/* ── SM Meetup visual system ──────────────────────────────────────────────
   Collegiate: deep navy + gold on warm paper. Hairline borders, sharp
   corners (rounded only where something must read as a dot or tag).
   Space Grotesk for UI text; IBM Plex Mono for dates, times, and labels.
   No gradients, no glows; shadows only where something actually floats. */

:root {
  --paper: #f2f0ea;
  --panel: #ffffff;
  --panel-dim: #faf9f4;
  --line: #d9d6cb;
  --line-strong: #b6b2a3;
  --ink: #1b2331;
  --dim: #6f6c60;

  --navy: #16294d;
  --navy-dark: #0e1c38;
  --navy-pale: #e7ebf2;
  --gold: #c19a2e;
  --gold-pale: #f3ead0;
  --gold-ink: #6f5713;
  --red: #a63d33;
  --red-pale: #f4e1de;
  --green: #3f7d4e;
  --green-pale: #e2eee1;

  --font-ui: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.45;
  background: var(--paper);
  color: var(--ink);
}
[hidden] { display: none !important; }
::selection { background: var(--gold-pale); }

h1, h2, h3 { font-family: var(--font-ui); }

button { font-family: inherit; }
input, select, textarea { font-family: inherit; }

:focus-visible { outline: 2px solid var(--navy); outline-offset: -1px; }

/* ── generic bits ─────────────────────────────────────────────────────── */

.btn {
  font-size: 13px; font-weight: 500;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}
.btn:hover { border-color: var(--navy); color: var(--navy); }
.btn.primary {
  background: var(--navy); border-color: var(--navy); color: #fff;
  font-weight: 700; letter-spacing: .02em;
}
.btn.primary:hover { background: var(--navy-dark); color: #fff; }
.btn.danger { color: var(--red); border-color: var(--red); background: var(--panel); }
.btn.danger:hover { background: var(--red-pale); }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.icon { padding: 2px 9px; font-size: 16px; line-height: 1.3; }
.btn:disabled { opacity: .5; cursor: default; }

.linklike {
  background: none; border: none; padding: 0;
  color: var(--navy); font: inherit; font-weight: 500;
  cursor: pointer; text-align: left;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
}
.linklike:hover { text-decoration-color: var(--gold); }
.linklike.danger { color: var(--red); font-size: 12px; margin-left: 8px; }

.error {
  background: var(--red-pale);
  border-left: 3px solid var(--red);
  color: #7c2d24;
  padding: 8px 10px;
  margin-bottom: 10px;
  font-size: 13px;
}
.hint { color: var(--dim); font-size: 13px; margin: 4px 0; }
.ok { color: var(--green); font-weight: 700; margin: 0 0 4px; }

.badge {
  background: var(--navy); color: #fff;
  font-family: var(--font-mono);
  font-size: 9px; font-weight: 600; letter-spacing: .08em;
  padding: 2px 6px;
}

.btn-row { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.spacer { flex: 1; }

/* ── full-page screens (config / auth / verify / setup) ───────────────── */

.screen {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-top: 4px solid var(--navy);
  padding: 32px;
  width: min(460px, 94vw);
}
.card h1 { margin: 0 0 4px; font-size: 24px; font-weight: 700; letter-spacing: -.01em; }
.tagline { margin: 0 0 20px; color: var(--dim); font-size: 14px; }
.setup-steps { padding-left: 20px; margin: 0 0 12px; }
.setup-steps li { margin-bottom: 8px; }
code {
  font-family: var(--font-mono); font-size: .92em;
  background: var(--paper); padding: 1px 5px;
}

.card form > label { display: block; margin-bottom: 14px; font-size: 13px; font-weight: 700; }
.card form input, .card form select {
  display: block; width: 100%;
  margin-top: 5px; padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--panel);
  font-size: 14px; font-weight: 400;
}
.card fieldset {
  border: 1px solid var(--line);
  margin: 0 0 14px; padding: 10px 12px;
}
.card legend {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--dim);
  padding: 0 5px;
}
.contact-row { display: flex; gap: 8px; }
.contact-row select { width: 140px; flex: none; margin-top: 0 !important; }
.contact-row input { flex: 1; margin-top: 0 !important; }
.auth-links { display: flex; justify-content: space-between; gap: 10px; margin: 16px 0 0; flex-wrap: wrap; }

/* ── top bar ──────────────────────────────────────────────────────────── */

#topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 2px solid var(--navy);
  flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 8px; }
.brand-mark {
  background: var(--navy); color: #fff;
  font-weight: 700; font-size: 15px; letter-spacing: .02em;
  padding: 3px 7px;
  border-bottom: 3px solid var(--gold);
}
.brand-name {
  font-weight: 700; font-size: 17px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--navy);
}
.month-nav { display: flex; align-items: center; gap: 6px; }
#month-label {
  font-family: var(--font-mono);
  font-weight: 600; font-size: 14px;
  min-width: 132px; text-align: center;
  text-transform: uppercase; letter-spacing: .04em;
}

