/* ============================================================
   NETWORK ENGINEER PORTFOLIO — DARK TERMINAL AESTHETIC
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #151d2e;
  --bg-card-hover: #1a2540;
  --text-primary: #e2e8f0;
  --text-secondary: #8b9dc3;
  --text-muted: #4a5a7a;
  --accent: #00e5a0;
  --accent-dim: rgba(0, 229, 160, 0.15);
  --accent-glow: rgba(0, 229, 160, 0.4);
  --accent-secondary: #38bdf8;
  --accent-warn: #f59e0b;
  --border: rgba(139, 157, 195, 0.12);
  --border-active: rgba(0, 229, 160, 0.3);
  --terminal-bg: #0d1117;
  --terminal-header: #161b22;
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode */
body.light-mode {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f7fafc;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #a0aec0;
  --accent: #059669;
  --accent-dim: rgba(5, 150, 105, 0.1);
  --accent-glow: rgba(5, 150, 105, 0.25);
  --border: rgba(0, 0, 0, 0.08);
  --border-active: rgba(5, 150, 105, 0.3);
  --terminal-bg: #1a202c;
  --terminal-header: #2d3748;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-display);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- Network Canvas Background --- */
#networkCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

body.light-mode #networkCanvas {
  opacity: 0.12;
}

/* --- Utility --- */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.section {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

/* --- Section Headers --- */
.section-header {
  margin-bottom: 3.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-line {
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin-top: 1rem;
  border-radius: 2px;
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

body.light-mode header {
  background: rgba(240, 244, 248, 0.85);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 1rem 0;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
  user-select: none;
}

.logo-bracket {
  color: var(--text-muted);
}

.logo-accent {
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
}

/* Tools nav dropdown */
.nav-dropdown-wrap {
  position: relative;
}

.nav-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  padding: 1rem;
  z-index: 200;
  grid-template-columns: repeat(3, 160px);
  gap: 0 1.5rem;
  min-width: 520px;
}

.nav-dropdown-wrap:hover .nav-dropdown {
  display: grid;
}

.nav-dd-group {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-bottom: 0.75rem;
}

.nav-dd-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding: 0.2rem 0.5rem 0.35rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.25rem;
}

.nav-dd-item {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-dd-item:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

/* Nav Controls (language + theme grouped) */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Language Toggle */
#langToggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  transition: var(--transition);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#langToggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Theme Toggle */
#themeToggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

#themeToggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

.theme-icon.sun { display: none; }
.theme-icon.moon { display: block; }
body.light-mode .theme-icon.sun { display: block; }
body.light-mode .theme-icon.moon { display: none; }

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding-top: 80px;
  position: relative;
}

.hero-content {
  width: 90%;
  max-width: 820px;
  margin: auto;
}

/* Terminal Window */
.hero-terminal {
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0, 229, 160, 0.05),
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 100px rgba(0, 229, 160, 0.03);
  animation: terminalIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: 0.2s;
}

@keyframes terminalIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.terminal-header {
  background: var(--terminal-header);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.75rem;
}

.terminal-body {
  padding: 1.75rem 2rem;
}

.terminal-line {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.prompt {
  color: var(--accent);
  margin-right: 0.5rem;
}

.cmd {
  color: var(--accent-secondary);
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
  min-height: 1.2em;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  min-height: 1.5em;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  max-width: 650px;
}

.cursor-line {
  margin-top: 0.5rem;
  margin-bottom: 0 !important;
}

.cursor-blink {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Hero CTA */
.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: 1s;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-primary:hover {
  box-shadow: 0 0 25px var(--accent-glow);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: 1.5s;
}

.scroll-indicator span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Certifications */
.about-certifications h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

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

.cert-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.cert-item:hover {
  border-color: var(--border-active);
  background: var(--bg-card-hover);
}

.cert-icon {
  color: var(--accent);
  flex-shrink: 0;
}

.cert-name {
  font-weight: 600;
  font-size: 0.95rem;
  display: block;
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================================
   SKILLS SECTION
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}

.skill-category:hover {
  border-color: var(--border-active);
  box-shadow: 0 0 30px rgba(0, 229, 160, 0.04);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

