:root {
  /* Notion Light Mode Colors */
  --bg-color: #ffffff;
  --card-bg: rgba(0, 0, 0, 0.02);
  --border-color: rgba(55, 53, 47, 0.16);
  --border-hover: rgba(55, 53, 47, 0.25);
  --text-color: #37352f;
  --subtext-color: rgba(55, 53, 47, 0.65);
  --accent-color: #2383e2;
  --error-color: #eb5757;
  --success-color: #0f8243;
  --input-bg: rgba(242, 241, 238, 0.6);
  
  --font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
  --transition: all 0.2s ease-in-out;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 700px;
  padding: 40px 20px;
}

/* Header */
.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 40px;
}

.logo-wrapper {
  margin-bottom: 20px;
}

.logo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  padding: 4px;
  background-color: #ffffff; /* Make logo visible on dark bg */
}

.title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--subtext-color);
  margin-bottom: 16px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 4px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
}

/* Team Info */
.team-info {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.ctf-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 4px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.ctf-link:hover {
  background: rgba(255,255,255,0.08);
}

.ctf-link .arrow {
  font-size: 1rem;
}

.core-members {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.member {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.member .name {
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 2px;
}

.member .role {
  color: var(--subtext-color);
  font-size: 0.75rem;
}

/* Progress */
.progress-container {
  margin-bottom: 30px;
}

.progress-bar {
  height: 4px;
  background-color: var(--input-bg);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  width: 16.66%;
  background-color: var(--text-color);
  transition: width 0.3s ease;
}

.progress-text {
  text-align: right;
  font-size: 0.8rem;
  color: var(--subtext-color);
}

/* Form Container */
#recruitment-form {
  position: relative;
}

.step-card {
  background-color: transparent;
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.step-card.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.step-card.fade-out {
  display: block;
  opacity: 0;
  transform: translateY(-10px);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  pointer-events: none;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-color);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.instruction-text {
  color: var(--text-color);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-group.hidden {
  display: none;
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 8px;
}

.required {
  color: var(--error-color);
  margin-left: 2px;
}

input[type="text"],
input[type="number"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-family: var(--font-family);
  font-size: 0.95rem;
  transition: var(--transition);
}

.select-wrapper {
  position: relative;
}

.select-wrapper::after {
  content: '▼';
  font-size: 0.6rem;
  color: var(--subtext-color);
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 32px;
  cursor: pointer;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(46, 170, 220, 0.5); /* Notion Blue focus */
  background-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 2px rgba(46, 170, 220, 0.2);
}

input::placeholder,
textarea::placeholder {
  color: var(--subtext-color);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

/* Radio Buttons */
.radio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

.radio-inline {
  display: flex;
  gap: 16px;
}

.radio-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: transparent;
  transition: var(--transition);
}

.radio-label:hover {
  background: var(--input-bg);
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-label span {
  font-size: 0.9rem;
  color: var(--text-color);
}

.radio-label:has(input[type="radio"]:checked) {
  border-color: var(--accent-color);
  background: rgba(46, 170, 220, 0.1);
}

/* Range Slider */
.range-wrapper {
  padding: 10px 0;
}

input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  height: 4px;
  background: var(--input-bg);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-color);
  cursor: pointer;
}

/* Challenge Box */
.challenge-box {
  border: 1px solid var(--border-color);
  background: transparent;
  border-radius: 4px;
  padding: 20px;
  margin-bottom: 24px;
}

.challenge-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.challenge-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.badge.diff-easy { border-color: rgba(15, 130, 67, 0.4); color: var(--success-color); background: rgba(15, 130, 67, 0.1); }
.badge.diff-medium { border-color: rgba(235, 87, 87, 0.3); color: var(--error-color); background: rgba(235, 87, 87, 0.1); }

.challenge-desc p {
  color: var(--text-color);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.challenge-desc em {
  color: var(--subtext-color);
}

.asset-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  color: var(--text-color);
  text-decoration: underline;
  font-size: 0.9rem;
}

.asset-link:hover {
  color: var(--accent-color);
}

.code-block {
  background: var(--input-bg);
  padding: 12px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--text-color);
  margin-top: 12px;
  word-break: break-all;
  border: 1px solid var(--border-color);
}

.mt-4 { margin-top: 20px; }

/* Final Line */
.final-line {
  margin-top: 40px;
  text-align: center;
  font-style: italic;
  font-weight: 500;
  color: var(--text-color);
  font-size: 0.95rem;
}

/* Actions */
.form-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--font-family);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--text-color);
  color: var(--bg-color);
  border-color: var(--text-color);
}

.btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--input-bg);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Success Card */
.success-card {
  text-align: center;
  padding: 60px 20px;
}

.success-icon {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: var(--success-color);
  margin-bottom: 16px;
}

/* Responsive */
@media (max-width: 640px) {
  .radio-grid {
    grid-template-columns: 1fr;
  }
  
  .radio-inline {
    flex-direction: column;
    gap: 8px;
  }
}