/* ============================================
   ZENG ZHEQI - Portfolio
   Aesthetic: Clean Editorial Professional
   ============================================ */

/* - FONTS - */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* - CSS VARIABLES - */
:root {
  --c-bg: #f2f5f9;
  --c-bg-elevated: #ffffff;
  --c-bg-card: #ffffff;
  --c-bg-hover: #f8fbff;
  --c-surface: #eaf0f6;

  --c-text-primary: #10233a;
  --c-text-secondary: #3f5066;
  --c-text-tertiary: #6f7f92;
  --c-text-muted: #8f9bad;

  --c-accent: #1265ea;
  --c-accent-soft: #3f84ff;
  --c-accent-dim: rgba(18, 101, 234, 0.1);
  --c-accent-glow: rgba(18, 101, 234, 0.22);

  --c-border: #d9e2ed;
  --c-border-strong: #c8d3e0;
  --c-dot: rgba(16, 35, 58, 0.08);

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

  --fs-hero: clamp(2.7rem, 6.4vw, 5.5rem);
  --fs-h1: clamp(1.75rem, 3vw, 2.45rem);
  --fs-h2: clamp(1.6rem, 3vw, 2.35rem);
  --fs-h3: clamp(1rem, 1.3vw, 1.16rem);
  --fs-body: 0.99rem;
  --fs-small: 0.89rem;
  --fs-label: 0.76rem;
  --fs-micro: 0.69rem;

  --lh-tight: 0.92;
  --lh-heading: 1.12;
  --lh-body: 1.6;

  --ls-tight: -0.035em;
  --ls-normal: -0.01em;
  --ls-wide: 0.11em;
  --ls-ultra: 0.18em;

  --fw-light: 400;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 700;

  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-8: 3rem;
  --s-10: 4rem;
  --s-12: 5rem;
  --s-16: 5.8rem;
  --s-20: 9rem;
  --s-24: 11rem;
  --s-32: 15rem;

  --grid-gap: 1rem;
  --grid-padding: clamp(1.1rem, 3.4vw, 3rem);
  --max-width: 1040px;
  --scan-measure: 62ch;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;

  --shadow-sm: 0 8px 24px rgba(27, 60, 103, 0.08);
  --shadow-md: 0 18px 46px rgba(27, 60, 103, 0.12);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 280ms;
  --duration-slow: 600ms;
}

/* - RESET - */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 94px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-normal);
  color: var(--c-text-primary);
  background:
    radial-gradient(1200px circle at 8% -8%, rgba(18, 101, 234, 0.16), transparent 56%),
    radial-gradient(850px circle at 96% 2%, rgba(24, 189, 163, 0.1), transparent 48%),
    linear-gradient(180deg, #f8fbff 0%, var(--c-bg) 100%);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* - SOFT PAPER TEXTURE - */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.95' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
  background-repeat: repeat;
}

::selection {
  background: rgba(18, 101, 234, 0.2);
  color: var(--c-text-primary);
}

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

h1,
h2,
h3 {
  text-wrap: balance;
}

p,
li {
  text-wrap: pretty;
}

:focus-visible {
  outline: 2px solid var(--c-accent-soft);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

::-webkit-scrollbar {
  width: 9px;
}

::-webkit-scrollbar-track {
  background: #ecf1f7;
}

::-webkit-scrollbar-thumb {
  background: #c7d5e7;
  border-radius: 100px;
  border: 2px solid #ecf1f7;
}

::-webkit-scrollbar-thumb:hover {
  background: #aebfda;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(980px, calc(100% - (var(--grid-padding) * 2)));
  z-index: 1000;
  padding: 0.78rem 1.1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(201, 214, 228, 0.9);
  box-shadow: 0 10px 34px rgba(27, 60, 103, 0.14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 999px;
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.nav:hover {
  border-color: var(--c-border-strong);
  box-shadow: 0 13px 36px rgba(27, 60, 103, 0.16);
}

.nav--hidden {
  transform: translate(-50%, -155%);
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-text-secondary);
}

