/* Cronlet — blueprint/technical direction (see docs/DESIGN.md). */
:root {
  --bg: #0c1a2b;
  --surface-1: #11263c;
  --surface-2: #17324f;
  --grid-major: #1e3a5c;
  --grid-minor: rgba(78, 201, 224, 0.06);
  --text: #e7f0f6;
  --muted: #8fa9bf;
  --accent: #4ec9e0;
  --amber: #f4b860;
  --success: #5fd6a0;
  --danger: #ff7a7a;

  --r-panel: 10px;
  --r-chip: 6px;
  --r-token: 4px;

  --shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  --hairline: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  --glow: 0 0 0 1px var(--accent), 0 0 18px rgba(78, 201, 224, 0.35);

  --sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --display: "Space Grotesk", var(--sans);
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
}

* {
  box-sizing: border-box;
}

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

body {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px clamp(16px, 4vw, 48px) 32px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Plotted grid background: major lines over a fine minor mesh + vignette. */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size:
    96px 96px,
    96px 96px,
    24px 24px,
    24px 24px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse 120% 90% at 50% 15%, #000 55%, transparent 100%);
}

/* Topbar / wordmark */
.topbar {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.wordmark .tick {
  color: var(--amber);
  padding: 0 1px;
}

.tagline {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
}

/* Main: hero stage, then the reverse builder below it */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Stage: two columns on desktop, stacked on phone */
.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 24px;
  align-items: start;
}

.translator,
.runlog {
  background: linear-gradient(180deg, var(--surface-1), var(--surface-2));
  border: 1px solid var(--grid-major);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow), var(--hairline);
  padding: clamp(16px, 3vw, 32px);
}

.field-label {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* Cron input */
.input-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.input-row .cron-input {
  flex: 1;
  min-width: 0;
}

.copy-btn {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--surface-2);
  border: 1px solid var(--grid-major);
  border-radius: var(--r-chip);
  padding: 0 16px;
  min-height: 44px;
  cursor: pointer;
  transition: box-shadow 160ms ease-out, border-color 160ms ease-out,
    transform 90ms ease-out, background 160ms ease-out;
}

.copy-btn:hover {
  border-color: var(--accent);
  background: var(--surface-1);
}

.copy-btn:focus-visible {
  outline: none;
  box-shadow: var(--glow);
  border-color: var(--accent);
}

.copy-btn:active {
  transform: translateY(1px);
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 1px var(--accent), 0 0 0 rgba(78, 201, 224, 0); }
  40% { box-shadow: 0 0 0 1px var(--accent), 0 0 22px rgba(78, 201, 224, 0.5); }
  100% { box-shadow: 0 0 0 1px transparent, 0 0 0 rgba(78, 201, 224, 0); }
}

.cron-input.pulse {
  animation: pulse-border 600ms ease-out;
}

.cron-input {
  width: 100%;
  font-family: var(--mono);
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  letter-spacing: 0.04em;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--grid-major);
  border-radius: var(--r-chip);
  padding: 14px 16px;
  transition: box-shadow 180ms ease-out, border-color 180ms ease-out;
}

.cron-input:hover {
  border-color: var(--accent);
}

.cron-input:focus-visible {
  outline: none;
  box-shadow: var(--glow);
  border-color: var(--accent);
}

.cron-input.invalid {
  border-color: var(--danger);
}

.cron-error {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--amber);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.cron-input.shake {
  animation: shake 220ms ease-out;
}

/* Field schematic */
.schematic {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 24px 0;
}

.field-col {
  border: 1px solid var(--grid-major);
  border-radius: var(--r-chip);
  padding: 10px 8px 8px;
  background: rgba(12, 26, 43, 0.6);
  min-height: 96px;
  transition: box-shadow 160ms ease-out, border-color 160ms ease-out;
}

.field-col.active {
  box-shadow: var(--glow);
  border-color: var(--accent);
}

.field-col .col-name {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px dashed var(--grid-major);
  padding-bottom: 6px;
  margin-bottom: 8px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--bg);
  background: var(--accent);
  border-radius: var(--r-token);
  padding: 1px 6px;
}

.chip.all {
  color: var(--muted);
  background: transparent;
  border: 1px dashed var(--grid-major);
}

/* Plain-English sentence */
.sentence {
  margin: 8px 0 0;
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.3rem, 3.2vw, 2rem);
  line-height: 1.25;
  max-width: 40ch;
  color: var(--text);
}

/* Run log */
@keyframes roll-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.runlog-list li.roll {
  animation: roll-in 140ms ease-out;
}

.runlog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.runlog-list li {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--grid-major);
}

.runlog-list li .rel {
  color: var(--amber);
}

/* Reverse builder */
.builder {
  background: linear-gradient(180deg, var(--surface-1), var(--surface-2));
  border: 1px solid var(--grid-major);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow), var(--hairline);
  padding: clamp(16px, 3vw, 32px);
}

.builder-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
}

.ctl {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 150px;
  flex: 1 1 160px;
}

.ctl[hidden] {
  display: none;
}

.ctl-name {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* Themed native select — no naked widgets. */
.select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  min-height: 44px;
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--text);
  background-color: var(--bg);
  /* caret drawn as an inline SVG so it inherits the accent */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%234ec9e0' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  border: 1px solid var(--grid-major);
  border-radius: var(--r-chip);
  padding: 10px 36px 10px 14px;
  cursor: pointer;
  transition: box-shadow 160ms ease-out, border-color 160ms ease-out;
}

.select:hover {
  border-color: var(--accent);
}

.select:focus-visible {
  outline: none;
  box-shadow: var(--glow);
  border-color: var(--accent);
}

.select option {
  color: var(--text);
  background: var(--surface-1);
}

.builder-out {
  margin: 20px 0 0;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
}

.mono-inline {
  font-family: var(--mono);
  color: var(--accent);
  background: var(--bg);
  border: 1px solid var(--grid-major);
  border-radius: var(--r-token);
  padding: 2px 8px;
}

/* Learn / SEO section */
.learn {
  max-width: 70ch;
  background: linear-gradient(180deg, var(--surface-1), var(--surface-2));
  border: 1px solid var(--grid-major);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow), var(--hairline);
  padding: clamp(20px, 4vw, 40px);
}

.learn-h {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 32px 0 12px;
}

.learn-h:first-child {
  margin-top: 0;
}

.learn p {
  color: var(--muted);
  margin: 0 0 12px;
}

.learn code {
  font-family: var(--mono);
  font-size: 0.88em;
  color: var(--accent);
  background: var(--bg);
  border: 1px solid var(--grid-major);
  border-radius: var(--r-token);
  padding: 1px 6px;
}

.learn-list {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
}

.learn-list li {
  margin: 6px 0;
}

.faq {
  margin: 0;
}

.faq dt {
  font-family: var(--display);
  font-weight: 500;
  color: var(--text);
  margin-top: 20px;
}

.faq dd {
  margin: 6px 0 0;
  color: var(--muted);
}

.faq em {
  color: var(--amber);
  font-style: normal;
}

/* Footer */
.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 860px) {
  .stage {
    grid-template-columns: 1fr;
  }
}

/* Phone: keep the five-field schematic legible and the columns from crowding. */
@media (max-width: 480px) {
  .schematic {
    gap: 4px;
    margin: 16px 0;
  }
  .field-col {
    padding: 8px 5px 6px;
    min-height: 84px;
  }
  .field-col .col-name {
    font-size: 0.55rem;
    letter-spacing: 0.04em;
  }
  .chip,
  .chip.all {
    font-size: 0.66rem;
    padding: 1px 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}