/* ==========================================
   心里有数 - 共享样式表
   Notion 风格：干净白底、卡片式布局、圆角、微妙阴影
   ========================================== */

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

:root {
  /* 色彩系统 */
  --color-text: #37352f;
  --color-text-secondary: #787774;
  --color-text-tertiary: #9b9a97;
  --color-text-hint: #b0afa9;
  --color-bg: #ffffff;
  --color-bg-subtle: #fafaf9;
  --color-bg-muted: #f7f7f5;
  --color-border: #f0f0ed;
  --color-border-medium: #e8e8e3;
  --color-primary: #7c5cbf;
  --color-primary-light: #f0ebf8;
  --color-secondary: #2eaadc;
  --color-secondary-light: #e8f4fd;
  --color-gradient: linear-gradient(135deg, #7c5cbf 0%, #2eaadc 100%);
  --color-success: #4dab72;
  --color-warning: #f5a623;
  --color-danger: #e03e3e;
  --color-danger-light: #fdf0f0;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.1);

  /* 字体 */
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-base: 15px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 32px;
  --font-size-5xl: 48px;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* === Navigation === */
.nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo svg {
  width: 28px;
  height: 28px;
}

.nav-logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-step {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

/* === Progress Bar === */
.progress-container {
  background: white;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-gradient);
  border-radius: 3px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-top: 8px;
}

/* === Container === */
.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* === Cards === */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-md);
}

.card-subtle {
  background: var(--color-bg-subtle);
}

.card-gradient {
  background: linear-gradient(135deg, #f8f7ff 0%, #f0f9ff 100%);
  border: 2px solid var(--color-primary);
}

/* === Typography === */
.section-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-lg);
  text-align: center;
}

.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xl);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-text);
  color: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.btn-primary:hover {
  background: #2b2a25;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-gradient {
  background: var(--color-gradient);
  color: white;
}

.btn-gradient:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border-medium);
}

.btn-secondary:hover {
  background: var(--color-bg-subtle);
}

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

.btn-ghost:hover {
  background: var(--color-bg-muted);
  color: var(--color-text);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.btn-lg {
  padding: 14px 36px;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

/* === Form Elements === */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.form-hint {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-subtle);
  transition: all 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(124, 92, 191, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-hint);
}

textarea.form-input {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

/* === Option Buttons === */
.option-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.option-btn {
  padding: 16px;
  border: 1.5px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  background: var(--color-bg-subtle);
  font-size: var(--font-size-base);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  font-family: var(--font-family);
}

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

.option-btn.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(124,92,191,0.08), rgba(46,170,220,0.08));
  color: var(--color-primary);
  font-weight: 500;
}

/* === Validation Error === */
.validation-error {
  display: none;
  color: var(--color-danger);
  font-size: var(--font-size-md);
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--color-danger-light);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-danger);
  animation: shake 0.4s ease;
}

.validation-error.show {
  display: block;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* === Navigation Buttons === */
.nav-buttons {
  display: flex;
  gap: 12px;
  margin-top: var(--space-xl);
  margin-bottom: 80px;
}

.nav-buttons .btn {
  flex: 1;
}

/* === Hint System === */
.hint-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-md);
  color: var(--color-primary);
  cursor: pointer;
  margin-bottom: var(--space-md);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
  user-select: none;
}

.hint-toggle:hover {
  background: var(--color-primary-light);
}

.hint-toggle.revealed {
  color: var(--color-text-tertiary);
  cursor: default;
}

.hint-content {
  display: none;
  font-size: var(--font-size-md);
  color: #6b6b6b;
  line-height: 1.6;
  padding: 12px;
  background: var(--color-bg-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  border-left: 3px solid var(--color-primary);
}

.hint-content.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Progress Dots === */
.progress-dots {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
}

.progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-medium);
  transition: all 0.3s;
}

.progress-dot.active {
  background: var(--color-gradient);
  width: 10px;
  height: 10px;
}

.progress-dot.completed {
  background: var(--color-primary);
}

/* === Footer === */
.footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-hint);
  font-size: var(--font-size-sm);
}

/* === Utility Classes === */
.text-center { text-align: center; }
.text-gradient {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* === Loading State === */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  margin-top: 16px;
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

/* === Toast Notification === */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  z-index: 1000;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* === Responsive === */
@media (max-width: 640px) {
  .container { padding: 0 var(--space-md); }
  .option-group { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .page-title { font-size: var(--font-size-2xl); }
}

/* === Radar Chart Styles === */
.radar-chart-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
}

.radar-chart-container svg {
  max-width: 100%;
  height: auto;
}

/* === Badge === */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-gradient {
  background: var(--color-gradient);
  color: white;
}

/* === Level Map (Timeline) === */
.level-timeline {
  position: relative;
  padding-left: 36px;
}

.level-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-border-medium) 0%, var(--color-primary) 40%, var(--color-secondary) 100%);
  border-radius: 1px;
}

.level-node {
  position: relative;
  margin-bottom: 20px;
}

.level-node:last-child { margin-bottom: 0; }

.level-dot {
  position: absolute;
  left: -36px;
  top: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-border-medium);
  border: 2px solid white;
  box-shadow: 0 0 0 2px var(--color-border-medium);
  z-index: 1;
}

.level-node.current .level-dot {
  background: var(--color-gradient);
  box-shadow: 0 0 0 2px var(--color-primary), 0 0 0 5px rgba(124,92,191,0.2);
}

.level-node.target .level-dot {
  background: white;
  border: 2px solid var(--color-secondary);
  box-shadow: 0 0 0 2px var(--color-secondary);
}

.level-node.future .level-dot {
  background: #f0f0f0;
  box-shadow: 0 0 0 2px #e0e0e0;
}

.level-content { padding: 2px 0; }

.level-name {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 4px;
}

.level-node.current .level-name {
  color: var(--color-primary);
  font-weight: 600;
}

.level-node.target .level-name {
  color: var(--color-secondary);
  font-weight: 600;
}

.level-node.future .level-name { color: #b0b0b0; }

.level-brief {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* === Access Code Display === */
.access-code-display {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  padding: 10px 20px;
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-primary);
  font-family: 'Courier New', monospace;
}

/* === Disclaimer === */
.disclaimer {
  font-size: 12px;
  color: var(--color-text-hint);
  text-align: center;
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  line-height: 1.6;
}