/* Design language carried over from simonsure.com: hairline box grid,
   Space Grotesk for text, Space Mono for labels and dates. */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #fff;
  --color-text: #0a0a0a;
  --color-muted: #888;
  --color-border: #d0d0d0;
  --color-faint: #f4f4f4;
  --color-alert: #b4341f;
  --font: "Space Grotesk", sans-serif;
  --font-mono: "Space Mono", monospace;
}

html {
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ---- HEADER ---- */

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 2.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
}

.header-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

nav.tabs {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}

nav.tabs button {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: none;
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  padding: 0.2rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

nav.tabs button:hover {
  color: var(--color-text);
}

nav.tabs button[aria-current="true"] {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

/* ---- GRID + BOX ---- */

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0 2.5rem 2.5rem;
}

.box {
  border: 1px solid var(--color-border);
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
  text-decoration: none;
  color: var(--color-text);
  margin-top: -1px;
  margin-left: -1px;
  grid-column: span 4;
}

.box-half {
  grid-column: span 2;
}

.box-quarter {
  grid-column: span 1;
  min-height: 150px;
  justify-content: space-between;
}

.box-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.box-label.alert {
  color: var(--color-alert);
}

.box-footer {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  margin-top: 1.5rem;
  text-transform: uppercase;
}

h1 {
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

h2 {
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.big-text {
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.muted {
  color: var(--color-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.empty {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ---- STAT ---- */

.stat-value {
  font-size: 2.4rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-value.alert {
  color: var(--color-alert);
}

/* ---- VERTICAL TIMELINE ---- */

.timeline {
  display: flex;
  flex-direction: column;
}

.tl-row {
  display: grid;
  grid-template-columns: 9rem 1px 1fr;
  align-items: stretch;
}

.tl-when {
  text-align: right;
  padding: 0 1.6rem 2.6rem 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.tl-when .tl-date {
  color: var(--color-text);
  display: block;
}

.tl-when .tl-rel {
  color: var(--color-muted);
  font-size: 0.62rem;
  display: block;
  margin-top: 0.25rem;
}

.tl-rail {
  background: var(--color-border);
  position: relative;
}

.tl-dot {
  position: absolute;
  top: 0.35rem;
  left: -4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1px solid var(--color-text);
}

.tl-body {
  padding: 0 0 2.6rem 1.6rem;
}

.tl-title {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.4;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.tl-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.tl-title a:hover {
  border-bottom-color: var(--color-text);
}

.tl-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-top: 0.4rem;
}

.tl-papers {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.tl-paper {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-size: 0.88rem;
  line-height: 1.45;
}

.tl-none {
  margin-top: 0.7rem;
  font-size: 0.8rem;
  color: var(--color-border);
}

/* Past deadlines recede but stay legible. */
.tl-row.is-past .tl-when .tl-date,
.tl-row.is-past .tl-title,
.tl-row.is-past .tl-paper {
  color: var(--color-muted);
}

.tl-row.is-past .tl-dot {
  background: var(--color-border);
  border-color: var(--color-border);
}

.tl-row.is-urgent .tl-dot {
  background: var(--color-alert);
  border-color: var(--color-alert);
}

.tl-row.is-urgent .tl-when .tl-rel {
  color: var(--color-alert);
}

/* The "now" marker sits between past and future rows. */
.tl-now .tl-when {
  padding-bottom: 2.6rem;
  color: var(--color-alert);
}

.tl-now .tl-rail {
  background: var(--color-alert);
}

.tl-now .tl-body {
  padding-bottom: 2.6rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-alert);
}

/* ---- TAGS ---- */

.tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid var(--color-border);
  padding: 0.16rem 0.42rem;
  color: var(--color-muted);
  white-space: nowrap;
  border-radius: 2px;
}

.tag.solid {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

.tag.alert {
  border-color: var(--color-alert);
  color: var(--color-alert);
}

/* ---- LIST ROWS ---- */

.rows {
  display: flex;
  flex-direction: column;
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.row:last-child {
  border-bottom: none;
}

.row-main {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 12rem;
  flex: 1;
}

