/* ============================================================
   Muhammad Aleem — AI & ML Portfolio
   Main Stylesheet (extracted verbatim from source HTML)
============================================================ */

    :root {
      --bg: #030712;
      --panel: rgba(7, 15, 30, .58);
      --panel-strong: rgba(8, 18, 35, .82);
      --line: rgba(148, 163, 184, .14);
      --cyan: #00d9ff;
      --green: #00f5a0;
      --violet: #8b5cf6;
    }

    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }

    html {
      background: var(--bg);
      scroll-padding-top: 100px;
    }

    /* Requested larger course text. */
    .course-item {
      font-size: 1.15rem !important;
      line-height: 1.7 !important;
    }

    body {
      margin: 0;
      overflow-x: hidden;
      color: #e5f2ff;
      background:
        radial-gradient(circle at 10% 10%, rgba(0, 217, 255, .075), transparent 28%),
        radial-gradient(circle at 90% 15%, rgba(139, 92, 246, .08), transparent 30%),
        radial-gradient(circle at 50% 100%, rgba(0, 245, 160, .055), transparent 35%),
        #030712;
      font-family: "Times New Roman", Times, serif;
      font-size: 16px;
      line-height: 1.6;
      font-weight: 400;
      letter-spacing: -0.01em;
      font-variant-numeric: tabular-nums;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
    }

    ::selection {
      color: #001018;
      background: var(--cyan);
    }

    body::-webkit-scrollbar {
      width: 7px;
    }

    body::-webkit-scrollbar-track {
      background: #02050c;
    }

    body::-webkit-scrollbar-thumb {
      border-radius: 99px;
      background: linear-gradient(var(--cyan), var(--violet));
    }

    .noise {
      position: fixed;
      inset: 0;
      z-index: 9999;
      pointer-events: none;
      opacity: .035;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
    }

    .grid-bg {
      position: fixed;
      inset: 0;
      z-index: -3;
      pointer-events: none;
      opacity: .24;
      background-image:
        linear-gradient(rgba(0, 217, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, .035) 1px, transparent 1px);
      background-size: 56px 56px;
      mask-image: linear-gradient(to bottom, black, transparent 88%);
    }

    .aurora {
      position: fixed;
      z-index: -2;
      width: 45vw;
      height: 45vw;
      min-width: 320px;
      min-height: 320px;
      border-radius: 50%;
      filter: blur(100px);
      opacity: .12;
      pointer-events: none;
      animation: drift 16s ease-in-out infinite alternate;
    }

    .aurora.one {
      top: -20vw;
      left: -15vw;
      background: var(--cyan);
    }

    .aurora.two {
      top: 20vh;
      right: -22vw;
      background: var(--violet);
      animation-delay: -5s;
    }

    .aurora.three {
      bottom: -25vw;
      left: 35%;
      background: var(--green);
      animation-delay: -9s;
    }

    @keyframes drift {
      from { transform: translate3d(-4%, -2%, 0) scale(1); }
      to { transform: translate3d(5%, 4%, 0) scale(1.12); }
    }

    .glass {
      background: linear-gradient(
        135deg,
        rgba(255, 255, 255, .055),
        rgba(255, 255, 255, .018)
      );
      border: 1px solid rgba(148, 163, 184, .15);
      backdrop-filter: blur(24px) saturate(140%);
      -webkit-backdrop-filter: blur(24px) saturate(140%);
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,.055),
        0 24px 80px rgba(0,0,0,.28);
    }

    /* Solid, non-glassy top navbar — flush against the very top of the page. */
    .navbar-solid {
      background: var(--bg);
      border-bottom: 1px solid rgba(148, 163, 184, .15);
      box-shadow: 0 12px 40px rgba(0,0,0,.35);
    }

    .glass-hover {
      transition:
        transform .45s cubic-bezier(.16,1,.3,1),
        border-color .45s ease,
        box-shadow .45s ease,
        background .45s ease;
    }

