/* DOM Mail
 * One stylesheet, no framework, no build step.
 *
 * Design rules that shaped this file:
 *  - The top 25% of the viewport is chrome and never scrolls.
 *  - Frames are 90% transparent. The visible 10% carries the accent.
 *  - The accent is a single custom property, --neon. One declaration
 *    restyles the whole interface, which is what makes the style
 *    overhaul button a single random hue rather than a theme object.
 *  - Everything animates through opacity and transform only, so the
 *    compositor does the work and the main thread stays free.
 */

/* ------------------------------- tokens ------------------------------- */

:root {
  --neon: #00e5ff;
  --accent: var(--neon);

  --radius: 14px;
  --radius-sm: 9px;
  --chrome-h: 25vh;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --fast: 140ms;
  --slow: 320ms;

  --ui: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  /* Enriched system font stack. No network request, so a TOR page load
     stays a single round trip and the page renders offline. */
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
}

html[data-font="inter"] {
  --ui: "Inter", ui-sans-serif, system-ui, sans-serif;
}
html[data-font="jetbrains"] {
  --ui: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
}

html[data-mode="dark"] {
  --bg: #101012;
  --bg-elev: #16161a;
  --fg: #e9e9ee;
  --fg-muted: #9a9aa8;
  --fg-faint: #6b6b78;
  --line: color-mix(in oklab, var(--neon) 10%, transparent);
  --line-solid: color-mix(in oklab, var(--neon) 100%, transparent);
  --card: color-mix(in oklab, var(--bg-elev) 88%, transparent);
  --shade: color-mix(in oklab, #000 55%, transparent);
}

html[data-mode="light"] {
  --bg: #fbf8f4;
  --bg-elev: #ffffff;
  --fg: #17171a;
  --fg-muted: #5d5d68;
  --fg-faint: #8d8d99;
  --line: color-mix(in oklab, var(--neon) 12%, transparent);
  --line-solid: color-mix(in oklab, var(--neon) 100%, transparent);
  --card: color-mix(in oklab, var(--bg-elev) 92%, transparent);
  --shade: color-mix(in oklab, #3a2c10 12%, transparent);
}

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

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ui);
  font-size: 16px;
  line-height: 1.45;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* The accent bleeds once, very faintly, into the page. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(120vmax 90vmax at 88% -10%,
    color-mix(in oklab, var(--neon) 11%, transparent), transparent 60%);
  transition: background var(--slow) var(--ease);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; background: none; border: 0; }

:focus-visible {
  outline: 2px solid var(--line-solid);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: .6rem 1rem;
  background: var(--bg-elev);
  color: var(--fg);
}
.skip:focus { left: .5rem; top: .5rem; }

.spacer { flex: 1; }
.major { font-size: 1.15rem; margin: 0 0 .5rem; }
.minor { font-size: .8rem; color: var(--fg-muted); }
.spacer + .minor { margin-left: .5rem; }

/* --------------------- chrome: the top 25% --------------------- */

#chrome {
  position: relative;
  z-index: 2;
  height: var(--chrome-h);
  min-height: 120px;
  padding: clamp(.6rem, 1.6vh, 1.2rem) clamp(.8rem, 2vw, 1.6rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: .4rem;
  /* The frame is 90% transparent: only a sliver of it is drawn. */
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line-solid);
  background: var(--card);
  backdrop-filter: blur(8px);
}

.chrome-row {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: nowrap;
  min-width: 0;
}

.chrome-left { display: flex; align-items: center; gap: .5rem; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-weight: 620;
  letter-spacing: -.015em;
  white-space: nowrap;
}
.brand img { display: block; }

/* --------------------- round switches --------------------- */

.round {
  --size: 2.35rem;
  width: var(--size);
  height: var(--size);
  flex: 0 0 auto;
  border-radius: 999px;
  border: 1px solid var(--line-solid);
  background: color-mix(in oklab, var(--bg-elev) 70%, transparent);
  position: relative;
  display: grid;
  place-items: center;
  transition: border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}
.round:hover { background: color-mix(in oklab, var(--neon) 14%, var(--bg-elev)); }
.round:active { transform: scale(.94); }

