/* ============================================================
   PROFESSIONAL BI PORTFOLIO - STYLES
   Cesar Sanabria | Power BI Developer & BI Analyst
   ============================================================ */

:root {
  --bg-primary:     #0d1117;
  --bg-secondary:   #161b22;
  --bg-card:        #1c2128;
  --bg-card-hover:  #21262d;
  --border:         #30363d;
  --border-accent:  #f78166;
  --accent:         #f0883e;
  --accent-2:       #3fb950;
  --accent-3:       #58a6ff;
  --accent-4:       #bc8cff;
  --text-primary:   #e6edf3;
  --text-secondary: #8b949e;
  --text-muted:     #6e7681;
  --tag-bg:         #1f2d3f;
  --tag-border:     #1d4ed8;
  --tag-text:       #93c5fd;
  --shadow:         0 8px 32px rgba(0,0,0,0.5);
  --radius:         10px;
  --radius-lg:      16px;
  --transition:     0.25s cubic-bezier(0.4,0,0.2,1);
}

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

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─── SCROLLBAR ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── NAV ────────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  font-weight: 700; font-size: 1.1rem; color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-brand span { color: var(--accent); }
.nav-links { display: flex; gap: 1.5rem; list-style: none; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.875rem; font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-cta {
  background: var(--accent); color: #000 !important;
  padding: 0.4rem 1rem; border-radius: 20px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: #ff9a4a !important; color: #000 !important; }
.nav-mobile-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.4rem; cursor: pointer; }

/* ─── HERO ───────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 80px 2rem 4rem;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(240,136,62,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(88,166,255,0.06) 0%, transparent 60%);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 0; opacity: 0.03;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-inner {
  position: relative; z-index: 1;
  max-width: 900px; width: 100%; text-align: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(240,136,62,0.12); border: 1px solid rgba(240,136,62,0.3);
  color: var(--accent); padding: 0.35rem 1rem; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; margin-bottom: 1.5rem;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.1; margin-bottom: 1rem;
}
.hero-name .highlight { color: var(--accent); }
.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary); margin-bottom: 1.5rem;
  font-weight: 400;
}
.hero-desc {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 680px; margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.hero-stats {
  display: flex; gap: 2rem; justify-content: center;
  margin-bottom: 2.5rem; flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-n {
  font-size: 2rem; font-weight: 800; color: var(--text-primary);
  letter-spacing: -0.03em; line-height: 1;
}
.hero-stat-l { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.25rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: 8px;
  font-size: 0.95rem; font-weight: 600; text-decoration: none;
  cursor: pointer; border: none; transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { background: #ff9a4a; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,136,62,0.35); }
.btn-secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-card); border-color: var(--text-muted); transform: translateY(-2px); }
.btn-outline-accent { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-outline-accent:hover { background: rgba(240,136,62,0.1); transform: translateY(-2px); }

/* ─── SECTIONS ───────────────────────────────────────────── */
section { padding: 5rem 2rem; }
.container { max-width: 1200px; margin: 0 auto; }
.section-label {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 1rem;
}
.section-sub {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 680px; line-height: 1.7; margin-bottom: 3rem;
}

/* ─── ABOUT / SKILLS ────────────────────────────────────── */
#about { background: var(--bg-secondary); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: start;
}
.about-text p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 1rem; }
.about-text strong { color: var(--text-primary); }
.skills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.skill-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: border-color var(--transition);
}
.skill-card:hover { border-color: var(--accent); }
.skill-icon { font-size: 1.5rem; margin-bottom: 0.75rem; }
.skill-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.5rem; }
.skill-list { font-size: 0.8rem; color: var(--text-muted); line-height: 1.7; }
.skill-bar-wrap { margin-top: 0.5rem; }
.skill-bar-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.35rem; }
.skill-bar-label { font-size: 0.75rem; color: var(--text-secondary); width: 90px; flex-shrink: 0; }
.skill-bar-track { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.skill-bar-fill { height: 100%; border-radius: 3px; background: var(--accent); }
.skill-bar-fill.blue { background: var(--accent-3); }
.skill-bar-fill.green { background: var(--accent-2); }
.skill-bar-fill.purple { background: var(--accent-4); }

/* ─── TOOLS STRIP ────────────────────────────────────────── */
.tools-strip {
  display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem;
}
.tool-chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--tag-bg); border: 1px solid var(--tag-border);
  color: var(--tag-text); padding: 0.3rem 0.75rem; border-radius: 20px;
  font-size: 0.78rem; font-weight: 600;
}
.tool-chip.green { background: #1a2f1a; border-color: #2ea043; color: #3fb950; }
.tool-chip.purple { background: #1f1a2f; border-color: #6e40c9; color: #bc8cff; }
.tool-chip.orange { background: #2f1e0d; border-color: #9a4b0f; color: var(--accent); }
.tool-chip.gray { background: var(--bg-card); border-color: var(--border); color: var(--text-secondary); }