.nav__links {
  display: flex;
  gap: clamp(var(--s-4), 1.8vw, var(--s-8));
  list-style: none;
  align-items: center;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
  padding: 0.15rem 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--c-accent), #18bda3);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover {
  color: var(--c-text-primary);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.35rem;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 100px;
  background: var(--c-text-secondary);
  transition: all var(--duration-normal) var(--ease-out);
}

/* ============================================
   LABEL
   ============================================ */
.label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--c-text-tertiary);
  line-height: 1;
}

.label--accent {
  color: var(--c-accent);
}

.label--number {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-tertiary);
  letter-spacing: var(--ls-wide);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 82vh;
  display: grid;
  align-content: center;
  padding: clamp(6rem, 12vw, 8.5rem) var(--grid-padding) var(--s-10);
  position: relative;
  isolation: isolate;
}

.hero > *:not(.dot-grid) {
  width: min(var(--max-width), 100%);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  margin-bottom: var(--s-6);
  color: var(--c-text-secondary);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: var(--fw-regular);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--c-text-primary);
  max-width: 10ch;
}

.hero__title em {
  font-style: italic;
  color: var(--c-accent);
}

.hero__subtitle {
  margin-top: var(--s-5);
  max-width: 52ch;
  font-size: clamp(1rem, 1.2vw, 1.14rem);
  font-weight: var(--fw-regular);
  line-height: 1.58;
  color: var(--c-text-secondary);
}

.hero__cta {
  margin-top: var(--s-6);
  display: flex;
  gap: var(--s-4);
  flex-wrap: wrap;
}

.hero__btn {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 0.82rem 1.2rem;
  border-radius: 999px;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
}

.hero__btn--primary {
  background: linear-gradient(120deg, var(--c-accent), #18bda3);
  color: #ffffff;
  box-shadow: 0 14px 34px rgba(18, 101, 234, 0.24);
}

.hero__btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 38px rgba(18, 101, 234, 0.3);
}

.hero__btn--outline {
  background: rgba(255, 255, 255, 0.72);
  color: var(--c-text-primary);
  border: 1px solid var(--c-border-strong);
}

.hero__btn--outline:hover {
  border-color: var(--c-accent-soft);
  color: var(--c-accent);
  background: #ffffff;
}

.hero__meta {
  margin-top: var(--s-8);
  display: grid;
  gap: var(--grid-gap);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow-sm);
}

.hero__meta-value {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  color: var(--c-text-primary);
}

.hero__scroll-hint {
  position: absolute;
  right: clamp(1rem, 3vw, 2.6rem);
  bottom: clamp(1.1rem, 3vw, 2.2rem);
  display: flex;
  align-items: center;
  gap: 0.52rem;
  z-index: 1;
}

.hero__scroll-hint .label {
  letter-spacing: var(--ls-wide);
}

.hero__scroll-line {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  animation: scrollPulse 2s var(--ease-in-out) infinite;
}

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 1;
    transform: scaleX(1);
  }
  50% {
    opacity: 0.35;
    transform: scaleX(0.64);
  }
}

/* ============================================
   SECTION GLOBAL
   ============================================ */
.section {
  padding: var(--s-12) var(--grid-padding);
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  left: var(--grid-padding);
  right: var(--grid-padding);
  top: 0;
  border-top: 1px solid rgba(201, 214, 228, 0.88);
}

.section > * {
  width: min(var(--max-width), 100%);
  margin-inline: auto;
}

.section__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--s-8);
  gap: var(--s-6);
}

.section__title {
  font-family: var(--font-body);
  font-size: var(--fs-h1);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading);
  letter-spacing: -0.02em;
  color: var(--c-text-primary);
}

.section__count {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-accent);
  background: rgba(18, 101, 234, 0.1);
  border: 1px solid rgba(18, 101, 234, 0.2);
  border-radius: 100px;
  padding: 0.28rem 0.56rem;
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--s-6);
  align-items: start;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: clamp(1rem, 2vw, 1.6rem);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.about-grid:hover {
  border-color: var(--c-border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.about-photo {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  aspect-ratio: 3 / 4;
  border: 1px solid var(--c-border);
}

