/* ===================================================================
   Abdul Khaliq — AI & Backend Systems Engineer Portfolio
   Design System: Clean Minimalist Light Mode
   Palette:
     - Background:          #FAFAFA (Soft White)
     - Primary / Surface:   #18181B (Zinc Dark) & #FFFFFF (Card Surface)
     - Accent / Highlight:  #2563EB (Royal Blue)
     - Muted Text:          #71717A (Cool Slate)
     - Primary Text:        #18181B (Zinc Dark)
     - Border Subtle:       rgba(24, 24, 27, 0.08)
     - Border Hover:        rgba(37, 99, 235, 0.4)
     - Soft Emerald:        #059669
   Vibe: Clean, minimalist, modern agency, professional developer
   Typography: Inter
   =================================================================== */

:root {
  /* Core Clean Minimalist Light Palette */
  --bg-primary: #FAFAFA;
  --bg-secondary: #F4F4F5;
  --surface-card: #FFFFFF;
  --surface-elevated: #F8FAFC;
  --surface-nav: rgba(250, 250, 250, 0.88);

  --accent-primary: #2563EB;        /* Royal Blue Accent */
  --accent-primary-hover: #1D4ED8;
  --accent-primary-subtle: rgba(37, 99, 235, 0.08);

  --accent-emerald: #059669;        /* Clean emerald accent for contact & status */
  --accent-emerald-hover: #047857;
  --accent-emerald-subtle: rgba(5, 150, 105, 0.1);

  --accent-violet: #6366F1;         /* Indigo/Violet for AI/RAG tags */
  --accent-violet-subtle: rgba(99, 102, 241, 0.08);

  --text-primary: #18181B;          /* Zinc Dark */
  --text-secondary: #52525B;        /* Neutral Slate */
  --text-muted: #71717A;            /* Cool Slate */
  --text-white: #FFFFFF;

  --border-subtle: rgba(24, 24, 27, 0.08);
  --border-card: rgba(24, 24, 27, 0.09);
  --border-hover: rgba(37, 99, 235, 0.35);
  --border-violet: rgba(99, 102, 241, 0.22);
  --border-emerald: rgba(5, 150, 105, 0.25);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-pill: 9999px;

  --shadow-subtle: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 12px 24px -4px rgba(24, 24, 27, 0.07), 0 4px 8px -2px rgba(24, 24, 27, 0.03);
  --shadow-glow: 0 0 50px -10px rgba(37, 99, 235, 0.12);

  --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 260ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
  font-size: 16px;
  color-scheme: light;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -15%, rgba(37, 99, 235, 0.05) 0%, transparent 70%),
    linear-gradient(to right, rgba(24, 24, 27, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 24, 27, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  background-repeat: no-repeat, repeat, repeat;
  background-attachment: scroll, fixed, fixed;
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Decorative Hero Element: subtle slowly floating gradient shape */
.hero-ambient-glow {
  position: absolute;
  top: 5%;
  right: 12%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle at 40% 40%, rgba(37, 99, 235, 0.09) 0%, rgba(99, 102, 241, 0.04) 45%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
  animation: subtleFloat 14s ease-in-out infinite alternate;
}

@keyframes subtleFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-18px, 20px) scale(1.04);
  }
  100% {
    transform: translate(12px, -14px) scale(0.97);
  }
}

/* Container */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.section {
  padding: 6rem 0;
  position: relative;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.75rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--accent-primary-subtle);
  border: 1px solid rgba(37, 99, 235, 0.18);
  color: var(--accent-primary);
  font-size: 0.775rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.section-title {
  font-size: clamp(2rem, 3.4vw, 2.65rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

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

/* Minimalist Card Surface */
.card-surface {
  background-color: var(--surface-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card-surface:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* ===================================================================
   NAVIGATION BAR
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 74px;
  background: var(--surface-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: background var(--transition-fast), height var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar.scrolled {
  height: 68px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: rgba(24, 24, 27, 0.1);
  box-shadow: 0 4px 12px -2px rgba(24, 24, 27, 0.04);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.015em;
  transition: opacity var(--transition-fast);
}

.brand:hover {
  opacity: 0.9;
}

.brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--text-primary);
  border: 1px solid var(--text-primary);
  color: var(--text-white);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: -0.02em;
}

