/* ============================================================
   MAIN.CSS — Ketann Ingaale Portfolio
   Dark cinematic aesthetic inspired by kprverse.com
   ============================================================ */

/* ---- Local Fonts (from kprverse repo) ---- */
@font-face {
  font-family: 'ABCWhyte';
  src: url('../fonts/ABCWhyte.woff2') format('woff2'),
       url('../fonts/ABCWhyte.ttf')   format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'ABCWhyteInktrap';
  src: url('../fonts/ABCWhyteInktrap.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'PPFraktionSans';
  src: url('../fonts/PPFraktionSans-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'PPFraktionSans';
  src: url('../fonts/PPFraktionSans-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'HexaframeCF';
  src: url('../fonts/HexaframeCF-Bold.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBMPlexMono';
  src: url('../fonts/IBMPlexMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBMPlexMono';
  src: url('../fonts/IBMPlexMono-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBMPlexMono';
  src: url('../fonts/IBMPlexMono-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---- Design Tokens ---- */
:root {
  /* Colors */
  --bg:           #070707;
  --bg-alt:       #0f0f0f;
  --bg-card:      #111111;
  --fg:           #ffffff;
  --fg-dim:       rgba(255,255,255,0.55);
  --fg-muted:     rgba(255,255,255,0.28);
  --accent:       #ffffff;
  --accent-warm:  #e8ddd0;
  --accent-glow:  rgba(255,255,255,0.03);
  --border:       rgba(255,255,255,0.1);
  --border-dim:   rgba(255,255,255,0.05);

  /* Typography — kprverse font stack */
  --font-ui:          'IBMPlexMono', 'Courier New', monospace;
  --font-display:     'ABCWhyte', 'Helvetica Neue', Arial, sans-serif;
  --font-inktrap:     'ABCWhyteInktrap', 'ABCWhyte', sans-serif;
  --font-accent:      'PPFraktionSans', 'Helvetica Neue', sans-serif;
  --font-decorative:  'HexaframeCF', 'ABCWhyte', sans-serif;
  --font-handwritten: 'Dancing Script', cursive;

  /* Layout */
  --nav-width:    56px;
  --frame:        14px;

  /* Timing */
  --t-fast:       0.2s;
  --t-mid:        0.4s;
  --t-slow:       0.7s;
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:  cubic-bezier(0.87, 0, 0.13, 1);

  /* Z-index layers */
  --z-base:       1;
  --z-above:      10;
  --z-frame:      100;
  --z-nav:        200;
  --z-menu:       300;
  --z-cursor:     9000;
  --z-preloader:  10000;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  cursor: none;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

body.menu-open {
  overflow: hidden;
}

/* Selection */
::selection {
  background: rgba(255,255,255,0.15);
  color: var(--fg);
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
  cursor: none;
}

/* Images */
img {
  max-width: 100%;
  display: block;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Buttons */
button {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: none;
  outline: none;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 3px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.3);
}

/* ============================================================
   PRELOADER
   ============================================================ */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: var(--z-preloader);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: opacity 1s var(--ease-out), visibility 1s;
}

#preloader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* ============================================================
   AMBIENT CANVAS — fixed page-wide background
   ============================================================ */
#ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  /* Sits below everything except the very bottom stack */
}

/* Ambient background canvas */
#preloader-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Big KI initials */
.preloader-ki {
  display: flex;
  align-items: baseline;
  gap: 0.02em;
  user-select: none;
  pointer-events: none;
  position: relative;
  z-index: 1;
}

.preloader-ki-k,
.preloader-ki-i {
  font-family: var(--font-decorative);
  font-size: clamp(8rem, 22vw, 20rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: var(--fg);
  display: block;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out), filter 0.6s;
}

.preloader-ki-k { transition-delay: 0.05s; }
.preloader-ki-i { transition-delay: 0.2s; }

.preloader-ki.visible .preloader-ki-k,
.preloader-ki.visible .preloader-ki-i {
  opacity: 1;
  transform: translateY(0);
}

/* Exit: scale up + blur */
#preloader.hiding .preloader-ki-k,
#preloader.hiding .preloader-ki-i {
  opacity: 0;
  transform: scale(1.25) translateY(-10px);
  filter: blur(8px);
}

/* Loading bar + meta — fixed to bottom of preloader */
.preloader-bottom {
  position: absolute;
  bottom: 10vh;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  width: min(420px, 80vw);
  display: flex;
  flex-direction: column;
  gap: 14px;
  opacity: 0;
  transition: opacity 0.5s var(--ease-out) 0.4s;
}