.round-knob {
  width: 58%;
  height: 58%;
  border-radius: 999px;
  background: var(--neon);
  transition: transform var(--slow) var(--ease), background var(--slow) var(--ease);
  will-change: transform;
}
/* Dark: knob parked left. Light: knob slides right. */
html[data-mode="dark"] .round-knob { transform: translateX(-38%); }
html[data-mode="light"] .round-knob { transform: translateX(38%); }
.round .glyph { font-size: .8rem; color: var(--fg); transform: none; }
#overhaul .glyph { transition: transform var(--slow) var(--ease); }
#overhaul:active .glyph { transform: rotate(180deg); }

/* --------------------- tabs --------------------- */

.tabs {
  margin-left: auto;
  display: flex;
  gap: .15rem;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  position: relative;
  padding: .42rem .7rem;
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  white-space: nowrap;
  font-size: .9rem;
  font-weight: 500;
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease);
}
.tab:hover { color: var(--fg); background: color-mix(in oklab, var(--neon) 9%, transparent); }
.tab[aria-selected="true"] { color: var(--fg); }
/* The active marker is the one solid frame in the bar. */
.tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: .55rem;
  right: .55rem;
  bottom: .12rem;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
}
.tab-danger { color: color-mix(in oklab, #ff5a5a var(--fg-muted), var(--fg)); }
.tab-danger:hover { background: color-mix(in oklab, #ff5a5a 16%, transparent); }
.tab-danger[aria-selected="true"]::after { background: #ff5a5a; }

.count {
  font-size: .68rem;
  font-variant-numeric: tabular-nums;
  color: var(--fg-faint);
  margin-left: .15rem;
}
.tab[data-unread="true"] .count { color: var(--neon); font-weight: 700; }

.chrome-row--id { font-size: .78rem; }

.identity {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--fg-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.pill {
  padding: .3rem .62rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--fg-muted);
  font-size: .74rem;
  white-space: nowrap;
  transition: all var(--fast) var(--ease);
}
.pill:hover { color: var(--fg); border-color: var(--line-solid); }
.pill[aria-pressed="true"] {
  color: var(--neon);
  border-color: var(--line-solid);
  background: color-mix(in oklab, var(--neon) 13%, transparent);
}
.pill--go {
  background: var(--neon);
  color: #0a0a0c;
  border-color: transparent;
  font-weight: 600;
}
.pill--go:hover { filter: brightness(1.12); color: #0a0a0c; }
.pill--quiet { border-color: transparent; color: var(--fg-faint); }
.pill--file { cursor: pointer; }

/* --------------------- view: the bottom 75% --------------------- */

#view {
  position: relative;
  z-index: 1;
  height: calc(100vh - var(--chrome-h));
  height: calc(100dvh - var(--chrome-h));
  overflow: hidden;
  display: grid;
}

.page {
  grid-area: 1 / 1;
  padding: clamp(.8rem, 2vh, 1.5rem) clamp(.8rem, 2vw, 1.6rem);
  overflow-y: auto;
  overscroll-behavior: contain;
}
/* Pages slide. Only opacity and transform, so it stays on the compositor. */
.page[hidden] { display: block; visibility: hidden; pointer-events: none; }
.page {
  opacity: 0;
  transform: translateX(14px);
  transition: opacity var(--fast) var(--ease), transform var(--slow) var(--ease);
}
.page.is-active { opacity: 1; transform: none; }

.page-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: .7rem;
}
.page-head h1 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -.01em;
  margin: 0;
}

.empty {
  color: var(--fg-faint);
  font-size: .9rem;
  margin: 2rem 0;
  text-align: center;
}

