/**
 * ==============================================================================
 * ALKAYS.UZ - REUSABLE UI COMPONENTS
 * File: assets/css/components.css
 * ==============================================================================
 */

/* 1. NAVIGATION HEADER */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: var(--z-header);
  transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(6, 9, 15, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid var(--border-card-hover);
  color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.2);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: var(--text-base);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-white);
}

.brand-domain {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-cyan-blue);
  transition: width var(--transition-normal);
  border-radius: var(--radius-full);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-white);
}

.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--text-white);
  border-color: var(--border-card-hover);
  background: rgba(56, 189, 248, 0.08);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 120px;
  background: var(--bg-elevated);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-sm);
  padding: 0.35rem;
  display: none;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
}

.lang-dropdown.show {
  display: block;
}

.lang-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.45rem 0.75rem;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.lang-option:hover,
.lang-option.active {
  color: var(--text-white);
  background: rgba(56, 189, 248, 0.15);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  z-index: var(--z-modal);
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 360px);
  height: 100vh;
  background: var(--bg-darkest);
  border-left: 1px solid var(--border-card-hover);
  padding: 6rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  z-index: var(--z-sticky);
  transition: right var(--transition-smooth);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-link {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--accent-cyan);
  padding-left: 0.5rem;
}

/* 2. BUTTONS & BADGES */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.6rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #04070d;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.45);
}

.btn-secondary {
  background: rgba(17, 24, 44, 0.8);
  color: var(--text-primary);
  border: 1px solid var(--border-card-hover);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(22, 32, 58, 0.9);
  color: var(--text-white);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.15);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--border-card-hover);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-white);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 0.95rem 2rem;
  font-size: var(--text-base);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
}

.badge-cyan {
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.25);
}

.badge-blue {
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-sky);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.tech-tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  color: var(--accent-cyan);
  border-color: rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.05);
}

/* 3. HERO SECTION */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 4rem;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-tag-wrapper {
  margin-bottom: 1.5rem;
}

.hero-tag-wrapper .section-tag {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  padding: 0.55rem 1.35rem;
  gap: 0.75rem;
  letter-spacing: 0.14em;
  font-weight: 700;
}

.hero-tag-wrapper .section-tag::before {
  width: 10px;
  height: 10px;
  box-shadow: 0 0 12px var(--accent-cyan);
}

.hero-title {
  font-size: clamp(2.4rem, 4.2vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 2rem;
}

.hero-pillars-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.25rem;
}

.pillar-chip {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.85rem;
  background: rgba(17, 24, 44, 0.6);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.pillar-chip:hover {
  border-color: var(--border-card-hover);
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.pillar-chip svg {
  width: 14px;
  height: 14px;
  color: var(--accent-cyan);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.hero-visual {
  position: relative;
}

.cad-blueprint-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 242, 254, 0.1);
}

.cad-blueprint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: rgba(6, 9, 15, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.cad-dots {
  display: flex;
  gap: 6px;
}

.cad-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.cad-dot-red { background: #ef4444; }
.cad-dot-yellow { background: #f59e0b; }
.cad-dot-green { background: #10b981; }

.cad-canvas-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
  background-color: #04070d;
}

#heroCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.cad-hud-overlay {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.85rem;
  background: rgba(6, 9, 15, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-cyan);
}

/* 4. ABOUT SECTION & METRIC CARDS */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.about-text p strong {
  color: var(--text-primary);
}

.about-key-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.75rem;
}

.key-point-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: rgba(17, 24, 44, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.key-point-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 2px;
}

.key-point-title {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.key-point-desc {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-md), 0 0 20px rgba(0, 242, 254, 0.12);
}

.metric-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-cyan-blue);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.metric-card:hover::after {
  opacity: 1;
}

.metric-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
}

.metric-icon-box svg {
  width: 22px;
  height: 22px;
}

.metric-number {
  font-size: var(--text-2xl);
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 0.35rem;
}

.metric-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* 5. EXPERTISE / SERVICES SECTION */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(0, 242, 254, 0.15);
}

.service-card-top {
  margin-bottom: 1.5rem;
}

.service-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.12), rgba(99, 102, 241, 0.12));
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 1.25rem;
  transition: all var(--transition-normal);
}

.service-card:hover .service-icon-box {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25), rgba(99, 102, 241, 0.25));
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.3);
  transform: scale(1.05);
}

.service-icon-box svg {
  width: 26px;
  height: 26px;
}

.service-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.service-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.service-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.service-bullet {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.service-bullet svg {
  width: 14px;
  height: 14px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* 6. DEDICATED SHOWCASES (CAD, TERMINAL, WEB) */
.showcase-container {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  margin-bottom: 3.5rem;
}

.cad-inspector-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  align-items: start;
}

.cad-viewport-box {
  background: #04070d;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.cad-viewport-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: rgba(10, 15, 29, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.cad-layer-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.cad-tab-btn {
  padding: 0.35rem 0.75rem;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.cad-tab-btn:hover,
.cad-tab-btn.active {
  background: rgba(0, 242, 254, 0.15);
  border-color: rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
}

