/* Richard workspace — independent visual system. Warm amber + teal, light/dark. */
:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --fg: #1a1c1f;
  --muted: #52565d;
  --subtle: #868b93;
  --accent: #bf5a10;
  --accent-soft: rgb(191 90 16 / 8%);
  --teal: #0f7a80;
  --violet: #6d54c8;
  --line: rgb(20 22 26 / 9%);
  --line-strong: rgb(20 22 26 / 16%);
  --error: #b42318;
  --bar: #17191d;
  --bar-fg: #f1efe9;
  /* Wallpaper scrim: lighten the photo so dark text stays readable. */
  --wallpaper-scrim: rgb(247 246 242 / 82%);
  /* Compatibility aliases so workspace.css / workspace.js keep resolving. */
  --background: var(--bg);
  --foreground: var(--fg);
  --primary: var(--accent);
  --soft: var(--accent-soft);
  --line-focus: var(--line-strong);
  --sans: 'Sen', 'Sen Variable', 'LXGW WenKai', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --mono: 'Maple Mono', 'LXGW WenKai', 'SFMono-Regular', Consolas, monospace;
  --z-nav: 10;
  --z-menu: 11;
  --z-skip: 20;
  color-scheme: light;
}

:root[data-theme='dark'] {
  --bg: #0e1013;
  --surface: #16191e;
  --fg: #e8e6df;
  --muted: #a2a7af;
  --subtle: #6c7178;
  --accent: #f0a24b;
  --accent-soft: rgb(240 162 75 / 12%);
  --teal: #4fd1c5;
  --violet: #b9a4ff;
  --line: rgb(255 255 255 / 10%);
  --line-strong: rgb(255 255 255 / 20%);
  --error: #ff8f84;
  --bar: #06070a;
  --bar-fg: #eceae4;
  --wallpaper-scrim: rgb(14 16 19 / 74%);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 280px; scroll-padding-top: 104px; scrollbar-gutter: stable; }
body { margin: 0; min-height: 100dvh; display: flex; flex-direction: column; background: var(--bg); color: var(--fg); font: 14px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
/* Full-viewport wallpaper: drop an image at assets/wallpaper.jpg. The scrim keeps text readable and follows the theme. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(var(--wallpaper-scrim), var(--wallpaper-scrim)),
    url('./assets/wallpaper.jpg') center / cover no-repeat;
}
@media (prefers-reduced-motion: no-preference) {
  body::before { background-attachment: fixed, fixed; }
}
button, input, textarea { font: inherit; }
button, a, input, textarea { -webkit-tap-highlight-color: transparent; }
button { color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; }
button:disabled { cursor: not-allowed; opacity: .45; }
button, a { touch-action: manipulation; transition: color 150ms, background-color 150ms, border-color 150ms, opacity 150ms; }
button:active { transform: translateY(1px); }
button:focus-visible, a:focus-visible, textarea:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
[hidden] { display: none !important; }
p, h1, h2, h3 { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
::selection { background: var(--accent); color: #fff; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: var(--z-skip); padding: 10px 16px; border-radius: 8px; color: #fff; background: var(--accent); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
#page-top { position: absolute; width: 1px; height: 1px; top: 0; pointer-events: none; }
#main-content { display: flex; flex: 1; flex-direction: column; outline: 0; }

