/* ==========================================================================
   Mohammad Azeem Mahmood — Portfolio Stylesheet
   Design system: dark, professional, restrained. All values driven by
   CSS custom properties so the theme can be edited from one place.
   ========================================================================== */

:root {
  /* Backgrounds */
  --bg-body: #0a0e16;
  --bg-alt: #0d1220;
  --bg-surface: #121828;
  --bg-surface-2: #161d30;
  --bg-elevated: #1a2236;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* Text */
  --text-primary: #eef1f6;
  --text-secondary: #a7b0c0;
  --text-muted: #707a8c;

  /* Accent */
  --accent: #4f8cff;
  --accent-strong: #6ea1ff;
  --accent-dim: rgba(79, 140, 255, 0.14);
  --accent-2: #2dd4b0;
  --accent-2-dim: rgba(45, 212, 176, 0.14);

  /* Status */
  --success: #34d399;
  --error: #f87171;

  /* Typography */
  --font-heading: 'Manrope', 'Segoe UI', Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-card: 0 20px 40px -24px rgba(0, 0, 0, 0.6);
  --shadow-lift: 0 24px 60px -20px rgba(0, 0, 0, 0.7);

  /* Layout */
  --container-width: 1180px;
  --header-height: 76px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.18s var(--ease);
  --transition-base: 0.3s var(--ease);
}

/* ==========================================================================
   Reset & base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

/* Ensures any scroll target (a direct #hash link, browser back/forward,
   or a native scrollIntoView call) lands below the fixed header instead
   of underneath it — not just clicks handled by script.js. */
section[id] {
  scroll-margin-top: var(--header-height);
}

body {
  margin: 0;
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

p { margin: 0; }

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea {
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-surface);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #04101f;
  padding: var(--space-3) var(--space-5);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: #04101f;
}
.btn-primary:hover { background: var(--accent-strong); }

.btn-secondary {
  background: var(--bg-surface-2);
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-strong); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-subtle);
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--border-strong); }

.btn-small {
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--header-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
  /* Note: intentionally no background/backdrop-filter on this element.
     A `filter`/`backdrop-filter` here would make .site-header a CSS
     containing block for its position:fixed descendant (.nav-menu on
     mobile), collapsing that fullscreen menu to the header's own
     76px height instead of the viewport. The blurred backdrop is
     rendered on the ::before pseudo-element below instead, which is
     purely decorative and has no fixed-position descendants. */
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(10, 14, 22, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background var(--transition-base);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border-subtle);
}

.site-header.is-scrolled::before {
  background: rgba(10, 14, 22, 0.92);
}

.nav {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, var(--accent-dim), var(--accent-2-dim));
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--accent-strong);
  letter-spacing: 0.02em;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.25;
}

.nav-logo-sub {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-fast);
  border-radius: var(--radius-full);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link.is-active { color: var(--text-primary); }
.nav-link.is-active::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0;
}

.nav-toggle-bar {
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-9)) 0 var(--space-9);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}

.hero-glow-a {
  width: 480px;
  height: 480px;
  top: -160px;
  left: -120px;
  background: var(--accent);
}

.hero-glow-b {
  width: 420px;
  height: 420px;
  bottom: -200px;
  right: -100px;
  background: var(--accent-2);
  opacity: 0.22;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-8);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-dim);
  border: 1px solid rgba(79, 140, 255, 0.28);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  margin-bottom: var(--space-4);
}

.hero-subhead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--text-primary);
  font-weight: 500;
  max-width: 46ch;
  margin-bottom: var(--space-4);
}

.hero-summary {
  color: var(--text-secondary);
  max-width: 58ch;
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-7);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
}

.hero-meta li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.hero-meta svg { color: var(--accent); flex-shrink: 0; }
.hero-meta a:hover { color: var(--text-primary); }

.hero-visual {
  position: relative;
}

.flow-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
  padding: var(--space-5);
}

.flow-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.flow-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}
.flow-dot:nth-child(1) { background: #f87171; opacity: 0.7; }
.flow-dot:nth-child(2) { background: #fbbf24; opacity: 0.7; }
.flow-dot:nth-child(3) { background: #34d399; opacity: 0.7; }

.flow-card-title {
  margin-left: var(--space-2);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.flow-steps li {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.flow-index {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.flow-steps strong {
  display: block;
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.flow-steps p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.stat-chip {
  position: absolute;
  display: flex;
  flex-direction: column;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-card);
}

.stat-chip-value {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-strong);
  line-height: 1;
}

.stat-chip-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
  white-space: nowrap;
}

.stat-chip-a { top: -18px; right: -14px; }
.stat-chip-b { bottom: -18px; left: -14px; }

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: var(--space-5);
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: floatCue 2.4s ease-in-out infinite;
}

@keyframes floatCue {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 6px); }
}

/* ==========================================================================
   Sections (shared)
   ========================================================================== */

.section {
  padding: var(--space-9) 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-7);
  text-align: center;
}

.section-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: var(--space-3);
}

.section-title-sm {
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  margin-bottom: var(--space-5);
}

.section-lead {
  color: var(--text-secondary);
  font-size: 1.02rem;
}

/* ==========================================================================
   Snapshot
   ========================================================================== */

.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.snapshot-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

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

.snapshot-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.snapshot-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-2);
}

.snapshot-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.fact-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-7);
}

.fact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}

.fact-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.fact-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

.fact-divider {
  width: 1px;
  height: 40px;
  background: var(--border-subtle);
}

/* ==========================================================================
   Expertise
   ========================================================================== */

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.expertise-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

.expertise-card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 140, 255, 0.35);
  background: var(--bg-surface-2);
}

