/* ==========================================================================
   Zakir Hossain — Portfolio Stylesheet (Light Theme)
   Design tokens, base, layout, components
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. Design tokens
   --------------------------------------------------------------------------- */
:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Color — brand */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-accent: #06b6d4;
  --color-accent-2: #8b5cf6;
  --color-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 50%, #8b5cf6 100%);
  --color-gradient-text: linear-gradient(110deg, #2563eb, #06b6d4 55%, #8b5cf6);

  /* Color — neutrals (light only) */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fc;
  --color-bg-tint: #eef2ff;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-soft: #475569;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-primary: 0 8px 24px rgba(37, 99, 235, 0.28);

  /* Radius */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

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

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.25s var(--ease);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}

::selection {
  background: rgba(37, 99, 235, 0.18);
  color: var(--color-text);
}

.container {
  width: min(100% - 2.5rem, var(--container-max));
  margin-inline: auto;
}

/* ---------------------------------------------------------------------------
   3. Icons & utilities
   --------------------------------------------------------------------------- */
.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.text-gradient {
  background: var(--color-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.4rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

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

.btn:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 2px;
}

.btn--sm {
  padding: 0.55rem 1.05rem;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 0.95rem 1.9rem;
  font-size: 1.02rem;
}

.btn--block {
  width: 100%;
}

.btn--primary {
  background-image: var(--color-gradient-text);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  color: #fff;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.38);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--color-border-strong);
  color: var(--color-text);
  backdrop-filter: blur(6px);
}

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

.btn--light {
  background: #fff;
  border-color: #fff;
  color: var(--color-primary);
}

.btn--light:hover {
  color: var(--color-primary-dark);
}

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

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--icon {
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
}

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

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

/* Section scaffolding */
.section {
  padding: 6rem 0;
}

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

.section__header {
  margin-bottom: 3.5rem;
  max-width: 640px;
}

.section__header--center {
  margin-inline: auto;
  text-align: center;
}

.section__kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.9rem;
  position: relative;
  padding-left: 1.4rem;
}

.section__kicker::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1rem;
  height: 2px;
  transform: translateY(-50%);
  background: var(--color-gradient-text);
  border-radius: var(--radius-full);
}

.section__header--center .section__kicker::before {
  left: calc(50% - 7rem);
}

.section__title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 0.9rem;
}

.section__subtitle {
  color: var(--color-text-muted);
  font-size: 1.08rem;
}

.section__actions {
  margin-top: 3rem;
}

.section__actions--center {
  text-align: center;
}

/* ---------------------------------------------------------------------------
   4. Header / Navigation
   --------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.12rem;
}

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

.nav__logo-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: var(--color-gradient);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  box-shadow: var(--shadow-primary);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: auto;
}

.nav__link {
  display: block;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-full);
  color: var(--color-text-soft);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav__link:hover {
  color: var(--color-primary);
  background: var(--color-bg-tint);
}

.nav__cta {
  margin-left: 0.25rem;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.55rem;
}

.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle.is-open .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------------------------------------------------------------------------
   5. Hero
   --------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding: 5.5rem 0 6rem;
  overflow: hidden;
  background:
    radial-gradient(60rem 30rem at 110% -10%, rgba(6, 182, 212, 0.10), transparent 60%),
    radial-gradient(50rem 28rem at -20% 20%, rgba(139, 92, 246, 0.10), transparent 60%),
    var(--color-bg);
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
}

.hero__blob--1 {
  width: 420px;
  height: 420px;
  top: -140px;
  right: -80px;
  background: radial-gradient(circle, #2563eb, transparent 70%);
}

.hero__blob--2 {
  width: 380px;
  height: 380px;
  bottom: -160px;
  left: -100px;
  background: radial-gradient(circle, #06b6d4, transparent 70%);
}

.hero__grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(70rem 40rem at 50% 30%, black, transparent 75%);
  mask-image: radial-gradient(70rem 40rem at 50% 30%, black, transparent 75%);
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3rem;
}

.hero__content {
  max-width: 580px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 1rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-tint);
  color: var(--color-primary-dark);
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero__availability-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2); }
  50% { box-shadow: 0 0 0 9px rgba(34, 197, 94, 0.06); }
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.1rem;
}

.hero__subtitle {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--color-text-soft);
  min-height: 2.6rem;
  margin-bottom: 1.1rem;
}

.typewriter::after {
  content: '|';
  color: var(--color-primary);
  margin-left: 2px;
  animation: blink 0.9s steps(1) infinite;
  font-weight: 400;
}