.skill-category-header h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 100px;
  border: 1px solid transparent;
  transition: var(--transition);
}

.skill-tag:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0, 229, 160, 0.15);
}

/* ============================================================
   PROJECTS SECTION
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--border-active);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.project-links {
  display: flex;
  gap: 0.75rem;
}

.project-link {
  color: var(--text-muted);
  transition: var(--transition);
  padding: 0.25rem;
}

.project-link:hover {
  color: var(--accent);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 100px;
}

/* ============================================================
   IP CALCULATOR
   ============================================================ */
.ipcalc-wrapper {
  max-width: 860px;
}

.ipcalc-input-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
}

.ipcalc-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.ipcalc-field label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ipcalc-field input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.ipcalc-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.ipcalc-error {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #f87171;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.ipcalc-result {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.ipcalc-row {
  display: grid;
  grid-template-columns: 180px 160px 1fr;
  gap: 0.5rem 1rem;
  padding: 0.45rem 0;
  align-items: center;
}

.ipcalc-row-inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.ipcalc-row-label {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.ipcalc-row-value {
  color: var(--accent);
  font-weight: 600;
}

.ipcalc-row-binary {
  color: var(--text-muted);
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  word-break: break-all;
}

.ipcalc-net-bit   { color: var(--accent); }
.ipcalc-host-bit  { color: var(--text-muted); }
.ipcalc-octet-sep { color: var(--border); margin: 0 0.2em; font-size: 0.75em; }

.ipcalc-divider {
  height: 1px;
  background: var(--border);
  margin: 0.6rem 0;
}

@media (max-width: 768px) {
  .ipcalc-input-row {
    flex-direction: column;
    align-items: stretch;
  }

  .ipcalc-row {
    grid-template-columns: 130px 1fr;
  }

  .ipcalc-row-binary {
    grid-column: 1 / -1;
    font-size: 0.75rem;
  }

  .ipcalc-result {
    padding: 1rem;
    overflow-x: auto;
  }
}

/* ============================================================
   TOOLS — TABS & SHARED
   ============================================================ */
.tools-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tools-tab-scroller {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
}

.tab-arrow {
  flex-shrink: 0;
  background: var(--bg-card);
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1.4rem;
  width: 36px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding-bottom: 2px;
}

.tab-arrow-right {
  border-right: none;
  border-left: 1px solid var(--border);
}

.tab-arrow:hover { color: var(--accent); background: var(--accent-dim); }
.tab-arrow:disabled { opacity: 0.2; cursor: default; }

.tools-tab-list {
  display: flex;
  overflow-x: auto;
  flex: 1;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tools-tab-list::-webkit-scrollbar { display: none; }

.tools-tab {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.85rem 1.1rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  flex-shrink: 0;
}

.tools-tab:hover { color: var(--text-primary); }

.tools-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--accent-dim);
}

.tools-panel {
  display: none;
  padding: 1.75rem 2rem;
}

.tools-panel.active { display: block; }

.tool-input-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.tool-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 160px;
}

.tool-field-sm { max-width: 120px; }

.tool-field label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.tool-field input,
.tool-field select,
.tool-select {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.tool-field input:focus,
.tool-field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }

.tool-error {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #f87171;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  margin-bottom: 1rem;
}

.tool-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.tool-hint {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1.25rem;
}

.tool-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Port Reference protocol filter */
.port-filter-row { display: flex; gap: 0.4rem; }
.port-filter {
  padding: 0.3rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}
.port-filter:hover { border-color: var(--accent); color: var(--accent); }
.port-filter.active { border-color: var(--accent); background: var(--accent-dim); color: var(--accent); font-weight: 600; }

/* Export row (splitter / VLSM) */
.tool-export-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem; }
.export-btns { display: flex; gap: 0.5rem; }
.export-btn { font-size: 0.8rem !important; padding: 0.3rem 0.85rem !important; }

/* Cert chain label */
.cert-chain-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 1.25rem 0 0.4rem;
}
.cert-chain-label:first-child { margin-top: 0; }

