/* ==========================================================================
   PORTFOLIO & INTERACTIVE CV — MASTER STYLESHEET (css/style.css)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN SYSTEM & CSS CUSTOM PROPERTIES
   -------------------------------------------------------------------------- */
:root {
  /* Core Brand Palette (Editable in one place) */
  --primary-color: #007bff;
  --primary-hover: #0062cc;
  --primary-soft: rgba(0, 123, 255, 0.12);
  --primary-border: rgba(0, 123, 255, 0.32);

  --dark-color: #111827;
  --light-color: #f8fafc;
  --text-color: #1f2937;
  --white-color: #ffffff;

  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;

  /* Light Mode Semantic Surface Tokens (Default when data-theme="light") */
  --bg-canvas: var(--light-color);
  --bg-alt: #f1f5f9;
  --bg-surface: var(--white-color);
  --bg-surface-elevated: #ffffff;
  --bg-header: rgba(248, 250, 252, 0.88);

  --text-primary: var(--dark-color);
  --text-secondary: var(--text-color);
  --text-muted: #64748b;

  --border-hairline: rgba(17, 24, 39, 0.08);
  --border-strong: rgba(17, 24, 39, 0.15);

  --shadow-card: 0 12px 32px -8px rgba(17, 24, 39, 0.06);
  --shadow-hover: 0 20px 40px -12px rgba(0, 123, 255, 0.14);
  --shadow-modal: 0 25px 60px -15px rgba(0, 0, 0, 0.35);

  /* Typography Families (2+1 Font Rule) */
  --font-display: 'Syne', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spatial & Radius Scale (r_inner = r_outer - padding) */
  --container-max: 1200px;
  --header-height: 76px;
  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;

  /* Motion & Interaction Budget */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
  --duration-normal: 280ms;
}

/* Dark Mode Semantic Overrides */
[data-theme="dark"] {
  --bg-canvas: var(--dark-color);
  --bg-alt: #0b111e;
  --bg-surface: #182235;
  --bg-surface-elevated: #1e293b;
  --bg-header: rgba(17, 24, 39, 0.88);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --border-hairline: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --shadow-card: 0 14px 34px -10px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 20px 44px -12px rgba(0, 123, 255, 0.22);
}

/* --------------------------------------------------------------------------
   2. RESET, BASE TYPOGRAPHY & ACCESSIBILITY
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-secondary);
  background-color: var(--bg-canvas);
  overflow-x: hidden;
  transition: background-color var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out);
}

[data-theme="dark"] body {
  letter-spacing: 0.005em;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
  text-wrap: balance;
}

p {
  margin-bottom: 1rem;
  max-width: 70ch;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.text-accent {
  color: var(--primary-color);
}

/* Visible Keyboard Focus Ring (WCAG AA) */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 3px;
}

/* Skip Link */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 10px 18px;
  background: var(--primary-color);
  color: var(--white-color);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: 14px;
}

/* --------------------------------------------------------------------------
   3. LAYOUT CONTAINERS & SECTION HEADERS
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-header {
  margin-bottom: 56px;
  max-width: 680px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.section-title {
  font-size: clamp(1.85rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-description {
  font-size: 1.025rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   4. BUTTONS & INTERACTIVE CONTROLS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: translateY(1px);
}

.btn-sm {
  min-height: 40px;
  padding: 8px 18px;
  font-size: 0.875rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -6px rgba(0, 123, 255, 0.45);
}

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

.btn-outline:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background-color: var(--primary-soft);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   5. STICKY HEADER & NAVIGATION (3-Zone Top Bar Contract)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: var(--bg-header);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-hairline);
  transition: background-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-card);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo:hover {
  color: var(--primary-color);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 0;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-fast) var(--ease-out);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Theme Toggle Button */
.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

[data-theme="dark"] .theme-icon-dark {
  display: none;
}

[data-theme="light"] .theme-icon-light {
  display: none;
}

/* Mobile Menu Hamburger Button */
.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-surface);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