    .glass-hover:hover {
      transform: translateY(-7px);
      border-color: rgba(0, 217, 255, .28);
      background: linear-gradient(
        135deg,
        rgba(0, 217, 255, .065),
        rgba(139, 92, 246, .035)
      );
      box-shadow:
        inset 0 1px 0 rgba(255,255,255,.075),
        0 30px 90px rgba(0, 217, 255, .075);
    }

    .gradient-text {
      background: linear-gradient(110deg, #fff 5%, #9beeff 38%, #00f5a0 66%, #a78bfa 95%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .eyebrow {
      color: #8da9c0;
      letter-spacing: .28em;
      text-transform: uppercase;
      font-family: "Times New Roman", Times, serif;
      font-size: .68rem;
      font-weight: 600;
    }

    .section-title {
      font-size: clamp(2rem, 5vw, 3.6rem);
      line-height: 1;
      letter-spacing: -.055em;
      font-weight: 800;
    }

    /* Main section labels: larger than the old eyebrow labels, while
       keeping the actual section titles (e.g. The stack.) at their original size. */
    .section-label {
      font-size: clamp(1.45rem, 2.1vw, 2rem);
      line-height: 1.05;
      font-weight: 800;
      letter-spacing: .14em;
    }

    .nav-link {
      position: relative;
      color: #94a9bb;
      font-size: .78rem;
      font-weight: 500;
      letter-spacing: .01em;
      transition: color .3s ease, font-weight .3s ease;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      height: 1px;
      left: 0;
      right: 100%;
      bottom: -7px;
      background: linear-gradient(90deg, var(--cyan), var(--green));
      transition: right .35s cubic-bezier(.16,1,.3,1);
    }

    .nav-link:hover,
    .nav-link.active {
      color: #f5fbff;
      font-weight: 600;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      right: 0;
    }

    .avatar-ring {
      position: relative;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background:
        linear-gradient(#07101e, #07101e) padding-box,
        linear-gradient(135deg, var(--cyan), var(--green), var(--violet)) border-box;
      border: 1px solid transparent;
      box-shadow: 0 0 24px rgba(0, 217, 255, .16);
    }

    .avatar-core {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #9eeeff;
      font-family: "Times New Roman", Times, serif;
      font-size: 11px;
      background:
        radial-gradient(circle at 35% 30%, rgba(0,217,255,.4), transparent 30%),
        linear-gradient(145deg, #101e35, #050a13);
      border: 1px solid rgba(255,255,255,.08);
    }

    #neural-canvas {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      opacity: 1;
      z-index: 1;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background:
        radial-gradient(circle at 72% 48%, transparent 0, rgba(3,7,18,.02) 30%, rgba(3,7,18,.28) 64%, rgba(3,7,18,.72) 86%),
        linear-gradient(90deg, rgba(3,7,18,.98) 0%, rgba(3,7,18,.82) 27%, rgba(3,7,18,.15) 58%, rgba(3,7,18,.5) 100%);
    }

    .hero-glow {
      position: absolute;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,217,255,.1), transparent 65%);
      filter: blur(8px);
      pointer-events: none;
    }

    .pulse-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 0 rgba(0,245,160,.55);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(0,245,160,.5); }
      70% { box-shadow: 0 0 0 9px rgba(0,245,160,0); }
      100% { box-shadow: 0 0 0 0 rgba(0,245,160,0); }
    }

    .btn-primary,
    .btn-secondary {
      position: relative;
      overflow: hidden;
      letter-spacing: -0.005em;
      transition:
        transform .3s ease,
        box-shadow .3s ease,
        border-color .3s ease;
    }

    .btn-primary {
      color: #001116;
      background: linear-gradient(110deg, #00d9ff, #00f5a0);
      box-shadow: 0 12px 40px rgba(0,217,255,.14);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 55px rgba(0,217,255,.25);
    }

    .btn-secondary {
      color: #dff7ff;
      border: 1px solid rgba(0,217,255,.2);
      background: rgba(4, 15, 28, .55);
    }

    .btn-secondary:hover {
      transform: translateY(-3px);
      border-color: rgba(0,217,255,.5);
      box-shadow: 0 16px 50px rgba(0,217,255,.1);
    }

