/* ===========================
   CSS VARIABLES & RESET
=========================== */
:root {
  --bg: #0d0d0d;
  --surface: #151515;
  --surface2: #1e1e1e;
  --border: #2a2a2a;
  --text: #e8e4dc;
  --text-muted: #6b6b6b;
  --accent: #c8f04a;
  --accent-dim: rgba(200, 240, 74, 0.12);
  --font-display: 'Syne', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --radius: 4px;
  --transition: 0.2s ease;
  --header-h: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ===========================
   GRAIN OVERLAY
=========================== */
.grain {
  pointer-events: none;
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.03;
  z-index: 9999;
  animation: grain 8s steps(10) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0) }
  10%      { transform: translate(-2%,-3%) }
  20%      { transform: translate(3%,2%) }
  30%      { transform: translate(-1%,4%) }
  40%      { transform: translate(4%,-2%) }
  50%      { transform: translate(-3%,1%) }
  60%      { transform: translate(2%,-4%) }
  70%      { transform: translate(-4%,3%) }
  80%      { transform: translate(1%,-1%) }
  90%      { transform: translate(-2%,4%) }
}

/* ===========================
   HEADER / NAV
=========================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(13,13,13,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo .dot { color: var(--accent); }

.tab-nav {
  display: flex;
  gap: 0.25rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 1rem;
  cursor: pointer;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  position: relative;
}
.tab-btn:hover { color: var(--text); background: var(--surface2); }
.tab-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
}
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--accent);
  border-radius: 2px 2px 0 0;
}

/* ===========================
   CONTENT / PANELS
=========================== */
.content {
  flex: 1;
  padding: 4rem 2.5rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.tab-panel {
  display: none;
  animation: fadeUp 0.35s ease forwards;
}
.tab-panel.active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.4rem;
}

h1, h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
}
h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); color: #c8c4bc; font-weight: 600; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 2.5rem; }
/* h1 em removed */

/* ===========================
   ABOUT
=========================== */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  padding-top: 1rem;
}

.about-headline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tagline {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-left: 2px solid var(--border);
  padding-left: 1rem;
}

.about-body {
  padding-top: 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.welcome {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.about-body p {
  color: #a8a49e;
  line-height: 1.75;
}
.about-body strong { color: var(--text); }

.cta-row {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.cta-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #0d0d0d;
  font-weight: 700;
}
.cta-btn:hover { background: #d9ff50; border-color: #d9ff50; }
.cta-btn.outline {
  background: transparent;
  color: var(--accent);
}
.cta-btn.outline:hover { background: var(--accent-dim); }
.cta-btn.small { font-size: 0.7rem; padding: 0.4rem 0.9rem; }

/* ===========================
   SKILLS
=========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  cursor: default;
}
.skill-card:hover {
  border-color: var(--accent);
  background: var(--surface2);
  transform: translateY(-3px);
}

.skill-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.skill-icon svg,
.skill-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Logo-specific overrides for icons that need a light bg or sizing tweak */
.skill-card:has(.nginx-icon) { background: var(--surface); }
.nginx-icon img  { object-fit: contain; }
/*.esri-icon img   { object-fit: contain; } /* wine-colored → white on dark bg */
.invert-icon img  { filter: brightness(0) invert(1); } /* white on dark bg */
.suse-icon img   { object-fit: contain; }

.skill-card span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: center;
}
.skill-card:hover span { color: var(--text); }

/* ===========================
   RESUME
=========================== */
.resume-area {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pdf-controls {
  display: flex;
  justify-content: flex-end;
}

#pdfFrame {
  width: 100%;
  height: 880px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
}

/* ===========================
   CONTACT
=========================== */
.contact-intro {
  color: #a8a49e;
  margin-bottom: 2.5rem;
  font-size: 1rem;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 600px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem 1.75rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.contact-card:hover {
  border-color: var(--accent);
  background: var(--surface2);
  transform: translateX(4px);
}

.contact-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
  flex-shrink: 0;
}
.contact-icon svg { width: 100%; height: 100%; }

.contact-card > div {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
}
.contact-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.contact-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}
.contact-arrow {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: color var(--transition), transform var(--transition);
}
.contact-card:hover .contact-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* ===========================
   FOOTER
=========================== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  gap: 0.75rem;
  align-items: center;
  letter-spacing: 0.04em;
}
.footer-dot { color: var(--accent); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .skills-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 700px) {
  .site-header { padding: 0 1.25rem; }
  .tab-btn { padding: 0.4rem 0.6rem; font-size: 0.68rem; }
  .content { padding: 2.5rem 1.25rem 2rem; }
  .about-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-body { padding-top: 0; }
  .skills-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 460px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .tab-nav { gap: 0; }
}