/* ═══════════════════════════════════════════════
   José P. Barrantes - Portfolio Styles
   ═══════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --bg-primary: #0d0d0d;
  --bg-secondary: #161616;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --text-primary: #f0ece4;
  --text-secondary: #9a958d;
  --text-muted: #5c5852;
  --accent-red: #c0392b;
  --accent-red-glow: rgba(192, 57, 43, 0.25);
  --accent-orange: #e67e22;
  --accent-warm: #d4a373;
  --label-ml: #c0392b;
  --label-data-eng: #2980b9;
  --label-stats: #8e44ad;
  --label-data-sci: #27ae60;
  --label-mlops: #e67e22;
  --label-api: #16a085;
  --label-talk: #f39c12;
  --border-subtle: rgba(240, 236, 228, 0.06);
  --border-active: rgba(240, 236, 228, 0.15);
  --radius: 12px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.3);
  --shadow-card-hover: 0 12px 48px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.4);
  --transition: 0.35s cubic-bezier(0.23, 1, 0.32, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-red) var(--bg-secondary);
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── Noise Overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

/* ── Navigation ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 3rem;
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(13,13,13,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-logo {
  font-family: 'Space Mono', monospace; font-size: 0.85rem;
  letter-spacing: 2px; color: var(--text-primary); text-transform: uppercase;
}
.nav-logo span { color: var(--accent-red); }

.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  font-size: 0.82rem; font-weight: 500; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-secondary);
  text-decoration: none; transition: color var(--transition); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1.5px; background: var(--accent-red);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

/* ── Hero ── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 6rem 3rem 4rem; position: relative; overflow: hidden;
}

.hero-bg-glow {
  position: absolute; width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, var(--accent-red-glow) 0%, transparent 70%);
  top: 10%; right: -10%; pointer-events: none;
  animation: pulse 8s ease-in-out infinite alternate;
}

@keyframes pulse {
  0% { opacity: 0.4; transform: scale(1); }
  100% { opacity: 0.7; transform: scale(1.15); }
}

.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem;
  max-width: 1200px; margin: 0 auto; width: 100%;
  align-items: center; position: relative; z-index: 2;
}

.hero-text { animation: fadeSlideUp 1s ease-out both; }

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  font-family: 'Space Mono', monospace; font-size: 0.75rem;
  letter-spacing: 4px; text-transform: uppercase; color: var(--accent-red);
  margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.75rem;
}
.hero-eyebrow::before { content: ''; width: 32px; height: 1.5px; background: var(--accent-red); }

.hero-name {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 5vw, 4.2rem); font-weight: 900; line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 60%, var(--accent-warm));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.hero-bio {
  font-size: 1.05rem; color: var(--text-secondary); max-width: 500px;
  margin-bottom: 2rem; font-weight: 300; line-height: 1.8;
}

.hero-value-prop {
  font-size: 1.05rem;
  color: var(--text-primary);
  max-width: 650px;
  margin-bottom: 1rem;
  font-weight: 600;
  line-height: 1.6;
}

.hero-meta { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-bottom: 2.5rem; }
.meta-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-muted); }
.meta-item svg { width: 16px; height: 16px; stroke: var(--accent-red); fill: none; stroke-width: 2; }

.hero-cta {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.85rem 2rem; background: var(--accent-red); color: var(--text-primary);
  text-decoration: none; font-weight: 600; font-size: 0.85rem;
  letter-spacing: 1px; text-transform: uppercase; border-radius: 6px;
  transition: all var(--transition); border: none; cursor: pointer;
}
.hero-cta:hover { background: #a93226; transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-red-glow); }
.hero-cta svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; transition: transform var(--transition); }
.hero-cta:hover svg { transform: translateX(4px); }

.hero-right { display: flex; flex-direction: column; gap: 2rem; animation: fadeSlideUp 1s 0.3s ease-out both; }

.hero-photo-wrapper { position: relative; width: 100%; max-width: 380px; margin: 0 auto; }
.hero-photo {
  width: 100%; aspect-ratio: 3/4; object-fit: cover; object-position: center 20%;
  border-radius: var(--radius); border: 2px solid var(--border-subtle);
  filter: saturate(0.85) contrast(1.05); transition: all var(--transition);
}
.hero-photo:hover { filter: saturate(1) contrast(1.05); border-color: var(--border-active); box-shadow: 0 16px 64px rgba(192,57,43,0.15); }
.hero-photo-wrapper::after {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius);
  background: linear-gradient(180deg, transparent 50%, rgba(13,13,13,0.6) 100%);
  pointer-events: none;
}

.hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius); padding: 1.4rem; transition: all var(--transition);
}
.stat-card:hover { border-color: var(--border-active); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.stat-number { font-family: 'Playfair Display', serif; font-size: 2rem; font-weight: 900; color: var(--accent-red); line-height: 1; margin-bottom: 0.4rem; }
.stat-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1.5px; font-weight: 500; }

/* ── Sections (shared) ── */
section { padding: 5rem 3rem; max-width: 1200px; margin: 0 auto; }
.section-header { margin-bottom: 3rem; }
.section-eyebrow {
  font-family: 'Space Mono', monospace; font-size: 0.72rem;
  letter-spacing: 4px; text-transform: uppercase; color: var(--accent-red);
  margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.75rem;
}
.section-eyebrow::before { content: ''; width: 24px; height: 1.5px; background: var(--accent-red); }
.section-title { font-family: 'Playfair Display', serif; font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 900; line-height: 1.15; }
.section-subtitle { color: var(--text-secondary); font-size: 0.95rem; margin-top: 0.75rem; font-weight: 300; }