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

.hero__description {
  color: var(--color-text-muted);
  font-size: 1.12rem;
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat__value {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--color-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat--alt .stat__value {
  -webkit-text-fill-color: var(--color-primary);
  color: var(--color-primary);
}

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

/* Hero visual — the phone mockup */
.hero__visual {
  position: relative;
  min-height: 460px;
  display: grid;
  place-items: center;
}

.phone-card {
  width: 265px;
  aspect-ratio: 9 / 19;
  border-radius: 42px;
  background: linear-gradient(160deg, #1e293b, #0f172a 65%);
  padding: 10px;
  box-shadow: 0 30px 70px rgba(15, 23, 42, 0.4), inset 0 0 0 2px rgba(255, 255, 255, 0.08);
  position: relative;
}

.phone-card__screen {
  height: 100%;
  border-radius: 34px;
  background: linear-gradient(180deg, #f0f6ff, #d9ecff);
  overflow: hidden;
  position: relative;
}

.phone-card__status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px 4px;
  color: #475569;
  font-size: 0.62rem;
  font-weight: 600;
}

.phone-card__content {
  padding: 12px 16px;
}

.phone-card__app-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.phone-card__app-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--color-gradient);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.phone-card__line {
  height: 7px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.16);
  margin-bottom: 5px;
}

.phone-card__line--sm {
  width: 70px;
}

.phone-card__line--xs {
  width: 42px;
  background: rgba(15, 23, 42, 0.09);
}

.phone-card__chart {
  display: flex;
  align-items: flex-end;
  gap: 7px;
  height: 120px;
  margin-bottom: 20px;
}

.phone-card__bar {
  flex: 1;
  border-radius: 6px 6px 3px 3px;
  background: linear-gradient(180deg, #60a5fa, #2563eb);
  opacity: 0.9;
  animation: bar-grow 1.6s var(--ease) both;
  transform-origin: bottom;
}

.phone-card__bar:nth-child(2) { background: linear-gradient(180deg, #22d3ee, #0891b2); animation-delay: 0.12s; }
.phone-card__bar:nth-child(4) { background: linear-gradient(180deg, #a78bfa, #7c3aed); animation-delay: 0.26s; }
.phone-card__bar:nth-child(6) { background: linear-gradient(180deg, #818cf8, #4f46e5); animation-delay: 0.4s; }
.phone-card__bar:nth-child(1) { animation-delay: 0.05s; }
.phone-card__bar:nth-child(3) { animation-delay: 0.19s; }
.phone-card__bar:nth-child(5) { animation-delay: 0.33s; }
.phone-card__bar:nth-child(7) { animation-delay: 0.47s; }

@keyframes bar-grow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

.phone-card__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.phone-card__mini-card {
  height: 54px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.phone-card__mini-card:nth-child(2) {
  background: rgba(6, 182, 212, 0.10);
  border-color: rgba(6, 182, 212, 0.25);
}

/* Floating chips */
.floating-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.05rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  animation: float 6s ease-in-out infinite;
}

.floating-chip code {
  color: var(--color-primary);
  font-family: var(--font-sans);
}

.floating-chip--code {
  top: 12%;
  left: -4%;
  animation-delay: 0s;
}

.floating-chip--react {
  top: 4%;
  right: 2%;
  width: 54px;
  height: 54px;
  justify-content: center;
  padding: 0;
  border-radius: 50%;
  color: #0ea5e9;
  animation-delay: 1.2s;
}

.floating-chip--react svg {
  width: 34px;
  height: 34px;
}

.floating-chip--dart {
  bottom: 10%;
  right: -4%;
  color: #0075be;
  animation-delay: 2.4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ---------------------------------------------------------------------------
   6. Skills
   --------------------------------------------------------------------------- */
.section--skills {
  background: var(--color-bg-alt);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.skill-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

.skill-card__icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-bg-tint);
  color: var(--color-primary);
  margin-bottom: 1.2rem;
}

.skill-card__icon .icon {
  width: 24px;
  height: 24px;
}

.skill-card__title {
  font-size: 1.12rem;
  margin-bottom: 1rem;
}

.skill-card__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem 0.75rem;
}

.skill-card__item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.skill-card__tick {
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-primary);
  font-size: 0.6rem;
  flex-shrink: 0;
}

/* ---------------------------------------------------------------------------
   7. Projects
   --------------------------------------------------------------------------- */
.projects-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-card__media {
  position: relative;
  overflow: hidden;
}