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

.mobile-menu-toggle.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

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

/* --------------------------------------------------------------------------
   6. HERO SECTION
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Subtle Animated Ambient Background */
.hero-ambient {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.16;
  animation: ambientFloat 14s ease-in-out infinite alternate;
}

.ambient-orb-1 {
  width: 420px;
  height: 420px;
  background: var(--primary-color);
  top: -80px;
  right: 8%;
}

.ambient-orb-2 {
  width: 340px;
  height: 340px;
  background: #38bdf8;
  bottom: -60px;
  left: 5%;
  animation-delay: -7s;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--border-hairline) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--border-hairline) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.55) 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.55) 0%, transparent 75%);
}

@keyframes ambientFloat {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-24px, 24px, 0) scale(1.06); }
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 64px;
  align-items: center;
}

/* Left Profile Card */
.profile-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.profile-image-wrapper {
  position: relative;
  border-radius: calc(var(--radius-xl) - 6px);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, #1e293b, #0f172a);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.profile-card:hover .profile-image {
  transform: scale(1.03);
}

.profile-card-footer {
  padding-top: 18px;
  text-align: center;
}

.availability-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--success-color);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}

.profile-location {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Right Hero Content */
.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 12px;
}

.hero-title {
  font-size: clamp(2.25rem, 4.4vw, 3.5rem);
  letter-spacing: -0.025em;
  margin-bottom: 14px;
}

.hero-typing-wrapper {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 22px;
  min-height: 2.2rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.typing-prefix {
  color: var(--text-muted);
  font-weight: 400;
}

.typing-text {
  color: var(--primary-color);
  font-family: var(--font-display);
}

.typing-cursor {
  color: var(--primary-color);
  font-weight: 400;
  animation: cursorBlink 0.9s steps(2, start) infinite;
}

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

.hero-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 62ch;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-social-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 24px;
  border-top: 1px solid var(--border-hairline);
}

.social-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.social-icon-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  transition: transform var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.social-icon-link:hover {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  color: var(--white-color);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   7. ABOUT SECTION
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.about-subtitle {
  font-size: 1.35rem;
  margin-bottom: 18px;
  line-height: 1.35;
}

.about-text {
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.about-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.info-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-hairline);
}

.info-item:nth-last-child(-n+2) {
  border-bottom: none;
  padding-bottom: 0;
}

.info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.info-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
}

.info-value a:hover {
  color: var(--primary-color);
}

.status-available {
  color: var(--success-color);
}

/* --------------------------------------------------------------------------
   8. STATISTICS / FUN FACTS SECTION
   -------------------------------------------------------------------------- */
.stats-section {
  padding: 56px 0;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  background-color: var(--bg-surface);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  padding: 16px 20px;
  border-left: 2px solid var(--primary-color);
}

.stat-number {
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-suffix {
  color: var(--primary-color);
}

.stat-title {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.stat-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   9. SERVICES SECTION
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-border);
  box-shadow: var(--shadow-hover);
}

.service-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--primary-soft);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 22px;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.service-card:hover .service-icon-wrap {
  background-color: var(--primary-color);
  color: var(--white-color);
}

.service-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.service-description {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex-grow: 1;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
}

.service-link i {
  transition: transform var(--duration-fast) var(--ease-out);
}

.service-link:hover i {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   10. RESUME TIMELINE SECTION
   -------------------------------------------------------------------------- */
.resume-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
}

.resume-col-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.resume-col-icon {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.resume-col-title {
  font-size: 1.4rem;
}

.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-item {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: transform var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.timeline-item:hover {
  transform: translateX(4px);
  border-color: var(--primary-border);
}

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--bg-canvas);
  border: 3px solid var(--primary-color);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.timeline-item:hover .timeline-marker {
  background-color: var(--primary-color);
}

.timeline-period {
  font-size: 0.8125rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-role {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.timeline-org {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   11. SKILLS SECTION
   -------------------------------------------------------------------------- */
.skills-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
}

.skills-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 34px;
}

.skills-group-title {
  font-size: 1.25rem;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-hairline);
}