.grade-filter { display: flex; gap: 0; align-items: center; }
.grade-filter .hint { margin-right: 8px; }
.check {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 500; cursor: pointer;
}
.check input { width: auto !important; margin: 0; display: inline-block !important; }
.check.pill {
  border: 1px solid var(--line-strong);
  margin-left: -1px;               /* collapse into a segmented control */
  padding: 3px 11px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  background: var(--panel);
  user-select: none;
}
.check.pill input { position: absolute; opacity: 0; pointer-events: none; }
.check.pill:has(input:checked) {
  background: var(--navy); border-color: var(--navy); color: #fff;
  position: relative; z-index: 1;
}

.count-badge {
  background: var(--red); color: #fff;
  border-radius: 999px;             /* a badge must read as a dot */
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600;
  padding: 1px 7px; margin-left: 2px;
}
.notice {
  background: var(--gold-pale);
  color: var(--gold-ink);
  border-bottom: 1px solid var(--gold);
  padding: 8px 18px; font-size: 13px;
}

/* ── layout: sidebar LEFT, calendar right ─────────────────────────────── */

#layout { display: flex; height: calc(100vh - 59px); }
#sidebar {
  order: -1;
  width: 400px; flex: none;
  border-right: 1px solid var(--line-strong);
  background: var(--panel);
  overflow-y: auto;
}
#calendar {
  flex: 1; padding: 14px; overflow: auto; min-width: 0;
  display: flex;                     /* lets the grid stretch to full height */
}

/* ── calendar grid ────────────────────────────────────────────────────── */

.cal-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  /* rows share all available height; scroll only when the window is short */
  grid-template-rows: auto repeat(6, minmax(92px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-strong);
}
.cal-wd {
  background: var(--panel);
  padding: 6px;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim); text-align: center;
}
.cal-cell {
  background: var(--panel);
  padding: 4px;
  display: flex; flex-direction: column; gap: 3px;
  cursor: pointer;
  min-width: 0;
  container-type: size;   /* chips adapt their detail to real cell size */
  overflow: hidden;
}
.cal-cell:hover { background: var(--panel-dim); }
.cal-cell.out { background: var(--panel-dim); }
.cal-cell.out .cal-daynum { color: var(--line-strong); }
.cal-daynum {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
}
.cal-cell.today .cal-daynum { background: var(--navy); color: #fff; font-weight: 600; }

.chip {
  display: block; width: 100%;
  border: none;
  border-left: 3px solid var(--navy);
  background: var(--navy-pale);
  color: var(--navy);
  padding: 3px 6px;
  font: inherit; font-size: 12px; text-align: left;
  cursor: pointer;
  overflow: hidden;
  flex: none;
}
.chip:hover { background: #dde3ee; }
.chip.active { outline: 2px solid var(--navy); outline-offset: -1px; }
.chip-time {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600;
  margin-right: 5px;
}
.chip-line {
  display: block;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chip-name { font-weight: 500; }
.chip-sub {
  display: block;
  font-size: 11px; opacity: .85;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chip-mono { font-family: var(--font-mono); font-size: 10px; }

/* a lone activity gets a card-like chip with a wrapping title */
.chip.detail-full { padding: 5px 7px; }
.chip.detail-full .chip-name {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-weight: 700; font-size: 13px; line-height: 1.25;
}

/* short cells shed detail lines so everything still fits */
@container (max-height: 128px) { .chip .chip-sub2 { display: none; } }
@container (max-height: 100px) {
  .chip .chip-sub { display: none; }
  .chip.detail-full .chip-name {
    display: block; -webkit-line-clamp: unset;
    white-space: nowrap; text-overflow: ellipsis;
    font-size: 12px;
  }
}

.chip-more {
  border: none; background: none;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .06em;
  color: var(--dim);
  text-align: left; padding: 1px 6px;
  cursor: pointer;
  flex: none;
}
.chip-more:hover { color: var(--navy); text-decoration: underline; }
.chip.past { opacity: .42; filter: grayscale(.6); }
.chip.private {
  border-left-color: var(--gold);
  background: var(--gold-pale);
  color: var(--gold-ink);
}
.chip.private:hover { background: #ecdfba; }
.chip.invite { outline: 2px dashed var(--gold); outline-offset: -2px; }

/* ── sidebar panels ───────────────────────────────────────────────────── */

.side-empty { padding: 40px 24px; color: var(--dim); text-align: center; }
.side-panel { padding: 18px; }
.side-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 10px; margin-bottom: 14px;
}
.side-head h2 {
  margin: 0; font-size: 19px; font-weight: 700; letter-spacing: -.01em;
  overflow-wrap: anywhere;
}