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

.brand-name {
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-role {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

/* Animate active navigation underline with intentional spring-like ease */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 260ms cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-pill);
}

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

.nav-link:hover::after {
  width: 60%;
}

.nav-link.active {
  color: var(--accent-primary);
  font-weight: 600;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.15rem;
  background: var(--text-primary);
  border: 1px solid var(--text-primary);
  color: var(--text-white);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.nav-resume-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.52rem 1.05rem;
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-resume-btn:hover {
  background: var(--bg-primary);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.45rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  border-color: var(--border-hover);
  color: var(--accent-primary);
}

/* ===================================================================
   BUTTONS SYSTEM
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 220ms cubic-bezier(0.4, 0, 0.2, 1);
  font-family: var(--font-family);
  line-height: 1.25;
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Primary CTA: Royal Blue with White Text */
.btn-primary {
  background-color: var(--accent-primary);
  color: var(--text-white);
  border-color: var(--accent-primary);
  box-shadow: 0 2px 6px -1px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -2px rgba(37, 99, 235, 0.3);
}

/* Secondary Button: Zinc Dark or Clean White Card Surface */
.btn-secondary {
  background-color: var(--surface-card);
  border-color: var(--border-card);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  color: var(--accent-primary);
  background-color: var(--bg-primary);
  transform: translateY(-1px);
}

/* Outline CTA */
.btn-outline-cyan,
.btn-outline-accent {
  background-color: transparent;
  border-color: rgba(37, 99, 235, 0.3);
  color: var(--accent-primary);
}

.btn-outline-cyan:hover,
.btn-outline-accent:hover {
  background-color: var(--accent-primary-subtle);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

/* Distinctive Emerald CTA button for Contact */
.btn-emerald {
  background-color: var(--accent-emerald);
  color: var(--text-white);
  border-color: var(--accent-emerald);
  box-shadow: 0 2px 6px -1px rgba(5, 150, 105, 0.2);
}

.btn-emerald:hover {
  background-color: var(--accent-emerald-hover);
  border-color: var(--accent-emerald-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -2px rgba(5, 150, 105, 0.3);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.825rem;
  border-radius: var(--radius-sm);
}

/* ===================================================================
   HERO SECTION
   =================================================================== */
.hero-section {
  padding-top: 9.5rem;
  padding-bottom: 3.5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  align-items: center;
  gap: 3.5rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-pill);
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-subtle);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.4);
  animation: emeraldPulse 2.4s infinite;
}

@keyframes emeraldPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.4);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(5, 150, 105, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(5, 150, 105, 0);
  }
}

.hero-title {
  font-size: clamp(2.5rem, 4.6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  letter-spacing: -0.03em;
}

.hero-role-badge {
  display: inline-block;
  font-size: clamp(1.15rem, 1.9vw, 1.4rem);
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: -0.015em;
}

.hero-headline {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 580px;
  margin-bottom: 2rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

/* Hero Profile Presentation - Authentic portrait with subtle border & soft shadow */
.hero-visual-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-card-container {
  position: relative;
  width: 310px;
  max-width: 100%;
}

.profile-card {
  position: relative;
  z-index: 1;
  background-color: var(--surface-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 1.15rem;
  box-shadow: 0 16px 36px -12px rgba(24, 24, 27, 0.1), var(--shadow-glow);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.profile-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 20px 42px -10px rgba(37, 99, 235, 0.14);
}

.profile-image-box {
  width: 100%;
  height: 330px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
}

.profile-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  display: block;
}

.profile-card-footer {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.profile-info h4 {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
}

.profile-info p {
  color: var(--accent-primary);
  font-size: 0.78rem;
  font-weight: 500;
  margin-top: 0.15rem;
}

.profile-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===================================================================
   METRICS OVERVIEW SECTION
   =================================================================== */
.metrics-section {
  padding: 1rem 0 3.5rem 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.metric-card {
  padding: 1.45rem 1.35rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--surface-card);
}

.metric-icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.metric-content {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-size: clamp(1.75rem, 2.5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.metric-value .highlight {
  color: var(--accent-primary);
  font-weight: 700;
}

