/* Rifat Iqbal — Spatial portfolio. Buildless, responsive, dependency-free. */
:root {
  color-scheme: dark;
  --bg: #0b0d0c; --bg2: #111412; --bg3: #181c18; --card: #191d19;
  --text: #f1f0e9; --muted: #b1b5aa; --white: #fff;
  --accent: #e7bd76; --accent2: #c18a3a; --border: #ffffff16;
  --phase1: #89baf1; --phase2: #b0a1ed; --phase3: #e7aa98; --phase4: #9ac798;
  --phase5: #e7bd76; --phase6: #d39dcf; --phase7: #8ac9bd; --phase8: #e4a4bb;
  --phase9: #bacc8f; --phase10: #e7bd76;
  --sans: 'DM Sans', system-ui, sans-serif; --display: 'Syne', system-ui, sans-serif;
  --serif: 'Instrument Serif', Georgia, serif; --ease: cubic-bezier(.2,.7,.2,1);
  --gutter: clamp(22px, 5.3vw, 88px); --max-width: 1440px;
}
* {box-sizing: border-box; margin: 0; padding: 0;}
html {scroll-behavior: smooth; scroll-padding-top: 110px;}
body {background: var(--bg); color: var(--text); font: 400 16px/1.75 var(--sans); overflow-x: clip;}
::selection {background: var(--accent); color: var(--bg);}
a {color: inherit; text-decoration: none;}
button {font: inherit; color: inherit; cursor: pointer;}
button, a {-webkit-tap-highlight-color: transparent;}
button {touch-action: manipulation;}
img {max-width: 100%; display: block;}
[hidden] {display: none !important;}
a:focus-visible, button:focus-visible {outline: 2px solid var(--accent); outline-offset: 6px;}
.skip-link {position: fixed; top: -90px; left: 20px; padding: 12px 24px; background: var(--accent); color: var(--bg); z-index: 1000;}
.skip-link:focus {top: 16px;}
.scroll-progress {position: fixed; left: 0; top: 0; width: 100%; height: 2px; z-index: 200; transform: scaleX(var(--progress, 0)); transform-origin: left; background: var(--accent);}
nav {position: fixed; inset: 18px var(--gutter) auto; z-index: 100; display: flex; align-items: center; gap: 24px; padding: 14px 22px; border: 1px solid #ffffff14; border-radius: 16px; background: #111512e8; backdrop-filter: blur(20px); box-shadow: 0 8px 40px #0003; transition: background .3s, box-shadow .3s; max-width: 1340px; margin: auto;}
nav.scrolled {background: #101410f5; box-shadow: 0 12px 40px #0006;}
.nav-logo {font: 800 25px/1 var(--display); color: var(--accent); letter-spacing: -.08em; flex-shrink: 0; padding: 8px 5px;}
.nav-links {list-style: none; display: flex; align-items: center; justify-content: center; flex: 1; gap: clamp(12px, 1.6vw, 26px);}
.nav-links a {font-size: 12px; color: var(--muted); font-weight: 500; position: relative; padding: 8px 0;}
.nav-links a:hover, .nav-links a.active {color: var(--accent);}
.nav-links a::after {content: ''; position: absolute; height: 2px; background: var(--accent); bottom: 0; left: 0; right: 0; transform: scaleX(0); transition: transform .3s var(--ease); transform-origin: left;}
.nav-links a.active::after {transform: scaleX(1);}
.motion-toggle {background: none; border: 1px solid var(--border); border-radius: 30px; padding: 8px 11px; display: flex; gap: 7px; align-items: center; font-size: 11px; color: var(--muted);}
.motion-toggle:hover {border-color: var(--accent); color: var(--accent);}
.motion-toggle svg {width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2;}
.motion-toggle[aria-pressed=true] svg {fill: currentColor; stroke-width: 0;}
.hamburger {display: none; border: 0; background: none; padding: 12px; width: 44px; height: 44px;}
.hamburger span {display: block; width: 21px; height: 1px; margin: 5px 0; background: var(--text); transition: transform .3s, opacity .3s;}
.hamburger[aria-expanded=true] span:first-child {transform: translateY(6px) rotate(45deg);}
.hamburger[aria-expanded=true] span:nth-child(2) {opacity: 0;}
.hamburger[aria-expanded=true] span:last-child {transform: translateY(-6px) rotate(-45deg);}
