:root {
  --bg: #eaf8ef;
  --bg2: #d5f1ff;
  --panel: rgba(255, 255, 255, 0.88);
  --ink: #17312b;
  --muted: #5d766e;
  --line: #a9d6c4;
  --leaf: #54b96f;
  --leaf-dark: #237b43;
  --sea: #41a7cb;
  --sand: #ffe7a8;
  --danger: #b84242;
  --shadow: 0 18px 45px rgba(27, 78, 61, 0.17);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Verdana, Geneva, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 231, 168, 0.75), transparent 34rem),
    radial-gradient(circle at top right, rgba(65, 167, 203, 0.38), transparent 32rem),
    linear-gradient(135deg, var(--bg), var(--bg2));
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: radial-gradient(circle, #2d8553 1.1px, transparent 1.2px);
  background-size: 22px 22px;
}

.page-shell {
  width: min(1100px, calc(100% - 28px));
  margin: 0 auto;
  padding: 22px 0 40px;
  position: relative;
}

.hero, .panel, footer {
  background: var(--panel);
  border: 2px solid rgba(255,255,255,.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero {
  border-radius: 34px;
  padding: clamp(24px, 5vw, 52px);
  text-align: center;
  overflow: hidden;
  position: relative;
}
.hero::after {
  content: '✈';
  position: absolute;
  right: 28px;
  bottom: 10px;
  font-size: 5rem;
  opacity: .13;
  rotate: -10deg;
}
.eyebrow {
  margin: 0 0 10px;
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--leaf-dark);
  font-weight: 800;
}
h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: .95;
}
.subtitle {
  max-width: 780px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.main-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0;
}
.main-nav a, button {
  border: 0;
  border-radius: 999px;
  padding: 11px 17px;
  color: white;
  text-decoration: none;
  background: linear-gradient(135deg, var(--leaf), var(--sea));
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(34, 123, 84, .22);
}
.main-nav a:hover, button:hover { filter: brightness(1.05); transform: translateY(-1px); }

.flash-wrap { display: grid; gap: 10px; margin: 16px 0; }
.flash {
  padding: 12px 16px;
  border-radius: 18px;
  font-weight: 700;
  box-shadow: var(--shadow);
}
.flash.success { background: #dcffdf; border: 1px solid #82d38c; }
.flash.error { background: #ffe1df; border: 1px solid #e88b82; }

.panel {
  border-radius: 26px;
  padding: clamp(18px, 3vw, 28px);
  margin: 16px 0;
}
.panel h2 { margin-top: 0; font-size: clamp(1.35rem, 2.5vw, 2rem); }
p { line-height: 1.58; }
code {
  background: rgba(35,123,67,.1);
  border: 1px solid rgba(35,123,67,.18);
  padding: 2px 5px;
  border-radius: 6px;
}
.small-note { color: var(--muted); font-size: .94rem; }
.warning-note { color: #8a4e00; background: #fff4d8; padding: 10px 12px; border-radius: 12px; }

.rule-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0;
}
.rule-grid div {
  background: linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.45));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}
.section-head h2 { margin-bottom: 4px; }
.section-head p { margin: 0; color: var(--muted); }
.reload-button { white-space: nowrap; }

.empty-state {
  padding: 24px;
  text-align: center;
  border: 2px dashed var(--line);
  border-radius: 20px;
  color: var(--muted);
  background: rgba(255,255,255,.45);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.dodo-card {
  border-radius: 22px;
  padding: 18px;
  background: linear-gradient(180deg, #fffdf6, #e8fff0);
  border: 1px solid var(--line);
  box-shadow: 0 10px 25px rgba(31, 92, 68, .13);
  position: relative;
  overflow: hidden;
}
.dodo-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: var(--leaf);
}
.dodo-card.switch2::before { background: linear-gradient(90deg, #6c5ce7, #41a7cb); }
.dodo-card.slumber::before { background: linear-gradient(90deg, #40306f, #b17fd7); }
.card-topline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.badge, .tag-list span {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #dff8dc;
  color: var(--leaf-dark);
  font-weight: 800;
  padding: 5px 10px;
  font-size: .82rem;
}
.badge.soft { background: #dff4ff; color: #116b88; }
.valid { color: var(--muted); font-size: .85rem; font-weight: 700; }
.valid.expired { color: var(--danger); }
.dodo-card h3 { margin: 8px 0 6px; }
.dodo-code {
  margin: 12px 0;
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(2rem, 7vw, 3.1rem);
  letter-spacing: .14em;
  font-weight: 900;
  padding: 8px 16px;
  border-radius: 18px;
  background: #16312b;
  color: #fff5c8;
  box-shadow: inset 0 -5px 0 rgba(255,255,255,.08);
}
.session-type, .activity { margin: 8px 0; color: var(--muted); font-weight: 700; }
.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0; }
.details-block {
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 12px;
  background: rgba(255,255,255,.55);
}
.details-block summary { cursor: pointer; font-weight: 800; color: var(--leaf-dark); }
.details-block ul { margin: 10px 0 0 18px; padding: 0; }
.notes {
  background: rgba(255, 231, 168, .55);
  border-radius: 16px;
  padding: 12px;
}

.dodo-form { display: grid; gap: 16px; }
label, fieldset {
  display: grid;
  gap: 7px;
  font-weight: 800;
}
fieldset {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255,255,255,.4);
}
legend { padding: 0 8px; color: var(--leaf-dark); }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 13px;
  font: inherit;
  color: var(--ink);
  background: rgba(255,255,255,.92);
}
input:focus, select:focus, textarea:focus {
  outline: 3px solid rgba(84, 185, 111, .25);
  border-color: var(--leaf);
}
.big-code-label span { color: var(--muted); font-size: .88rem; font-weight: 500; }
.dodo-input {
  max-width: 260px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 2rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 900;
}
.grid-2, .grid-3 {
  display: grid;
  gap: 14px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.checks {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.checks legend { grid-column: 1 / -1; }
.checks label {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  font-weight: 600;
  font-size: .94rem;
}
.checks input { width: auto; margin-top: 3px; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; }
button.danger { background: linear-gradient(135deg, #d95b5b, #9c3333); }
.old-stack p {
  margin: 8px 0;
  padding: 9px 12px;
  border-radius: 12px;
  background: rgba(255,255,255,.5);
}
footer {
  border-radius: 20px;
  padding: 16px 20px;
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 850px) {
  .cards, .grid-2, .grid-3, .rule-grid { grid-template-columns: 1fr; }
  .checks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-head { align-items: stretch; flex-direction: column; }
  .reload-button { width: 100%; }
}

@media (max-width: 560px) {
  .page-shell { width: min(100% - 16px, 1100px); padding-top: 10px; }
  .hero, .panel { border-radius: 20px; }
  .main-nav { display: grid; grid-template-columns: 1fr 1fr; }
  .main-nav a { text-align: center; }
  .checks { grid-template-columns: 1fr; }
  .dodo-code { width: 100%; text-align: center; letter-spacing: .12em; }
  .form-actions button { width: 100%; }
}