.metric-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 0.35rem;
  line-height: 1.35;
}

/* ===================================================================
   FEATURED PROJECTS SECTION
   =================================================================== */
.projects-section {
  position: relative;
}

.projects-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.75rem;
}

.filter-btn {
  padding: 0.45rem 1.05rem;
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.filter-btn.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: var(--text-white);
  box-shadow: 0 2px 6px -1px rgba(24, 24, 27, 0.15);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  position: relative;
  height: 100%;
  background-color: var(--surface-card);
}

.project-card.featured-wide {
  grid-column: span 2;
}

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.15rem;
}

.project-category-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.project-category-tag.cyan,
.project-category-tag.accent {
  border-color: rgba(37, 99, 235, 0.2);
  color: var(--accent-primary);
  background: var(--accent-primary-subtle);
}

.project-category-tag.violet {
  border-color: var(--border-violet);
  color: var(--accent-violet);
  background: var(--accent-violet-subtle);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.icon-btn:hover {
  border-color: var(--border-hover);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.project-subtitle {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.project-highlights-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.project-highlights {
  list-style: none;
  margin-bottom: 1.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex-grow: 1;
}

.project-highlights li {
  font-size: 0.885rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.highlight-bullet {
  color: var(--accent-primary);
  flex-shrink: 0;
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

/* Tech Stack Pills */
.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.65rem;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  transition: all var(--transition-fast);
}

.tech-pill:hover {
  border-color: var(--border-hover);
  color: var(--accent-primary);
}

/* Restrained soft violet badge for AI/RAG */
.tech-pill.pill-violet {
  border-color: var(--border-violet);
  color: var(--accent-violet);
  background: var(--accent-violet-subtle);
}

.tech-pill.pill-violet:hover {
  border-color: var(--accent-violet);
}

.project-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border-subtle);
}

/* ===================================================================
   TECHNICAL SKILLS MATRIX
   =================================================================== */
.skills-section {
  position: relative;
}

.skills-matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.skill-category-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.skill-cat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--accent-primary);
}

.skill-cat-icon.icon-violet {
  color: var(--accent-violet);
  border-color: var(--border-violet);
  background: var(--accent-violet-subtle);
}

.skill-cat-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-cat-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.skill-items-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.skill-badge:hover {
  border-color: var(--border-hover);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.skill-badge.badge-ai {
  border-color: var(--border-violet);
  background: var(--accent-violet-subtle);
  color: var(--accent-violet);
}

.skill-badge.badge-ai:hover {
  border-color: var(--accent-violet);
}

.skill-badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-primary);
}

.skill-badge.badge-ai .skill-badge-dot {
  background: var(--accent-violet);
}

/* ===================================================================
   ARCHITECTURE PHILOSOPHY SECTION
   =================================================================== */
.arch-banner {
  margin-top: 3.5rem;
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  background-color: var(--surface-card);
  border: 1px solid var(--border-card);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  box-shadow: var(--shadow-card);
}

.arch-pillar {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.arch-pillar-icon {
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.arch-pillar h4 {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
}

.arch-pillar p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

/* ===================================================================
   CONTACT & SUPABASE SECTION
   =================================================================== */
.contact-section {
  position: relative;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: flex-start;
}

.contact-info-card {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.contact-direct-list {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

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

.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--surface-card);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--border-subtle);
}

.contact-item-details {
  display: flex;
  flex-direction: column;
}

.contact-item-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.contact-item-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  word-break: break-all;
}

.copy-email-btn {
  margin-left: auto;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: all var(--transition-fast);
  font-family: var(--font-family);
}

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

/* Contact Form */
.contact-form-card {
  padding: 2.5rem;
  position: relative;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-row-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.form-label span {
  color: var(--accent-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.925rem;
  transition: all var(--transition-fast);
  outline: none;
}

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

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  background-color: #FFFFFF;
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* Alerts */
.form-alert {
  display: none;
  padding: 0.95rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.885rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.form-alert.success {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid rgba(5, 150, 105, 0.25);
  color: #065F46;
}

.form-alert.error {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #991B1B;
}

.form-alert-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.85;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: var(--text-white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.supabase-badge-note {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.85rem;
}

