/* =============================================================
   E.A.G.B. Corp. — Material Design 3 Portfolio
   Dark Theme · CSS Custom Properties · Mobile-First
   ============================================================= */

/* ── 1. MD3 DESIGN TOKENS ─────────────────────────────────── */
:root {
  /* --- Color: MD3 Tonal Palette (Cyan source, dark scheme) --- */
  --md-primary:             #4DD0E1;
  --md-on-primary:          #00363D;
  --md-primary-container:   #004F58;
  --md-on-primary-container:#A5EEFF;
  --md-secondary:           #80CBC4;
  --md-on-secondary:        #003733;
  --md-secondary-container: #1F4F4B;
  --md-on-secondary-container: #9CF0E9;
  --md-tertiary:            #BDC3E9;
  --md-on-tertiary:         #272D4E;
  --md-tertiary-container:  #3E4466;
  --md-on-tertiary-container:#DBE1FF;
  --md-error:               #FFB4AB;
  --md-on-error:            #690005;

  /* --- Color: Surface Roles --- */
  --md-background:          #0D1B20;
  --md-on-background:       #D5E4E9;
  --md-surface:             #0D1B20;
  --md-on-surface:          #D5E4E9;
  --md-surface-variant:     #1A2E34;
  --md-on-surface-variant:  #8DA9B0;
  --md-outline:             #3A5560;
  --md-outline-variant:     #1A2E34;

  /* --- Surface Tones (Elevation overlay in dark MD3) --- */
  --md-surface-1:           #111F25; /* 1dp  */
  --md-surface-2:           #142228; /* 3dp  */
  --md-surface-3:           #17262C; /* 6dp  */
  --md-surface-4:           #172830; /* 8dp  */
  --md-surface-5:           #192B33; /* 12dp */

  /* --- Shape (MD3 corner radii) --- */
  --shape-xs:   4px;
  --shape-sm:   8px;
  --shape-md:   12px;
  --shape-lg:   16px;
  --shape-xl:   28px;
  --shape-full: 9999px;

  /* --- Typography scale (MD3) --- */
  --font-display:  'Roboto', sans-serif;
  --font-body:     'Roboto', sans-serif;
  --font-mono:     'Roboto Mono', monospace;

  /* --- Spacing --- */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* --- Transitions --- */
  --t-fast:   150ms cubic-bezier(0.2, 0, 0, 1);
  --t-medium: 300ms cubic-bezier(0.2, 0, 0, 1);
  --t-slow:   500ms cubic-bezier(0.2, 0, 0, 1);

  /* --- Z-index layers --- */
  --z-base:   0;
  --z-raised: 10;
  --z-nav:    100;
  --z-modal:  200;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--md-on-background);
  background-color: var(--md-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 3px;
  border-radius: var(--shape-sm);
}


/* ── 3. TYPOGRAPHY ───────────────────────────────────────── */

/* Display — MD3 Display Large */
.hero__heading {
  font-family: var(--font-display);
}

/* Headline */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--md-on-surface);
}

p {
  line-height: 1.7;
  color: var(--md-on-surface-variant);
}

strong {
  font-weight: 600;
  color: var(--md-on-surface);
}

code, pre {
  font-family: var(--font-mono);
}


/* ── 4. UTILITY COMPONENTS ───────────────────────────────── */

/* Card (MD3 Filled Card) */
.card {
  background-color: var(--md-surface-1);
  border: 1px solid rgba(77, 208, 225, 0.08);
  border-radius: var(--shape-xl);
  position: relative;
  transition: transform var(--t-medium), box-shadow var(--t-medium), border-color var(--t-medium);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4),
              0 0 0 1px rgba(77, 208, 225, 0.18);
  border-color: rgba(77, 208, 225, 0.18);
}

/* Buttons (MD3) */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--shape-full);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast), background-color var(--t-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn .material-symbols-outlined {
  font-size: 1.125rem;
}

.btn--filled {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn--filled:hover {
  background-color: #6DD8E9;
  box-shadow: 0 4px 12px rgba(77, 208, 225, 0.35);
  transform: translateY(-1px);
}

.btn--filled:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn--outlined {
  background-color: transparent;
  color: var(--md-primary);
  border: 1.5px solid var(--md-outline);
}

.btn--outlined:hover {
  border-color: var(--md-primary);
  background-color: rgba(77, 208, 225, 0.08);
}

/* Chips (MD3 Assist Chip) */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  white-space: nowrap;
  transition: border-color var(--t-fast), color var(--t-fast), background-color var(--t-fast);
}

.chip .material-symbols-outlined {
  font-size: 1rem;
  color: var(--md-primary);
}