.mobile-menu {display: none;}
main {overflow: clip;}
section {position: relative; padding: 100px var(--gutter); max-width: var(--max-width); margin: auto; border-bottom: 1px solid var(--border);}
section:not(#hero)::before {content: ''; position: absolute; top: -1px; left: var(--gutter); width: 80px; height: 1px; background: var(--accent); opacity: .6;}
.section-label {display: flex; align-items: center; gap: 12px; font: 500 11px/1.5 var(--sans); text-transform: uppercase; letter-spacing: .2em; color: var(--accent); margin-bottom: 16px;}
.section-label::before {content: ''; width: 22px; height: 1px; background: currentColor;}
.section-title {font: 500 clamp(38px, 4.5vw, 66px)/1.06 var(--display); letter-spacing: -.05em;}
.section-title em {font: italic 1.13em/1 var(--serif); letter-spacing: -.03em; color: var(--accent);}
.section-divider {width: 100%; height: 1px; background: linear-gradient(90deg, #ffffff14, transparent); margin: 32px 0 40px;}
/* HERO — physical layers, illuminated edge, real WebGL sculpture */
#hero {min-height: min(940px, 100svh); padding-top: 170px; padding-bottom: 100px; display: grid; grid-template-columns: 1.06fr 1fr; align-items: center; gap: 20px; isolation: isolate;}
#hero::before {content: ''; position: absolute; inset: 0; z-index: -2; background: radial-gradient(ellipse at 83% 42%, #5c512222, transparent 54%);}
#hero::after {content: ''; position: absolute; bottom: 35px; left: var(--gutter); right: var(--gutter); height: 15px; background: repeating-linear-gradient(90deg, #e7bd7640 0 1px, transparent 1px 40px); border-top: 1px solid var(--border);}
.hero-text {position: relative; z-index: 3;}
.hero-badge {display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border: 1px solid #e7bd7630; border-radius: 30px; color: var(--accent); background: #e7bd7608; text-transform: uppercase; font-size: 10px; letter-spacing: .09em; margin-bottom: 22px;}
.hero-semester {font-size: 12px; color: var(--muted); margin-bottom: 22px;}
.hero-semester strong {font-weight: 500; color: var(--accent);}
.hero-name {font: 600 clamp(78px, 8.8vw, 136px)/.84 var(--display); letter-spacing: -.065em; margin-bottom: 32px;}
.hero-name span {display: inline-block; font: italic 1.12em/.95 var(--serif); font-weight: 400; padding-left: 7px; color: var(--accent); text-shadow: 0 3px 0 #705124, 0 12px 30px #0006;}
.hero-tagline {max-width: 450px; font-size: 15px; line-height: 1.85; color: var(--muted);}
.hero-cta {display: flex; flex-wrap: wrap; gap: 10px; margin-top: 29px;}
.btn {display: inline-flex; align-items: center; justify-content: center; padding: 13px 20px; border: 1px solid var(--border); border-radius: 8px; font-size: 12px; font-weight: 500; transition: transform .3s var(--ease), box-shadow .3s, border-color .3s; min-height: 48px;}
.btn-primary {background: var(--accent); color: #18180e; box-shadow: 0 3px 0 #9a7136, 0 10px 30px #e7bd7612; border-color: var(--accent);}
.btn-primary::after {content: '↗'; font-size: 18px; margin-left: 16px;}
.btn-ghost {background: #ffffff03; color: var(--text);}
.btn:hover {transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 8px 25px #0005;}
.btn:active {transform: translateY(1px);}
.hero-socials {display: flex; gap: 10px; margin-top: 28px;}
.social-icon {width: 40px; height: 40px; border: 1px solid var(--border); border-radius: 50%; display: grid; place-items: center; color: var(--muted); transition: color .25s, transform .25s, background .25s;}
.social-icon:hover {color: var(--bg); background: var(--accent); transform: translateY(-3px);}
.hero-photo-wrap {position: relative; min-width: 0; height: 600px; display: grid; place-items: center; perspective: 1200px;}
