/* Modern Design System - True Hourly Rate Calculator */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Noto+Sans+KR:wght@300;400;500;700;900&display=swap');

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-card: rgba(23, 32, 54, 0.7);
  --bg-card-hover: rgba(30, 42, 70, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.4);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Outfit', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.85);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.brand-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

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

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

/* Hero Section */
.hero {
  text-align: center;
  padding: 60px 0 35px;
  max-width: 850px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  border: 1px solid var(--border-highlight);
  color: #a5b4fc;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* App Grid Layout */
.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 60px;
}

@media (max-width: 992px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Styling */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-normal);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
}

.card-title i {
  color: var(--primary);
}

/* Form Controls */
.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.label-hint {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-weight: 400;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input[type="number"], .input-wrapper select {
  width: 100%;
  background: rgba(11, 15, 25, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  padding-right: 50px;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  font-family: inherit;
  outline: none;
  transition: var(--transition-fast);
}

.input-wrapper input:focus, .input-wrapper select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.input-suffix {
  position: absolute;
  right: 16px;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.9rem;
  pointer-events: none;
}

/* Slider */
.slider-group {
  margin-top: 8px;
}

input[type="range"] {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Results Section */
.result-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.result-tag {
  font-size: 0.85rem;
  font-weight: 700;
  color: #a5b4fc;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.result-main-val {
  font-size: 3.2rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 8px;
}

.result-diff {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.result-diff.negative {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.result-diff.positive {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Comparison Table / Grid */
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-label {
  color: var(--text-muted);
}

.stat-val {
  font-weight: 700;
  color: var(--text-main);
}

/* Equivalent Cost Cards */
.eq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}

.eq-card {
  background: rgba(11, 15, 25, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
}

.eq-icon {
  font-size: 1.6rem;
  margin-bottom: 4px;
}

.eq-name {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.eq-time {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-top: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #ffffff;
  width: 100%;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  width: 100%;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.action-buttons {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

/* Content & Article Section */
.content-section {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
}

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

.section-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 10px;
}

.article-h3 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-summary {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-meta {
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Benchmark Comparison Section */
.benchmark-box {
  background: rgba(19, 27, 46, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 40px;
}

.benchmark-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.benchmark-table th, .benchmark-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.benchmark-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: 0.88rem;
  text-transform: uppercase;
}

.benchmark-table td {
  font-size: 0.95rem;
}

/* Footer */
.footer {
  background: #070a12;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
  margin-top: 80px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.footer-links-title {
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-dim);
}