.project-card__placeholder {
  position: relative;
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(30rem 14rem at 80% -20%, rgba(6, 182, 212, 0.18), transparent 60%),
    radial-gradient(24rem 12rem at 10% 120%, rgba(139, 92, 246, 0.16), transparent 60%),
    linear-gradient(160deg, #eef4ff, #e8f7fb);
  display: grid;
  place-items: center;
}

.project-card__placeholder-screen {
  width: 62%;
  aspect-ratio: 9 / 16;
  max-height: 82%;
  background: linear-gradient(180deg, #f8fafc, #eef2ff);
  border: 1px solid var(--color-border);
  border-radius: 26px;
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.18);
  padding: 16px;
  transform: rotate(-6deg);
  transition: transform var(--transition);
}

.project-card:hover .project-card__placeholder-screen {
  transform: rotate(0deg) scale(1.04);
}

.placeholder-app__top {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.placeholder-app__top span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.placeholder-app__top span:nth-child(1) { background: #f87171; }
.placeholder-app__top span:nth-child(2) { background: #fbbf24; }
.placeholder-app__top span:nth-child(3) { background: #34d399; }

.placeholder-app__hero {
  height: 70px;
  border-radius: 14px;
  background: var(--color-gradient);
  margin-bottom: 14px;
}

.placeholder-app__rows div {
  height: 10px;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.2);
  margin-bottom: 8px;
}

.placeholder-app__rows div:nth-child(2) { width: 82%; }
.placeholder-app__rows div:nth-child(3) { width: 58%; background: rgba(37, 99, 235, 0.12); }

.project-card__featured-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  font-size: 0.78rem;
  font-weight: 700;
  color: #b45309;
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(15, 23, 42, 0.45);
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .project-card__overlay {
  opacity: 1;
}

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

.project-card__body {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  flex: 1;
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.project-card__title {
  font-size: 1.3rem;
  font-weight: 700;
}

.project-card__tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-bg-tint);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
}

.project-card__description {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.tech-tag {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--color-text-soft);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 0.32rem 0.7rem;
  border-radius: var(--radius-full);
}

/* Projects page: horizontal cards */
.projects-all {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  max-width: 900px;
  margin-inline: auto;
}

.project-card--row {
  flex-direction: row;
  align-items: stretch;
}

.project-card--row .project-card__media {
  flex: 0 0 40%;
}

.project-card--row .project-card__placeholder {
  aspect-ratio: auto;
  height: 100%;
  min-height: 320px;
}

.project-card--row .project-card__placeholder-screen {
  width: 46%;
  transform: rotate(0deg);
}

.project-card--row:hover .project-card__placeholder-screen {
  transform: scale(1.06);
}

.project-card--row .project-card__overlay {
  display: none;
}

.project-card--row .project-card__links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.projects-more-note {
  text-align: center;
  margin-top: 3.5rem;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------------
   8. Experience / timeline
   --------------------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 780px;
  margin-inline: auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent), var(--color-accent-2));
  border-radius: var(--radius-full);
  opacity: 0.35;
}

.timeline__item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.timeline__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.8rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.timeline__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

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

.timeline__role {
  font-size: 1.15rem;
  margin-bottom: 0.15rem;
}

.timeline__company {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.92rem;
}

.timeline__period {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-tint);
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.timeline__achievements {
  display: grid;
  gap: 0.55rem;
}

.timeline__achievements li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.timeline__achievements li::before {
  content: '›';
  position: absolute;
  left: 0;
  top: -1px;
  color: var(--color-primary);
  font-weight: 800;
}

/* ---------------------------------------------------------------------------
   9. Page header (inner pages)
   --------------------------------------------------------------------------- */
.page-header {
  padding: 5rem 0 4rem;
  text-align: center;
  background:
    radial-gradient(46rem 20rem at 50% -20%, rgba(37, 99, 235, 0.1), transparent 60%),
    var(--color-bg);
}

.page-header__title {
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.9rem;
}

.page-header__subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.page-header--error {
  padding: 9rem 0;
}

.error-page__code {
  display: block;
  font-size: clamp(5rem, 16vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  background: var(--color-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.error-page__title {
  font-size: 1.7rem;
  margin-bottom: 0.6rem;
}

.error-page__text {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.error-page__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------------------------------------------------------------------------
   10. About
   --------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3rem;
  align-items: start;
}