.hero-scene {position: absolute; inset: -10% -15%; width: 130%; height: 120%; pointer-events: none; z-index: 0;}
.scene-backdrop {position: absolute; inset: 0; perspective: 800px; opacity: .65;}
.orbit {position: absolute; inset: 16% -6%; border: 1px solid #e7bd7650; border-radius: 50%; transform: rotate(-28deg) rotateX(58deg); box-shadow: 0 0 20px #e7bd7605;}
.orbit-b {inset: 8% 4%; transform: rotate(30deg) rotateY(55deg); border-width: 2px;}
.orbit-c {inset: 20% -12%; transform: rotate(-15deg) rotateX(68deg); border-color: #e7bd7620;}
.scene-ready .scene-backdrop {opacity: .22;}
.scene-floor {position: absolute; bottom: 0; width: 110%; height: 50%; background-image: linear-gradient(#e7bd7616 1px, transparent 1px), linear-gradient(90deg, #e7bd7616 1px, transparent 1px); background-size: 38px 38px; transform: rotateX(73deg); mask-image: radial-gradient(ellipse, #000 10%, transparent 65%);}
.portrait-stage {position: relative; width: min(72%, 350px); aspect-ratio: 380/480; transform-style: preserve-3d; transform: rotateX(calc(-2deg + var(--rx, 0deg))) rotateY(calc(-12deg + var(--ry, 0deg))) rotateZ(4deg); z-index: 2; transition: transform .65s var(--ease);}
.hero-photo-frame {position: absolute; inset: 0; border: 1px solid #e7bd7680; border-radius: 16px; background: var(--bg2); transform: translateZ(24px); box-shadow: 24px 28px 60px #0009, -1px 0 0 #e7bd7680;}
.hero-photo-frame img {width: 100%; height: 100%; object-fit: cover; border-radius: 15px;}
.hero-photo-frame::after {content: ''; position: absolute; inset: 0; background: linear-gradient(150deg, #fff1, transparent 45%, #0002); border-radius: inherit; pointer-events: none;}
.portrait-rim {position: absolute; inset: -14px; border: 1px solid #e7bd7655; border-radius: 22px; background: linear-gradient(135deg,#e7bd7610,#ffffff02); transform: translateZ(-12px); box-shadow: inset 0 0 0 6px #ffffff02;}
.portrait-rim::before {content: ''; position: absolute; inset: -12px; border: 1px solid #e7bd7618; border-radius: 27px; transform: translateZ(-20px);}
.photo-accent-dot {position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); top: 15px; right: 15px; box-shadow: 0 0 14px #e7bd7680; transform: translateZ(10px);}
.portrait-coordinate {position: absolute; bottom: -42px; right: -28px; font: 10px/1.4 monospace; letter-spacing: .24em; color: var(--accent); transform: translateZ(55px);}
.floating-glyph {position: absolute; z-index: 3; display: grid; place-items: center; width: 76px; height: 76px; border: 1px solid #e7bd7640; border-radius: 16px; background: linear-gradient(140deg,#343a2df0,#131810f0); box-shadow: 8px 10px 0 #050705, 9px 11px 0 #e7bd7620, 16px 22px 34px #0005; color: var(--accent); font: 24px/1 monospace; animation: drift 7s ease-in-out infinite;}
.glyph-a {top: 11%; left: 3%; --rz: -12deg; transform: rotate(-12deg);}
.glyph-b {bottom: 14%; right: 0; width: 68px; height: 68px; --rz: 12deg; animation-delay: -3s;}
@keyframes drift {0%,100% {transform: translateY(0) rotate(var(--rz));} 50% {transform: translateY(-15px) rotate(var(--rz));}}
/* WORK — original content, sculptural covers, optional real thumbnails */
.gallery-filters {display: flex; flex-wrap: wrap; gap: 8px; margin: -5px 0 30px;}
.gallery-filter {padding: 9px 18px; border: 1px solid var(--border); border-radius: 30px; color: var(--muted); background: transparent; font-size: 12px; min-height: 40px; transition: background .2s, color .2s;}
.gallery-filter:hover {color: var(--text); border-color: #e7bd7650;}
.gallery-filter[aria-pressed=true] {background: var(--accent); color: var(--bg); border-color: var(--accent);}
.projects-grid {display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px;}