.preloader-bottom.visible {
  opacity: 1;
}

.preloader-bar-track {
  width: 100%;
  height: 1px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}

.preloader-bar-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--fg);
  transition: width 0.25s linear;
}

.preloader-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.preloader-percent {
  font-size: 0.65rem;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-ui);
}

.preloader-file {
  font-size: 0.6rem;
  color: var(--fg-muted);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  max-width: 65%;
}

/* ============================================================
   FRAME OVERLAY
   ============================================================ */
.frame-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-frame);
}

.frame-line {
  position: absolute;
  background: var(--border);
}

.frame-line--top    { top: var(--frame); left: 0; right: 0; height: 1px; }
.frame-line--bottom { bottom: var(--frame); left: 0; right: 0; height: 1px; }
.frame-line--left   { left: var(--frame); top: 0; bottom: 0; width: 1px; }
.frame-line--right  { right: var(--frame); top: 0; bottom: 0; width: 1px; }

/* Corner marks */
.frame-corner {
  position: absolute;
  width: 8px;
  height: 8px;
}

.frame-corner::before,
.frame-corner::after {
  content: '';
  position: absolute;
  background: rgba(255,255,255,0.35);
}

.frame-corner--tl { top: var(--frame); left: var(--frame); }
.frame-corner--tl::before { top: 0; left: 0; width: 1px; height: 100%; }
.frame-corner--tl::after  { top: 0; left: 0; width: 100%; height: 1px; }

.frame-corner--tr { top: var(--frame); right: var(--frame); }
.frame-corner--tr::before { top: 0; right: 0; width: 1px; height: 100%; }
.frame-corner--tr::after  { top: 0; right: 0; width: 100%; height: 1px; }

.frame-corner--bl { bottom: var(--frame); left: var(--frame); }
.frame-corner--bl::before { bottom: 0; left: 0; width: 1px; height: 100%; }
.frame-corner--bl::after  { bottom: 0; left: 0; width: 100%; height: 1px; }

.frame-corner--br { bottom: var(--frame); right: var(--frame); }
.frame-corner--br::before { bottom: 0; right: 0; width: 1px; height: 100%; }
.frame-corner--br::after  { bottom: 0; right: 0; width: 100%; height: 1px; }

/* Scroll progress */
#scroll-progress {
  position: fixed;
  top: var(--frame);
  left: var(--frame);
  height: 1px;
  width: 0%;
  background: var(--fg);
  z-index: calc(var(--z-frame) + 1);
  transition: width 0.1s linear;
  transform-origin: left;
}

/* ============================================================
   SIDE NAVIGATION
   ============================================================ */
#site-nav {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--nav-width);
  z-index: var(--z-nav);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: calc(var(--frame) + 8px) 0;
  border-right: 1px solid var(--border-dim);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  color: var(--fg);
  text-transform: uppercase;
}

.nav-dots {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin: auto 0;
}

.nav-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--t-fast), transform var(--t-fast);
  position: relative;
  cursor: none;
}

.nav-dot::before {
  content: attr(data-label);
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--fg-dim);
  opacity: 0;
  transition: opacity var(--t-fast);
  pointer-events: none;
}

.nav-dot:hover::before,
.nav-dot.active::before {
  opacity: 1;
}

.nav-dot.active {
  background: var(--fg);
  transform: scale(1.5);
}

.nav-dot:hover {
  background: var(--fg-dim);
}

.nav-socials {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.nav-socials a {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  color: var(--fg-muted);
  transition: color var(--t-fast);
}

.nav-socials a:hover {
  color: var(--fg);
}

/* ============================================================
   HAMBURGER BUTTON
   ============================================================ */
#hamburger {
  position: fixed;
  top: calc(var(--frame) + 8px);
  right: calc(var(--frame) + 8px);
  z-index: calc(var(--z-menu) + 1);
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  transition: gap var(--t-fast);
}

#hamburger .bar {
  display: block;
  height: 1px;
  background: var(--fg);
  transition: all 0.4s var(--ease-out);
}

#hamburger .bar:nth-child(1) { width: 22px; }
#hamburger .bar:nth-child(2) { width: 14px; }

#hamburger.active .bar:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
  width: 18px;
}
#hamburger.active .bar:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
  width: 18px;
}