/* ---- Top bar (independent design: flat left-aligned bar, block-cursor mark) ---- */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav); display: flex; justify-content: center; padding: 16px; pointer-events: none; }
.topbar { pointer-events: auto; position: relative; width: min(760px, 100%); }
.topbar-inner { display: flex; height: 46px; align-items: center; gap: 6px; padding: 0 8px 0 14px; border-radius: 12px; background: var(--bar); color: var(--bar-fg); box-shadow: 0 10px 30px -18px rgb(0 0 0 / 70%), inset 0 0 0 1px rgb(255 255 255 / 6%); }
.topbar-brand-btn { display: flex; flex: 1; min-width: 0; height: 46px; align-items: center; gap: 10px; text-align: left; color: inherit; border-radius: 10px; }
.brand-cursor { font: 700 15px/1 var(--mono); color: var(--accent); }
.brand-name { flex: 1; min-width: 0; font-weight: 600; font-size: 14px; letter-spacing: .01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-tag { font: 500 11px/1 var(--mono); color: rgb(255 255 255 / 42%); }
.topbar-divider { width: 1px; height: 18px; background: rgb(255 255 255 / 14%); }
.theme-toggle { width: 40px; height: 40px; flex-shrink: 0; display: grid; place-items: center; border-radius: 9px; color: inherit; }
.theme-toggle:hover { background: rgb(255 255 255 / 8%); }
.theme-icon { font: 20px/1 Arial, sans-serif; }
.nav-toggle-caret { width: 38px; height: 40px; flex-shrink: 0; display: grid; place-items: center; border-radius: 9px; color: inherit; font: 13px/1 var(--mono); }
.nav-toggle-caret:hover { background: rgb(255 255 255 / 8%); }
.nav-menu { position: absolute; z-index: var(--z-menu); top: 56px; right: 0; width: min(320px, 100%); display: grid; grid-template-columns: 1fr 1fr; gap: 3px; padding: 8px; background: var(--bar); border-radius: 14px; box-shadow: 0 18px 44px -22px rgb(0 0 0 / 78%), inset 0 0 0 1px rgb(255 255 255 / 6%); transform-origin: top right; animation: menu-in 170ms cubic-bezier(.16,1,.3,1); }
.nav-menu a { display: flex; min-height: 44px; gap: 10px; align-items: center; padding: 8px 12px; border-radius: 9px; text-decoration: none; color: rgb(255 255 255 / 78%); font-size: 13px; }
.nav-menu a > span { width: 20px; text-align: center; font-family: var(--mono); color: var(--accent); }
.nav-menu a:hover, .nav-menu a[aria-current='page'] { color: #fff; background: rgb(255 255 255 / 9%); }
.nav-menu a:last-child { grid-column: 1 / -1; }

/* ---- Terminal ---- */
.terminal { flex: 1; }
.terminal-content { max-width: 960px; margin: 0 auto; padding: 96px 40px 96px; }
.welcome { color: var(--muted); min-height: 40px; line-height: 1.9; }
.wave { padding-right: 6px; }
.welcome kbd { font: inherit; color: var(--fg); }
.text-command { display: inline; padding: 0 4px; border-radius: 4px; font-weight: 600; color: var(--accent); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 38%, transparent); text-underline-offset: 3px; }
.text-command:hover { text-decoration-color: currentColor; background: var(--accent-soft); }
.current-command { margin-top: 30px; }
.prompt { display: flex; align-items: baseline; flex-wrap: wrap; column-gap: 6px; row-gap: 2px; min-height: 24px; color: var(--subtle); font: 13px/22px var(--mono); }
.prompt-user { color: var(--teal); font-weight: 700; }
.prompt-at { color: var(--subtle); }
.prompt-host { color: var(--violet); font-weight: 600; }
.prompt-path { color: var(--accent); font-weight: 600; }
.prompt-time { margin-left: auto; display: inline-flex; align-items: center; gap: 5px; font: 400 11px/22px var(--mono); color: var(--subtle); white-space: nowrap; }
.prompt-result { color: var(--teal); font-weight: 700; }
.prompt-result:empty { display: none; }
.prompt-result.is-error { color: var(--error); }
.input-row { min-height: 46px; display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 10px; padding: 0 10px 0 14px; margin-top: 8px; background: color-mix(in srgb, var(--surface) 60%, transparent); transition: border-color 180ms, box-shadow 180ms; }
.input-row:focus-within { border-color: color-mix(in srgb, var(--accent) 55%, var(--line-strong)); box-shadow: 0 0 0 3px var(--accent-soft); }
.prompt-chevron { color: var(--accent); flex-shrink: 0; font: 700 15px/1 var(--mono); }
#terminal-input { flex: 1; min-width: 0; min-height: 44px; border: 0; padding: 0; outline: none; color: var(--fg); background: transparent; caret-color: var(--accent); font-family: var(--mono); }
#terminal-input::placeholder { color: var(--subtle); opacity: 1; }
.submit-command { width: 40px; height: 40px; flex-shrink: 0; display: grid; place-items: center; border-radius: 8px; color: var(--muted); font: 20px/1 var(--mono); }
.submit-command:hover { color: var(--fg); background: var(--accent-soft); }
.assist-line { margin-top: 12px; min-height: 24px; }
.keyboard-hints { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--subtle); font-size: 12px; line-height: 22px; }
.keyboard-hints > span { white-space: nowrap; }
.keyboard-hints kbd { font: 600 12px/22px var(--mono); color: var(--muted); }
.suggestions { display: flex; flex-wrap: wrap; gap: 5px 7px; max-width: 850px; }
.suggestion { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; padding: 3px 10px; border-radius: 7px; border: 1px solid var(--line); text-align: left; color: var(--muted); font-size: 12px; }
.suggestion strong { font: 500 12px/22px var(--mono); color: var(--accent); }
.suggestion:hover, .suggestion[aria-selected='true'] { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); color: var(--fg); }
.suggestion-detail { color: var(--subtle); }