.tool-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.tool-table th {
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-weight: 500;
  text-align: left;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.tool-table td {
  padding: 0.5rem 0.9rem;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(139,157,195,0.06);
}

.tool-table tr:last-child td { border-bottom: none; }

.tool-table tr:hover td { background: var(--bg-card-hover); }

.tool-pager {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.pager-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.pager-btn:disabled { opacity: 0.35; cursor: default; }
.pager-btn:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }

/* VLSM */
.vlsm-rows { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; }

.vlsm-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.vlsm-row input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
  flex: 1;
}

.vlsm-row input:focus { border-color: var(--accent); }

.vlsm-del {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  flex-shrink: 0;
}

.vlsm-del:hover { border-color: #f87171; color: #f87171; }

/* IPv6 2-col row */
.ipcalc-row-2col {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0.5rem 1rem;
  padding: 0.45rem 0;
}

/* Base Converter */
.base-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Bandwidth */
.bw-grid {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.tool-input-unit {
  display: flex;
}

.tool-input-unit input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border-right: none;
  flex: 1;
}

.tool-input-unit select {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  width: auto;
  min-width: 80px;
  flex-shrink: 0;
}

.bw-result {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.bw-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
}

.bw-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bw-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

/* NAT/PAT */
.nat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* ACL */
.acl-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Code blocks */
.code-block-wrap {
  position: relative;
}

.code-block {
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  margin: 0;
}

.code-copy-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 0.5rem;
}

.code-copy-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Responsive */
@media (max-width: 768px) {
  .tools-panel { padding: 1.25rem 1rem; }
  .nat-grid, .acl-grid { grid-template-columns: 1fr; }
  .base-grid { grid-template-columns: 1fr; }
  .bw-result { grid-template-columns: 1fr; }
  .tool-field { min-width: 100%; }
  .tool-field-sm { max-width: 100%; }
  .bw-grid { flex-direction: column; }
}

/* MTU checkboxes */
.mtu-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
}

.mtu-check-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.mtu-check-item input[type=checkbox] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  cursor: pointer;
}

/* Wi-Fi Channel Planner */
.wifi-chart {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 1rem 0 0.5rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.25rem;
  overflow-x: auto;
}

.wifi-channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 44px;
  cursor: default;
}

.wifi-ch-bar {
  width: 36px;
  border-radius: 4px 4px 0 0;
  transition: height 0.3s;
}

.wifi-ch-clear  .wifi-ch-bar { background: var(--accent); }
.wifi-ch-overlap .wifi-ch-bar { background: var(--text-muted); opacity: 0.5; }
.wifi-ch-6ghz .wifi-ch-bar { background: #a78bfa; }
.wifi-ch-6ghz .wifi-ch-label { color: #a78bfa; }
.wifi-ch-6ghz .wifi-ch-freq  { color: #a78bfa; opacity: 0.75; }

.wifi-ch-label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-primary); font-weight: 600; }
.wifi-ch-freq  { font-family: var(--font-mono); font-size: 0.64rem; color: var(--text-muted); }

.wifi-5g-group { margin-bottom: 1.5rem; }
.wifi-5g-label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }
.wifi-5g-channels { display: flex; gap: 4px; align-items: flex-end; }
.wifi-6g-channels { flex-wrap: wrap; }

.wifi-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.wifi-info-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.wifi-card-green { border-color: var(--accent); }
.wifi-info-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.wifi-info-val   { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--accent); }

/* ASA Command Cheat Sheet */
.asa-section { margin-bottom: 1.75rem; }

.asa-section-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}
.asa-section-hdr .asa-section-title { margin-bottom: 0; }

.asa-section-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.asa-cmd {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-secondary);
  white-space: pre-wrap;
  word-break: break-all;
}

.asa-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Network Troubleshooting Tool */
.nettrouble-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.ntos-tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.2rem;
  flex-shrink: 0;
}

.ntos-btn {
  background: transparent;
  border: none;
  border-radius: 4px;
  padding: 0.35rem 0.9rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.ntos-btn:hover { color: var(--text-primary); background: var(--bg-card); }
.ntos-btn.active { background: var(--accent); color: #fff; }