/* --------------------- message lists --------------------- */

.list { list-style: none; margin: 0; padding: 0; }

.msg {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: .1rem .7rem;
  padding: .6rem .2rem;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: background var(--fast) var(--ease);
}
.msg:hover { background: color-mix(in oklab, var(--neon) 7%, transparent); }
.msg strong { font-weight: 600; }
.msg .who {
  color: var(--fg-muted);
  font-size: .82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.msg .subj {
  grid-column: 2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.msg[data-read="false"] .subj { font-weight: 650; }
.msg[data-read="false"]::before {
  content: "";
  grid-row: 1;
  align-self: center;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--neon);
}
.msg .when {
  color: var(--fg-faint);
  font-size: .74rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.msg .snippet {
  grid-column: 2 / -1;
  color: var(--fg-faint);
  font-size: .8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --------------------- settings sub-pages --------------------- */

.subtabs { display: flex; gap: .2rem; margin-left: auto; }
.subtab {
  padding: .25rem .55rem;
  border-radius: var(--radius-sm);
  font-size: .78rem;
  color: var(--fg-muted);
}
.subtab:hover { color: var(--fg); }
.subtab[aria-selected="true"] { color: var(--neon); background: color-mix(in oklab, var(--neon) 12%, transparent); }

.subpage {
  max-width: 46rem;
  animation: slideIn var(--slow) var(--ease);
}
.subpage[hidden] { display: none; }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: none; }
}

.field {
  display: block;
  margin-bottom: .85rem;
}
.field > span {
  display: block;
  font-size: .76rem;
  color: var(--fg-muted);
  margin-bottom: .22rem;
}
.field input[type="text"],
.field textarea,
.field select {
  width: 100%;
  padding: .5rem .65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg-elev) 60%, transparent);
  transition: border-color var(--fast) var(--ease);
}
.field input[type="text"]:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--line-solid);
  outline: none;
}
.field textarea { resize: vertical; min-height: 4rem; font-family: var(--mono); font-size: .85rem; }

.field input[type="range"] { width: 100%; accent-color: var(--neon); }
.field output { font-size: .78rem; color: var(--fg-muted); }

.check {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  margin-bottom: .6rem;
  color: var(--fg-muted);
}
.check input { accent-color: var(--neon); }

.row { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: .8rem; }

.keyview {
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.35;
  word-break: break-all;
  padding: .6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  color: var(--fg-muted);
  max-height: 9rem;
  overflow: auto;
  white-space: pre-wrap;
  margin: 0;
}

.contacts { list-style: none; margin: 0 0 .6rem; padding: 0; font-size: .85rem; }
.contacts li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .3rem 0;
  border-bottom: 1px solid var(--line);
}
.contacts .addr { color: var(--fg-muted); font-family: var(--mono); font-size: .78rem; }

/* --------------------- wipe hero --------------------- */

.page--wipe .hero {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: .7rem;
  max-width: 44rem;
}
.hero h1 { font-size: clamp(1.3rem, 3.4vw, 2rem); margin: 0; letter-spacing: -.02em; }
.hero p { margin: 0; color: var(--fg-muted); max-width: 34rem; }

.nuke {
  margin: 1rem 0;
  padding: 1.3rem 2.4rem;
  border-radius: 999px;
  background: #e01f26;
  color: #fff;
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  font-weight: 750;
  letter-spacing: .01em;
  border: 0;
  box-shadow: 0 0 0 0 color-mix(in oklab, #e01f26 60%, transparent);
  transition: transform var(--fast) var(--ease), box-shadow var(--slow) var(--ease), filter var(--fast) var(--ease);
}
.nuke:hover { filter: brightness(1.08); box-shadow: 0 0 0 .5rem color-mix(in oklab, #e01f26 22%, transparent); }
.nuke:active { transform: scale(.97); }

/* --------------------- compose modal --------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: var(--shade);
  backdrop-filter: blur(3px);
  display: grid;
  place-items: start center;
  padding: clamp(.5rem, 3vh, 2rem);
  animation: fade var(--fast) var(--ease);
}
.modal[hidden] { display: none; }
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }

.modal-panel {
  width: min(75%, 74rem);
  height: 100%;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-elev);
  box-shadow: 0 1.5rem 4rem var(--shade);
  overflow: hidden;
  animation: rise var(--slow) var(--ease);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px) scale(.99); }
  to   { opacity: 1; transform: none; }
}

/* address block */
.addr { border-bottom: 1px solid var(--line); }
.addr-row {
  display: grid;
  grid-template-columns: 4.2rem 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.addr-row:last-child { border-bottom: 0; }
.addr-row[hidden] { display: none; }
.addr-row label {
  font-size: .74rem;
  color: var(--fg-faint);
  padding: .5rem .2rem .5rem .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.addr-row input {
  border: 0;
  background: none;
  padding: .55rem .6rem;
  font-size: .95rem;
  min-width: 0;
}
.addr-row input:focus { outline: none; }

/* formatting toolbar */
.format {
  display: flex;
  align-items: center;
  gap: .15rem;
  padding: .3rem .5rem;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.format button {
  min-width: 1.9rem;
  height: 1.9rem;
  border-radius: 6px;
  font-size: .85rem;
  color: var(--fg-muted);
  display: grid;
  place-items: center;
}
.format button:hover { background: color-mix(in oklab, var(--neon) 16%, transparent); color: var(--fg); }
.format button[aria-pressed="true"] { background: var(--neon); color: #0a0a0c; }
.format .sep {
  width: 1px;
  height: 1.1rem;
  background: var(--line);
  margin: 0 .3rem;
}
.format select {
  height: 1.7rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg-elev) 60%, transparent);
  font-size: .76rem;
  padding: 0 .2rem;
}
.format input[type="color"] {
  width: 1.9rem;
  height: 1.7rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: none;
  cursor: pointer;
}

/* the editor: big type, full bleed, no chrome */
.editor {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 4vw, 3rem);
  outline: none;
  font-size: clamp(1.05rem, 2.4vw, 1.4rem);
  line-height: 1.6;
  font-family: var(--ui);
}
.editor:empty::before {
  content: attr(data-ph);
  color: var(--fg-faint);
}
.editor blockquote {
  margin: .6rem 0;
  padding-left: .8rem;
  border-left: 2px solid var(--line-solid);
  color: var(--fg-muted);
}

.compose-foot {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem .7rem;
  border-top: 1px solid var(--line);
}

/* --------------------- emoji picker --------------------- */

.emoji {
  position: absolute;
  z-index: 30;
  width: min(22rem, 84vw);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-solid);
  background: var(--bg-elev);
  box-shadow: 0 .8rem 2rem var(--shade);
  overflow: hidden;
  animation: rise var(--fast) var(--ease);
}
.emoji[hidden] { display: none; }

.emoji-cats {
  display: flex;
  gap: .1rem;
  padding: .3rem;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}
.emoji-cats::-webkit-scrollbar { display: none; }
.emoji-cats button {
  flex: 1 0 auto;
  min-width: 1.7rem;
  height: 1.7rem;
  border-radius: 5px;
  font-size: .9rem;
  opacity: .55;
}
.emoji-cats button:hover { opacity: 1; }
.emoji-cats button[aria-selected="true"] {
  opacity: 1;
  background: color-mix(in oklab, var(--neon) 20%, transparent);
}

.emoji-skin {
  display: flex;
  gap: .2rem;
  padding: .3rem .35rem;
  border-bottom: 1px solid var(--line);
}
.emoji-skin button {
  flex: 1;
  height: 1.5rem;
  border-radius: 5px;
  font-size: .8rem;
  color: var(--fg-muted);
}
.emoji-skin button.on {
  background: color-mix(in oklab, var(--neon) 22%, transparent);
  color: var(--fg);
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: .05rem;
  padding: .35rem;
  max-height: 13rem;
  overflow-y: auto;
}
.emoji-grid button {
  aspect-ratio: 1;
  font-size: 1.1rem;
  border-radius: 5px;
  line-height: 1;
}
.emoji-grid button:hover { background: color-mix(in oklab, var(--neon) 22%, transparent); }