/* ============================================================
   MENU OVERLAY
   ============================================================ */
#menu-overlay {
  position: fixed;
  inset: 0;
  background: #0a0a0a;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  padding: 80px 80px 80px calc(var(--nav-width) + 60px);
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.7s var(--ease-out);
  overflow: hidden;
}

#menu-overlay.open {
  clip-path: inset(0 0 0% 0);
}

.menu-top {
  margin-bottom: auto;
}

.menu-label {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.menu-nav-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  font-family: var(--font-display);
  font-variation-settings: "wght" 700;
  font-size: clamp(3rem, 7vw, 6.4rem);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--fg-muted);
  transition: color var(--t-fast);
  padding: 8px 0;
  overflow: hidden;
  position: relative;
}

.menu-nav-num {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  font-weight: 400;
  text-transform: uppercase;
  flex-shrink: 0;
  display: block;
  transform: translateY(100%);
  transition: transform 0.6s var(--ease-out), color var(--t-fast);
}

.menu-nav-text {
  display: block;
  transform: translateY(100%);
  transition: transform 0.6s var(--ease-out);
}

.menu-nav-item:hover {
  color: var(--fg);
}

.menu-nav-item:hover .menu-nav-num {
  color: var(--fg-dim);
}

#menu-overlay.open .menu-nav-item .menu-nav-num,
#menu-overlay.open .menu-nav-item .menu-nav-text {
  transform: translateY(0);
}

.menu-nav-item:nth-child(1) .menu-nav-num,
.menu-nav-item:nth-child(1) .menu-nav-text { transition-delay: 0.05s; }
.menu-nav-item:nth-child(2) .menu-nav-num,
.menu-nav-item:nth-child(2) .menu-nav-text { transition-delay: 0.1s; }
.menu-nav-item:nth-child(3) .menu-nav-num,
.menu-nav-item:nth-child(3) .menu-nav-text { transition-delay: 0.15s; }
.menu-nav-item:nth-child(4) .menu-nav-num,
.menu-nav-item:nth-child(4) .menu-nav-text { transition-delay: 0.2s; }
.menu-nav-item:nth-child(5) .menu-nav-num,
.menu-nav-item:nth-child(5) .menu-nav-text { transition-delay: 0.25s; }
.menu-nav-item:nth-child(6) .menu-nav-num,
.menu-nav-item:nth-child(6) .menu-nav-text { transition-delay: 0.3s; }
.menu-nav-item:nth-child(7) .menu-nav-num,
.menu-nav-item:nth-child(7) .menu-nav-text { transition-delay: 0.35s; }

.menu-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.menu-footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.menu-footer-col a {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--t-fast);
}

.menu-footer-col a:hover {
  color: var(--fg);
}

.menu-footer-label {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
  margin-bottom: 4px;
}

/* ============================================================
   MAIN CONTENT LAYOUT
   ============================================================ */
#main-content {
  margin-left: var(--nav-width);
  min-height: 100vh;
}

/* ============================================================
   CUSTOM CURSOR
   ============================================================ */
#cursor-outer {
  position: fixed;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: width 0.3s var(--ease-out),
              height 0.3s var(--ease-out),
              border-color 0.3s,
              background 0.3s,
              opacity 0.3s;
  will-change: transform;
}

#cursor-dot {
  position: fixed;
  width: 4px;
  height: 4px;
  background: var(--fg);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, opacity 0.2s;
  will-change: transform;
}

body.cursor-hover #cursor-outer {
  width: 56px;
  height: 56px;
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
}

body.cursor-hover #cursor-dot {
  opacity: 0;
}

body.cursor-click #cursor-outer {
  width: 20px;
  height: 20px;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 60px 80px;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ---- Parallax depth layers ---- */
.parallax-layer {
  position: absolute;
  inset: -10%;
  width: 120%;
  height: 120%;
  pointer-events: none;
  will-change: transform;
  z-index: 0;
}

/* Layer 1 — farthest back: subtle radial gradient orb, top-right */
.parallax-layer--1 {
  background: radial-gradient(
    ellipse 60% 50% at 70% 30%,
    rgba(80, 60, 120, 0.12) 0%,
    transparent 70%
  );
}

/* Layer 2 — mid distance: warm amber orb, bottom-left */
.parallax-layer--2 {
  background: radial-gradient(
    ellipse 50% 45% at 20% 75%,
    rgba(160, 100, 40, 0.08) 0%,
    transparent 65%
  );
}

/* Layer 3 — closest: fine grid / dot pattern */
.parallax-layer--3 {
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center;
  opacity: 0.6;
}