    .btn-primary::before,
    .btn-secondary::before {
      content: "";
      position: absolute;
      inset: 0;
      transform: translateX(-110%);
      background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent);
      transition: transform .6s ease;
    }

    .btn-primary:hover::before,
    .btn-secondary:hover::before {
      transform: translateX(110%);
    }

    .metric {
      position: relative;
    }

    .metric::before {
      content: "";
      position: absolute;
      left: 0;
      top: 5px;
      bottom: 5px;
      width: 1px;
      background: linear-gradient(transparent, var(--cyan), transparent);
    }

    .skill-card {
      position: relative;
      overflow: hidden;
    }

    .skill-card::before {
      content: "";
      position: absolute;
      width: 140px;
      height: 140px;
      right: -80px;
      top: -80px;
      border-radius: 50%;
      background: var(--skill-color, var(--cyan));
      filter: blur(55px);
      opacity: .12;
      transition: opacity .4s ease;
    }

    .skill-card:hover::before {
      opacity: .25;
    }

    .skill-icon {
      color: var(--skill-color, var(--cyan));
      border: 1px solid color-mix(in srgb, var(--skill-color, var(--cyan)) 22%, transparent);
      background: color-mix(in srgb, var(--skill-color, var(--cyan)) 7%, transparent);
    }

    .progress-track {
      height: 4px;
      border-radius: 99px;
      overflow: hidden;
      background: rgba(148,163,184,.09);
    }

    .progress-fill {
      width: 0;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--skill-color, var(--cyan)), #fff);
      box-shadow: 0 0 15px var(--skill-color, var(--cyan));
      transition: width 1.4s cubic-bezier(.16,1,.3,1);
    }

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

    .project-card::after {
      content: "";
      position: absolute;
      width: 220px;
      height: 220px;
      right: -130px;
      bottom: -130px;
      border-radius: 50%;
      background: var(--project-color, var(--cyan));
      filter: blur(80px);
      opacity: .09;
      transition: opacity .5s ease, transform .5s ease;
    }

    .project-card:hover::after {
      opacity: .2;
      transform: scale(1.2);
    }

    .project-visual {
      position: relative;
      min-height: 180px;
      overflow: hidden;
      border-bottom: 1px solid rgba(148,163,184,.1);
      background:
        radial-gradient(circle at 25% 45%, rgba(0,217,255,.15), transparent 24%),
        radial-gradient(circle at 75% 30%, rgba(139,92,246,.13), transparent 30%),
        linear-gradient(145deg, #071222, #030812);
    }

    .project-visual::before {
      content: "";
      position: absolute;
      inset: 0;
      opacity: .35;
      background-image:
        linear-gradient(rgba(0,217,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,217,255,.06) 1px, transparent 1px);
      background-size: 28px 28px;
      transform: perspective(500px) rotateX(58deg) scale(1.6) translateY(22%);
      transform-origin: center bottom;
    }

    .visual-orbit {
      position: absolute;
      left: 50%;
      top: 50%;
      width: 125px;
      height: 125px;
      border: 1px solid rgba(0,217,255,.3);
      border-radius: 50%;
      transform: translate(-50%, -50%) rotateX(62deg);
      box-shadow: 0 0 35px rgba(0,217,255,.08);
    }

    .visual-orbit:nth-child(2) {
      width: 90px;
      height: 90px;
      border-color: rgba(0,245,160,.25);
      transform: translate(-50%, -50%) rotateY(62deg) rotateX(40deg);
    }

    .visual-core {
      position: absolute;
      left: 50%;
      top: 50%;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      transform: translate(-50%, -50%);
      background: linear-gradient(135deg, #fff, var(--cyan));
      box-shadow: 0 0 35px var(--cyan), 0 0 70px rgba(0,217,255,.4);
      animation: corePulse 2.5s ease-in-out infinite;
    }

    @keyframes corePulse {
      50% { transform: translate(-50%, -50%) scale(1.3); }
    }

    .timeline {
      position: relative;
    }

    .timeline::before {
      content: "";
      position: absolute;
      left: 18px;
      top: 8px;
      bottom: 8px;
      width: 1px;
      background: linear-gradient(var(--cyan), var(--violet), transparent);
    }