/* --------------------- onboarding: the lone button --------------------- */

.modal--solo { align-items: center; }
.solo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  text-align: center;
  max-width: 26rem;
  padding: 2rem 1rem;
  animation: rise var(--slow) var(--ease);
}
.solo h1 { font-size: 1.6rem; margin: .2rem 0 0; letter-spacing: -.02em; }
.solo p { margin: 0; color: var(--fg-muted); font-size: .9rem; }

.create {
  margin: 1.4rem 0 .6rem;
  padding: 1rem 2rem;
  border-radius: 999px;
  border: 1px solid var(--line-solid);
  background: color-mix(in oklab, var(--neon) 12%, transparent);
  color: var(--fg);
  font-size: 1.05rem;
  font-weight: 620;
  transition: transform var(--fast) var(--ease), box-shadow var(--slow) var(--ease), background var(--fast) var(--ease);
}
.create:hover {
  background: color-mix(in oklab, var(--neon) 24%, transparent);
  box-shadow: 0 0 0 .55rem color-mix(in oklab, var(--neon) 12%, transparent);
}
.create:active { transform: scale(.98); }

.linkbtn {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-size: inherit;
  padding: 0;
}

/* --------------------- validation: transient 4th page --------------------- */

#validate { align-items: center; place-items: center; }
.validate {
  width: min(28rem, 92vw);
  padding: 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--line-solid);
  background: var(--bg-elev);
  box-shadow: 0 1.2rem 3rem var(--shade);
  animation: rise var(--fast) var(--ease);
}
.validate h2 { margin: 0 0 .6rem; font-size: 1.05rem; }
.validate ul { margin: 0 0 1rem; padding-left: 1.1rem; color: var(--fg-muted); font-size: .88rem; }
.validate li { margin-bottom: .3rem; }
.validate li b { color: var(--fg); font-weight: 600; }

/* --------------------- toast --------------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  transform: translateX(-50%);
  z-index: 40;
  padding: .5rem .9rem;
  border-radius: 999px;
  border: 1px solid var(--line-solid);
  background: var(--bg-elev);
  color: var(--fg);
  font-size: .82rem;
  box-shadow: 0 .6rem 1.6rem var(--shade);
  animation: rise var(--fast) var(--ease);
  max-width: 90vw;
  text-align: center;
}
.toast[hidden] { display: none; }

/* --------------------- message reader --------------------- */

.reader {
  grid-column: 1 / -1;
  max-width: 52rem;
}
.reader h2 { font-size: 1.25rem; margin: 0 0 .3rem; letter-spacing: -.01em; }
.reader .meta { color: var(--fg-faint); font-size: .78rem; margin-bottom: 1rem; font-family: var(--mono); }
.reader .body { white-space: pre-wrap; word-break: break-word; font-size: 1rem; line-height: 1.6; }
.reader .acts { display: flex; gap: .4rem; margin-top: 1.2rem; flex-wrap: wrap; }

/* --------------------- responsive --------------------- */

@media (max-width: 720px) {
  .modal-panel { width: 100%; }
  .brand span { display: none; }
  .subtabs { width: 100%; margin-left: 0; }
  .chrome-row--id .pill--quiet { display: none; }
}

@media (max-width: 460px) {
  .tabs { font-size: .82rem; }
  .tab { padding: .4rem .5rem; }
}

/* --------------------- motion & contrast preferences --------------------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-contrast: more) {
  :root {
    --fg-muted: var(--fg);
    --fg-faint: var(--fg-muted);
  }
  #chrome, .field input, .field select, .field textarea { border-color: currentColor; }
}

@media print {
  #chrome, .modal, .toast { display: none !important; }
  body { overflow: visible; }
}