/* ─── PROJECTS SECTION ───────────────────────────────────── */
#projects { background: var(--bg-primary); }
.filter-bar { display: flex; gap: 0.5rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.filter-btn {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); padding: 0.4rem 1rem; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--accent); border-color: var(--accent); color: #000;
}
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

/* ─── PROJECT CARD ───────────────────────────────────────── */
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer; transition: all var(--transition);
  display: flex; flex-direction: column;
}
.project-card:hover {
  border-color: var(--accent); transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.card-preview {
  height: 200px; position: relative; overflow: hidden;
}
.card-preview-img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover .card-preview-img { transform: scale(1.04); }
.card-preview-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  position: relative;
}
.card-preview-placeholder::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(0,0,0,0.3));
}
.preview-sise    { background: linear-gradient(135deg, #0d2137 0%, #1a3a52 50%, #0f2d44 100%); }
.preview-unw     { background: linear-gradient(135deg, #1a0d2e 0%, #2d1b4e 50%, #1a0d2e 100%); }
.preview-upc-ug  { background: linear-gradient(135deg, #0d1f37 0%, #1a3a5c 50%, #0d2137 100%); }
.preview-upc-med { background: linear-gradient(135deg, #0d2e1a 0%, #1a5225 50%, #0d2e1a 100%); }
.preview-upc-wa  { background: linear-gradient(135deg, #2e1a0d 0%, #522e0d 50%, #2e1a0d 100%); }
.card-rank-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  background: rgba(0,0,0,0.75); border: 1px solid var(--accent);
  color: var(--accent); padding: 0.25rem 0.6rem; border-radius: 5px;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.05em;
  backdrop-filter: blur(6px);
}
.card-complexity {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  display: flex; gap: 0.25rem;
}
.complexity-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); opacity: 0.4;
}
.complexity-dot.filled { opacity: 1; }
.card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.card-institution {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.4rem;
}
.card-title {
  font-size: 1.15rem; font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 0.75rem; color: var(--text-primary); line-height: 1.3;
}
.card-desc {
  font-size: 0.875rem; color: var(--text-secondary); line-height: 1.6;
  margin-bottom: 1rem; flex: 1;
}
.card-kpis { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.kpi-chip {
  background: rgba(240,136,62,0.1); border: 1px solid rgba(240,136,62,0.25);
  color: var(--accent); padding: 0.2rem 0.6rem; border-radius: 5px;
  font-size: 0.72rem; font-weight: 600;
}
.kpi-chip.blue { background: rgba(88,166,255,0.1); border-color: rgba(88,166,255,0.25); color: var(--accent-3); }
.kpi-chip.green { background: rgba(63,185,80,0.1); border-color: rgba(63,185,80,0.25); color: var(--accent-2); }
.kpi-chip.purple { background: rgba(188,140,255,0.1); border-color: rgba(188,140,255,0.25); color: var(--accent-4); }
.card-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 1rem; border-top: 1px solid var(--border);
}
.card-meta { display: flex; gap: 1rem; }
.card-meta-item { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.3rem; }
.card-cta {
  font-size: 0.8rem; font-weight: 700; color: var(--accent);
  display: flex; align-items: center; gap: 0.3rem;
}

/* ─── METRICS BAND ───────────────────────────────────────── */
#metrics {
  background: var(--bg-secondary);
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.metrics-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem; text-align: center;
}
.metric-item {}
.metric-n {
  font-size: 2.5rem; font-weight: 900; letter-spacing: -0.04em;
  color: var(--text-primary); line-height: 1;
}
.metric-n span { color: var(--accent); }
.metric-l { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 0.4rem; }

/* ─── METHODOLOGY ────────────────────────────────────────── */
#methodology { background: var(--bg-primary); }
.methodology-steps {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem; margin-bottom: 3rem;
}
.method-step {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  position: relative; transition: border-color var(--transition);
}
.method-step:hover { border-color: var(--accent-3); }
.method-step-n {
  font-size: 2rem; font-weight: 900; color: var(--border);
  letter-spacing: -0.05em; line-height: 1; margin-bottom: 0.75rem;
}
.method-step-icon { font-size: 1.5rem; margin-bottom: 0.75rem; }
.method-step-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.5rem; }
.method-step-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }

.principles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px,1fr)); gap: 1rem; }
.principle-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  display: flex; gap: 1rem; align-items: flex-start;
}
.principle-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 0.1rem; }
.principle-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.3rem; }
.principle-desc { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

/* ─── CONTACT ────────────────────────────────────────────── */
#contact {
  background: var(--bg-secondary);
  text-align: center;
}
.contact-inner { max-width: 600px; margin: 0 auto; }
.contact-links { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }
.contact-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-primary); padding: 0.75rem 1.5rem; border-radius: 8px;
  text-decoration: none; font-weight: 600; font-size: 0.9rem;
  transition: all var(--transition);
}
.contact-link:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ─── MODAL OVERLAY ──────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.85); backdrop-filter: blur(8px);
  display: none; align-items: flex-start; justify-content: center;
  padding: 2rem 1rem; overflow-y: auto;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 100%; max-width: 900px;
  box-shadow: var(--shadow); position: relative;
  animation: modalIn 0.3s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: var(--bg-secondary); border: 1px solid var(--border);
  color: var(--text-secondary); width: 36px; height: 36px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1.1rem; transition: all var(--transition); z-index: 1;
}
.modal-close:hover { background: var(--bg-card-hover); color: var(--text-primary); border-color: var(--accent); }
.modal-header {
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.modal-institution { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.5rem; }
.modal-title { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 0.5rem; }
.modal-subtitle { font-size: 0.95rem; color: var(--text-secondary); }
.modal-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.modal-tag {
  background: var(--tag-bg); border: 1px solid var(--tag-border);
  color: var(--tag-text); padding: 0.25rem 0.65rem; border-radius: 5px;
  font-size: 0.75rem; font-weight: 600;
}
.modal-tag.green { background: #1a2f1a; border-color: #2ea043; color: #3fb950; }
.modal-tag.orange { background: #2f1e0d; border-color: #9a4b0f; color: var(--accent); }
.modal-tag.purple { background: #1f1a2f; border-color: #6e40c9; color: #bc8cff; }
.modal-body { padding: 2rem; }
.modal-section { margin-bottom: 2rem; }
.modal-section:last-child { margin-bottom: 0; }
.modal-section-title {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1rem;
  padding-bottom: 0.5rem; border-bottom: 1px solid var(--border);
}
.modal-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.modal-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.info-block { background: var(--bg-secondary); border-radius: var(--radius); padding: 1rem 1.25rem; }
.info-block-label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.4rem; }
.info-block-value { font-size: 0.9rem; color: var(--text-primary); line-height: 1.5; }
.modal-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; }
.modal-desc p { margin-bottom: 0.75rem; }
.modal-desc p:last-child { margin-bottom: 0; }
.modal-desc strong { color: var(--text-primary); }

/* DAX code block */
.dax-block {
  background: #0d1117; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 1rem;
}
.dax-label {
  background: var(--bg-secondary); padding: 0.4rem 1rem;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-muted); display: flex; justify-content: space-between;
}
.dax-code {
  padding: 1rem; font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 0.8rem; color: #e6edf3; overflow-x: auto; line-height: 1.7;
}
.dax-kw { color: #ff7b72; }
.dax-fn { color: #d2a8ff; }
.dax-str { color: #a5d6ff; }
.dax-num { color: #79c0ff; }
.dax-comment { color: #8b949e; font-style: italic; }
.dax-var { color: #ffa657; }
.dax-measure { color: #3fb950; }

/* KPI pills in modal */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px,1fr)); gap: 0.75rem; }
.kpi-pill {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.9rem 1rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.kpi-pill-icon { font-size: 1.2rem; flex-shrink: 0; }
.kpi-pill-name { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); }
.kpi-pill-value { font-size: 0.75rem; color: var(--text-muted); }

/* Pages list */
.pages-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.page-tag {
  background: var(--bg-secondary); border: 1px solid var(--border);
  color: var(--text-secondary); padding: 0.25rem 0.65rem; border-radius: 5px;
  font-size: 0.75rem;
}
.page-tag.active-page { border-color: var(--accent-2); color: var(--accent-2); }
.page-tag.tooltip-page { border-color: var(--accent-3); color: var(--accent-3); opacity: 0.7; font-style: italic; }
.page-tag.hidden-page { opacity: 0.4; }