.row-title {
  font-weight: 500;
  font-size: 1rem;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.row-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.row-actions {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}

/* ---- BUTTONS ---- */

button,
.btn {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.btn {
  border: 1px solid var(--color-text);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 0.6rem 1.1rem;
  transition: background 0.2s, color 0.2s;
  display: inline-block;
  text-decoration: none;
}

.btn:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn.primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn.primary:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.link-btn {
  background: none;
  border: none;
  color: var(--color-muted);
  padding: 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.link-btn:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

.link-btn.danger:hover {
  color: var(--color-alert);
  border-bottom-color: var(--color-alert);
}

/* ---- FORMS ---- */

.form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem 1.2rem;
  align-items: end;
}

.form.stacked {
  grid-template-columns: 1fr;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field.wide {
  grid-column: 1 / -1;
}

.field label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.field input,
.field select,
.field textarea {
  font-family: var(--font);
  font-size: 0.92rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.45rem 0;
  border-radius: 0;
  width: 100%;
  transition: border-color 0.2s;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--color-text);
}

.field textarea {
  resize: vertical;
  min-height: 3.5rem;
  line-height: 1.55;
}

.form-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  grid-column: 1 / -1;
  margin-top: 0.4rem;
}

details.adder {
  border-top: 1px solid var(--color-border);
  padding-top: 1.4rem;
  margin-top: 1.4rem;
}

details.adder > summary {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  cursor: pointer;
  list-style: none;
}

details.adder > summary::-webkit-details-marker {
  display: none;
}

details.adder > summary::before {
  content: "+ ";
}

details.adder[open] > summary::before {
  content: "− ";
}

details.adder > summary:hover {
  color: var(--color-text);
}

details.adder > .form {
  margin-top: 1.4rem;
}

/* ---- STALE VENUE CARD ---- */

.stale {
  border: 1px solid var(--color-alert);
  padding: 1.6rem;
  margin-bottom: -1px;
}

.stale-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.stale-name {
  font-size: 1.05rem;
  font-weight: 500;
}

.stale-note {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-alert);
}

/* ---- SIGN-IN PAGES ---- */

.center-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.center-card {
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  width: 100%;
  max-width: 480px;
}

.center-card h1 {
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
}

.center-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-muted);
  margin-bottom: 1.6rem;
}

/* Sign-in has no body copy, so the button takes over that breathing room. */
.center-card h1 + .btn {
  margin-top: 0.8rem;
}

.notice {
  font-size: 0.82rem;
  line-height: 1.55;
  margin-top: 1.2rem;
  min-height: 1.2rem;
}

.notice.error {
  color: var(--color-alert);
}

.notice.ok {
  color: var(--color-text);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 0.75rem 1.2rem;
  z-index: 100;
  max-width: calc(100vw - 3rem);
}

.toast.error {
  background: var(--color-alert);
}

[hidden] {
  display: none !important;
}

/* ---- RESPONSIVE ---- */

@media (max-width: 1024px) {
  header {
    padding: 1.5rem;
  }

  .grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 0 1.5rem 1.5rem;
  }

  .box {
    grid-column: span 2;
    padding: 1.8rem;
  }

  .box-half {
    grid-column: span 2;
  }

  .box-quarter {
    grid-column: span 1;
  }
}

@media (max-width: 600px) {
  /* Logo and date share the first line; the tabs get a full row of their own
     instead of wrapping one item at a time. */
  header {
    padding: 1.2rem 1rem;
    justify-content: space-between;
    row-gap: 1.1rem;
  }

  header .logo {
    order: 1;
  }

  header .header-tag {
    order: 2;
  }

  nav.tabs {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 0.6rem;
  }

  .grid {
    grid-template-columns: 1fr;
    padding: 0 1rem 1rem;
  }

  .box,
  .box-half,
  .box-quarter {
    grid-column: span 1;
    padding: 1.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .tl-row {
    grid-template-columns: 5.6rem 1px 1fr;
  }

  .tl-when {
    padding-right: 1rem;
  }

  .tl-body {
    padding-left: 1rem;
  }
}