/* ─── Tech Stack Design Tokens ────────────────────────── */
:root {
  --bg: #000000;
  --panel: #111111;
  --panel-light: #161616;
  --border: rgba(201,164,76,0.12);
  --border-h: rgba(201,164,76,0.28);
  --text: #F4F1E8;
  --text-sec: #E8E4DA;
  --text-muted: #CFC9BC;
  --gold: #C9A44C;
  --gold-glow: rgba(201,164,76,0.22);
  --green: #2ecc71;
  --red: #e74c3c;
  --blue: #00c8ff;
  
  --font-serif: 'Cinzel Decorative', serif;
  --font-sans: 'DM Sans', sans-serif;
  --font-tech: 'Space Grotesk', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
  margin: 0;
}

.sk-main {
  margin-top: 0;
}

.sk-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5rem) clamp(1.25rem, 4vw, 3rem);
}

.pt-0 {
  padding-top: 0 !important;
}

.alt-bg {
  background: #000000;
  border-top: 1px solid var(--border);
}

/* ─── Typography ───────────────────────── */
.sk-eyebrow {
  display: block;
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.sk-sec-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  color: var(--text);
  margin: 0 0 1.5rem;
  line-height: 1.15;
}

.sk-sec-lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.65;
  color: var(--text-sec);
  margin-bottom: 3rem;
  max-width: 800px;
}

.sk-back-link {
  display: inline-block;
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 2rem;
  transition: color 240ms ease;
}

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

/* ─── Hero ────────────────────────────────────────────── */
.sk-hero {
  position: relative;
  min-height: 55vh;
  padding-top: 72px;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.sk-hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.sk-hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1;
}

.sk-hero .sk-container {
  position: relative;
  z-index: 2;
}

/* ─── Dashboard Search & Filters ─────────────────────── */
.tech-dashboard-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1.5rem;
  box-shadow: 0 20px 45px rgba(0,0,0,0.45);
}

/* ─── Controls Section ────────────────────────────────── */
.sk-controls-section {
  position: relative;
  background: var(--bg);
  z-index: 5;
}

.sk-controls-section .sk-container {
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
}

.search-panel-wrapper {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.search-input-box {
  flex: 1;
  min-width: 280px;
  position: relative;
  display: flex;
  align-items: center;
  background: #000000;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0.8rem 1.2rem;
  transition: all 0.3s ease;
}

.search-input-box:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 15px rgba(201, 164, 76, 0.15);
}

.search-icon {
  color: var(--text-muted);
  margin-right: 0.8rem;
  flex-shrink: 0;
}

.search-input-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-tech);
  font-size: 0.95rem;
  width: 100%;
}

.search-input-box input::placeholder {
  color: var(--text-muted);
}

.search-kbd-hint {
  font-family: var(--font-tech);
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0;
  padding: 0.15rem 0.4rem;
  margin-left: 0.5rem;
  pointer-events: none;
}

.search-counter {
  display: flex;
  align-items: center;
  font-family: var(--font-tech);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  background: #000000;
  padding: 0.85rem 1.2rem;
  border-radius: 0;
  border: 1px solid var(--border);
  height: 48px;
  box-sizing: border-box;
}

.sc-active {
  color: var(--gold);
  font-weight: 700;
  font-size: 0.85rem;
}

.sc-divider {
  color: var(--text-muted);
  margin: 0 0.25rem;
}

.sc-total {
  color: var(--text-sec);
  margin-right: 0.6rem;
}

.sc-label {
  color: var(--text-muted);
  font-weight: 600;
}

/* Category Quick Filters */
.filter-categories-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 1.2rem;
}

.filter-btn {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  color: var(--text-sec);
  border: 1px solid var(--border);
  padding: 0.45rem 0.9rem;
  border-radius: 0;
  cursor: pointer;
  transition: all 220ms ease;
}

.filter-btn:hover {
  border-color: var(--border-h);
  color: var(--text);
  background: rgba(255, 255, 255, 0.01);
}

.filter-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #000;
  font-weight: 700;
}