.project-card, .certificate-card {position: relative; min-width: 0; background: linear-gradient(145deg,#1a201b,#111610); border: 1px solid #ffffff1c; border-radius: 18px; padding: 24px; display: flex; flex-direction: column; transform-style: preserve-3d; box-shadow: 0 5px 0 #060a06, 0 6px 0 #ffffff0b, 0 20px 40px #0003; transition: transform .5s var(--ease), border-color .4s, box-shadow .4s;}
.project-card:hover, .certificate-card:hover {border-color: #e7bd7650; box-shadow: 0 5px 0 #060a06, 0 6px 0 #e7bd7630, 0 25px 45px #0006;}
.project-name {font: 600 20px/1.35 var(--display); letter-spacing: -.035em; margin-bottom: 12px;}
.project-desc {color: var(--muted); font-size: 14px; line-height: 1.85;}
.project-tech {display: flex; flex-wrap: wrap; gap: 7px; margin: 22px 0;}
.tech-tag {padding: 4px 9px; color: #c8ccbe; font-size: 10px; border: 1px solid #ffffff12; background: #ffffff04; border-radius: 4px;}
.project-actions, .certificate-actions {display: flex; flex-wrap: wrap; gap: 12px; margin-top: auto; padding-top: 16px;}
.project-action, .certificate-action {display: inline-flex; align-items: center; gap: 15px; min-height: 44px; font-size: 12px; font-weight: 500; color: var(--accent); border-bottom: 1px solid #e7bd7640;}
.project-action::after, .certificate-action::after {content: '↗'; font-size: 17px;}
.project-action:hover, .certificate-action:hover {color: var(--white);}
.project-media {width: 100%; aspect-ratio: 16/10; object-fit: cover; margin-bottom: 24px; border-radius: 10px; border: 1px solid var(--border);}
.project-visual {position: relative; height: 220px; border-radius: 11px; margin-bottom: 26px; display: grid; place-items: center; perspective: 800px; background: radial-gradient(ellipse at 50% 50%, #5c653729, transparent 75%), linear-gradient(140deg,#0e140f,#192019); border: 1px solid var(--border); overflow: hidden;}
.project-visual::before {content: ''; position: absolute; inset: 0; background-image: linear-gradient(#ffffff06 1px, transparent 1px),linear-gradient(90deg,#ffffff06 1px,transparent 1px); background-size: 30px 30px; mask-image: linear-gradient(transparent,#000);}
.visual-index {position: absolute; top: 18px; left: 18px; color: #a7af9a; font: 10px/1 monospace; letter-spacing: .15em;}
.visual-category {position: absolute; bottom: 16px; right: 18px; font: 10px/1 monospace; text-transform: uppercase; color: var(--accent); letter-spacing: .15em;}
.visual-cube {position: relative; width: 86px; height: 86px; transform-style: preserve-3d; transform: rotateX(-22deg) rotateY(-32deg); transition: transform .8s var(--ease);}
.project-card:hover .visual-cube {transform: rotateX(-12deg) rotateY(-15deg) translateY(-6px);}
.cube-face {position: absolute; width: 86px; height: 86px; border: 1px solid #e7bd7680; background: linear-gradient(140deg,#77613a,#242f23); display: grid; place-items: center; font: 28px/1 var(--display); color: #f9ddb0; backface-visibility: hidden;}
.cube-front {transform: translateZ(43px); background: linear-gradient(140deg,#35432f,#182018);}
.cube-back {transform: rotateY(180deg) translateZ(43px);}
.cube-right {transform: rotateY(90deg) translateZ(43px);}
.cube-left {transform: rotateY(-90deg) translateZ(43px);}
.cube-top {transform: rotateX(90deg) translateZ(43px); background: linear-gradient(130deg,#e4c48c,#6a653c);}
.cube-bottom {transform: rotateX(-90deg) translateZ(43px);}
.project-visual[data-kind=Web] .visual-cube {width: 130px; height: 86px;}
.project-visual[data-kind=Web] .cube-face {width: 130px;}
.project-visual[data-kind=Web] .cube-left, .project-visual[data-kind=Web] .cube-right {width: 86px;}
.project-visual[data-kind=Web] .cube-right {transform: translateX(44px) rotateY(90deg) translateZ(43px);}