.cad-canvas-screen {
  position: relative;
  width: 100%;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: 
    radial-gradient(circle at center, rgba(56, 189, 248, 0.04) 0%, transparent 70%),
    linear-gradient(to right, rgba(56, 189, 248, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(56, 189, 248, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 30px 30px, 30px 30px;
  overflow: hidden;
}

.cad-svg-drawing {
  width: 92%;
  height: 92%;
  object-fit: contain;
}

.cad-inspector-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.cad-info-card {
  background: rgba(6, 9, 15, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.cad-info-card-title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-cyan);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cad-specs-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.cad-spec-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
  padding-bottom: 0.35rem;
}

.cad-spec-val {
  color: var(--text-primary);
  font-weight: 600;
}

/* Terminal / Software Showcase */
.terminal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.terminal-window {
  background: #04070d;
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 25px rgba(0, 242, 254, 0.08);
  font-family: var(--font-mono);
}

.terminal-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: #0a0f1d;
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-title {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.terminal-tabs {
  display: flex;
  background: #080c16;
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-tab {
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
  color: var(--text-muted);
  border-right: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.terminal-tab.active {
  background: #04070d;
  color: var(--accent-cyan);
  border-top: 2px solid var(--accent-cyan);
}

.terminal-code-body {
  padding: 1.25rem;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: #e2e8f0;
  max-height: 340px;
  overflow-y: auto;
}

.code-keyword { color: #f43f5e; font-weight: 600; }
.code-func { color: #38bdf8; }
.code-str { color: #10b981; }
.code-comment { color: #64748b; font-style: italic; }
.code-num { color: #f59e0b; }

/* 7. PROJECT PORTFOLIO SECTION */
.portfolio-filter-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.5rem 1.2rem;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(17, 24, 44, 0.6);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-white);
  border-color: var(--border-card-hover);
  background: rgba(22, 32, 58, 0.8);
}

.filter-btn.active {
  color: #04070d;
  background: var(--gradient-accent);
  border-color: transparent;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.35);
  font-weight: 700;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(0, 242, 254, 0.15);
}

.project-media-box {
  position: relative;
  width: 100%;
  height: 200px;
  background: #04070d;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.project-card:hover .project-img {
  transform: scale(1.05);
}

.project-category-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 2;
}

.project-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
}

.project-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.project-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.project-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-overlay);
  backdrop-filter: blur(12px);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.open {
  display: flex;
  opacity: 1;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 242, 254, 0.2);
  display: flex;
  flex-direction: column;
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-backdrop.open .modal-card {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(6, 9, 15, 0.95);
  position: sticky;
  top: 0;
  z-index: 10;
}

.modal-close-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.3);
}

.modal-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 8. SKILLS & TECHNOLOGIES */
.skills-domain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.skill-domain-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.skill-domain-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-card-hover);
}

.skill-domain-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.skill-domain-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.skill-domain-icon svg {
  width: 20px;
  height: 20px;
}

.skill-domain-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.skill-items-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.skill-pill-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(6, 9, 15, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.skill-pill-card:hover {
  border-color: var(--border-card-hover);
  background: rgba(17, 24, 44, 0.7);
  transform: translateX(3px);
}

.skill-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.skill-level-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.08);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
}

/* 9. WORKFLOW TIMELINE */
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.workflow-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.25rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.workflow-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-md), 0 0 20px rgba(0, 242, 254, 0.1);
}

.workflow-number {
  font-size: var(--text-2xl);
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--accent-cyan);
  opacity: 0.8;
  margin-bottom: 0.85rem;
}

.workflow-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.workflow-desc {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 10. CONTACT SECTION & FORM */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--border-card-hover);
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.1);
}

.contact-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.contact-icon-box svg {
  width: 20px;
  height: 20px;
}

.contact-card-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.contact-card-value {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.contact-form-container {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card-hover);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: rgba(4, 7, 13, 0.8);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
}

.form-control.error {
  border-color: var(--accent-rose);
}

.form-error-msg {
  font-size: 0.75rem;
  color: var(--accent-rose);
  display: none;
}

.form-error-msg.visible {
  display: block;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* 11. FOOTER & BACK TO TOP */
.footer {
  background: var(--bg-darkest);
  border-top: 1px solid var(--border-subtle);
  padding-top: 4rem;
  padding-bottom: 2rem;
  position: relative;
  z-index: var(--z-base);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-top: 1rem;
  max-width: 360px;
}

.footer-title {
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-primary);
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
  transform: translateX(3px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(10, 15, 29, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card-hover);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-sticky);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--gradient-accent);
  color: #04070d;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

/* Theme Switcher Button */
.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--border-card-hover);
  background: rgba(56, 189, 248, 0.08);
}

.theme-icon-sun,
.theme-icon-moon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* By default (dark mode), show Sun icon */
.theme-icon-sun {
  display: block;
}
.theme-icon-moon {
  display: none;
}

/* In light mode, show Moon icon */
[data-theme="light"] .theme-icon-sun {
  display: none;
}
[data-theme="light"] .theme-icon-moon {
  display: block;
}

[data-theme="light"] .header.scrolled {
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .bg-grid-overlay {
  background-image: 
    linear-gradient(to right, rgba(2, 132, 199, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(2, 132, 199, 0.04) 1px, transparent 1px);
}