/* Rotocopter & KI — dark editorial theme (frontendstyle.md) */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400&display=swap');

:root {
  --c-bg:        #222222;
  --c-surface:   #264653;
  --c-border:    #2e5a6a;
  --c-accent:    #2a9d8f;
  --c-gold:      #e9c46a;
  --c-orange:    #f4a261;
  --c-terra:     #e76f51;
  --c-text:      #c4bfb9;

  --pad:         16px;
  --tap:         48px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);

  --font-sans: 'EB Garamond', Palatino, "Book Antiqua", Georgia, serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SFMono-Regular', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1, "onum" 1;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Topbar --------------------------------------------------- */
.topbar {
  background: var(--c-surface);
  color: var(--c-gold);
  padding: 10px 16px;
  padding-top: calc(10px + env(safe-area-inset-top));
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--c-border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}
.brand {
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--c-gold);
  text-decoration: none;
  cursor: pointer;
}
.group-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-terra);
  background: rgba(255,255,255,0.06);
  padding: 4px 10px;
}
.round-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  background: var(--c-accent);
  padding: 4px 10px;
}
.topbar-contact {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-text);
  text-decoration: none;
  padding: 4px 10px;
  border: 1px solid var(--c-border);
  transition: color 0.15s, border-color 0.15s;
}
.topbar-contact:hover {
  color: var(--c-gold);
  border-color: var(--c-gold);
}

/* ---------- Main / screens ------------------------------------------- */
main {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 18px 16px 40px;
}

.screen {
  animation: fadeSlideIn 0.7s ease-out;
}
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

h1 {
  font-size: 28px;
  font-weight: 400;
  color: var(--c-gold);
  margin: 8px 0 10px;
  letter-spacing: -0.01em;
}
h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--c-gold);
  margin: 4px 0 14px;
}
h3 {
  font-size: 18px;
  font-weight: 500;
  color: var(--c-gold);
  margin: 22px 0 10px;
}
h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-terra);
  margin: 14px 0 8px;
}

.lede {
  color: var(--c-text);
  font-size: 16px;
  margin: 0 0 18px;
}
.lede strong {
  color: var(--c-gold);
}
.hint {
  font-family: var(--font-mono);
  color: var(--c-terra);
  font-size: 12px;
  margin: 6px 0 12px;
}

/* ---------- Setup screen --------------------------------------------- */
.setup-hero {
  display: flex;
  justify-content: center;
  padding: 10px 0 0;
}
.setup-hero .plane-svg {
  width: 200px;
  height: auto;
  opacity: 0.7;
}

.setup-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0 0 22px;
}
.setup-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
}
.setup-step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-bg);
  background: var(--c-accent);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 22px;
}
.setup-step-text {
  font-size: 14px;
  color: var(--c-text);
}
.setup-step-text strong {
  color: var(--c-gold);
}

.setup-quote {
  margin-top: 22px;
  font-style: italic;
  color: var(--c-text);
  opacity: 0.6;
  font-size: 14px;
  text-align: center;
}
.setup-quote-src {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* ---------- Card ----------------------------------------------------- */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: var(--pad);
}

.label {
  display: block;
  font-weight: 500;
  color: var(--c-gold);
  margin-bottom: 8px;
}
input[type="text"],
input[type="number"] {
  width: 100%;
  min-height: var(--tap);
  padding: 10px 12px;
  font-size: 17px;
  font-family: var(--font-sans);
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-gold);
  -webkit-appearance: none;
  appearance: none;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}
input::placeholder {
  color: var(--c-terra);
  opacity: 0.6;
}
input:focus {
  outline: none;
  box-shadow: 0 0 0 1.5px var(--c-accent);
  border-color: var(--c-orange);
}

/* ---------- Buttons -------------------------------------------------- */
.btn-primary {
  display: block;
  width: 100%;
  min-height: var(--tap);
  margin-top: 14px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: #fff;
  background: var(--c-accent);
  border: none;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled {
  background: #3a4a50;
  color: #6a7a80;
  cursor: not-allowed;
}
.btn-link {
  display: block;
  width: 100%;
  min-height: var(--tap);
  margin-top: 10px;
  background: transparent;
  border: none;
  color: var(--c-accent);
  font-family: var(--font-sans);
  font-size: 15px;
  cursor: pointer;
  text-decoration: underline;
  transition: color 0.15s;
}
.btn-link:hover { color: var(--c-gold); }
.btn-group {
  margin-top: 14px;
}
.btn-group .btn-primary { margin-top: 0; }
.btn-group .btn-link { margin-top: 6px; }