.project-visual[data-kind=Design] .cube-face {border-color: #bfb0ed80; background: linear-gradient(140deg,#655978,#2a2735);}
.project-visual[data-kind=Data] .cube-face {border-color: #b2d4b080; background: linear-gradient(140deg,#547d56,#1a3122);}
.project-icon {font-size: 28px; margin-bottom: 12px;}
.coming-soon {margin-top: 26px; display: grid; grid-template-columns: auto 1fr; column-gap: 20px; padding: 24px 30px; border-style: dashed; background: transparent; box-shadow: none;}
.coming-soon .project-icon {grid-row: span 2; align-self: center; margin: 0; font-size: 24px;}
.coming-soon .project-name {font-size: 16px; margin-bottom: 4px;}
.coming-soon .project-desc {font-size: 12px;}
/* SKILLS */
.skills-grid {display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px;}
.skill-category {padding: 28px; min-width: 0; border: 1px solid var(--border); border-radius: 12px; background: linear-gradient(150deg,#ffffff04,transparent); transition: transform .4s var(--ease), border-color .3s; transform-style: preserve-3d;}
.skill-category:hover {border-color: #e7bd7640;}
.skill-cat-title {font: 500 12px/1.5 var(--display); margin-bottom: 20px; color: var(--accent);}
.skill-tags {display: flex; flex-wrap: wrap; gap: 9px;}
.skill-tag {font-size: 12px; padding: 7px 11px; border: 1px solid #ffffff12; border-radius: 6px; color: #dedfd5; background: #ffffff05;}
.skill-tag.learning {color: var(--muted); border-style: dashed; background: transparent;}
/* ABOUT / ROADMAP */
.about-grid {display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: start;}
.about-bio p {font-size: 15px; color: var(--muted); margin-bottom: 22px; line-height: 1.9;}
.about-bio strong {color: var(--text); font-weight: 500;}
.stats-row {display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--border); padding-top: 26px; gap: 10px; margin-top: 35px;}
.stat-item {display: flex; flex-direction: column; gap: 9px;}
.stat-number {font: 400 clamp(28px,3vw,45px)/1 var(--serif); color: var(--accent);}
.stat-label {font-size: 9px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted);}
.roadmap-title {font: 600 17px/1.4 var(--display); margin-bottom: 23px;}
.roadmap-grid {display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; perspective: 1000px;}
.phase-card {position: relative; text-align: left; border: 1px solid var(--border); border-left: 2px solid var(--phase-color); border-radius: 8px; padding: 15px 14px; background: #161c16; transition: transform .3s var(--ease), background .3s, box-shadow .3s; box-shadow: 0 3px 0 #050805;}
.phase-card:hover {transform: translateY(-3px) rotateX(3deg); background: #20291f;}
.phase-card.active {background: #252e23; border-color: var(--phase-color); box-shadow: 0 4px 0 #070c07, 0 8px 20px #0003;}
.phase-num {display: block; font: 10px/1.4 monospace; letter-spacing: .1em; color: var(--phase-color); margin-bottom: 6px; text-transform: uppercase;}
.phase-name {font-size: 11px; line-height: 1.5; display: block;}
.phase-detail {display: none; padding: 23px; margin-top: 18px; border: 1px solid var(--border); border-radius: 10px; background: #101710;}
.phase-detail.show {display: block; animation: detail-in .35s var(--ease) both;}
.phase-detail h4 {font: 500 14px/1.5 var(--display); margin-bottom: 16px;}
.phase-topics {display: flex; flex-wrap: wrap; gap: 7px;}
.topic-tag {padding: 3px 8px; font-size: 10px; border: 1px solid var(--border); border-radius: 4px; color: var(--muted);}
@keyframes detail-in {from {opacity: 0; transform: translateY(8px);} to {opacity: 1; transform: none;}}
/* EDUCATION / EXPERIENCE */
.edu-timeline {position: relative; padding-left: 35px; border-left: 1px solid #e7bd7640; margin-left: 9px;}
.edu-item {position: relative; padding: 0 0 45px 10px; max-width: 900px;}