    .timeline-dot {
      position: absolute;
      left: 10px;
      top: 24px;
      width: 17px;
      height: 17px;
      border-radius: 50%;
      background: #07101e;
      border: 2px solid var(--cyan);
      box-shadow: 0 0 18px rgba(0,217,255,.5);
    }

    .timeline-content {
      margin-left: 60px;
    }

    .cert-line {
      position: relative;
      transition: transform .3s ease, color .3s ease;
    }

    .cert-line:hover {
      transform: translateX(5px);
      color: white;
    }

    .cert-line::before {
      content: "↗";
      color: var(--green);
      margin-right: 9px;
    }

    .course-view-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 999px;
      border: 1px solid rgba(0, 245, 160, .3);
      color: var(--green);
      font-size: .75rem;
      font-weight: 600;
      letter-spacing: -0.005em;
      white-space: nowrap;
      transition: background .3s ease, border-color .3s ease, transform .3s ease;
    }

    .course-view-link:hover {
      background: rgba(0, 245, 160, .1);
      border-color: rgba(0, 245, 160, .5);
      transform: translateX(2px);
    }

    .form-input {
      width: 100%;
      border: 1px solid rgba(148,163,184,.13);
      outline: none;
      color: #e7f5ff;
      background: rgba(0,0,0,.2);
      transition: border-color .3s ease, box-shadow .3s ease, background .3s ease;
    }

    .form-input:focus {
      border-color: rgba(0,217,255,.5);
      background: rgba(0,217,255,.025);
      box-shadow: 0 0 0 4px rgba(0,217,255,.05);
    }

    .form-input::placeholder {
      color: #53697d;
    }

    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity .8s ease, transform .8s cubic-bezier(.16,1,.3,1);
    }

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

    .tilt {
      transform-style: preserve-3d;
      transition: transform .2s ease-out;
    }

    .tilt-inner {
      transform: translateZ(22px);
    }

    .cursor-glow {
      position: fixed;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      pointer-events: none;
      z-index: 0;
      background: radial-gradient(circle, rgba(0,217,255,.05), transparent 68%);
      transform: translate(-50%, -50%);
      mix-blend-mode: screen;
    }

    .code-line {
      display: flex;
      gap: 13px;
      color: #7890a5;
      font: 11px/1.8 "JetBrains Mono", monospace;
    }

    .code-line b {
      color: var(--green);
      font-weight: 400;
    }

    .code-line span {
      color: #d5eaff;
    }

    .floating-chip {
      animation: floatChip 4s ease-in-out infinite;
    }

    .floating-chip:nth-child(2) { animation-delay: -1.4s; }
    .floating-chip:nth-child(3) { animation-delay: -2.7s; }

    @keyframes floatChip {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    /* Requested high-intensity 3D card depth + theme borders */
    .interactive-card {
      --theme-color: var(--cyan);
      position: relative;
      transform-style: preserve-3d;
      will-change: transform;
      border-color: color-mix(in srgb, var(--theme-color) 42%, transparent);
      box-shadow:
        0 0 0 1px color-mix(in srgb, var(--theme-color) 20%, transparent),
        0 18px 55px color-mix(in srgb, var(--theme-color) 10%, transparent),
        inset 0 1px 0 rgba(255,255,255,.06);
      transition: transform .18s ease-out, box-shadow .3s ease, border-color .3s ease;
    }

    .interactive-card::before {
      content: "";
      position: absolute;
      inset: -1px;
      border-radius: inherit;
      pointer-events: none;
      z-index: 0;
      border: 1px solid color-mix(in srgb, var(--theme-color) 72%, transparent);
      opacity: .65;
      box-shadow: 0 0 24px color-mix(in srgb, var(--theme-color) 16%, transparent);
    }

    .interactive-card > * {
      position: relative;
      z-index: 1;
    }

    .interactive-card:hover {
      border-color: color-mix(in srgb, var(--theme-color) 78%, transparent);
      box-shadow:
        0 0 0 1px color-mix(in srgb, var(--theme-color) 45%, transparent),
        0 35px 95px color-mix(in srgb, var(--theme-color) 20%, transparent),
        0 12px 35px rgba(0,0,0,.35),
        inset 0 1px 0 rgba(255,255,255,.09);
    }