/* ---------- Help / details ------------------------------------------- */
.help {
  margin-top: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 10px 14px;
}
.help summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--c-gold);
  padding: 6px 0;
}
.help[open] summary { margin-bottom: 6px; }
.help ol, .help ul { padding-left: 20px; margin: 6px 0; }
.help li { margin: 4px 0; }

/* ---------- Generation header ---------------------------------------- */
.gen-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.gen-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--c-accent);
  color: #fff;
  padding: 4px 10px;
}

/* ---------- Build grid ------------------------------------------------ */
.build-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 12px 0 18px;
}
.build-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--card-color, var(--c-accent));
  padding: 12px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.build-card:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}
.build-card-header {
  margin-bottom: 6px;
}
.build-card-num {
  font-weight: 500;
  font-size: 16px;
}
.build-card-plane {
  display: flex;
  justify-content: center;
}
.build-card-plane .plane-svg {
  width: 100%;
  max-width: 280px;
  height: auto;
}
.build-card-params {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-terra);
  line-height: 1.8;
  margin: 8px 0 0;
}
.build-card-params strong {
  color: var(--c-gold);
}

/* ---------- Plane hero (final screen) -------------------------------- */
.plane-hero {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 18px 10px;
  margin: 14px 0 8px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.plane-hero .plane-svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

/* ---------- Param grid (final screen) -------------------------------- */
.param-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 10px 0 18px;
}
.param-chip {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.param-chip .mini-svg {
  flex: 0 0 auto;
  width: 54px;
  height: 34px;
}
.param-chip .param-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.param-chip .param-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--c-terra);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}
.param-chip .param-val {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-gold);
}

/* ---------- Input plane sections ------------------------------------- */
.input-plane-section {
  margin-bottom: 14px;
  padding: 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--card-color, var(--c-accent));
}
.input-plane-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.input-plane-header .mini-plane {
  flex: 0 0 auto;
  width: 56px;
  height: 34px;
}
.input-plane-header .mini-plane svg {
  width: 100%;
  height: 100%;
}
.input-plane-title {
  font-weight: 500;
  font-size: 15px;
  flex: 1;
}
.input-plane-stat {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--c-gold);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.input-throws {
  display: flex;
  gap: 8px;
}
.input-throws .throw-input {
  flex: 1;
}

/* ---------- Throw input ---------------------------------------------- */
.throw-input {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  padding: 6px 8px;
}
.throw-input .throw-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  color: var(--c-terra);
  width: 18px;
  flex: 0 0 18px;
}
.throw-input input {
  border: none;
  padding: 6px 2px;
  min-height: 34px;
  font-size: 16px;
  font-family: var(--font-sans);
  background: transparent;
  color: var(--c-gold);
  width: 100%;
  min-width: 0;
}
.throw-input input:focus { outline: none; }
.throw-input .unit {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--c-terra);
}
.throw-input.filled {
  border-color: var(--c-accent);
  background: rgba(42,157,143,0.08);
}

/* ---------- Stats ---------------------------------------------------- */
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-terra);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}
.stat-big {
  font-size: 34px;
  font-weight: 300;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}

.fitness-card {
  margin: 14px 0;
  padding: 14px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
}

/* ---------- Fly stage (between screen) ------------------------------- */
.fly-stage {
  position: relative;
  height: 160px;
  margin: 10px 0 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  overflow: hidden;
}
.fly-lane {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: calc(100% - 16px);
  height: 1px;
  background: repeating-linear-gradient(
    to right, var(--c-border) 0 6px, transparent 6px 12px);
}
.fly-plane {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translate(0, -50%);
  width: 56px;
  height: 32px;
}
.fly-plane.flying {
  animation: fly-right var(--fly-duration, 1.6s) ease-out forwards;
}
@keyframes fly-right {
  from { transform: translate(0, -50%) rotate(-3deg); }
  to   { transform: translate(var(--fly-x, 200px), -50%) rotate(4deg); }
}
.fly-scale {
  position: absolute;
  left: 8px; right: 8px;
  bottom: 4px;
  height: 14px;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--c-terra);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

/* ---------- Thinking animation ---------------------------------------- */
.thinking {
  text-align: center;
  padding: 28px 16px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.thinking-dots {
  display: flex;
  gap: 10px;
  margin: 22px 0 14px;
  height: 32px;
  align-items: flex-end;
}
.thinking-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-accent);
  animation: bounce 1.4s ease-in-out infinite;
}
.thinking-dots span:nth-child(2) { animation-delay: 0.16s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.32s; }
@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: 0.35; }
  30%      { transform: translateY(-18px); opacity: 1; }
  50%      { transform: translateY(-4px); opacity: 0.8; }
  70%      { transform: translateY(-12px); opacity: 0.9; }
}
.thinking-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-terra);
  font-weight: 400;
  letter-spacing: 0.08em;
  margin: 0;
  transition: color 0.3s;
}
.thinking.done .thinking-dots span {
  animation: none;
  opacity: 1;
  transform: none;
  background: var(--c-accent);
  transition: opacity 0.4s, transform 0.4s;
}
.thinking.done .thinking-text {
  color: var(--c-accent);
}

/* ---------- Next proposal / chart ------------------------------------ */
.next-proposal {
  margin-top: 10px;
  animation: fadeSlideIn 0.7s ease-out;
}
.chart-section {
  margin: 18px 0 10px;
}
.chart-wrap {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 12px;
}
.chart-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- Population history --------------------------------------- */
.population-block {
  margin: 22px 0 6px;
}
.population-block h3 { margin: 0 0 10px; }
.pop-round { margin-bottom: 14px; }
.pop-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pop-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  transition: transform 0.15s, box-shadow 0.15s;
}
.pop-card:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}
.pop-card.winner {
  border-color: var(--c-gold);
  box-shadow: 0 0 0 1px var(--c-gold) inset;
}
.pop-card .pop-plane {
  flex: 0 0 auto;
  width: 68px;
  height: 40px;
}
.pop-card .pop-plane svg { width: 100%; height: 100%; }
.pop-card .pop-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}
.pop-card .pop-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--c-terra);
  letter-spacing: 0.08em;
}
.pop-card .pop-fit {
  font-size: 18px;
  font-weight: 300;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}
.pop-card .pop-params {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--c-text);
  line-height: 1.5;
}

/* ---------- Access card ----------------------------------------------- */
.access-card {
  margin-top: 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: var(--pad);
}
.access-row {
  display: flex;
  gap: 10px;
}
.access-pw-input {
  flex: 1;
  min-width: 0;
  min-height: var(--tap);
  padding: 10px 12px;
  font-size: 17px;
  font-family: var(--font-sans);
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  color: var(--c-gold);
  -webkit-appearance: none;
  appearance: none;
}
.access-pw-input::placeholder {
  color: var(--c-terra);
  opacity: 0.6;
}
.access-pw-input:focus {
  outline: none;
  box-shadow: 0 0 0 1.5px var(--c-accent);
  border-color: var(--c-orange);
}
.btn-go {
  flex: 0 0 auto;
  min-height: var(--tap);
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: #fff;
  background: var(--c-accent);
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.15s;
}
.btn-go:hover { opacity: 0.9; }
.btn-go:active { transform: scale(0.97); }

.pw-hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-terra);
  margin: 6px 0 0;
}

.access-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 16px 0;
  color: var(--c-text);
  opacity: 0.4;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.access-divider::before,
.access-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--c-border);
}

.btn-trial {
  display: block;
  width: 100%;
  min-height: var(--tap);
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--c-terra);
  background: transparent;
  border: 1px solid var(--c-terra);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.btn-trial:hover {
  background: rgba(231,111,81,0.1);
  color: var(--c-orange);
  border-color: var(--c-orange);
}

/* ---------- Trial timer ---------------------------------------------- */
.trial-timer {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--c-terra);
  background: rgba(231,111,81,0.15);
  padding: 4px 10px;
  font-variant-numeric: tabular-nums;
}

/* ---------- Expired / contact screen --------------------------------- */
.expired-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 24px 20px;
  text-align: center;
  margin-top: 18px;
}
.expired-card p {
  margin: 6px 0;
  font-size: 16px;
}
.expired-card strong {
  color: var(--c-gold);
}
.contact-email {
  display: inline-block;
  margin-top: 10px;
  font-size: 20px;
  font-weight: 500;
  color: var(--c-accent);
  text-decoration: none;
  padding: 10px 18px;
  border: 1px solid var(--c-accent);
  transition: background 0.15s, color 0.15s;
}
.contact-email:hover {
  background: var(--c-accent);
  color: #fff;
}

/* ---------- Take-away ------------------------------------------------ */
.takeaway {
  margin-top: 22px;
  padding: 14px 16px;
  background: var(--c-surface);
  border-left: 3px solid var(--c-accent);
  color: var(--c-text);
  font-size: 15px;
}
.takeaway p { margin: 6px 0; }
.takeaway em { color: var(--c-gold); font-style: normal; }

/* ---------- Wider screens -------------------------------------------- */
@media (min-width: 560px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .input-throws .throw-input { flex: 1; }
}

@media (min-width: 760px) {
  main { padding: 24px; }
}