/* ---- Transcript & command output ---- */
.transcript { display: grid; gap: 26px; margin-top: 30px; }
.transcript:empty { display: none; }
.history-entry { min-width: 0; padding-left: 14px; border-left: 2px solid var(--line); }
.history-prompt { opacity: .72; }
.history-command { display: flex; gap: 8px; min-height: 26px; align-items: baseline; font: 14px/26px var(--mono); overflow-wrap: anywhere; }
.history-command .prompt-chevron { margin: 0; font-size: 14px; }
.command-output { margin-top: 12px; max-width: 900px; color: var(--muted); animation: result-in 180ms cubic-bezier(.16,1,.3,1); }
.command-output p { max-width: 72ch; }
.output-error { color: var(--error); }
.output-note { margin-top: 8px; color: var(--subtle); font-size: 13px; }
.output-code { white-space: pre-wrap; overflow-wrap: anywhere; font: 13px/1.9 var(--mono); margin: 0; color: var(--fg); }
.inline-command { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; padding: 0 3px; font-family: var(--mono); }
.help-groups { display: grid; gap: 22px; max-width: 660px; }
.help-group h2 { margin-bottom: 8px; color: var(--subtle); font: 600 11px/20px var(--mono); letter-spacing: .12em; }
.command-list { display: grid; gap: 1px; }
.command-choice { display: grid; grid-template-columns: 96px minmax(0,1fr); align-items: center; gap: 16px; min-height: 36px; padding: 6px 10px; margin-left: -10px; border-radius: 8px; text-align: left; }
.command-choice:hover { background: var(--accent-soft); }
.command-choice code { color: var(--teal); font: 14px/22px var(--mono); }
.command-choice > span { color: var(--muted); font-size: 13px; }
.directory-list { display: grid; max-width: 780px; }
.directory-link { display: grid; grid-template-columns: 104px minmax(0,1fr) 20px; gap: 16px; min-height: 46px; align-items: center; padding: 9px 10px; margin-left: -10px; text-decoration: none; border-radius: 8px; }
.directory-link:hover { background: var(--accent-soft); }
.directory-link code { font: 14px/22px var(--mono); color: var(--teal); }
.directory-link > span { font-size: 13px; color: var(--muted); }
.directory-arrow { justify-self: end; color: var(--accent); }
.profile-heading { font-size: clamp(24px, 4vw, 34px); font-weight: 700; letter-spacing: -.02em; margin-bottom: 14px; }
.profile-intro { max-width: 650px; font-size: 15px; line-height: 1.9; color: var(--muted); }
.profile-interests { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 16px; align-items: center; }
.profile-interests span:first-child { color: var(--subtle); font-size: 13px; }
.profile-interests span:not(:first-child) { color: var(--accent); font: 13px/22px var(--mono); padding: 2px 9px; border-radius: 999px; background: var(--accent-soft); }
.theme-options { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.choice-button { min-height: 40px; padding: 7px 14px; border: 1px solid var(--line-strong); border-radius: 8px; text-align: left; }
.choice-button:hover, .choice-button[aria-pressed='true'] { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.noscript-message { margin-top: 30px; }