.edu-item:last-child {padding-bottom: 0;}
.edu-item::before {content: ''; position: absolute; left: -41px; top: 7px; width: 11px; height: 11px; background: var(--bg); border: 2px solid var(--accent); border-radius: 50%; box-shadow: 0 0 0 6px var(--bg);}
.edu-item:first-child::before {background: var(--accent); box-shadow: 0 0 0 6px var(--bg),0 0 25px #e7bd7633;}
.edu-badge {display: inline-block; font: 10px/1.5 monospace; text-transform: uppercase; letter-spacing: .15em; color: var(--accent); margin-bottom: 12px; padding: 4px 9px; border: 1px solid #e7bd7630; border-radius: 4px;}
.edu-degree {font: 600 clamp(18px,2vw,26px)/1.4 var(--display); letter-spacing: -.03em; margin-bottom: 6px;}
.edu-school {color: #c8ccbe; font-size: 14px;}
.edu-period {color: var(--accent); font-size: 12px; margin-top: 9px;}
.edu-desc {font-size: 14px; color: var(--muted); line-height: 1.85; margin-top: 16px; max-width: 800px;}
#experience > .fade-up:last-child {display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px;}
.exp-card {padding: 32px; border: 1px solid var(--border); border-top: 2px solid #e7bd7640; border-radius: 12px; background: linear-gradient(150deg,#ffffff04,transparent);}
.exp-header {display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 22px;}
.exp-role {font: 600 18px/1.45 var(--display);}
.exp-company {color: var(--accent); font-size: 12px; margin-top: 9px;}
.exp-period {font: 10px/1.6 monospace; color: var(--muted); white-space: nowrap; padding-top: 5px;}
.exp-points {list-style: none; color: var(--muted); font-size: 13px;}
.exp-points li {position: relative; padding-left: 16px; margin-top: 14px;}
.exp-points li::before {content: ''; position: absolute; top: .8em; left: 0; width: 4px; height: 4px; border-radius: 50%; background: var(--accent);}
/* CERTIFICATES — framed gallery / accessible fullscreen preview */
.certificate-image-button {position: relative; width: 100%; border: 0; background: #080d08; padding: 22px; margin-bottom: 25px; border-radius: 8px; cursor: zoom-in; box-shadow: inset 0 0 0 1px #e7bd7625;}
.certificate-image {width: 100%; height: 230px; object-fit: contain; filter: drop-shadow(8px 10px 10px #0005); transition: transform .5s var(--ease);}
.certificate-image-button:hover .certificate-image {transform: scale(1.025);}
.certificate-issuer {color: var(--accent); font-size: 13px; line-height: 1.7;}
.certificate-date, .certificate-id {font-size: 12px; color: var(--muted); margin-top: 7px;}
.certificate-preview {position: fixed; inset: 0; z-index: 500; display: grid; place-items: center; padding: 80px 30px 30px; background: #050805ed; backdrop-filter: blur(16px);}
.certificate-preview img {max-width: min(1200px,100%); max-height: calc(100dvh - 120px); width: auto; height: auto; object-fit: contain; border: 1px solid #e7bd7650; box-shadow: 0 20px 80px #0009;}
.certificate-preview-close {position: absolute; top: 20px; right: 24px; padding: 10px 20px; border: 1px solid #e7bd7650; border-radius: 7px; background: #1a2118; color: var(--accent); min-height: 44px;}
.preview-open {overflow: hidden;}
/* INTERESTS */
.interests-grid {display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 26px;}
.interest-card {padding: 26px 0; border-top: 1px solid var(--border);}
.interest-icon {display: inline-grid; place-items: center; width: 48px; height: 48px; border: 1px solid var(--border); border-radius: 10px; background: #1a2019; font-size: 23px; margin-bottom: 22px; box-shadow: 3px 4px 0 #050805, 4px 5px 0 #e7bd7620; transform: rotate(-5deg);}
.interest-title {font: 600 17px/1.45 var(--display); margin-bottom: 15px;}
.interest-desc {font-size: 13px; color: var(--muted); line-height: 1.85;}