.about-photo__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(96%) contrast(1.03);
  transition: transform var(--duration-slow) var(--ease-out);
}

.about-photo:hover .about-photo__img {
  transform: scale(1.03);
}

.about-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
}

.about-content .bento__card-title {
  margin-top: var(--s-3);
  max-width: 24ch;
}

.about-content .bento__card-desc {
  margin-top: var(--s-3);
  max-width: var(--scan-measure);
  line-height: 1.62;
  color: var(--c-text-secondary);
}

.about-content .bento__card-footer {
  margin-top: var(--s-6);
  padding-top: 0;
}

/* ============================================
   BENTO GRID
   ============================================ */
.bento {
  display: grid;
  gap: var(--grid-gap);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.bento__card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: clamp(1rem, 1.6vw, 1.35rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.bento__card:hover {
  border-color: var(--c-border-strong);
  background: var(--c-bg-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.bento__card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    520px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(18, 101, 234, 0.08),
    transparent 48%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.bento__card:hover::before {
  opacity: 1;
}

.bento__card--wide { grid-column: span 8; }
.bento__card--narrow { grid-column: span 4; }
.bento__card--half { grid-column: span 6; }
.bento__card--third { grid-column: span 4; }
.bento__card--full { grid-column: span 12; }
.bento__card--two-third { grid-column: span 8; }

.bento__card--tall {
  min-height: 330px;
}

.bento__card--featured {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(246, 250, 255, 0.98)),
    var(--c-bg-card);
  border-color: rgba(18, 101, 234, 0.22);
}

.bento__card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--s-4);
}

.bento__card-top-right {
  display: flex;
  align-items: center;
  gap: var(--s-4);
}

.bento__card-links {
  display: flex;
  gap: var(--s-2);
  align-items: center;
}

.bento__card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  color: var(--c-text-tertiary);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
  text-decoration: none;
  position: relative;
  z-index: 1;
}

.bento__card-icon:hover {
  color: var(--c-accent);
  background: var(--c-accent-dim);
  transform: translateY(-1px);
}

.bento__card-icon svg {
  flex-shrink: 0;
}

.bento__card-title-link {
  color: inherit;
  text-decoration: none;
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
}

.bento__card-title-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--c-accent), #18bda3);
  transition: width var(--duration-normal) var(--ease-out);
}

.bento__card-title-link:hover {
  color: var(--c-accent);
}

.bento__card-title-link:hover::after {
  width: 100%;
}

.bento__card-title {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.3vw, 1.18rem);
  font-weight: var(--fw-bold);
  color: var(--c-text-primary);
  line-height: var(--lh-heading);
  margin-top: var(--s-2);
}

.bento__card-desc {
  font-size: 0.88rem;
  font-weight: var(--fw-regular);
  line-height: 1.58;
  color: var(--c-text-secondary);
  margin-top: var(--s-2);
  max-width: 54ch;
}

.bento__card-footer {
  margin-top: auto;
  padding-top: var(--s-5);
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
}

.bento__card-top-right .label--number {
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  border: 1px solid rgba(18, 101, 234, 0.24);
  border-radius: 999px;
  background: rgba(18, 101, 234, 0.09);
  padding: 0.17rem 0.46rem;
}

/* ============================================
   TAGS
   ============================================ */
.tag {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: var(--fw-medium);
  letter-spacing: 0.095em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: rgba(18, 101, 234, 0.08);
  border: 1px solid rgba(18, 101, 234, 0.18);
  border-radius: 999px;
  padding: 0.26rem 0.54rem;
  white-space: nowrap;
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.tag:hover {
  border-color: rgba(18, 101, 234, 0.42);
  color: #0e59cf;
  background: rgba(18, 101, 234, 0.14);
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.timeline__item {
  display: grid;
  grid-template-columns: 235px 1fr;
  gap: var(--s-6);
  padding: clamp(1rem, 1.6vw, 1.4rem);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  transition: border-color var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.timeline__item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    520px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(24, 189, 163, 0.1),
    transparent 48%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.timeline__item:hover::before {
  opacity: 1;
}