/* ─── Physics Simulation Sandbox Panel ─────────────────── */
.physics-sandbox-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 30px 65px rgba(0,0,0,0.65);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #000000;
  padding: 1rem 1.8rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 1rem;
}

.ph-left {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.pch-title {
  font-family: var(--font-tech);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-sec);
}

.pch-indicator {
  font-family: var(--font-tech);
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  letter-spacing: 0.05em;
}

.pch-indicator .status-pulse {
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulseLight 1.8s infinite;
}

@keyframes pulseLight {
  0% { transform: scale(0.9); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.5; }
}

.ph-right {
  display: flex;
  gap: 0.6rem;
}

.panel-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-sec);
  font-family: var(--font-tech);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.8rem;
  border-radius: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 200ms ease;
}

.panel-btn:hover {
  border-color: var(--border-h);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.panel-btn svg {
  transition: transform 0.3s ease;
}

.panel-btn:hover svg {
  transform: rotate(15deg);
}

/* Canvas Viewport */
.canvas-viewport {
  position: relative;
  width: 100%;
  height: clamp(440px, 70vh, 640px);
  background: #000;
  overflow: hidden;
}

#tech-physics-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* HUD Overlay */
.viewport-hud-overlay {
  position: absolute;
  bottom: 1.2rem;
  left: 1.2rem;
  right: 1.2rem;
  display: flex;
  justify-content: flex-start;
  gap: 2rem;
  pointer-events: none;
  font-family: var(--font-tech);
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  background: rgba(13, 13, 13, 0.8);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 0;
  width: max-content;
  max-width: calc(100% - 2.4rem);
  box-sizing: border-box;
}

.hud-item {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.hud-label {
  color: var(--text-muted);
}

.hud-val {
  color: var(--gold);
  font-weight: 600;
}

#hud-log {
  color: var(--blue);
  text-transform: uppercase;
}

/* ─── Structured Skill Index Grid ─────────────────────── */
.skills-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.tech-accessibility-category {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  transition: all 0.3s ease;
}

.tech-accessibility-category:hover {
  border-color: var(--border-h);
}

.tac-header {
  border-bottom: 1px solid rgba(255,255,255,0.04);
  padding-bottom: 0.6rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tac-title {
  font-family: 'Cinzel', serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  letter-spacing: 0.05em;
}

.tac-count {
  font-family: var(--font-tech);
  font-size: 0.68rem;
  color: var(--gold);
  background: rgba(201, 164, 76, 0.08);
  padding: 0.1rem 0.4rem;
  border-radius: 0;
  font-weight: 700;
}

.tac-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tac-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-sec);
  padding: 0.4rem 0;
  transition: color 200ms ease, transform 200ms ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.01);
}

.tac-item:hover {
  color: var(--text);
  transform: translateX(3px);
}

/* Bullets matching physics colors */
.tac-bullet {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-right: 0.6rem;
  display: inline-block;
  flex-shrink: 0;
}

.tac-item-name {
  display: flex;
  align-items: center;
  flex: 1;
  font-family: 'Cinzel', serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tac-item-tag {
  font-family: var(--font-tech);
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.3rem;
  border-radius: 2px;
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
}

/* Category matching color bullet overrides */
.bullet-languages { background: #cccccc; box-shadow: 0 0 6px rgba(220, 220, 220, 0.4); }
.bullet-frameworks { background: #c5a059; box-shadow: 0 0 6px rgba(212, 175, 55, 0.4); }
.bullet-backend { background: #b76e79; box-shadow: 0 0 6px rgba(183, 110, 121, 0.4); }
.bullet-data { background: #4a5560; box-shadow: 0 0 6px rgba(100, 110, 120, 0.4); }
.bullet-automation { background: #c59b27; box-shadow: 0 0 6px rgba(201, 164, 76, 0.5); }
.bullet-seo { background: #1e4d2b; box-shadow: 0 0 6px rgba(30, 80, 40, 0.4); }
.bullet-infrastructure { background: #825a3c; box-shadow: 0 0 6px rgba(130, 90, 60, 0.4); }
.bullet-design { background: #6a0dad; box-shadow: 0 0 6px rgba(106, 13, 173, 0.4); }