.expertise-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--accent-2-dim);
  color: var(--accent-2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.expertise-card h3 {
  font-size: 1.02rem;
  margin-bottom: var(--space-2);
}

.expertise-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-left: var(--space-6);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent 95%);
}

.timeline-item { position: relative; }

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-6));
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

.timeline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  transition: border-color var(--transition-base);
}

.timeline-card:hover { border-color: var(--border-strong); }

.timeline-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.timeline-card-head h3 {
  font-size: 1.15rem;
  margin-bottom: 2px;
}

.timeline-org {
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 600;
}

.timeline-date {
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.timeline-list { display: flex; flex-direction: column; gap: var(--space-2); }

.timeline-list li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.timeline-list li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent-2);
}

/* ==========================================================================
   Projects
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

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

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.project-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-2);
  background: var(--accent-2-dim);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
}

.project-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.project-card h3 {
  font-size: 1.25rem;
}

.project-org {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: -8px;
}

.project-block h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.project-block p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.project-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.project-chips span {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
}

.project-outcome {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  background: var(--accent-2-dim);
  border: 1px solid rgba(45, 212, 176, 0.25);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin-top: auto;
}

.project-outcome svg { color: var(--accent-2); flex-shrink: 0; margin-top: 2px; }
.project-outcome p { color: var(--text-primary); font-size: 0.9rem; font-weight: 500; }

/* ==========================================================================
   Documentation lifecycle
   ========================================================================== */

.lifecycle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.lifecycle-step {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-5);
  position: relative;
}

.lifecycle-step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -2px;
  top: 50%;
  width: 40px;
  height: 1px;
  background: var(--border-strong);
  transform: translateY(-50%);
}

.lifecycle-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--accent);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.lifecycle-step span:last-child {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.doc-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

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

.doc-abbr {
  display: inline-flex;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--accent-strong);
  background: var(--accent-dim);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.doc-card h3 {
  font-size: 0.98rem;
  margin-bottom: var(--space-2);
}

.doc-card p {
  font-size: 0.87rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Tools & skills
   ========================================================================== */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.tools-group {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.tools-group h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-2);
  margin-bottom: var(--space-4);
}

.tools-list { display: flex; flex-direction: column; gap: var(--space-3); }

.tools-list li {
  font-size: 0.95rem;
  color: var(--text-primary);
  padding-left: var(--space-4);
  position: relative;
}

.tools-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.soft-skills {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.soft-skills h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-2);
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Credentials (certifications + education)
   ========================================================================== */

.cred-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.cert-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cert-card {
  display: flex;
  gap: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  align-items: flex-start;
}

.cert-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cert-card h3 {
  font-size: 0.98rem;
  margin-bottom: 4px;
}

.cert-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.lang-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lang-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
}

.lang-item span:first-child {
  font-weight: 600;
}

.lang-level {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-7);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

a.contact-info-item:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.contact-info-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-info-item > span:last-child {
  display: flex;
  flex-direction: column;
  overflow-wrap: anywhere;
  font-size: 0.94rem;
}

.contact-form {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-row label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-row input,
.form-row textarea {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  outline: none;
}

.form-row.has-error input,
.form-row.has-error textarea {
  border-color: var(--error);
}

.form-error {
  min-height: 1.1em;
  font-size: 0.8rem;
  color: var(--error);
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-submit {
  justify-content: center;
  margin-top: var(--space-2);
}

.form-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  font-size: 0.9rem;
  text-align: center;
  min-height: 1.2em;
}

.form-status.is-success { color: var(--success); }
.form-status.is-error { color: var(--error); }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-7);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding-bottom: var(--space-6);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-name {
  font-weight: 700;
  font-size: 0.98rem;
}

.footer-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--text-primary); }

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-5) 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  :root { --container-width: 940px; }

  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 480px; margin: 0 auto; width: 100%; }
  .hero-actions { justify-content: flex-start; }

  .snapshot-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .project-grid { grid-template-columns: 1fr; }
  .cred-columns { grid-template-columns: 1fr; gap: var(--space-7); }
  .contact-grid { grid-template-columns: 1fr; }

  .fact-strip { flex-wrap: wrap; gap: var(--space-5); }
  .fact-item { flex: 1 1 40%; }
  .fact-divider { display: none; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 22, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-6);
    padding: var(--space-7) var(--space-5);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }

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

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
  }

  .nav-link { font-size: 1.1rem; }
  .nav-cv { align-self: flex-start; }
}

@media (max-width: 720px) {
  :root { --space-9: 3.5rem; --space-8: 2.5rem; }

  .hero { padding-top: calc(var(--header-height) + var(--space-6)); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .hero-meta { flex-direction: column; gap: var(--space-3); }

  .snapshot-grid { grid-template-columns: 1fr; }
  .expertise-grid { grid-template-columns: 1fr; }
  .doc-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }

  .lifecycle { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .lifecycle-step { padding: 0; }
  .lifecycle-step:not(:last-child)::after { display: none; }

  .timeline { padding-left: var(--space-5); }
  .timeline-marker { left: calc(-1 * var(--space-5)); }
  .timeline-card { padding: var(--space-4); }
  .timeline-card-head { flex-direction: column; align-items: flex-start; }

  .fact-strip { padding: var(--space-5); }
  .fact-item { flex: 1 1 100%; }

  .footer-inner { flex-direction: column; align-items: flex-start; text-align: left; }
}

@media (max-width: 420px) {
  .hero-title { font-size: 2.1rem; }
  .container { padding: 0 var(--space-4); }
  .contact-form { padding: var(--space-5); }
}