.meta { display: flex; flex-direction: column; gap: 7px; margin-bottom: 12px; }
.meta-row { display: flex; gap: 10px; font-size: 13px; }
.meta-label {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
  width: 96px; flex: none;
  padding-top: 2px;
}
.meta-value { min-width: 0; overflow-wrap: anywhere; }
.desc { font-size: 13.5px; white-space: pre-wrap; overflow-wrap: anywhere; }

.side-panel section { margin-top: 20px; }
.side-panel section h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--dim);
  border-bottom: 1px solid var(--line);
  padding-bottom: 5px;
}

.join-block {
  margin-top: 14px; padding: 12px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--navy);
  display: flex; flex-direction: column; gap: 8px; align-items: flex-start;
}
.join-block p { margin: 0; }

.people { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; }
.person-row { display: flex; align-items: center; gap: 8px; }

.host-panel { border-top: none; }
.request-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.request-row .linklike { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.host-panel > .btn.danger { margin-top: 10px; }

.contact-line { margin: 5px 0; font-size: 13.5px; overflow-wrap: anywhere; }

.ended-banner {
  background: var(--panel-dim);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  color: var(--dim);
  padding: 8px 10px; margin-bottom: 12px; font-size: 12.5px;
}

/* ── chat: a flat log, not bubbles ────────────────────────────────────── */

.chat-log {
  border: 1px solid var(--line);
  padding: 10px;
  height: 260px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
  background: var(--panel-dim);
}
.msg {
  border-left: 2px solid var(--line-strong);
  padding: 1px 0 2px 10px;
  max-width: 100%;
}
.msg.mine { border-left-color: var(--navy); }
.msg.host { border-left-color: var(--gold); }
.msg-head {
  display: flex; gap: 7px; align-items: baseline;
  font-size: 11px; color: var(--dim);
}
.msg-name { font-weight: 700; color: var(--ink); font-size: 12px; }
.msg-time { margin-left: auto; padding-left: 8px; font-family: var(--font-mono); font-size: 10px; }
.msg-text { font-size: 13.5px; white-space: pre-wrap; word-break: break-word; }
.chat-input-row { display: flex; gap: 8px; margin-top: 8px; }
.chat-input-row input {
  flex: 1; padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  font-size: 13.5px;
}

/* ── create form ──────────────────────────────────────────────────────── */

.create-form .field { margin-bottom: 15px; }
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 5px;
}
.create-form input, .create-form textarea, .create-form select {
  width: 100%; padding: 7px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--panel);
  font-size: 13.5px;
}
.create-form textarea { resize: vertical; }
.date-add-row { display: flex; gap: 8px; }
.date-add-row input { flex: 1; }
.date-add-row .btn { flex: none; }
.date-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.date-pill {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: 2px 8px;
  font-family: var(--font-mono); font-size: 12px;
  display: inline-flex; gap: 7px; align-items: center;
}
.time-row { display: flex; gap: 8px; align-items: center; }
.time-row input { flex: 1; }
.time-row .hint { margin: 0; flex: none; }
.check-row { display: flex; gap: 14px; flex-wrap: wrap; }
.radio-col { display: flex; flex-direction: column; gap: 7px; }

/* ── group-availability heat (planning private activities) ────────────── */

.cal-cell.heat-0 { background: var(--panel); }
.cal-cell.heat-1 { background: #edeeda; }
.cal-cell.heat-2 { background: #dfe8cf; }
.cal-cell.heat-3 { background: #c9dfc0; }
.cal-cell.heat-4 { background: #aed3a6; }
.heat-mode .cal-cell { cursor: crosshair; }
.heat-label {
  font-family: var(--font-mono);
  font-size: 9px; font-weight: 600;
  color: #2c5236;
}
.cal-cell.out .heat-label { opacity: .6; }

.breakdown { margin-top: 8px; }
.slot-row {
  display: flex; align-items: center; gap: 8px;
  width: 100%; margin-bottom: 3px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 4px 8px; font: inherit; font-size: 12px;
  cursor: pointer;
}
.slot-row:hover { border-color: var(--navy); }
.slot-time {
  width: 48px; flex: none; text-align: right;
  font-family: var(--font-mono); font-size: 11px; color: var(--dim);
}
.slot-count {
  width: 72px; flex: none; text-align: right;
  font-family: var(--font-mono); font-size: 11px; color: var(--dim);
}
.slot-bar {
  flex: 1; display: flex; height: 10px;
  overflow: hidden; background: var(--paper);
}
.bar-free { background: #6aa876; }
.bar-maybe { background: var(--line); }
.bar-busy { background: #c97a72; }