.interest-impact {font-size: 11px; line-height: 1.9; margin-top: 18px; padding: 14px; color: #bfc5b5; border-left: 1px solid #e7bd7640; background: #ffffff03;}
/* CONTACT */
#contact {background: radial-gradient(ellipse at 50% 40%,#6e5c2320,transparent 65%); padding-bottom: 30px; text-align: center;}
.contact-inner {max-width: 900px; margin: auto;}
#contact .section-label {justify-content: center;}
#contact .section-title {font-size: clamp(50px,7vw,100px);}
#contact .section-divider {max-width: 150px;}
.contact-tagline {max-width: 650px; color: var(--muted); font-size: 14px; margin: auto; line-height: 1.85;}
.contact-links {display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 32px;}
.contact-link {display: inline-flex; align-items: center; gap: 9px; padding: 12px 17px; min-height: 48px; font-size: 12px; background: #181e17; border: 1px solid #ffffff18; border-radius: 8px; transition: transform .3s, border-color .3s;}
.contact-link:hover {transform: translateY(-4px); border-color: var(--accent); color: var(--accent);}
.link-icon {font-size: 15px;}
.footer-note {font-size: 10px; line-height: 1.8; color: var(--muted); border-top: 1px solid var(--border); padding: 24px 0 0; margin-top: 80px;}
.back-to-top {position: fixed; right: 22px; bottom: 22px; z-index: 80; width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid #e7bd7650; border-radius: 50%; color: var(--accent); background: #161d15e8; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;}
.back-to-top.shown {opacity: 1; visibility: visible;}
/* Progressive motion: copy is always visible until animation is scheduled. */
[data-tilt] {transform: perspective(1100px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));}
.portrait-stage[data-tilt] {transform: rotateX(calc(-2deg + var(--rx,0deg))) rotateY(calc(-12deg + var(--ry,0deg))) rotateZ(4deg);}
.project-card > .project-name, .project-card > .project-tech {transform: translateZ(10px);}
.motion-paused *, .page-hidden * {animation-play-state: paused !important;}
.motion-paused [data-tilt] {--rx: 0deg !important; --ry: 0deg !important;}
.motion-paused *, .motion-paused *::before, .motion-paused *::after {transition-duration: 0s !important;}
html.motion-disabled {scroll-behavior: auto;}
@media (min-width: 1500px) {nav {left: 50px; right: 50px;}}
@media (max-width: 1120px) {
  nav {gap: 12px; padding: 10px 16px;}
  .nav-links {gap: 13px;}
  .nav-links a {font-size: 10px;}
  .motion-toggle span {display: none;}
  #hero {padding-top: 145px;}
  .hero-photo-wrap {height: 520px;}
  .hero-name {font-size: clamp(80px,10vw,110px);}
  .hero-cta {gap: 8px;}
  .btn {padding: 12px 15px; font-size: 11px;}
  .about-grid {gap: 30px;}
  .skill-category {padding: 23px;}
}
@media (max-width: 900px) {
  nav {inset: 12px 20px auto; border-radius: 12px;}
  .nav-links {display: none;}
  .nav-logo {margin-right: auto;}
  .motion-toggle span {display: inline;}
  .hamburger {display: block;}
  .mobile-menu {position: fixed; z-index: 99; top: 90px; left: 20px; right: 20px; max-height: calc(100dvh - 110px); overflow-y: auto; display: grid; grid-template-columns: repeat(2,1fr); gap: 4px; padding: 16px; background: #121a12fa; border: 1px solid #e7bd7630; border-radius: 12px; box-shadow: 0 20px 40px #0007; visibility: hidden; opacity: 0; transform: translateY(-10px); transition: transform .25s, opacity .25s, visibility .25s;}
  .mobile-menu.open {visibility: visible; opacity: 1; transform: none;}
  .mobile-menu a {font-size: 14px; padding: 14px; border-radius: 6px;}
  .mobile-menu a:hover {color: var(--accent); background: #ffffff05;}
  #hero {min-height: auto; padding-top: 145px; gap: 0;}
  .hero-badge {font-size: 9px; padding: 6px 9px;}
  .hero-name {font-size: 85px;}
