/* ===========================
   Base & Reset
   =========================== */

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

:root {
  --accent: #E8553D;
  --bg: #111724;
  --bg-card: #131825;
  --text: #EDF0F5;
  --text-muted: #8891A5;
  --text-dim: #7A849E;
  --sidebar-width: 320px;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-display: 'Playfair Display', serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===========================
   Layout: Two Panels
   =========================== */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 10;
  border-right: 1px solid #1C2235;
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.content {
  margin-left: var(--sidebar-width);
  padding: 80px 80px 120px;
  max-width: 900px;
}

/* ===========================
   Sidebar
   =========================== */

.name {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.role {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 48px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: auto;
  margin-bottom: auto;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.3s ease;
  position: relative;
  padding-left: 0;
  transition: padding-left 0.3s ease, color 0.3s ease;
}

.nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  padding-left: 20px;
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 12px;
}

.sidebar-footer {
  display: flex;
  gap: 20px;
  margin-top: auto;
}

.social-link {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

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

/* ===========================
   Projects
   =========================== */

.project {
  padding: 80px 0;
  border-bottom: 1px solid #1C2235;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.project.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.project-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.project-tag {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 12px;
  border: 1px solid #2A3248;
  border-radius: 100px;
}

.project-problem {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 40px;
  max-width: 600px;
}

.project-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.summary-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.summary-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.project-visual {
  margin-bottom: 32px;
}

.visual-placeholder {
  width: 100%;
  height: 360px;
  background: var(--bg-card);
  border: 1px solid #1C2235;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.visual-placeholder:hover {
  border-color: var(--accent);
  transform: scale(1.005);
  box-shadow: 0 0 20px rgba(232, 85, 61, 0.4), 0 0 40px rgba(232, 85, 61, 0.15);
}

.project-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #1C2235;
  cursor: pointer;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.project-image:hover {
  border-color: var(--accent);
  transform: scale(1.005);
  box-shadow: 0 0 20px rgba(232, 85, 61, 0.4), 0 0 40px rgba(232, 85, 61, 0.15);
}

.project-cta {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--accent);
  transition: color 0.3s ease, border-color 0.3s ease;
}

.project-cta::after {
  content: '\2192';
  display: inline-block;
  width: 0;
  overflow: hidden;
  opacity: 0;
  transition: width 0.3s ease, opacity 0.3s ease, margin-left 0.3s ease;
  margin-left: 0;
}

.project-cta:hover {
  color: var(--accent);
}

.project-cta:hover::after {
  width: 16px;
  opacity: 1;
  margin-left: 6px;
}

/* ===========================
   About
   =========================== */

.about-section,
.contact-section {
  padding: 100px 0 80px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  margin-bottom: 40px;
}

.about-content {
  max-width: 560px;
}

.about-text {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.8;
}

.about-details {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.detail-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 6px;
}

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

/* ===========================
   Contact
   =========================== */

.contact-text {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 400px;
}

.contact-email {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
  transition: color 0.3s ease;
}

.contact-email:hover {
  color: var(--accent);
}

/* ===========================
   Responsive
   =========================== */

@media (max-width: 900px) {
  .sidebar {
    position: relative;
    width: 100%;
    height: auto;
    padding: 32px 24px;
    border-right: none;
    border-bottom: 1px solid #1C2235;
  }

  .sidebar-content {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
  }

  .name {
    font-size: 1.5rem;
  }

  .name br {
    display: none;
  }

  .role {
    margin-bottom: 0;
  }

  .nav {
    flex-direction: row;
    margin: 0;
  }

  .sidebar-footer {
    display: none;
  }

  .content {
    margin-left: 0;
    padding: 40px 24px 80px;
  }

  .project-problem {
    font-size: 1.5rem;
  }

  .project-summary {
    grid-template-columns: 1fr;
  }
}