/* Filter Hidden State for Accessible Grid List */
.tech-accessibility-category.category-filtered-out {
  display: none !important;
}

.tac-item.filtered-out {
  opacity: 0.15 !important;
  text-decoration: line-through;
  pointer-events: none;
}

/* ─── Responsive Breakdown ────────────────────────────── */
@media (max-width: 980px) {
  .canvas-viewport {
    height: 500px;
  }
  
  .tech-dashboard-controls {
    padding: 1.2rem;
  }
}

@media (max-width: 768px) {
  .canvas-viewport {
    height: 700px;
  }
  
  .panel-header {
    padding: 0.8rem 1.2rem;
  }
  
  .ph-left {
    width: 100%;
    justify-content: space-between;
  }
  
  .ph-right {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  
  .search-panel-wrapper {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-counter {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .canvas-viewport {
    height: 612px;
  }
  
  .filter-btn {
    flex: 1;
    text-align: center;
    padding: 0.4rem 0.6rem;
    font-size: 0.65rem;
  }
  
  .viewport-hud-overlay {
    bottom: 0.6rem;
    left: 0.6rem;
    gap: 0.8rem;
    padding: 0.4rem 0.6rem;
  }
}

/* ─── Introductory Section ────────────────────────────── */
.sk-intro-section {
  position: relative;
  background: var(--bg);
  z-index: 5;
}

.sk-intro-section .sk-container {
  padding-bottom: 0;
}

/* ─── Integrated visual header frames (clubs.html style) ─── */
.cc-section-header {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  margin-bottom: 3.5rem;
}

.cc-header-info {
  display: flex;
  flex-direction: column;
}

.cc-header-info .sk-sec-lead {
  margin-bottom: 0;
}

.cc-header-visual {
  width: 100%;
}

.chv-frame {
  position: relative;
  aspect-ratio: 2.2 / 1;
  background: #000000;
  border: 1px solid var(--border);
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
  display: flex;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.chv-frame:hover {
  border-color: var(--border-h);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8), 0 0 15px rgba(201, 164, 76, 0.05);
}

.chv-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(0.85) contrast(1.05) brightness(0.9);
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s ease;
}

.chv-frame:hover .chv-img {
  transform: scale(1.03);
  filter: grayscale(0.2) contrast(1.02) brightness(1);
}

.chv-scanline {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0),
    rgba(201, 164, 76, 0.012) 50%,
    rgba(255, 255, 255, 0)
  );
  background-size: 100% 4px;
  pointer-events: none;
  z-index: 2;
  opacity: 0.75;
}

.chv-tag {
  position: absolute;
  bottom: 0.6rem;
  left: 0.8rem;
  font-family: var(--font-tech);
  font-size: 0.52rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  background: rgba(0, 0, 0, 0.82);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 0;
  z-index: 3;
  transition: color 0.3s ease, border-color 0.3s ease;
  text-transform: uppercase;
}

.chv-frame:hover .chv-tag {
  color: var(--gold);
  border-color: var(--border-h);
}

.chv-corner {
  position: absolute;
  width: 6px;
  height: 6px;
  border: 1px solid rgba(201, 164, 76, 0.22);
  z-index: 3;
  pointer-events: none;
  transition: border-color 0.3s ease;
}

.chv-frame:hover .chv-corner {
  border-color: rgba(201, 164, 76, 0.5);
}

.chv-corner.tl { top: 0.6rem; left: 0.8rem; border-right: none; border-bottom: none; }
.chv-corner.tr { top: 0.6rem; right: 0.8rem; border-left: none; border-bottom: none; }

.chv-glare {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 50%, transparent 100%);
  pointer-events: none;
  z-index: 2;
}

@media (max-width: 980px) {
  .cc-section-header {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }
  
  .chv-frame {
    max-width: 500px;
    margin: 0 auto;
    aspect-ratio: 2.8 / 1;
  }
}