  .hero-tagline {font-size: 13px;}
  .hero-photo-wrap {height: 460px;}
  .floating-glyph {width: 55px; height: 55px; font-size: 19px; border-radius: 12px;}
  .glyph-b {right: -5%;}
  .skills-grid, .interests-grid {grid-template-columns: repeat(2,minmax(0,1fr));}
  .about-grid {grid-template-columns: 1fr; gap: 45px;}
  .about-bio {max-width: 680px;}
  #experience > .fade-up:last-child {grid-template-columns: 1fr;}
  .certificate-image {height: 180px;}
}
@media (max-width: 640px) {
  html {scroll-padding-top: 100px;}
  section {padding-top: 65px; padding-bottom: 65px;}
  #hero {grid-template-columns: 1fr; padding-top: 128px; padding-bottom: 65px;}
  .hero-name {font-size: clamp(78px,20vw,115px); margin-bottom: 27px;}
  .hero-badge {font-size: 9px; letter-spacing: .06em; margin-bottom: 15px;}
  .hero-semester {font-size: 11px; margin-bottom: 22px;}
  .hero-tagline {font-size: 14px; max-width: 420px;}
  .hero-cta {gap: 8px; margin-top: 24px;}
  .btn {padding: 12px 14px; font-size: 11px;}
  .hero-socials {margin-top: 21px;}
  .hero-photo-wrap {height: 440px; max-width: 390px; width: 100%; margin: 20px auto 0;}
  .portrait-stage {width: 64%;}
  .floating-glyph {width: 58px; height: 58px;}
  .glyph-a {left: 2%; top: 14%;}
  .glyph-b {right: 4%; bottom: 16%;}
  .hero-scene {inset: -5% -10%; width: 120%; height: 110%;}
  .section-label {font-size: 10px; margin-bottom: 12px;}
  .section-divider {margin: 25px 0 30px;}
  .projects-grid {grid-template-columns: 1fr; gap: 22px;}
  .project-card, .certificate-card {padding: 20px;}
  .project-visual {height: 210px; margin-bottom: 22px;}
  .project-name {font-size: 20px;}
  .project-desc {font-size: 13px;}
  .gallery-filter {font-size: 11px; padding: 9px 15px;}
  .skills-grid {gap: 12px;}
  .skill-category {padding: 20px 14px;}
  .skill-cat-title {font-size: 11px; margin-bottom: 15px;}
  .skill-tag {font-size: 10px; padding: 5px 8px;}
  .skill-tags {gap: 7px;}
  .phase-card {padding: 14px 11px;}
  .phase-name {font-size: 11px;}
  .phase-num {font-size: 9px;}
  .about-bio p {font-size: 14px;}
  .edu-timeline {padding-left: 23px;}
  .edu-item {padding-left: 0;}
  .edu-item::before {left: -29px;}
  .edu-degree {font-size: 20px;}
  .edu-desc {font-size: 13px;}
  .exp-card {padding: 25px;}
  .exp-header {flex-direction: column; gap: 7px;}
  .certificate-image {height: auto; aspect-ratio: 4/3;}
  .certificate-image-button {padding: 15px;}
  .certificate-preview {padding: 76px 12px 20px;}
  .interests-grid {grid-template-columns: 1fr; gap: 16px;}
  .interest-card {padding: 24px 0;}
  .interest-icon {float: left; margin: 0 16px 12px 0;}
  .interest-title {padding-top: 12px; margin-bottom: 24px;}
  .interest-desc {clear: both;}
  .contact-link {font-size: 11px; padding: 10px 12px;}
  .contact-link[href^='mailto:'] {width: 100%; justify-content: center;}
  .footer-note {margin-top: 55px;}
  .coming-soon {grid-template-columns: auto 1fr; padding: 22px; column-gap: 14px;}
  .coming-soon .project-desc {font-size: 12px;}
}
@media (max-width: 360px) {
  :root {--gutter: 18px;}
  nav {left: 12px; right: 12px;}
  .hero-badge {font-size: 8px;}
  .hero-name {font-size: 80px;}
  .btn {font-size: 10px; padding: 12px;}
  .hero-photo-wrap {height: 370px;}
  .skills-grid {grid-template-columns: 1fr;}
}
@media (hover: none), (pointer: coarse) {
  .project-card:hover .visual-cube {transform: rotateX(-22deg) rotateY(-32deg);}
  [data-tilt] {--rx: 0deg !important; --ry: 0deg !important;}
  .floating-glyph {animation: none;}
}
@media (prefers-reduced-motion: reduce) {
  html {scroll-behavior: auto;}
  *, *::before, *::after {animation: none !important; transition: none !important;}
  [data-tilt] {--rx: 0deg !important; --ry: 0deg !important;}
}