.supabase-badge-note svg {
  color: var(--accent-emerald);
}

/* ===================================================================
   MODAL & TOAST
   =================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(24, 24, 27, 0.45);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  width: 100%;
  max-width: 660px;
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  box-shadow: 0 24px 48px -12px rgba(24, 24, 27, 0.18);
  position: relative;
  max-height: 88vh;
  overflow-y: auto;
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  border-color: #EF4444;
  color: #EF4444;
}

.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-primary);
  border: 1px solid var(--text-primary);
  color: var(--text-white);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px -4px rgba(24, 24, 27, 0.2);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  font-size: 0.885rem;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  padding: 3.5rem 0 2rem 0;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--surface-card);
  position: relative;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.825rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.825rem;
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--accent-primary);
}

/* ===================================================================
   SCROLL REVEAL MOTION & TRANSITIONS
   =================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1), transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay helpers */
.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }
.delay-4 { transition-delay: 400ms; }

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

  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .hero-ambient-glow {
    animation: none !important;
  }
}

/* ===================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   =================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.75rem;
  }

  .hero-headline {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-visual-wrapper {
    order: -1;
  }

  .profile-card-container {
    margin: 0 auto;
  }

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

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

  .project-card.featured-wide {
    grid-column: span 1;
  }

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

  .arch-banner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.15rem;
  }

  .nav-menu {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 1.75rem;
    gap: 1.25rem;
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    box-shadow: 0 10px 25px -5px rgba(24, 24, 27, 0.1);
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .brand {
    font-size: 1rem;
    gap: 0.6rem;
  }

  .brand-badge {
    width: 34px;
    height: 34px;
    font-size: 0.85rem;
  }

  .brand-name {
    font-size: 0.95rem;
  }

  .brand-role {
    font-size: 0.7rem;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-actions .nav-cta {
    display: none;
  }

  .nav-actions .nav-resume-btn {
    padding: 0.42rem 0.85rem;
    font-size: 0.8rem;
  }

  .section {
    padding: 4rem 0;
  }

  .hero-section {
    padding-top: 6.5rem;
  }

  .status-pill {
    white-space: normal;
    text-align: center;
    max-width: 100%;
    font-size: 0.75rem;
    line-height: 1.4;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .form-row-dual {
    grid-template-columns: 1fr;
  }

  .contact-form-card,
  .contact-info-card,
  .project-card,
  .skill-category-card {
    padding: 1.4rem;
  }

  .arch-banner {
    padding: 1.5rem 1.25rem;
  }
}

@media (max-width: 540px) {
  .container {
    padding: 0 1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.65rem;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .profile-card-container {
    width: 100%;
    max-width: 290px;
    margin: 0 auto;
  }

  .profile-image-box {
    height: 300px;
  }

  .projects-filter-bar {
    gap: 0.4rem;
  }

  .filter-btn {
    font-size: 0.78rem;
    padding: 0.4rem 0.75rem;
  }
}

@media (max-width: 380px) {
  .brand-role {
    display: none;
  }

  .profile-card-container {
    max-width: 260px;
  }

  .profile-image-box {
    height: 270px;
  }

  .project-card,
  .contact-form-card,
  .contact-info-card,
  .skill-category-card {
    padding: 1.15rem;
  }
}


/* ===================================================================
   PORTFOLIO UPDATE — project media, key metrics, pending links
   =================================================================== */
.project-media {
  display: block;
  margin: 0 0 1.25rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  aspect-ratio: 16 / 9;
  max-height: 280px;
}

.project-media[hidden] {
  display: none;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.modal-diagram {
  margin: 0 0 1.25rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.modal-diagram img {
  width: 100%;
  height: auto;
  display: block;
}

.project-metric {
  display: inline-flex;
  align-items: baseline;
  align-self: flex-start;
  gap: 0.6rem;
  margin: 0 0 1.15rem 0;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
}

.project-metric-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: -0.01em;
}

.project-metric-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.link-pending {
  opacity: 0.55;
  cursor: not-allowed;
}

.project-card.is-entering {
  animation: projectCardIn 280ms ease both;
}

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

.project-footer {
  flex-wrap: wrap;
}

.section-title {
  text-wrap: balance;
}