/* Score arc */
.score-display {
  display: flex; align-items: center; gap: 1.5rem;
  background: var(--bg-secondary); border-radius: var(--radius); padding: 1.25rem 1.5rem;
}
.score-circle {
  width: 72px; height: 72px; border-radius: 50%; flex-shrink: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 3px solid var(--accent);
  background: radial-gradient(circle, rgba(240,136,62,0.1) 0%, transparent 70%);
}
.score-n { font-size: 1.5rem; font-weight: 900; color: var(--accent); line-height: 1; }
.score-l { font-size: 0.6rem; color: var(--text-muted); text-transform: uppercase; }
.score-breakdown { flex: 1; }
.score-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.4rem; }
.score-name { font-size: 0.72rem; color: var(--text-secondary); width: 120px; flex-shrink: 0; }
.score-track { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.score-fill { height: 100%; border-radius: 3px; background: var(--accent); transition: width 0.8s ease; }
.score-val { font-size: 0.72rem; color: var(--text-muted); width: 32px; text-align: right; }

/* Impact box */
.impact-box {
  background: rgba(63,185,80,0.07); border: 1px solid rgba(63,185,80,0.25);
  border-radius: var(--radius); padding: 1.25rem 1.5rem;
}
.impact-box-title { font-weight: 700; color: var(--accent-2); font-size: 0.85rem; margin-bottom: 0.5rem; }
.impact-box ul { padding-left: 1.25rem; color: var(--text-secondary); font-size: 0.875rem; line-height: 1.8; }
.impact-box ul li strong { color: var(--text-primary); }

/* Model diagram placeholder */
.model-diagram {
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; display: flex; align-items: center; justify-content: center;
  min-height: 120px; flex-wrap: wrap; gap: 1rem;
}
.model-table {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
  padding: 0.6rem 1rem; font-size: 0.78rem; text-align: center;
}
.model-table.fact { border-color: var(--accent); background: rgba(240,136,62,0.08); }
.model-table.dim { border-color: var(--accent-3); }
.model-table-label { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); }
.model-table-name { font-weight: 700; font-size: 0.82rem; }
.model-arrow { color: var(--text-muted); font-size: 0.9rem; }

/* ─── DISCLAIMER BAR ─────────────────────────────────────── */
.disclaimer-bar {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  background: rgba(88,166,255,0.06);
  border: 1px solid rgba(88,166,255,0.2);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  margin-bottom: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.disclaimer-icon { font-size: 0.9rem; flex-shrink: 0; margin-top: 0.05rem; }

/* ─── SCREENSHOT GALLERY ────────────────────────────────── */
.gallery-main {
  position: relative;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 0.75rem;
  cursor: zoom-in;
}
.gallery-main-img {
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  display: block;
  transition: opacity 0.2s ease;
}
.gallery-main-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.75rem 1rem 0.5rem;
  letter-spacing: 0.02em;
}
.gallery-thumbs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.gallery-thumb {
  width: 80px;
  height: 55px;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid var(--border);
  opacity: 0.6;
  transition: all var(--transition);
}
.gallery-thumb:hover { opacity: 0.9; border-color: var(--text-muted); }
.gallery-thumb.active { opacity: 1; border-color: var(--accent); }

/* ─── FOOTER ─────────────────────────────────────────────── */
footer {
  background: var(--bg-primary); border-top: 1px solid var(--border);
  padding: 2rem; text-align: center;
  color: var(--text-muted); font-size: 0.82rem;
}
footer a { color: var(--text-secondary); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ─── SCROLL TO TOP ──────────────────────────────────────── */
.scroll-top {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 999;
  background: var(--accent); color: #000; width: 40px; height: 40px;
  border-radius: 50%; display: none; align-items: center; justify-content: center;
  cursor: pointer; border: none; font-size: 1rem;
  box-shadow: 0 4px 12px rgba(240,136,62,0.4);
  transition: all var(--transition);
}
.scroll-top:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(240,136,62,0.5); }
.scroll-top.visible { display: flex; }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; top: 60px; left: 0; right: 0;
    background: var(--bg-secondary); border-bottom: 1px solid var(--border);
    padding: 1rem 2rem 1.5rem; gap: 0.75rem; z-index: 999;
  }
  .about-grid { grid-template-columns: 1fr; }
  .modal-grid-2 { grid-template-columns: 1fr; }
  .modal-grid-3 { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.25rem; }
  .score-display { flex-direction: column; text-align: center; }
  .score-name { width: 100px; }
  .modal-box { margin: 0; border-radius: var(--radius); }
  .modal-overlay { padding: 0.5rem; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  nav { padding: 0 1rem; }
  section { padding: 3.5rem 1rem; }
}

/* ─── ANIMATIONS ─────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; animation: fadeInUp 0.6s ease forwards; }
.fade-in.delay-1 { animation-delay: 0.1s; }
.fade-in.delay-2 { animation-delay: 0.2s; }
.fade-in.delay-3 { animation-delay: 0.3s; }
.fade-in.delay-4 { animation-delay: 0.4s; }