/* Featured project card */
.project-card--featured {
  border-color: rgba(255,255,255,0.15);
  position: relative;
}

.project-card--featured::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-eyebrow {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--fg-muted);
}

.hero-title {
  font-family: var(--font-handwritten);
  font-size: clamp(4rem, 10vw, 11rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.05;
  text-transform: none;
  margin-bottom: 36px;
}

/* Each line is its own overflow:hidden mask for the slide-up reveal */
.hero-title-line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.12em; /* extra room for handwritten script descenders */
}

/* Inner span starts off-screen and slides up */
.hero-title-line > span {
  display: block;
  transform: translateY(110%);
  animation: slideInFromBottom 0.9s var(--ease-out) both;
  will-change: transform;
}

.hero-title-line:nth-child(1) > span { animation-delay: 0.2s; }
.hero-title-line:nth-child(2) > span { animation-delay: 0.35s; }
.hero-title-line:nth-child(3) > span { animation-delay: 0.5s; }

.hero-title-dim {
  color: var(--fg-muted);
}

.hero-role {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--fg-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-role-prefix {
  color: var(--fg-muted);
}

#role-text {
  color: var(--fg);
  border-right: 1px solid var(--fg);
  animation: blink 1s step-end infinite;
  padding-right: 2px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 48px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border: 1px solid var(--border);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  position: relative;
  overflow: hidden;
}

.hero-cta::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--fg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
  z-index: -1;
}

.hero-cta:hover::after {
  transform: scaleX(1);
}

.hero-cta:hover {
  color: var(--bg);
}

.hero-scroll-hint {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background: var(--border);
  animation: float 2s ease-in-out infinite;
}

/* ============================================================
   TICKER BAND
   ============================================================ */
.ticker-wrap {
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  padding: 10px 0;
  overflow: hidden;
  background: var(--bg);
  position: relative;
  z-index: 2;
}

.ticker-track {
  display: flex;
  white-space: nowrap;
  will-change: transform;
}

.ticker-track.running {
  animation: ticker 40s linear infinite;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.ticker-item .ticker-dot {
  display: inline-block;
  width: 3px;
  height: 3px;
  background: var(--fg-muted);
  border-radius: 50%;
}

/* ============================================================
   SECTIONS — COMMON
   ============================================================ */
section {
  padding: 120px 60px;
  position: relative;
}

.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 80px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-dim);
}

.section-label {
  font-family: var(--font-accent);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--fg-muted);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5.5vw, 5rem);
  font-weight: 700;
  font-variation-settings: "wght" 700;
  letter-spacing: -0.05em;
  line-height: 0.95;
  text-transform: uppercase;
}

.section-number {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}

/* Reveal animations — standard fade-up (for cards, blocks) */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Mask reveal — text slides up from behind overflow:hidden parent */
.reveal-mask {
  overflow: hidden;
  display: block;
}

.reveal-mask [data-reveal] {
  opacity: 1;
  transform: translateY(105%);
  transition: transform 1s var(--ease-out);
}

.reveal-mask [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal-delay="4"] { transition-delay: 0.4s; }
[data-reveal-delay="5"] { transition-delay: 0.5s; }
[data-reveal-delay="6"] { transition-delay: 0.6s; }

/* ============================================================
   ABOUT
   ============================================================ */
#about {
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--fg-dim);
  margin-bottom: 20px;
}

.about-text p strong {
  color: var(--fg);
  font-weight: 500;
}

.about-highlight {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--fg);
  margin-bottom: 40px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.about-stat {
  padding: 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border-dim);
}

.about-stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.about-stat-label {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

/* ============================================================
   EXPERIENCE
   ============================================================ */
#experience {
  background: var(--bg-alt);
}

.experience-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.experience-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border-dim);
  transition: background var(--t-fast);
  position: relative;
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -60px;
  right: -60px;
  top: 0;
  bottom: 0;
  background: rgba(255,255,255,0.02);
  opacity: 0;
  transition: opacity var(--t-fast);
}

.experience-item:hover::before {
  opacity: 1;
}

.experience-item:first-child {
  border-top: 1px solid var(--border-dim);
}

.exp-date {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  padding-top: 4px;
}

.exp-body {}

.exp-company {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
}

.exp-role {
  font-size: 0.75rem;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.exp-role::before {
  content: '—';
  color: rgba(255,255,255,0.2);
}