.nt-symptom {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-style: italic;
  min-width: 140px;
}

@media (max-width: 768px) {
  .wifi-info-grid { grid-template-columns: 1fr; }
  #asaCheatContent .tool-table th:last-child,
  #asaCheatContent .tool-table td:last-child { width: 64px; }
  .nettrouble-controls { flex-direction: column; align-items: stretch; }
  #ntContent .tool-table th:first-child,
  #ntContent .tool-table td:first-child { display: none; }
}

/* ============================================================
   HIGH-VALUE TOOLS
   ============================================================ */

/* Password Generator */
.pw-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  margin: 0.75rem 0 1rem;
}
.pw-opt {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}
.pw-opt input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; }
.pw-slider { width: 100%; accent-color: var(--accent); cursor: pointer; }
#pwResults { margin-top: 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; }
.pw-result-item {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
}
.pw-value {
  flex: 1 1 0;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-secondary);
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pw-actions {
  flex-shrink: 0;
  margin-left: auto;
  padding-left: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.pw-copy-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.pw-copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.pw-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}
.pw-weak    { background: rgba(248,113,113,0.15); color: #f87171; }
.pw-medium  { background: rgba(251,191,36,0.15);  color: #fbbf24; }
.pw-strong  { background: rgba(52,211,153,0.15);  color: var(--accent); }

/* TLS Certificate Decoder */
.cert-textarea {
  width: 100%;
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}
.cert-textarea:focus { border-color: var(--accent); }
#certDecodeBtn { margin-top: 0.75rem; }
.cert-card {
  margin-top: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.cert-row {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1rem;
}
.cert-row:last-child { border-bottom: none; }
.cert-lbl {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  min-width: 130px;
  padding-top: 0.1rem;
}
.cert-val  { font-size: 0.87rem; color: var(--text-primary); flex: 1; line-height: 1.5; }
.cert-mono { font-family: var(--font-mono); font-size: 0.78rem; word-break: break-all; }
.cert-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
}
.cert-valid    { background: rgba(52,211,153,0.15);  color: var(--accent); }
.cert-expiring { background: rgba(251,191,36,0.15);  color: #fbbf24; }
.cert-expired  { background: rgba(248,113,113,0.15); color: #f87171; }
.cert-san      { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.cert-san-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  color: var(--accent-secondary);
}

/* JSON Formatter */
.json-io-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.json-textarea {
  width: 100%;
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}
.json-textarea:focus { border-color: var(--accent); }
.json-output { min-height: 320px; white-space: pre; overflow: auto; }

/* ZIA Cheat Sheet */
.zia-ref {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  font-weight: 600;
  min-width: 220px;
}

/* VoIP / SIP Reference */
.voip-code { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 700; color: var(--accent); white-space: nowrap; }
.voip-name { font-weight: 600; font-size: 0.85rem; color: var(--text-primary); }

@media (max-width: 768px) {
  .json-io-grid { grid-template-columns: 1fr; }
  .cert-lbl { min-width: 90px; font-size: 0.68rem; }
  .cert-row { flex-direction: column; gap: 0.2rem; }
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.contact-link-item:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

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

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.3s; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(280px, 85vw);
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0.25rem;
    border-left: 1px solid var(--border);
    transition: right var(--transition);
    z-index: 999;
  }

  .nav-links.open {
    right: 0;
  }

  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    justify-content: center;
  }

  .terminal-body {
    padding: 1.25rem 1.25rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .footer-left {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .hero-name {
    font-size: 1.5rem;
  }
}

/* ============================================================
   MOBILE FIXES
   ============================================================ */
@media (max-width: 768px) {

  /* --- Nav dropdown: disable CSS hover, use JS tap toggle --- */
  .nav-dropdown-wrap:hover .nav-dropdown {
    display: none;
  }
  .nav-dropdown-wrap.dd-open .nav-dropdown {
    display: flex;
    flex-direction: column;
    position: static;
    transform: none;
    min-width: unset;
    width: 100%;
    grid-template-columns: unset;
    box-shadow: none;
    border: none;
    border-top: 1px solid var(--border);
    border-radius: 0;
    padding: 0.5rem 0;
    margin-top: 0.25rem;
    gap: 0;
    max-height: 60vh;
    overflow-y: auto;
  }
  .nav-dd-group {
    margin-bottom: 0.5rem;
  }
  .nav-dd-label {
    padding: 0.4rem 1rem 0.2rem;
  }
  .nav-dd-item {
    padding: 0.45rem 1rem;
    font-size: 0.85rem;
  }