/* ---- Standalone pages ---- */
.page-view { width: 100%; max-width: 900px; margin: 0 auto; padding: 116px 40px 96px; animation: result-in 220ms cubic-bezier(.16,1,.3,1); }
.page-path { color: var(--accent); font: 13px/22px var(--mono); margin-bottom: 26px; }
.page-view h1 { margin: 0 0 20px; font-size: clamp(28px, 5vw, 42px); line-height: 1.22; font-weight: 700; letter-spacing: -.03em; }
.page-lead { max-width: 58ch; color: var(--muted); font-size: 16px; line-height: 1.9; }
.about-body { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line-strong); }
.about-body p { max-width: 60ch; line-height: 1.9; color: var(--muted); margin-bottom: 18px; }
.about-body h2 { margin-bottom: 15px; font-weight: 600; font-size: 18px; }
.back-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; margin-top: 40px; font-size: 13px; text-decoration: none; color: var(--accent); }
.back-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.empty-state { padding: 36px 0; margin-top: 30px; border-top: 1px solid var(--line-strong); }
.empty-state .empty-symbol { color: var(--subtle); font: 28px/1.4 var(--mono); margin-bottom: 18px; }
.empty-state p { color: var(--muted); }
.guest-form { display: grid; gap: 20px; margin-top: 32px; max-width: 600px; }
.guest-form label { display: block; font-size: 13px; margin-bottom: 7px; color: var(--muted); }
.guest-form input, .guest-form textarea { display: block; width: 100%; border: 1px solid var(--line-strong); border-radius: 8px; color: var(--fg); background: color-mix(in srgb, var(--surface) 55%, transparent); padding: 11px 13px; min-height: 46px; }
.guest-form input:focus, .guest-form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.guest-form textarea { min-height: 112px; resize: vertical; }
.guest-form ::placeholder { color: var(--subtle); opacity: 1; }
.form-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.form-bottom p { font-size: 12px; color: var(--subtle); }
.primary-button { background: var(--accent); color: #fff; min-height: 46px; padding: 11px 20px; border-radius: 8px; white-space: nowrap; font-weight: 600; }
.primary-button:hover { opacity: .9; }
.guest-entries { display: grid; gap: 24px; margin-top: 40px; max-width: 600px; }
.guest-entry { border-top: 1px solid var(--line-strong); padding-top: 20px; }
.guest-entry header { display: flex; gap: 15px; align-items: baseline; margin-bottom: 10px; }
.guest-entry strong { color: var(--fg); }
.guest-entry time { color: var(--subtle); font: 11px/22px var(--mono); }
.guest-entry p { white-space: pre-wrap; overflow-wrap: anywhere; color: var(--muted); }
.field-error { color: var(--error); font-size: 13px; min-height: 22px; }

/* ---- Footer & utilities ---- */
.site-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; padding: 0 40px max(24px, env(safe-area-inset-bottom)); flex-shrink: 0; font-size: 13px; font-weight: 500; color: var(--subtle); line-height: 20px; }
.site-footer a { color: var(--muted); text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, var(--fg) 22%, transparent); }
.site-footer a:hover { color: var(--accent); text-decoration-color: currentColor; }
.site-footer strong { color: var(--fg); font-weight: 700; }
.back-to-top { position: fixed; bottom: 22px; right: 22px; min-width: 44px; min-height: 44px; border-radius: 10px; background: var(--surface); color: var(--accent); border: 1px solid var(--line-strong); box-shadow: 0 8px 24px -14px rgb(0 0 0 / 60%); }

@keyframes result-in { from { opacity: .3; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
@keyframes menu-in { from { opacity: 0; transform: translateY(-5px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

@media (max-width: 767px) {
  .site-header { padding: 10px; }
  .terminal-content { padding: 84px 18px 72px; }
  .page-view { padding: 92px 20px 64px; }
  .site-footer { padding-inline: 18px; justify-content: center; text-align: center; }
  .command-choice { min-height: 44px; grid-template-columns: 84px minmax(0,1fr); gap: 10px; }
  .directory-link { grid-template-columns: 86px minmax(0,1fr) 16px; gap: 10px; }
  .suggestion { min-height: 36px; }
  .suggestion-detail { display: none; }
  .prompt-time { display: none; }
}
@media (max-width: 639px) {
  .keyboard-hints { gap: 2px 12px; font-size: 11px; }
  #terminal-input { font-size: 16px; }
  .form-bottom { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}