/* ── Filter Bar ── */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 2.5rem; align-items: center; }
.filter-hint {
  font-size: 0.75rem; color: var(--text-muted); font-family: 'Space Mono', monospace;
  letter-spacing: 1px; text-transform: uppercase; margin-right: 0.75rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.filter-hint svg { width: 14px; height: 14px; stroke: var(--text-muted); fill: none; stroke-width: 2; }

.filter-btn {
  padding: 0.45rem 1rem; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.5px;
  border: 1.5px solid var(--border-subtle); border-radius: 100px; background: transparent;
  color: var(--text-secondary); cursor: pointer; transition: all var(--transition);
  font-family: 'DM Sans', sans-serif;
}
.filter-btn:hover { border-color: var(--border-active); color: var(--text-primary); background: rgba(255,255,255,0.03); }
.filter-btn.active {
  border-color: var(--active-color, var(--accent-red)); color: var(--text-primary);
  background: var(--active-color, var(--accent-red));
  box-shadow: 0 0 16px rgba(var(--glow-rgb, 192,57,43), 0.3);
}

/* ── Project Cards ── */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }

.project-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius); padding: 2rem; transition: all var(--transition);
  position: relative; overflow: hidden; cursor: default; animation: cardIn 0.6s ease-out both;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--card-accent, var(--accent-red)), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.project-card:hover { border-color: var(--border-active); transform: translateY(-8px); box-shadow: var(--shadow-card-hover); background: var(--bg-card-hover); }
.project-card:hover::before { opacity: 1; }
.project-card.hidden { display: none; }

@keyframes cardIn { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.card-labels { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.card-label {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  padding: 0.25rem 0.65rem; border-radius: 4px;
  background: rgba(var(--label-rgb), 0.12); color: var(--label-color);
  border: 1px solid rgba(var(--label-rgb), 0.25);
}

.card-title { font-family: 'Playfair Display', serif; font-size: 1.3rem; font-weight: 700; margin-bottom: 0.75rem; line-height: 1.3; }
.card-year { font-family: 'Space Mono', monospace; font-size: 0.7rem; color: var(--text-muted); letter-spacing: 1.5px; margin-bottom: 1rem; }
.card-description { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; font-weight: 300; margin-bottom: 1.5rem; }

.card-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.5rem; }
.tech-tag {
  font-family: 'Space Mono', monospace; font-size: 0.65rem; padding: 0.2rem 0.55rem;
  border-radius: 3px; background: rgba(240,236,228,0.04); color: var(--text-muted);
  border: 1px solid rgba(240,236,228,0.06); letter-spacing: 0.5px;
}

.card-link {
  display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.8rem;
  font-weight: 600; color: var(--accent-red); text-decoration: none;
  letter-spacing: 0.5px; transition: all var(--transition);
}
.card-link svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; transition: transform var(--transition); }
.card-link:hover { color: var(--accent-orange); }
.card-link:hover svg { transform: translateX(4px); }

.card-links-row { display: flex; flex-wrap: wrap; gap: 1.25rem; }

/* ── Talks ── */
.talk-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: 'Space Mono', monospace; font-size: 0.65rem;
  letter-spacing: 1px; text-transform: uppercase; color: var(--label-talk); margin-bottom: 1rem;
}
.talk-badge svg { width: 14px; height: 14px; stroke: var(--label-talk); fill: none; stroke-width: 2; }

/* ── Skills ── */
.skills-mosaic { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.75rem; }
.skills-group { margin-bottom: 2.5rem; }
.skills-group:last-child { margin-bottom: 0; }
.skills-group-title {
  font-family: 'Space Mono', monospace; font-size: 0.7rem; letter-spacing: 3px;
  text-transform: uppercase; color: var(--accent-red); margin-bottom: 1rem;
  padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: 0.6rem;
}
.skills-group-title svg { width: 15px; height: 15px; stroke: var(--accent-red); fill: none; stroke-width: 2; }
.skill-tile {
  background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: 8px;
  padding: 1.15rem 1.25rem; font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); transition: all var(--transition); position: relative; overflow: hidden;
}
.skill-tile::before {
  content: ''; position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: var(--accent-red); opacity: 0; transition: opacity var(--transition);
}
.skill-tile:hover { border-color: var(--border-active); color: var(--text-primary); transform: translateX(4px); }
.skill-tile:hover::before { opacity: 1; }
.skill-tile .skill-cat {
  font-family: 'Space Mono', monospace; font-size: 0.6rem; color: var(--accent-red);
  text-transform: uppercase; letter-spacing: 2px; margin-bottom: 0.35rem;
}

/* ── Footer ── */
footer {
  padding: 3rem; text-align: center; border-top: 1px solid var(--border-subtle);
  color: var(--text-muted); font-size: 0.8rem;
}
footer .footer-links { display: flex; justify-content: center; gap: 2rem; margin-bottom: 1.25rem; }
footer a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color var(--transition); font-size: 0.82rem; letter-spacing: 0.5px; }
footer a:hover { color: var(--accent-red); }

/* ── Responsive ── */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.25rem; }
  .hero { padding: 6rem 1.5rem 3rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-photo-wrapper { max-width: 280px; }
  section { padding: 3.5rem 1.5rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .filter-bar { gap: 0.5rem; }
}
@media (max-width: 480px) {
  .nav-links { display: none; }
  .hero-stats { grid-template-columns: 1fr; }
}