  /* --- Tool tab bar: smaller text so more tabs fit --- */
  .tools-tab {
    font-size: 0.75rem;
    padding: 0.45rem 0.7rem;
    white-space: nowrap;
  }

  /* --- Dynamic tool tables (ASA/ZIA/VoIP/Net) --- */
  .asa-section {
    overflow-x: auto;
  }

  /* --- JSON Formatter: reduce textarea height --- */
  .json-textarea {
    min-height: 160px;
  }
  .json-output {
    min-height: 160px;
  }

  /* --- Cert decoder: readable on small screens --- */
  .cert-textarea {
    font-size: 0.72rem;
  }

  /* --- Password generator: smaller count field --- */
  .pw-options {
    gap: 0.5rem 1rem;
  }
}

@media (max-width: 480px) {
  /* --- Tab arrows larger tap target --- */
  .tab-arrow {
    font-size: 1.4rem;
    padding: 0 0.5rem;
  }

  /* --- Tool tables: hide less important columns --- */
  #asaCheatContent .tool-table th:nth-child(2),
  #asaCheatContent .tool-table td:nth-child(2),
  #ziaCheatContent .tool-table th:nth-child(2),
  #ziaCheatContent .tool-table td:nth-child(2) {
    display: none;
  }

  /* --- VoIP SIP codes: hide meaning column on tiny screens --- */
  #voipContent .tool-table th:last-child,
  #voipContent .tool-table td:last-child {
    display: none;
  }
}

/* ============================================================
   MOBILE NAV OVERLAY
   ============================================================ */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition);
}

.nav-overlay.active {
  opacity: 1;
}

/* ============================================================
   SAFE AREA INSETS (NOTCHED PHONES)
   ============================================================ */
.nav-container {
  padding-left: max(0px, env(safe-area-inset-left));
  padding-right: max(0px, env(safe-area-inset-right));
}

.hero {
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
}

.footer {
  padding-bottom: max(2rem, calc(1rem + env(safe-area-inset-bottom, 0)));
}

/* ============================================================
   TOUCH ACTIVE STATES
   ============================================================ */
.btn:active {
  transform: scale(0.97);
}

.nav-link:active {
  color: var(--accent);
  background: var(--accent-dim);
}

.contact-link-item:active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ============================================================
   VERY SMALL SCREENS (≤ 360px)
   ============================================================ */
@media (max-width: 360px) {
  .section {
    padding: 55px 0;
  }

  .container {
    width: 94%;
  }

  .terminal-body {
    padding: 1rem;
  }

  .hero-role {
    font-size: 0.85rem;
  }

  .skill-category,
  .project-card {
    padding: 1.25rem;
  }

  .section-header {
    margin-bottom: 2rem;
  }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  #networkCanvas {
    display: none;
  }

  .reveal,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-terminal {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .hero-cta {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   SYSTEM DARK MODE AUTO-DETECT
   ============================================================ */
@media (prefers-color-scheme: light) {
  body:not(.theme-set) {
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f7fafc;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #a0aec0;
    --accent: #059669;
    --accent-dim: rgba(5, 150, 105, 0.1);
    --accent-glow: rgba(5, 150, 105, 0.25);
    --border: rgba(0, 0, 0, 0.08);
    --border-active: rgba(5, 150, 105, 0.3);
    --terminal-bg: #1a202c;
    --terminal-header: #2d3748;
  }

  body:not(.theme-set) header {
    background: rgba(240, 244, 248, 0.85);
  }

  body:not(.theme-set) #networkCanvas {
    opacity: 0.12;
  }
}

/* ============================================================
   SELECTION & SCROLLBAR
   ============================================================ */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}