.timeline__item:hover {
  border-color: var(--c-border-strong);
  background: var(--c-bg-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.timeline__left {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding-right: var(--s-5);
  border-right: 1px solid var(--c-border);
}

.timeline__company {
  font-family: var(--font-body);
  font-size: 1.07rem;
  font-weight: var(--fw-bold);
  color: var(--c-text-primary);
}

.timeline__role {
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  color: var(--c-text-primary);
  line-height: var(--lh-body);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--s-2);
  display: inline-flex;
  align-self: flex-start;
  border: 1px solid rgba(18, 101, 234, 0.2);
  border-radius: 999px;
  background: rgba(18, 101, 234, 0.09);
  padding: 0.2rem 0.52rem;
}

.timeline__right {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding-left: var(--s-2);
}

.timeline__bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.timeline__bullet {
  font-size: 0.88rem;
  color: var(--c-text-secondary);
  line-height: 1.58;
  padding-left: 0.95rem;
  position: relative;
}

.timeline__bullet::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--c-accent), #18bda3);
}

.timeline__tags {
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
  margin-top: var(--s-1);
}

/* ============================================
   SKILLS
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--grid-gap);
}

.skill-item {
  background: #f9fcff;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 0.56rem 0.8rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.skill-item:hover {
  border-color: var(--c-accent-soft);
  color: var(--c-accent);
  transform: translateY(-2px);
  background: #ffffff;
}

/* ============================================
   EDUCATION
   ============================================ */
.edu-grid {
  display: grid;
  gap: var(--grid-gap);
}

.edu-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--s-5);
  padding: clamp(1rem, 2vw, 1.55rem);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.edu-card:hover {
  border-color: var(--c-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.edu-card__school {
  font-family: var(--font-body);
  font-size: 1.08rem;
  font-weight: var(--fw-bold);
  color: var(--c-text-primary);
}

.edu-card__degree {
  font-size: 0.9rem;
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  margin-top: var(--s-2);
}

.edu-card__details {
  font-size: 0.87rem;
  color: var(--c-text-tertiary);
  margin-top: var(--s-3);
  line-height: 1.58;
  max-width: 74ch;
}

.edu-card__gpa {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: var(--fw-semibold);
  color: var(--c-accent);
  align-self: center;
  text-align: right;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border: 1px solid rgba(18, 101, 234, 0.24);
  border-radius: 999px;
  background: rgba(18, 101, 234, 0.09);
  padding: 0.25rem 0.62rem;
}

.edu-card__gpa-label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-tertiary);
  letter-spacing: var(--ls-wide);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--s-12) var(--grid-padding) var(--s-8);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  left: var(--grid-padding);
  right: var(--grid-padding);
  top: 0;
  border-top: 1px solid rgba(201, 214, 228, 0.88);
}

.footer > * {
  width: min(var(--max-width), 100%);
  margin-inline: auto;
}

.footer .reveal:first-child {
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  background:
    radial-gradient(580px circle at 5% 10%, rgba(18, 101, 234, 0.1), transparent 58%),
    radial-gradient(500px circle at 96% 88%, rgba(24, 189, 163, 0.1), transparent 58%),
    #ffffff;
  box-shadow: var(--shadow-sm);
  padding: clamp(1.1rem, 3vw, 2.4rem);
}

.footer__title {
  font-family: var(--font-body);
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading);
  letter-spacing: -0.02em;
  color: var(--c-text-primary);
}

.footer__title em {
  font-style: italic;
  color: var(--c-accent);
}

.footer__subtitle {
  font-size: 0.97rem;
  color: var(--c-text-secondary);
  margin-top: var(--s-4);
  max-width: 52ch;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: var(--s-4);
  margin-top: var(--s-8);
  flex-wrap: wrap;
}