.about__heading {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 1.2rem;
}

.about__text {
  color: var(--color-text-soft);
  font-size: 1.06rem;
  margin-bottom: 2.2rem;
  max-width: 62ch;
}

.about__highlights {
  display: grid;
  gap: 1.1rem;
  margin-bottom: 2.5rem;
}

.about__highlight {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.about__highlight-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--color-bg-tint);
  color: var(--color-primary);
  flex-shrink: 0;
}

.about__highlight-icon .icon {
  width: 22px;
  height: 22px;
}

.about__highlight-title {
  font-size: 1.05rem;
  margin-bottom: 0.15rem;
}

.about__highlight-text {
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
  padding: 1.6rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.about__side {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
}

.about__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.about__avatar {
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  margin: 0 auto 1.1rem;
  border-radius: 28px;
  background: var(--color-gradient);
  color: #fff;
  font-size: 1.8rem;
  font-weight: 800;
  box-shadow: var(--shadow-primary);
}

.about__card-name {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.about__card-role {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.about__card-details {
  display: grid;
  gap: 0.85rem;
  text-align: left;
  margin-bottom: 1.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--color-border);
}

.about__detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.about__detail-icon {
  width: 19px;
  height: 19px;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Education */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
  max-width: 1000px;
  margin-inline: auto;
}

.edu-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
}

.edu-card__title {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-border);
}

.edu-card__item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.edu-card__year {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: fit-content;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-tint);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
}

.edu-card__degree {
  font-size: 1rem;
  margin-bottom: 0.15rem;
}

.edu-card__school {
  color: var(--color-text-soft);
  font-size: 0.9rem;
  font-weight: 500;
}

.edu-card__details {
  color: var(--color-text-muted);
  font-size: 0.86rem;
}

.cert-list {
  display: grid;
  gap: 0.8rem;
}

.cert-list__item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-size: 0.93rem;
  font-weight: 500;
  transition: border-color var(--transition), transform var(--transition);
}

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

.cert-list__icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Tech cloud */
.stack-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
  max-width: 760px;
  margin-inline: auto;
}

.stack-cloud__tag {
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-tint);
  border: 1px solid rgba(37, 99, 235, 0.18);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
}

.stack-cloud__tag:hover {
  transform: translateY(-4px);
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

/* ---------------------------------------------------------------------------
   11. Blog
   --------------------------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

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

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

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

.blog-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(24rem 12rem at 20% 0%, rgba(37, 99, 235, 0.14), transparent 60%),
    radial-gradient(24rem 12rem at 100% 100%, rgba(6, 182, 212, 0.16), transparent 60%),
    linear-gradient(160deg, #eef2ff, #ecfeff);
  transition: transform var(--transition) var(--ease);
}

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

.blog-card__placeholder-code {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.35;
}

.blog-card__body {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  flex: 1;
}

.blog-card__meta {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.blog-card__title {
  font-size: 1.2rem;
}

.blog-card__title a {
  color: var(--color-text);
}

.blog-card__title a:hover {
  color: var(--color-primary);
}

.blog-card__excerpt {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  flex: 1;
}

.blog-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.92rem;
  margin-top: 0.4rem;
}

.blog-card__read-more .icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.blog-card__read-more:hover .icon {
  transform: translateX(4px);
}

/* ---------------------------------------------------------------------------
   12. Contact
   --------------------------------------------------------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: start;
  max-width: 1000px;
  margin-inline: auto;
}

.contact__title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.contact__text {
  color: var(--color-text-muted);
  margin-bottom: 2.2rem;
  max-width: 42ch;
}

.contact__details {
  display: grid;
  gap: 1.2rem;
  margin-bottom: 2.2rem;
}

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

.contact__detail-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-bg-tint);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__detail-icon .icon {
  width: 22px;
  height: 22px;
}

.contact__detail-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin-bottom: 0.1rem;
}

.contact__detail-value {
  color: var(--color-text);
  font-weight: 500;
}

.contact__social-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.contact__social-links {
  display: flex;
  gap: 0.7rem;
}

.contact__form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  box-shadow: var(--shadow-md);
}

.form__group {
  margin-bottom: 1.3rem;
}

/* Spam trap: off-screen but still submitted by naive bots. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.form__label {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form__required {
  color: #ef4444;
}

.form__input {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__input::placeholder {
  color: #94a3b8;
}

.form__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.form__textarea {
  resize: vertical;
  min-height: 130px;
}

.form__input.is-invalid {
  border-color: #ef4444;
}

.form__input.is-invalid:focus {
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.12);
}

.form__error {
  display: block;
  min-height: 1.1em;
  margin-top: 0.3rem;
  font-size: 0.82rem;
  color: #ef4444;
}

.form__status {
  margin-top: 1.1rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.93rem;
  font-weight: 500;
}

.form__status.is-success {
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.form__status.is-error {
  background: rgba(239, 68, 68, 0.1);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.form__status.is-loading {
  background: var(--color-bg-tint);
  color: var(--color-primary-dark);
}

/* ---------------------------------------------------------------------------
   13. CTA band
   --------------------------------------------------------------------------- */
.cta {
  padding-top: 1rem;
  padding-bottom: 5rem;
}

.cta__card {
  position: relative;
  text-align: center;
  padding: 4rem 2.5rem;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(40rem 20rem at 80% -30%, rgba(6, 182, 212, 0.3), transparent 60%),
    radial-gradient(34rem 18rem at 10% 130%, rgba(139, 92, 246, 0.28), transparent 60%),
    linear-gradient(150deg, #1e293b, #0f172a);
  color: #fff;
  overflow: hidden;
}

.cta__card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(36rem 22rem at 50% 50%, black, transparent 78%);
  mask-image: radial-gradient(36rem 22rem at 50% 50%, black, transparent 78%);
  pointer-events: none;
}

.cta__icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #7dd3fc;
}

.cta__icon .icon {
  width: 30px;
  height: 30px;
}

.cta__title {
  position: relative;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta__text {
  position: relative;
  color: rgba(255, 255, 255, 0.75);
  max-width: 540px;
  margin: 0 auto 2.2rem;
  font-size: 1.05rem;
}

.cta__actions {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta__actions .btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.28);
  color: #fff;
}

.cta__actions .btn--ghost:hover {
  border-color: #fff;
  color: #fff;
}

/* ---------------------------------------------------------------------------
   14. Footer
   --------------------------------------------------------------------------- */
.footer {
  background: #0b1220;
  color: #cbd5e1;
  padding: 4rem 0 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.footer__logo:hover {
  color: #fff;
}

.footer__logo-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: var(--color-gradient);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
}

.footer__tagline {
  color: #94a3b8;
  max-width: 34ch;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.footer__social {
  display: flex;
  gap: 0.6rem;
}

.footer__social-link {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.footer__social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-3px);
}

.footer__social-link .icon {
  width: 19px;
  height: 19px;
}

.footer__heading {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1.2rem;
}

.footer__nav {
  display: grid;
  gap: 0.6rem;
}

.footer__nav-link {
  color: #94a3b8;
  font-size: 0.95rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer__nav-link:hover {
  color: #fff;
  padding-left: 4px;
}

.footer__address p {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  color: #94a3b8;
  font-style: normal;
}

.footer__contact-link {
  color: #94a3b8;
}

.footer__contact-link:hover {
  color: #fff;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #64748b;
  font-size: 0.88rem;
}

.footer__bottom p {
  margin: 0;
  color: #64748b;
}

/* ---------------------------------------------------------------------------
   15. Reveal animation
   --------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@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 {
    opacity: 1;
    transform: none;
  }
}

/* ---------------------------------------------------------------------------
   16. Responsive
   --------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { min-height: 420px; order: -1; margin-bottom: 1rem; }
  .hero__content { max-width: 640px; }
  .about__grid { grid-template-columns: 1fr; }
  .about__side { position: static; max-width: 460px; }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card--row { flex-direction: column; }
  .project-card--row .project-card__placeholder { aspect-ratio: 16 / 10; min-height: 0; }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 4.5rem 0; }

  .nav__menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    margin-left: 0;
  }

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

  .nav__link {
    padding: 0.85rem 1rem;
    font-size: 1.05rem;
  }

  .nav__toggle {
    display: flex;
    margin-left: auto;
  }

  .nav__cta {
    display: none;
  }

  .hero { padding: 3rem 0 4.5rem; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }

  .skills-grid { grid-template-columns: 1fr; }
  .projects-featured { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .blog-card--featured { grid-column: span 1; }
  .edu-grid { grid-template-columns: 1fr; }
  .about__stats { grid-template-columns: repeat(2, 1fr); }
  .timeline__header { flex-direction: column; }
  .footer__grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .cta__card { padding: 3rem 1.5rem; }
}

@media (max-width: 480px) {
  .skill-card__list { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
}