.chip:hover {
  border-color: var(--md-primary);
  color: var(--md-primary);
  background-color: rgba(77, 208, 225, 0.06);
}

/* Tags (small inline labels) */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.tag {
  display: inline-block;
  padding: 2px var(--space-3);
  border-radius: var(--shape-sm);
  background-color: rgba(77, 208, 225, 0.1);
  color: var(--md-primary);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 3px var(--space-3);
  border-radius: var(--shape-full);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge--professional {
  background-color: rgba(77, 208, 225, 0.15);
  color: var(--md-primary);
}

.badge--opensource {
  background-color: rgba(102, 187, 106, 0.15);
  color: #81C784;
}

.badge--classified {
  background-color: rgba(158, 158, 158, 0.15);
  color: #BDBDBD;
}

.badge--personal {
  background-color: rgba(255, 183, 77, 0.15);
  color: #FFB74D;
}

/* Material Symbol sizing */
.material-symbols-outlined {
  font-size: 1.25rem;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  user-select: none;
}


/* ── 5. SECTION LAYOUT ───────────────────────────────────── */
.section {
  padding: var(--space-24) 0;
}

.section__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--md-primary);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--md-on-surface);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: 1.0625rem;
  color: var(--md-on-surface-variant);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}


/* ── 6. SCROLL REVEAL ANIMATIONS ────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

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

/* Stagger children of grids */
.expertise__grid .reveal:nth-child(1) { transition-delay: 60ms; }
.expertise__grid .reveal:nth-child(2) { transition-delay: 120ms; }
.expertise__grid .reveal:nth-child(3) { transition-delay: 180ms; }
.expertise__grid .reveal:nth-child(4) { transition-delay: 240ms; }
.expertise__grid .reveal:nth-child(5) { transition-delay: 300ms; }
.expertise__grid .reveal:nth-child(6) { transition-delay: 360ms; }


/* ── 7. NAVIGATION ───────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-5) 0;
  transition: background-color var(--t-medium), box-shadow var(--t-medium), padding var(--t-medium);
}

.nav--scrolled {
  background-color: rgba(13, 27, 32, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(77, 208, 225, 0.08),
              0 2px 16px rgba(0, 0, 0, 0.4);
  padding: var(--space-3) 0;
}

.nav__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--md-on-surface);
  letter-spacing: -0.02em;
  text-decoration: none;
  transition: color var(--t-fast);
}

.nav__logo:hover {
  color: var(--md-primary);
}

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

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--shape-full);
  text-decoration: none;
  transition: color var(--t-fast), background-color var(--t-fast);
}

.nav__link:hover {
  color: var(--md-on-surface);
  background-color: rgba(255, 255, 255, 0.06);
}

.nav__link.is-active {
  color: var(--md-primary);
}

.nav__link--cta {
  background-color: var(--md-primary-container);
  color: var(--md-on-primary-container);
  margin-left: var(--space-2);
}

.nav__link--cta:hover {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
}

/* Hamburger */
.nav__burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--shape-full);
  color: var(--md-on-surface);
  transition: background-color var(--t-fast);
}

.nav__burger:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav__burger-close {
  display: none;
}

.nav__burger[aria-expanded="true"] .nav__burger-icon {
  display: none;
}

.nav__burger[aria-expanded="true"] .nav__burger-close {
  display: inline;
}


/* ── 8. HERO ─────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--space-24) + 60px) var(--space-6) var(--space-20);
  overflow: hidden;
  text-align: center;
}

/* Background layers */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Subtle dot grid */
.hero__grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(77, 208, 225, 0.15) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 100%);
}

/* Glowing orbs */
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.25;
}

.hero__orb--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #004F58 0%, transparent 70%);
  top: -150px;
  right: -100px;
  animation: orbFloat 12s ease-in-out infinite;
}

.hero__orb--2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #3E4466 0%, transparent 70%);
  bottom: 0;
  left: -80px;
  animation: orbFloat 16s ease-in-out infinite reverse;
}

.hero__orb--3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #004F58 0%, transparent 70%);
  top: 40%;
  left: 20%;
  animation: orbFloat 10s ease-in-out infinite 3s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -20px) scale(1.04); }
  66%       { transform: translate(-15px, 12px) scale(0.97); }
}

/* Floating code snippet */
.hero__code-snippet {
  position: absolute;
  right: max(40px, calc(50% - 660px));
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--md-surface-2);
  border: 1px solid rgba(77, 208, 225, 0.14);
  border-radius: var(--shape-lg);
  padding: var(--space-5) var(--space-6);
  opacity: 0.55;
  pointer-events: none;
  animation: codeDrift 20s ease-in-out infinite;
}

