/* ============================================
   CoinMitet.com - Crypto Trading Mistake Review Tools
   Dark Theme | Responsive | Vanilla CSS
   ============================================ */

/* CSS Variables */
:root {
  --bg: #0B0F19;
  --bg-card: #111827;
  --bg-card-hover: #1a2236;
  --bg-input: #0d1117;
  --text-primary: #f0f0f5;
  --text-secondary: #8b92a8;
  --accent: #00D4AA;
  --accent-hover: #00b894;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --border: #2a2f3e;
  --border-hover: #3b4256;
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --transition: all 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Header & Nav */
.site-header {
  background: rgba(11, 15, 25, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--accent);
}

.logo:hover {
  text-decoration: none;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 80px 0 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero h1 span {
  color: var(--accent);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 212, 170, 0.3);
}

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

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--border-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.btn-full {
  width: 100%;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.1rem;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: 16px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: auto;
}

.card-link:hover {
  text-decoration: none;
}

.card-link::after {
  content: '→';
  transition: var(--transition);
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* Tool Page Layout */
.tool-page {
  padding: 48px 0 80px;
}

.tool-page-header {
  text-align: center;
  margin-bottom: 48px;
}

.tool-page-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.tool-page-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.tool-container {
  max-width: 720px;
  margin: 0 auto;
}

/* Form Elements */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.form-label small {
  font-weight: 400;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-left: 6px;
}

.checkbox-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  padding: 4px 0;
}

.checkbox-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 5px;
  background: var(--bg-input);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
  transition: var(--transition);
}

.checkbox-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.checkbox-item input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--bg);
  font-size: 12px;
  font-weight: 700;
}

.checkbox-item label {
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
  user-select: none;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.radio-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.radio-item input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--bg-input);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: var(--transition);
}

.radio-item input[type="radio"]:checked {
  border-color: var(--accent);
  border-width: 5px;
}

.radio-item label {
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text-primary);
  user-select: none;
}

.text-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.text-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.number-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.number-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

select.text-input {
  cursor: pointer;
}

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

/* Output / Result Card */
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 32px;
  display: none;
}

.result-card.visible {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.score-display {
  font-size: 3.5rem;
  font-weight: 800;
  text-align: center;
  margin: 16px 0;
  line-height: 1;
}

.score-display.good { color: var(--success); }
.score-display.warn { color: var(--warning); }
.score-display.bad { color: var(--danger); }

.score-label {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.result-item {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.result-item:last-child {
  margin-bottom: 0;
}

.result-item.danger { background: var(--danger-bg); border-left: 4px solid var(--danger); }
.result-item.warning { background: var(--warning-bg); border-left: 4px solid var(--warning); }
.result-item.success { background: var(--success-bg); border-left: 4px solid var(--success); }
.result-item.info { background: var(--info-bg); border-left: 4px solid var(--info); }

.result-item strong {
  display: block;
  font-weight: 700;
  margin-bottom: 4px;
  font-size: 1rem;
}

.output-textarea {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  resize: vertical;
  margin-bottom: 16px;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.copy-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--accent);
}

.copy-btn.copied {
  color: var(--success);
  border-color: var(--success);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-input);
  border-radius: 6px;
  overflow: hidden;
  margin: 16px 0;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.6s ease, background-color 0.3s ease;
}

.progress-bar-fill.good { background: var(--success); }
.progress-bar-fill.warn { background: var(--warning); }
.progress-bar-fill.bad { background: var(--danger); }

/* Article / Guide Content */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 0 80px;
}

.article-content h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 16px;
  color: var(--accent);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.article-content strong {
  color: var(--text-primary);
}

.article-content blockquote {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Disclaimer */
.disclaimer-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 0 80px;
}

.disclaimer-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 24px;
}

.disclaimer-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.disclaimer-box {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  border-radius: var(--radius);
  padding: 24px;
  margin: 32px 0;
}

.disclaimer-box p {
  color: var(--text-primary);
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-brand h3 span {
  color: var(--accent);
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }

/* Responsive */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .section {
    padding: 48px 0;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .tool-page-header h1 {
    font-size: 1.75rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .score-display {
    font-size: 2.5rem;
  }
}

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

  .hero h1 {
    font-size: 1.75rem;
  }

  .card {
    padding: 20px;
  }

  .result-card {
    padding: 20px;
  }

  .checkbox-group {
    padding: 16px;
  }
}

/* Utility */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }