:root {
  --accent: #222222;
  --accent-dark: #1a1a1a;
  --accent-light: #f3f3f3;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #444444;
  --text-muted: #999999;
  --border: #e0e0e0;
  --font-sans: "Inter", sans-serif;
}

* {
  font-family: "Pretendard", "Inter", sans-serif;
}

::selection {
  color: #ffffff;
  background: #222222;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  padding: 2rem 1rem;
}

.portfolio-container {
  max-width: 800px;
  margin: 0 auto;
}

/* Top bar */
.portfolio-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.back-link {
  display: inline-block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease-in-out;
}

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

.btn-pill {
  background-color: var(--card-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 16px;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition:
    border-color 0.3s ease-in-out,
    color 0.3s ease-in-out,
    background-color 0.3s ease-in-out;
}

.btn-pill:hover {
  border-color: var(--accent);
  color: #ffffff;
  background-color: var(--accent);
}

/* Header */
.portfolio-header {
  text-align: center;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 3px solid var(--accent);
}

.portfolio-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 2px;
  margin-bottom: 0.25rem;
}

.portfolio-header .title {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 500;
}

/* Company section */
.company-section {
  margin-bottom: 3rem;
  counter-reset: card-counter;
}

.company-section + .company-section {
  padding-top: 3rem;
  border-top: 2px solid var(--border);
}

.company-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.company-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.company-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.company-tech span {
  background-color: var(--accent-light);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* Service introduction */
.service-intro {
  background-color: var(--accent-light);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.service-intro-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.5rem;
}

.service-intro p {
  margin-bottom: 0.75rem;
}

.service-intro p:last-child {
  margin-bottom: 0;
}

/* Portfolio card */
.portfolio-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 2.25rem;
  overflow: hidden;
  counter-increment: card-counter;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  background-color: var(--accent-light);
  border-bottom: 1px solid var(--border);
}

.card-title::before {
  content: counter(card-counter, decimal-leading-zero) ". ";
  color: var(--accent);
  font-weight: 700;
  margin-right: 0.25rem;
}

.card-body {
  padding: 0.75rem 1rem;
}

.card-section {
  margin-bottom: 0.5rem;
}

.card-section:last-of-type {
  margin-bottom: 0.75rem;
}

.card-section h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.card-section p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-section p strong,
.service-intro p strong {
  color: var(--text-primary);
  font-weight: 700;
}

.card-contrib {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* PDF download mode */
.pdf-mode {
  padding: 0 !important;
}

.pdf-mode .portfolio-top-bar {
  display: none;
}

.pdf-mode .portfolio-container {
  max-width: 100%;
  margin: 0;
  padding: 0 0 0 6px;
  font-size: 15px;
  line-height: 1.6;
  overflow: visible;
  word-break: keep-all;
}

.pdf-mode .portfolio-header {
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.pdf-mode .portfolio-header h1 {
  font-size: 28px;
  margin-bottom: 4px;
}

.pdf-mode .portfolio-header .title {
  font-size: 15px;
}

.pdf-mode a {
  color: var(--text-primary) !important;
}

.pdf-mode .company-section {
  margin-bottom: 28px;
}

.pdf-mode .company-section + .company-section {
  padding-top: 24px;
  border-top: 1.5px solid var(--border);
}

.pdf-mode .company-heading {
  font-size: 14.5px;
  padding-bottom: 4px;
  margin-bottom: 6px;
  break-after: avoid;
  page-break-after: avoid;
}

.pdf-mode .company-meta {
  font-size: 13px;
  margin-bottom: 4px;
}

.pdf-mode .company-tech {
  margin-bottom: 12px;
}

.pdf-mode .company-tech span {
  font-size: 11px;
  padding: 3px 8px;
}

.pdf-mode .service-intro {
  padding: 10px 14px;
  margin-bottom: 18px;
  font-size: 13px;
  line-height: 1.65;
}

.pdf-mode .service-intro-title {
  font-size: 12px;
  margin-bottom: 5px;
}

.pdf-mode .service-intro p {
  margin-bottom: 6px;
}

.pdf-mode .portfolio-card {
  margin-bottom: 26px;
}

.pdf-mode .card-title,
.pdf-mode .card-section,
.pdf-mode .card-contrib {
  break-inside: avoid;
  page-break-inside: avoid;
}

.pdf-mode .card-title {
  font-size: 14px;
  padding: 8px 12px;
}

.pdf-mode .card-body {
  padding: 8px 12px;
}

.pdf-mode .card-section h5 {
  font-size: 13.5px;
  margin-bottom: 3px;
}

.pdf-mode .card-section p {
  font-size: 14px;
  line-height: 1.65;
}

.pdf-mode .card-contrib {
  font-size: 12px;
}

/* Responsive */
@media (max-width: 600px) {
  .portfolio-header h1 {
    font-size: 1.5rem;
  }

  .company-tech {
    gap: 0.3rem;
  }
}