:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --panel: #ffffff;
  --text: #1f2a28;
  --muted: #65706d;
  --line: #dfe5df;
  --primary: #266c5f;
  --primary-dark: #174b42;
  --warning: #a65122;
  --shadow: 0 16px 40px rgba(27, 48, 44, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.85), rgba(246, 247, 244, 0.94) 38%),
    var(--bg);
}

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.screen {
  width: min(100%, 720px);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(28px, env(safe-area-inset-top)) 20px max(32px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.screen--material {
  width: 100%;
  max-width: 720px;
  padding: 0 0 max(28px, env(safe-area-inset-bottom));
  justify-content: flex-start;
  background: #ffffff;
}

.content-panel {
  width: 100%;
  padding: 28px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
}

.title {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 24px;
  line-height: 1.28;
}

.copy {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.78;
  white-space: pre-line;
}

.copy + .copy {
  margin-top: 16px;
}

.field {
  margin-top: 24px;
}

.participant-input {
  width: 100%;
  height: 52px;
  padding: 0 15px;
  border: 1px solid #bdc9c4;
  border-radius: 8px;
  color: var(--text);
  background: #ffffff;
  outline: none;
}

.participant-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(38, 108, 95, 0.14);
}

.error {
  min-height: 24px;
  margin: 8px 0 0;
  color: #b83b32;
  font-size: 14px;
  line-height: 1.5;
}

.actions {
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.primary-button,
.secondary-button {
  width: min(100%, 280px);
  min-height: 56px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: var(--primary);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(38, 108, 95, 0.22);
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(1px);
}

.secondary-button {
  color: var(--primary-dark);
  background: #dcece7;
  box-shadow: none;
}

.material-header,
.material-footer {
  padding: 14px 16px;
  background: #ffffff;
}

.material-header {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid var(--line);
}

.material-title {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}

.material-wrap {
  width: 100%;
  background: #ffffff;
}

.material-image {
  width: 100%;
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
}

.material-missing {
  margin: 16px;
  padding: 18px;
  border: 1px solid rgba(166, 81, 34, 0.25);
  border-radius: 8px;
  color: var(--warning);
  background: #fff7ed;
  font-size: 15px;
  line-height: 1.7;
}

.debug-note {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

@media (max-width: 380px) {
  .screen {
    padding-left: 16px;
    padding-right: 16px;
  }

  .content-panel {
    padding: 24px 18px;
  }

  .title {
    font-size: 22px;
  }

  .copy {
    font-size: 16px;
  }
}