.exp-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--fg-dim);
  max-width: 600px;
}

.exp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.exp-tag {
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
}

/* ============================================================
   PROJECTS
   ============================================================ */
#projects {
  background: var(--bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color var(--t-fast);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mx, 50%) var(--my, 50%),
    rgba(255,255,255,0.05) 0%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}

.project-card:hover {
  border-color: rgba(255,255,255,0.2);
}

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

.project-num {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  flex: 1;
}

.project-desc {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--fg-dim);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-tag {
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--t-fast);
  margin-top: auto;
}

.project-link:hover {
  color: var(--fg);
}

.project-link svg {
  width: 12px;
  height: 12px;
  transition: transform var(--t-fast);
}

.project-link:hover svg {
  transform: translate(2px, -2px);
}

/* ============================================================
   PUBLICATIONS / RECOGNITION
   ============================================================ */
#publications {
  background: var(--bg-alt);
}

.pub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2px;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color var(--t-fast), background var(--t-fast);
  position: relative;
}

.pub-card:hover {
  border-color: rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.02);
}

.pub-type {
  font-size: 0.55rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--border-dim);
  padding: 3px 8px;
  display: inline-block;
  align-self: flex-start;
}

.pub-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--fg);
  flex: 1;
}

.pub-venue {
  font-size: 0.75rem;
  color: var(--fg-dim);
  line-height: 1.5;
}

.pub-doi {
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  font-family: var(--font-ui);
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--t-fast);
  margin-top: auto;
}

.pub-link:hover {
  color: var(--fg);
}

.pub-link svg {
  width: 11px;
  height: 11px;
  transition: transform var(--t-fast);
}

.pub-link:hover svg {
  transform: translate(2px, -2px);
}

/* ============================================================
   EXPERIENCE INDEX NUMBER
   ============================================================ */
.exp-index {
  position: absolute;
  top: 36px;
  right: 0;
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  font-family: var(--font-ui);
  font-variant-numeric: tabular-nums;
  opacity: 0.5;
}

/* ============================================================
   SKILLS
   ============================================================ */
#skills {
  background: var(--bg-alt);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  padding: 28px;
}

.skill-category-title {
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-dim);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-item {
  font-size: 0.8rem;
  color: var(--fg-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--t-fast);
}

.skill-item:hover {
  color: var(--fg);
}

.skill-item::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}

/* ============================================================
   EDUCATION
   ============================================================ */
#education {
  background: var(--bg);
}

.education-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.education-item {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 40px;
  padding: 32px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  align-items: center;
  transition: border-color var(--t-fast);
}

.education-item:hover {
  border-color: rgba(255,255,255,0.15);
}

.edu-year {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.edu-body {}

.edu-degree {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.edu-school {
  font-size: 0.75rem;
  color: var(--fg-muted);
}

.edu-badge {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  white-space: nowrap;
}

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
  background: var(--bg-alt);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 140px 60px;
}

.contact-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.contact-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  max-width: 700px;
  margin: 0 auto 48px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  transition: border-color var(--t-fast), opacity var(--t-fast);
}

.contact-email:hover {
  border-color: var(--fg);
  opacity: 0.8;
}

.contact-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 60px;
}

.contact-link {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--t-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.contact-link:hover {
  color: var(--fg);
}

.contact-link::after {
  content: '↗';
  font-size: 0.7rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border-dim);
  padding: 40px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.footer-copy {
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.footer-link {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--t-fast);
}

.footer-link:hover {
  color: var(--fg);
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
#back-top {
  position: fixed;
  bottom: calc(var(--frame) + 16px);
  right: calc(var(--frame) + 16px);
  z-index: var(--z-above);
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--fg-muted);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--t-fast), transform var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  pointer-events: none;
}

#back-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

#back-top:hover {
  color: var(--fg);
  border-color: rgba(255,255,255,0.3);
}

/* ============================================================
   TOAST
   ============================================================ */
#toast-container {
  position: fixed;
  bottom: calc(var(--frame) + 16px);
  left: calc(var(--nav-width) + 20px);
  z-index: calc(var(--z-menu) + 10);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--fg);
  animation: fadeUp 0.4s var(--ease-out) both;
  max-width: 320px;
}

.toast.dismissed {
  animation: fadeDown 0.3s var(--ease-out) both;
}

/* ============================================================
   GRAIN OVERLAY
   ============================================================ */
.grain {
  position: fixed;
  inset: -200%;
  width: 400%;
  height: 400%;
  pointer-events: none;
  z-index: 5000;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  animation: grain 0.5s steps(1) infinite;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --nav-width: 48px;
  }