.skills-subheading {
  margin-top: 34px;
}

.skill-bars {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-percent {
  font-size: 0.85rem;
  color: var(--primary-color);
}

.skill-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-alt);
  border-radius: 999px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--primary-color), #38bdf8);
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.1s var(--ease-out);
}

/* Other Knowledge Unboxed Editorial List (Zero-Pill Discipline) */
.knowledge-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.knowledge-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-hairline);
}

.knowledge-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.knowledge-index {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-color);
  padding-top: 2px;
}

.knowledge-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.knowledge-text strong {
  font-size: 0.9375rem;
  color: var(--text-primary);
}

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

/* --------------------------------------------------------------------------
   12. PORTFOLIO SECTION & FILTER TABS
   -------------------------------------------------------------------------- */
.portfolio-filters {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
  padding: 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  width: fit-content;
}

.filter-btn {
  padding: 9px 18px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.filter-btn:hover {
  color: var(--text-primary);
}

.filter-btn.active {
  background-color: var(--primary-color);
  color: var(--white-color);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.portfolio-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.portfolio-card.is-hidden {
  display: none;
}

.portfolio-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-border);
  box-shadow: var(--shadow-hover);
}

.portfolio-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #0f172a;
}

.portfolio-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

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

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(17, 24, 39, 0.85), rgba(17, 24, 39, 0.25));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.portfolio-card:hover .portfolio-overlay,
.portfolio-card:focus-within .portfolio-overlay {
  opacity: 1;
}

.portfolio-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* Unboxed Metadata with Separator (Zero-Pill Rule) */
.portfolio-meta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.portfolio-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.portfolio-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.portfolio-text-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: auto;
  width: fit-content;
}

.portfolio-text-btn:hover {
  color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   13. TESTIMONIALS CAROUSEL SECTION
   -------------------------------------------------------------------------- */
.testimonial-carousel {
  max-width: 860px;
  margin: 0 auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-card);
}

.carousel-viewport {
  overflow: hidden;
  position: relative;
}

.testimonial-slide {
  display: none;
  animation: slideFade 0.35s var(--ease-out);
}

.testimonial-slide.active {
  display: block;
}

@keyframes slideFade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.testimonial-rating {
  color: #f59e0b;
  font-size: 0.95rem;
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}

.testimonial-quote {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-primary);
  line-height: 1.65;
  margin-bottom: 28px;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 1.05rem;
  margin-bottom: 2px;
}

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

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-hairline);
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.carousel-btn:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white-color);
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background-color: var(--border-strong);
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.carousel-dot.active {
  background-color: var(--primary-color);
  transform: scale(1.3);
}

/* --------------------------------------------------------------------------
   14. BLOG SECTION
   -------------------------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.blog-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-border);
  box-shadow: var(--shadow-hover);
}

.blog-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #0f172a;
}

.blog-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

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

.blog-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.blog-title {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.blog-title-link {
  text-align: left;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}

.blog-title-link:hover {
  color: var(--primary-color);
}

.blog-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.blog-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-hairline);
}

.blog-read-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
}

.blog-read-more i {
  transition: transform var(--duration-fast) var(--ease-out);
}

.blog-read-more:hover i {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   15. CONTACT SECTION & FORM VALIDATION
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-panel,
.contact-form-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
}

.contact-panel-title {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.contact-panel-lead {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--primary-soft);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.contact-detail-content {
  display: flex;
  flex-direction: column;
}

.contact-detail-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.contact-detail-value {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-detail-value a:hover {
  color: var(--primary-color);
}

/* Form Controls */
.form-row-two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.required-mark {
  color: var(--primary-color);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.75;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.form-control.is-invalid {
  border-color: var(--danger-color);
}

.field-error {
  font-size: 0.8rem;
  color: var(--danger-color);
  margin-top: 6px;
  min-height: 1.1rem;
}

.form-feedback {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
}

.form-feedback.is-success {
  background-color: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: var(--success-color);
}

.form-feedback.is-error {
  background-color: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: var(--danger-color);
}

/* --------------------------------------------------------------------------
   16. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-hairline);
  padding: 64px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--border-hairline);
}