.hero__code-snippet pre {
  margin: 0;
}

.hero__code-snippet code {
  font-size: 0.8125rem;
  line-height: 1.8;
  display: block;
}

/* Syntax highlight colors */
.ck { color: #BDC3E9; }   /* keyword */
.cc { color: #4DD0E1; }   /* class name */
.cs { color: #80CBC4; }   /* string */
.cn { color: #FFB74D; }   /* number */
.cf { color: #A5EEFF; }   /* function */
.co { color: var(--md-on-surface-variant); } /* operator */

@keyframes codeDrift {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%       { transform: translateY(calc(-50% + 12px)) translateX(-6px); }
}

/* Hero content */
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  animation: heroFadeUp 0.8s cubic-bezier(0.2, 0, 0, 1) both;
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid rgba(77, 208, 225, 0.3);
  border-radius: var(--shape-full);
  background-color: rgba(77, 208, 225, 0.06);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--md-primary);
  text-transform: uppercase;
}

.hero__eyebrow .material-symbols-outlined {
  font-size: 1.125rem;
}

.hero__name {
  display: block;
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  color: var(--md-on-surface);
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin-bottom: var(--space-4);
}

.hero__tagline {
  display: block;
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 400;
  color: var(--md-on-surface-variant);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.hero__description {
  font-size: 1.0625rem;
  color: var(--md-on-surface-variant);
  max-width: 520px;
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* Stats row */
.hero__stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-8);
  background-color: var(--md-surface-1);
  border: 1px solid rgba(77, 208, 225, 0.1);
  border-radius: var(--shape-xl);
  margin-top: var(--space-4);
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--md-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero__stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
  margin-top: var(--space-1);
}

.hero__stat-sep {
  width: 1px;
  height: 36px;
  background-color: var(--md-outline);
  flex-shrink: 0;
}

/* Scroll cue */
.hero__scroll-cue {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-full);
  color: var(--md-on-surface-variant);
  transition: border-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
  animation: scrollBounce 2.4s ease-in-out infinite;
}

.hero__scroll-cue:hover {
  border-color: var(--md-primary);
  color: var(--md-primary);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}


/* ── 9. ABOUT ────────────────────────────────────────────── */
.about {
  background-color: var(--md-surface-variant);
  position: relative;
}

.about::before,
.about::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(77, 208, 225, 0.15), transparent);
}

.about::before { top: 0; }
.about::after  { bottom: 0; }

.about__layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-12);
  align-items: start;
}

/* Sidebar */
.about__sidebar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.about__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--md-primary-container), var(--md-tertiary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--md-primary);
  border: 2px solid rgba(77, 208, 225, 0.25);
  flex-shrink: 0;
}

.about__info-card {
  width: 100%;
  padding: var(--space-5);
}

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

.about__info-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
}

.about__info-item .material-symbols-outlined {
  font-size: 1.125rem;
  color: var(--md-primary);
  flex-shrink: 0;
}

/* Bio area */
.about__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.about__bio {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--md-on-surface-variant);
}

.about__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-2);
}


/* ── 10. EXPERTISE ───────────────────────────────────────── */
.expertise__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

.expertise__card {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.expertise__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--shape-md);
  background-color: var(--md-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.expertise__icon .material-symbols-outlined {
  font-size: 1.5rem;
  color: var(--md-on-primary-container);
}

.expertise__card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--md-on-surface);
  letter-spacing: -0.01em;
}

.expertise__card-body {
  font-size: 0.9375rem;
  color: var(--md-on-surface-variant);
  line-height: 1.65;
  flex: 1;
}


/* ── 11. PROJECTS ────────────────────────────────────────── */
.projects {
  background-color: var(--md-surface-variant);
  position: relative;
}

.projects::before,
.projects::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(77, 208, 225, 0.15), transparent);
}

.projects::before { top: 0; }
.projects::after  { bottom: 0; }

/* Filter bar */
.projects__controls {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--shape-full);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  background-color: transparent;
  border: 1.5px solid var(--md-outline);
  cursor: pointer;
  transition: all var(--t-fast);
}

.filter-btn:hover {
  border-color: var(--md-primary);
  color: var(--md-primary);
  background-color: rgba(77, 208, 225, 0.06);
}

.filter-btn--active,
.filter-btn[aria-pressed="true"] {
  background-color: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: transparent;
}

/* Project grid */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-5);
}

/* Project card */
.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform var(--t-medium), box-shadow var(--t-medium), border-color var(--t-medium), opacity var(--t-medium);
}