  #hero {
    padding: 0 40px 60px;
  }

  section {
    padding: 100px 40px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .experience-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .education-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .edu-badge {
    align-self: flex-start;
  }

  #menu-overlay {
    padding: 80px 40px 40px calc(var(--nav-width) + 30px);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-width: 0px;
    --frame: 8px;
  }

  #site-nav {
    display: none;
  }

  #main-content {
    margin-left: 0;
  }

  #hero {
    padding: 0 24px 60px;
  }

  section {
    padding: 80px 24px;
  }

  .section-header {
    flex-direction: column;
    gap: 16px;
  }

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

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

  footer {
    flex-direction: column;
    gap: 24px;
    text-align: center;
    padding: 40px 24px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  #menu-overlay {
    padding: 80px 24px 40px;
  }

  .menu-footer {
    flex-direction: column;
    gap: 24px;
  }

  .contact-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }

  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   HACKY TEXT — kprverse glitch typing animation
   ============================================================ */
[data-hacky] {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   LINK HOVER — sliding background, text inverts
   ============================================================ */
.link-hover {
  position: relative;
  display: inline-flex;
  align-items: center;
  overflow: hidden;
}

.link-hover__bg {
  position: absolute;
  inset: 0;
  background: var(--fg);
  transform: translateX(-101%);
  transition: transform 0.45s var(--ease-out);
  pointer-events: none;
  z-index: 0;
}

.link-hover__text {
  position: relative;
  z-index: 1;
  transition: color 0.45s var(--ease-out);
}

.link-hover:hover .link-hover__bg {
  transform: translateX(0%);
}

.link-hover:hover .link-hover__text {
  color: var(--bg);
}

/* ============================================================
   UTILITY
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.no-js [data-reveal] {
  opacity: 1;
  transform: none;
}

.no-js .reveal-mask [data-reveal] {
  opacity: 1;
  transform: none;
}

/* ============================================================
   GSAP ENHANCEMENTS
   ============================================================ */

/* Smooth scroll base (GSAP ScrollTo overrides per-click) */
html {
  scroll-behavior: smooth;
}

/* ---- Hero floating orbs ---- */
.hero-orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}

.hero-orb--1 {
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle at center, rgba(96,165,250,0.07) 0%, transparent 70%);
  filter: blur(50px);
  top: -25%;
  right: -15%;
  opacity: 0.7;
}

.hero-orb--2 {
  width: 42vw;
  height: 42vw;
  background: radial-gradient(circle at center, rgba(167,139,250,0.06) 0%, transparent 70%);
  filter: blur(70px);
  bottom: -15%;
  left: -10%;
  opacity: 0.6;
}

.hero-orb--3 {
  width: 28vw;
  height: 28vw;
  background: radial-gradient(circle at center, rgba(240,171,252,0.05) 0%, transparent 70%);
  filter: blur(60px);
  top: 35%;
  left: 22%;
  opacity: 0.5;
}

/* ---- Experience timeline line ---- */
.experience-list {
  position: relative;
}

.exp-timeline-line {
  position: absolute;
  left: -30px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(255,255,255,0.12) 8%,
    rgba(255,255,255,0.12) 92%,
    transparent 100%
  );
  pointer-events: none;
}

.exp-timeline-dot {
  position: absolute;
  left: -34px;
  top: 44px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.35);
  pointer-events: none;
}

/* ---- Enhanced project card ---- */
.project-card {
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.project-card:hover {
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 20px 60px rgba(0,0,0,0.4);
}

/* ---- GSAP char-split — no-JS fallback ---- */
.no-js [data-split] {
  /* ensure text remains visible without GSAP */
  opacity: 1;
}

/* ---- Cursor trail canvas ---- */
#cursor-trail {
  mix-blend-mode: screen;
}

/* ---- Pub type pill glow ---- */
.pub-type {
  display: inline-block;
  transition: background var(--t-fast), box-shadow var(--t-fast);
}

.pub-card:hover .pub-type {
  box-shadow: 0 0 12px rgba(255,255,255,0.08);
}

/* ---- Skill item refined hover ---- */
.skill-item {
  transition: color var(--t-fast), transform var(--t-fast);
}

.skill-item:hover {
  transform: translateX(4px);
}

/* ---- Contact section heading style ---- */
.contact-title > span {
  display: inline;
}