.friend-picker { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.friend-picker .hint { width: 100%; }

/* ── availability-marking mode on the calendar ────────────────────────── */

.cal-grid.avail-mode .cal-cell { cursor: pointer; }
.cal-cell.avl-free { background: var(--green-pale); }
.cal-cell.avl-busy { background: var(--red-pale); }
.cal-cell.avl-mixed {
  background: repeating-linear-gradient(135deg,
    var(--green-pale) 0 10px, var(--red-pale) 10px 20px);
}
.cal-cell.avl-maybe { background: var(--panel); }

.hour-list { display: flex; flex-direction: column; gap: 3px; }
.hour-row {
  display: flex; justify-content: space-between; align-items: center;
  width: 100%;
  border: 1px solid var(--line);
  background: var(--panel-dim);
  padding: 4px 10px;
  font: inherit; font-size: 12px;
  cursor: pointer;
}
.hour-row:hover { border-color: var(--navy); }
.hour-row.st-free { background: var(--green-pale); }
.hour-row.st-busy { background: var(--red-pale); }
.hour-row.inherit .hour-status { color: var(--dim); font-weight: 500; }
.hour-row > span:first-child { font-family: var(--font-mono); font-size: 11px; }
.hour-status {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase;
}

#avail-btn { position: relative; }
#avail-btn.nudge::after {
  content: "";
  position: absolute; top: -4px; right: -4px;
  width: 9px; height: 9px;
  border-radius: 50%;               /* a dot must be a dot */
  background: var(--red);
  animation: nudge-pulse 1.6s infinite;
}
@keyframes nudge-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: .55; }
}
.error-text { color: var(--red) !important; }

/* ── availability editor overlay (weekly schedule) ────────────────────── */

.overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(14, 20, 34, .5);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.overlay-panel {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-top: 4px solid var(--navy);
  padding: 20px 22px;
  width: min(820px, 96vw);
  max-height: 94vh; overflow-y: auto;
}
.overlay-panel h2 { font-size: 19px; margin: 0; }
.avail-toolbar {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap; margin: 12px 0;
}
.btn.brush.selected { outline: 2px solid var(--navy); outline-offset: -1px; }
.btn.brush.b-free { background: var(--green-pale); }
.btn.brush.b-busy { background: var(--red-pale); }

.avail-grid {
  display: grid;
  grid-template-columns: 56px repeat(7, 1fr);
  gap: 2px;
  user-select: none;
}
.avail-grid .hd {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim); text-align: center; padding: 3px 0;
}
.avail-grid .hr {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--dim);
  text-align: right; padding-right: 8px; align-self: center;
}
.avail-cell { height: 21px; background: #eceae2; cursor: pointer; }
.avail-cell:hover { outline: 1px solid var(--navy); }
.avail-cell.st-free { background: #74b184; }
.avail-cell.st-busy { background: #cd7d74; }
.avail-cell.st-maybe { background: #eceae2; }
.avail-cell.st-mixed {
  background: repeating-linear-gradient(135deg, #74b184 0 5px, #cd7d74 5px 10px);
}
.avail-cell.inherit { opacity: .45; }
.avail-cell.demo {
  display: inline-block; width: 16px; height: 12px;
  cursor: default; vertical-align: baseline; margin: 0 2px;
}
.avail-legend { margin: 12px 0 4px; }

.friend-action { display: inline-flex; align-items: center; gap: 8px; }
.small-note { font-size: 12.5px; }
.person-tools { margin: 8px 0; }
.search-results { margin-top: 10px; }

/* ── one-day list (from a crowded day's "+N more") ────────────────────── */

.day-list { display: flex; flex-direction: column; gap: 4px; }
.day-row {
  display: flex; gap: 10px; align-items: flex-start;
  width: 100%;
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy);
  background: var(--panel);
  padding: 7px 9px;
  font: inherit; font-size: 13px; text-align: left;
  cursor: pointer;
}
.day-row:hover { background: var(--panel-dim); border-color: var(--navy); }
.day-row.private { border-left-color: var(--gold); }
.day-row-time {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600;
  width: 56px; flex: none; text-align: right;
  padding-top: 2px; color: var(--dim);
}
.day-row-main { min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.day-row-main b { overflow-wrap: anywhere; }
.day-row-sub { font-size: 12px; color: var(--dim); overflow-wrap: anywhere; }

/* ── small screens ────────────────────────────────────────────────────── */

@media (max-width: 880px) {
  #layout { flex-direction: column; height: auto; }
  #sidebar {
    order: 0;                       /* calendar first when stacked */
    width: 100%;
    border-right: none;
    border-top: 2px solid var(--navy);
  }
  .cal-grid { grid-template-rows: auto repeat(6, minmax(80px, auto)); }
  #month-label { min-width: 0; }
}