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

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
}

/* Header accent colors */
.ph--fintech    { background: linear-gradient(135deg, #003D30 0%, #004F44 100%); }
.ph--payments   { background: linear-gradient(135deg, #003055 0%, #00407A 100%); }
.ph--classified { background: linear-gradient(135deg, #202020 0%, #2E2E2E 100%); }
.ph--security   { background: linear-gradient(135deg, #2A1545 0%, #3D1F60 100%); }
.ph--enterprise { background: linear-gradient(135deg, #1A1A4E 0%, #272763 100%); }
.ph--safety     { background: linear-gradient(135deg, #4A1500 0%, #6B2000 100%); }
.ph--opensource { background: linear-gradient(135deg, #003540 0%, #004F5C 100%); }
.ph--ai         { background: linear-gradient(135deg, #2A1545 0%, #3D2060 100%); }
.ph--consumer   { background: linear-gradient(135deg, #4A2900 0%, #6B3D00 100%); }

.project-card__icon {
  font-size: 2rem !important;
  color: rgba(255, 255, 255, 0.5);
}

.project-card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.project-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--md-on-surface);
  letter-spacing: -0.01em;
}

.project-card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--md-primary);
  letter-spacing: 0.04em;
}

.project-card__desc {
  font-size: 0.9375rem;
  color: var(--md-on-surface-variant);
  line-height: 1.65;
  flex: 1;
}

.project-card__links {
  display: flex;
  gap: var(--space-3);
  padding-top: var(--space-2);
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--md-primary);
  text-decoration: none;
  transition: color var(--t-fast);
  padding: var(--space-1) 0;
}

.project-link:hover {
  color: #A5EEFF;
}

.project-link .material-symbols-outlined {
  font-size: 1rem;
}


/* ── 12. CONTACT ─────────────────────────────────────────── */
.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
  max-width: 900px;
  margin: 0 auto;
}

.contact__card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-8);
  text-decoration: none;
  cursor: pointer;
}

.contact__card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--shape-md);
  background-color: var(--md-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact__card-icon .material-symbols-outlined {
  font-size: 1.5rem;
  color: var(--md-on-primary-container);
}

.contact__card-title {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
  font-weight: 500;
}

.contact__card-value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--md-on-surface);
  line-height: 1.3;
}

.contact__card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-primary);
  margin-top: auto;
  padding-top: var(--space-3);
  transition: gap var(--t-fast);
}

.contact__card:hover .contact__card-cta {
  gap: var(--space-3);
}

.contact__card-cta .material-symbols-outlined {
  font-size: 1rem;
}


/* ── 13. FOOTER ──────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--md-outline-variant);
  padding: var(--space-12) 0 var(--space-8);
}

.footer__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

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

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--md-on-surface);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.footer__logo span {
  color: var(--md-primary);
}

.footer__tagline {
  font-size: 0.9rem;
  color: var(--md-on-surface-variant);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-1);
}

.footer__link {
  font-size: 0.9rem;
  color: var(--md-on-surface-variant);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--shape-sm);
  transition: color var(--t-fast), background-color var(--t-fast);
  text-decoration: none;
}

.footer__link:hover {
  color: var(--md-primary);
  background-color: rgba(77, 208, 225, 0.06);
}

.footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--md-outline-variant);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__copy,
.footer__note {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  opacity: 0.7;
}


/* ── 14. RESPONSIVE ──────────────────────────────────────── */

/* Tablet (≤ 900px) */
@media (max-width: 900px) {
  .about__layout {
    grid-template-columns: 1fr;
  }

  .about__sidebar {
    flex-direction: row;
    align-items: flex-start;
  }

  .about__avatar {
    width: 80px;
    height: 80px;
    font-size: 1.5rem;
  }

  .about__info-card {
    flex: 1;
  }

  .hero__code-snippet {
    display: none;
  }

  .expertise__grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* Mobile (≤ 640px) */
@media (max-width: 640px) {
  .section {
    padding: var(--space-16) 0;
  }

  /* Nav mobile */
  .nav__burger {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    inset: 0;
    background-color: rgba(13, 27, 32, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-3);
    z-index: calc(var(--z-nav) - 1);
    padding: var(--space-24) var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t-medium), opacity var(--t-medium);
  }

  .nav__menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    font-size: 1.25rem;
    padding: var(--space-3) var(--space-6);
  }

  /* Hero mobile */
  .hero {
    padding-top: calc(var(--space-16) + 60px);
    padding-bottom: var(--space-16);
  }

  .hero__stats {
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero__stat-sep {
    display: none;
  }

  /* About mobile */
  .about__sidebar {
    flex-direction: column;
    align-items: center;
  }

  .about__info-card {
    width: 100%;
  }

  /* Grids mobile */
  .expertise__grid,
  .projects__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  /* Footer mobile */
  .footer__nav {
    flex-direction: column;
    gap: var(--space-1);
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}