/* ==================================================================
   CalLink — Add to Calendar Link Generator
   Aesthetic: precision instrument. Warm paper, deep evergreen ink,
   signal-orange accents, mono microcopy, dark "terminal" output.
   No external fonts (fully self-contained).
   ================================================================== */

:root {
  --paper: #f3efe5;
  --paper-deep: #eae4d5;
  --panel: #fbf9f2;
  --ink: #1b241f;
  --ink-soft: #47524b;
  --line: #d4cdba;
  --line-strong: #b8b09a;
  --accent: #e0491f;
  --accent-deep: #b53a16;
  --dark: #1b241f;
  --dark-2: #232e28;
  --dark-line: #37453d;
  --dark-text: #e9e5d8;
  --dark-dim: #9aa89f;
  --ok: #3fae7a;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: Seravek, "Gill Sans Nova", "Gill Sans", "Avenir Next", Avenir, "Trebuchet MS", Verdana, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  /* faint engineering-grid texture */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 36px 36px;
  background-position: -1px -1px;
  line-height: 1.55;
  font-size: 16px;
}

.mono { font-family: var(--mono); }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent-deep); }

/* ------------------------------------------------------------------
   Header
   ------------------------------------------------------------------ */
.site-header {
  border-bottom: 1px solid var(--line-strong);
  border-top: 4px solid var(--accent);
  background: var(--panel);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.wordmark-icon { color: var(--ink); flex: none; }

.header-flags {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------ */
.hero { padding: 64px 0 40px; }

.kicker {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--accent-deep);
  margin-bottom: 18px;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 700;
  max-width: 14ch;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  margin-top: 20px;
  max-width: 58ch;
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.hero-sub strong { color: var(--ink); }

/* ------------------------------------------------------------------
   App grid
   ------------------------------------------------------------------ */
.app-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 28px;
  align-items: start;
  padding-top: 8px;
  padding-bottom: 72px;
}

@media (max-width: 900px) {
  .app-grid { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  box-shadow: 6px 6px 0 rgba(27, 36, 31, 0.08);
}

.card-heading {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  font-weight: 600;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------
   Form
   ------------------------------------------------------------------ */
.form-card form { padding: 22px; }

.field { margin-bottom: 18px; min-width: 0; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.req { color: var(--accent); }

.field input[type="text"],
.field input[type="date"],
.field input[type="time"],
.field select,
.field textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 10px 12px;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.field textarea { resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 3px 3px 0 rgba(224, 73, 31, 0.25);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 420px) {
  .field-row { grid-template-columns: 1fr; gap: 0; }
}

.checkbox-label {
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-transform: none !important;
  font-size: 0.85rem !important;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

body.allday .time-field { display: none; }

.hint {
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--accent-deep);
  line-height: 1.5;
}

.form-errors {
  border: 1px solid var(--accent);
  background: rgba(224, 73, 31, 0.07);
  color: var(--accent-deep);
  font-size: 0.85rem;
  padding: 10px 14px;
  white-space: pre-line;
}

/* ------------------------------------------------------------------
   Output panel (dark)
   ------------------------------------------------------------------ */
.output-card {
  background: var(--dark);
  border-color: var(--dark);
  position: sticky;
  top: 20px;
}

.output-card .card-heading {
  color: var(--dark-dim);
  border-bottom-color: var(--dark-line);
}

.output-body { padding: 10px 22px 22px; }

.out-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--dark-line);
}

.out-meta { min-width: 0; }

.out-name {
  display: block;
  color: var(--dark-text);
  font-weight: 600;
  font-size: 0.92rem;
}

.out-url {
  display: block;
  color: var(--dark-dim);
  font-size: 0.7rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  margin-top: 2px;
}

.out-actions { display: flex; gap: 8px; flex: none; }

.btn-copy,
.btn-ghost {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  cursor: pointer;
  text-decoration: none;
  border-radius: 0;
  transition: background 0.12s, color 0.12s, transform 0.08s;
  display: inline-block;
}

.btn-copy {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.btn-copy:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn-copy:active { transform: translate(1px, 1px); }

.btn-copy.copied {
  background: var(--ok);
  border-color: var(--ok);
}

.btn-ghost {
  background: transparent;
  color: var(--dark-text);
  border: 1px solid var(--dark-line);
}

.btn-ghost:hover { border-color: var(--dark-dim); color: #fff; }

/* Embed block */
.embed-block { padding-top: 18px; }

.embed-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.embed-tag { color: var(--accent); font-size: 0.72rem; font-weight: 400; }

.embed-note {
  color: var(--dark-dim);
  font-size: 0.68rem;
  margin: 4px 0 10px;
}

.embed-code {
  background: var(--dark-2);
  border: 1px solid var(--dark-line);
  color: var(--dark-text);
  font-size: 0.68rem;
  line-height: 1.6;
  padding: 12px 14px;
  max-height: 180px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.embed-preview {
  margin-top: 12px;
  background: var(--paper);
  border: 1px dashed var(--line-strong);
  padding: 16px;
}

.preview-label {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

/* ------------------------------------------------------------------
   Content sections (How it works / FAQ)
   ------------------------------------------------------------------ */
.content-section {
  border-top: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 64px 0;
}

.faq-section { background: var(--paper-deep); }

.section-heading {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  letter-spacing: -0.01em;
  margin-bottom: 34px;
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 800px) {
  .steps { grid-template-columns: 1fr; }
}

.steps li {
  border-top: 3px solid var(--ink);
  padding-top: 16px;
}

.step-num {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent-deep);
  border: 1px solid var(--accent-deep);
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  margin-bottom: 12px;
}

.steps h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.steps p { color: var(--ink-soft); font-size: 0.93rem; }

.privacy-note {
  margin-top: 40px;
  border-left: 4px solid var(--accent);
  padding: 12px 18px;
  background: var(--paper);
  color: var(--ink-soft);
  font-size: 0.93rem;
  max-width: 72ch;
}

.privacy-note strong { color: var(--ink); }

/* FAQ */
.faq {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.02rem;
  position: relative;
  padding-right: 48px;
  user-select: none;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--accent);
}

.faq[open] summary::after { content: "\2212"; }

.faq[open] summary { border-bottom: 1px solid var(--line); }

.faq p {
  padding: 16px 20px 20px;
  color: var(--ink-soft);
  font-size: 0.94rem;
  max-width: 80ch;
}

.faq .mono { font-size: 0.83em; background: var(--paper-deep); padding: 1px 5px; }

/* ------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------ */
.site-footer {
  background: var(--dark);
  color: var(--dark-dim);
  padding: 28px 0;
  border-top: 4px solid var(--accent);
}

.footer-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.footer-inner .mono { color: var(--dark-text); }

.footer-fine { font-size: 0.65rem; letter-spacing: 0.14em; }