.footer-logo {
  display: inline-block;
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 22px;
  max-width: 44ch;
}

.footer-heading {
  font-size: 1rem;
  margin-bottom: 18px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-nav-list a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.legal-link-btn {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.legal-link-btn:hover {
  color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   17. SCROLL TO TOP BUTTON & MODALS / LIGHTBOX
   -------------------------------------------------------------------------- */
.scroll-top-btn {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background-color: var(--primary-color);
  color: var(--white-color);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-hover);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              visibility var(--duration-fast);
}

.scroll-top-btn.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background-color: var(--primary-hover);
}

/* Modal Backdrop & Container */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background-color: rgba(11, 17, 30, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.modal-backdrop[hidden] {
  display: none !important;
}

.modal-container {
  position: relative;
  width: 100%;
  max-width: 780px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-modal);
  animation: modalEnter 0.25s var(--ease-out);
}

.modal-container-article {
  max-width: 840px;
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close-btn {
  position: sticky;
  top: 0;
  float: right;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 10;
}

.modal-close-btn:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white-color);
}

.modal-hero-img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  background-color: #0f172a;
}

.modal-kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 8px;
}

.modal-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 16px;
}

.modal-tech-line {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 12px 0;
  margin: 16px 0 24px;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.article-content h4 {
  font-size: 1.2rem;
  margin: 24px 0 10px;
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.article-content ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 18px;
}

.article-content li {
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   18. SCROLL REVEAL ANIMATIONS & REDUCED MOTION
   -------------------------------------------------------------------------- */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity 0.65s var(--ease-out),
              transform 0.65s var(--ease-out);
}

.reveal-up {
  transform: translateY(24px);
}

.reveal-left {
  transform: translateX(-24px);
}

.reveal-right {
  transform: translateX(24px);
}

.reveal-up.is-revealed,
.reveal-left.is-revealed,
.reveal-right.is-revealed {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* --------------------------------------------------------------------------
   19. ADMIN CMS DASHBOARD, INLINE EDITOR & FLOATING CONTROL BAR
   -------------------------------------------------------------------------- */
.cms-admin-bar {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 1800;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--primary-color);
  border-radius: var(--radius-lg);
  padding: 10px 16px;
  box-shadow: var(--shadow-modal);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.cms-admin-bar[hidden] {
  display: none !important;
}

.cms-bar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  padding-right: 10px;
  border-right: 1px solid var(--border-strong);
}

.cms-bar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.cms-bar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.cms-bar-btn:hover,
.cms-bar-btn.is-active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white-color);
}

.cms-bar-btn-save {
  background-color: var(--success-color);
  border-color: var(--success-color);
  color: var(--white-color);
}

.cms-bar-btn-save:hover {
  background-color: #059669;
  border-color: #059669;
}

/* Inline Editing Highlights */
body.cms-inline-editing [data-cms-key] {
  outline: 1px dashed var(--primary-color);
  outline-offset: 4px;
  border-radius: 4px;
  cursor: text;
  transition: background-color var(--duration-fast);
}

body.cms-inline-editing [data-cms-key]:focus {
  outline: 2px solid var(--primary-color);
  background-color: var(--primary-soft);
}

/* CMS Dashboard Tabs & Cards */
.modal-container-cms {
  max-width: 960px;
}

.cms-tabs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-hairline);
}

.cms-tab-btn {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  background-color: var(--bg-canvas);
}

.cms-tab-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white-color);
}

.cms-tab-pane {
  display: none;
}

.cms-tab-pane.active {
  display: block;
}

.cms-item-card {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 18px;
}

.cms-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-hairline);
}

/* Toast Notification */
.cms-toast {
  position: fixed;
  top: 90px;
  right: 24px;
  z-index: 3000;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--success-color);
  color: var(--text-primary);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-modal);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              visibility var(--duration-fast);
}

.cms-toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.cms-toast.is-error {
  border-left-color: var(--danger-color);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 1 !important;
    transform: none !important;
  }
  .skill-fill {
    transition: none !important;
  }
}