.footer__link {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-text-secondary);
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--c-border-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  border-color: var(--c-accent-soft);
  color: var(--c-accent);
  background: #ffffff;
  transform: translateY(-1px);
}

.footer__bottom {
  margin-top: var(--s-10);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-text-tertiary);
  letter-spacing: var(--ls-wide);
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

.reveal--delay-1 { transition-delay: 90ms; }
.reveal--delay-2 { transition-delay: 180ms; }
.reveal--delay-3 { transition-delay: 270ms; }
.reveal--delay-4 { transition-delay: 360ms; }
.reveal--delay-5 { transition-delay: 450ms; }
.reveal--delay-6 { transition-delay: 540ms; }

.stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.stagger--visible > *:nth-child(1) { transition-delay: 60ms; }
.stagger--visible > *:nth-child(2) { transition-delay: 120ms; }
.stagger--visible > *:nth-child(3) { transition-delay: 180ms; }
.stagger--visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger--visible > *:nth-child(5) { transition-delay: 300ms; }
.stagger--visible > *:nth-child(6) { transition-delay: 360ms; }
.stagger--visible > *:nth-child(7) { transition-delay: 420ms; }
.stagger--visible > *:nth-child(8) { transition-delay: 480ms; }
.stagger--visible > *:nth-child(9) { transition-delay: 540ms; }
.stagger--visible > *:nth-child(10) { transition-delay: 600ms; }
.stagger--visible > *:nth-child(n + 11) { transition-delay: 650ms; }

.stagger--visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   CURSOR GLOW
   ============================================ */
.cursor-glow {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18, 101, 234, 0.08) 0%, transparent 68%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* ============================================
   DOT GRID
   ============================================ */
.dot-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(var(--c-dot) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.28) 28%, rgba(0, 0, 0, 0.26) 72%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.28) 28%, rgba(0, 0, 0, 0.26) 72%, transparent 100%);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1100px) {
  .hero__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline__item {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }

  .timeline__left {
    padding-right: 0;
    border-right: 0;
  }

  .timeline__right {
    padding-left: 0;
  }

  .bento__card--wide,
  .bento__card--narrow,
  .bento__card--two-third {
    grid-column: span 6;
  }
}

@media (max-width: 820px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--s-5);
  }

  .about-photo {
    max-width: 280px;
    margin: 0 auto;
  }

  .hero__scroll-hint {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --grid-gap: 0.8rem;
  }

  .nav {
    left: var(--grid-padding);
    right: var(--grid-padding);
    width: auto;
    transform: none;
    justify-content: space-between;
    border-radius: var(--r-md);
  }

  .nav--hidden {
    transform: translateY(-145%);
  }

  .nav__links {
    display: none;
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
    border-radius: var(--r-md);
    padding: 0.95rem 1rem;
    gap: 0.8rem;
  }

  .nav__links--open {
    display: flex;
  }

  .nav__toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding-top: 7.4rem;
    padding-bottom: var(--s-8);
  }

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

  .hero__cta {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .hero__btn {
    width: 100%;
  }

  .section {
    padding-top: var(--s-10);
    padding-bottom: var(--s-10);
  }

  .section__header {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: var(--s-8);
  }

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

  .bento__card--wide,
  .bento__card--narrow,
  .bento__card--half,
  .bento__card--third,
  .bento__card--full,
  .bento__card--two-third {
    grid-column: span 1;
  }

  .edu-card {
    grid-template-columns: 1fr;
  }

  .edu-card__gpa,
  .edu-card__gpa-label {
    text-align: left;
  }

  .footer__links {
    justify-content: flex-start;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-3);
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
  }
}

@media (max-width: 560px) {
  :root {
    --grid-padding: 0.95rem;
  }

  .bento__card-top {
    gap: var(--s-2);
    flex-direction: column;
  }

  .bento__card-top-right {
    width: 100%;
    justify-content: space-between;
  }

  .footer__links {
    flex-direction: column;
    align-items: stretch;
  }

  .footer__link {
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0s !important;
  }

  .cursor-glow {
    display: none;
  }
}