/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f5f6fa;
  --color-surface: #ffffff;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-text: #1e1e2e;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-info: #2563eb;
  --color-info-bg: #dbeafe;
  --color-warning: #ca8a04;
  --color-warning-bg: #fef9c3;
  --color-error: #dc2626;
  --color-error-bg: #fee2e2;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

html {
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Layout ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.header-center {
  justify-content: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.participant-name {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.main {
  padding-bottom: 60px;
}

/* ===== Typography ===== */
h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.text-muted {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ===== Cards ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  position: relative;
}

.card-narrow {
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 60px;
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s, border-color 0.15s;
}

.card-link:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.card-done {
  border-left: 4px solid var(--color-success);
}

.card-badge {
  position: absolute;
  top: 12px;
  right: 16px;
  background: var(--color-success-bg);
  color: var(--color-success);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.15s;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 5px 12px;
  font-size: 0.8rem;
}

/* ===== Progress ===== */
.progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--color-bg);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 999px;
  transition: width 0.3s;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ===== Questions ===== */
.question-card {
  padding: 24px;
}

.question-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.question-text {
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.5;
}

.choices-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.choice-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-size: 0.95rem;
}

.choice-label:hover {
  border-color: var(--color-primary);
  background: rgba(79, 70, 229, 0.03);
}

.choice-label input[type="radio"] {
  accent-color: var(--color-primary);
  width: 18px;
  height: 18px;
}

.field-errors {
  margin-bottom: 8px;
}

.field-errors .error {
  color: var(--color-error);
  font-size: 0.85rem;
}

/* ===== Alerts ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.alert-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.alert-info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

/* ===== Actions bar ===== */
.actions-bar {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
}

/* ===== Results ===== */
.results-block {
  margin-bottom: 36px;
}

.results-block h3 {
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.result-card {
  padding: 20px 24px;
}

.result-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}

.result-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.result-value {
  font-weight: 600;
}

.my-answer {
  color: var(--color-primary);
}

.others-answers {
  margin-top: 12px;
  margin-bottom: 12px;
}

.others-list {
  list-style: none;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
}

.convergence {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 4px;
}

.convergence-full {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.convergence-high {
  background: #d1fae5;
  color: #059669;
}

.convergence-partial {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.convergence-low {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.convergence-pct {
  font-weight: 700;
}

/* ===== Blocks list ===== */
.blocks-list {
  margin-top: 24px;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .card {
    padding: 16px;
  }

  .card-narrow {
    margin-top: 32px;
  }

  h2 {
    font-size: 1.25rem;
  }
}