.toast a { color: var(--sun); }
@keyframes toast-in { from { transform: translateY(8px); opacity: 0; } }
@keyframes toast-drop { from { transform: translateY(-8px); opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ------------------------------------------------------------------------------------------------ the $TETSU CA bar */

.ca-bar { height: var(--ca-h); background: var(--ink); color: var(--paper); border-bottom: 2px solid var(--coral); }
html[data-theme='night'] .ca-bar { background: #07080b; color: #f6ecdc; }
.ca-in { display: flex; align-items: center; gap: 10px; height: 100%; min-width: 0; }
.ca-tag { flex: none; font: 700 11px/1 var(--font-ui); letter-spacing: 0.12em; text-transform: uppercase; color: var(--sun); }
.ca-tag b { padding: 2px 5px; margin-left: 2px; background: var(--coral); color: #15171c; border-radius: 3px; }
.ca-addr { min-width: 0; padding: 0; border: 0; background: none; color: inherit; cursor: copy; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 700 12.5px/1 var(--font-num); letter-spacing: 0.01em; }
.ca-addr:hover { color: var(--sun); }
.ca-btn { flex: none; display: inline-flex; align-items: center; min-height: 24px; padding: 0 10px; border: 1.5px solid currentColor; border-radius: 999px; background: none; color: inherit; font: 700 11px/1 var(--font-ui); letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; cursor: pointer; position: relative; }
.ca-btn::after { content: ''; position: absolute; inset: -6px -3px; } /* a finger-sized target in a slim bar */
.ca-btn:hover { background: var(--coral); color: #15171c; border-color: var(--coral); }
.ca-buy { background: var(--sun); color: #15171c; border-color: var(--sun); }
@media (max-width: 520px) { .ca-tag { font-size: 10px; } .ca-addr { font-size: 10.5px; letter-spacing: 0; } .ca-in { gap: 8px; } }
@media (max-width: 480px) {
  /* a phone shows the whole address: tapping it copies, so the Copy and Buy buttons step aside */
  .ca-in .ca-btn { display: none; }
  .ca-tag { font-size: 0; } .ca-tag b { font-size: 10px; margin: 0; }
  .ca-addr { font-size: 11px; letter-spacing: -0.01em; }
}
@media (max-width: 370px) { .ca-addr { font-size: 10px; letter-spacing: -0.02em; } }