    .skill-card { --theme-color: var(--skill-color, var(--cyan)); }
    .project-card { --theme-color: var(--project-color, var(--cyan)); }
    .timeline-content { --theme-color: var(--cyan); }

    .about-photo {
      max-width: 300px;
      margin-left: 0;
    }

    .tilt-inner {
      transform: translateZ(42px);
      transform-style: preserve-3d;
    }

    @media (max-width: 767px) {
      .noise { opacity: .018; }
      .grid-bg { opacity: .12; background-size: 38px 38px; }
      .aurora { filter: blur(70px); opacity: .07; animation: none; }
      .aurora.one { top: -35vw; left: -35vw; }
      .aurora.two { top: 18vh; right: -35vw; }
      .aurora.three { bottom: -35vw; left: 30%; }

      /* Compact mobile navigation */
      body > header.fixed { padding: 8px 10px 0 !important; }
      body > header.fixed > nav { min-height: 46px; padding: 6px 8px !important; border-radius: 14px !important; }
      body > header.fixed .avatar-ring { width: 34px; height: 34px; }
      body > header.fixed .avatar-core { width: 28px; height: 28px; font-size: 9px; }
      body > header.fixed #mobileMenuButton { width: 36px; height: 36px; padding: 7px; border-radius: 10px; }
      body > header.fixed #mobileMenuButton svg { width: 18px; height: 18px; }
      body > header.fixed #mobileMenu { margin-top: 6px; padding: 7px; border-radius: 14px; box-shadow: 0 18px 45px rgba(0,0,0,.45); }
      body > header.fixed #mobileMenu a { padding: 10px 12px; font-size: .82rem; }

      /* Mobile neural network: visible, centered and lighter */
      #home { min-height: 100svh; }
      #neural-canvas { opacity: .48 !important; width: 100% !important; height: 100% !important; }
      .hero-overlay {
        background: linear-gradient(180deg, rgba(3,7,18,.78) 0%, rgba(3,7,18,.68) 42%, rgba(3,7,18,.92) 100%),
                    radial-gradient(circle at 70% 35%, rgba(0,217,255,.08), transparent 48%);
      }
      .hero-glow { width: 320px; height: 320px; left: 50% !important; top: 28% !important; opacity: .45; }

      /* No costly 3D hover work on touch screens */
      .interactive-card, .tilt { transform: none !important; will-change: auto; }
      .interactive-card:hover, .glass-hover:hover { transform: none !important; }
      .interactive-card::before { box-shadow: none; opacity: .45; }
      .project-card::after, .skill-card::before { filter: blur(35px); }

      #home > div.relative.z-10 { padding-top: 92px !important; padding-bottom: 52px !important; }
    }

    @media (max-width: 420px) {
      body > header.fixed { padding-left: 8px !important; padding-right: 8px !important; }
      body > header.fixed > nav { min-height: 44px; padding: 5px 7px !important; }
      body > header.fixed .avatar-ring { width: 32px; height: 32px; }
      body > header.fixed .avatar-core { width: 26px; height: 26px; }
      #home > div.relative.z-10 { padding-left: 18px !important; padding-right: 18px !important; }
    }

    @media (max-width: 768px) {
      .hero-overlay {
        background:
          radial-gradient(circle at 50% 45%, rgba(3,7,18,.12), rgba(3,7,18,.42) 68%, rgba(3,7,18,.62) 100%),
          linear-gradient(90deg, rgba(3,7,18,.78), rgba(3,7,18,.28));
      }

      #neural-canvas {
        opacity: .86;
        transform: translateZ(0);
      }

      #home {
        isolation: isolate;
      }

      .timeline::before {
        left: 13px;
      }

      .timeline-dot {
        left: 5px;
      }

      .timeline-content {
        margin-left: 42px;
      }

      .section-label {
        font-size: 1.2rem;
      }

      .about-photo {
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .interactive-card { transform: none !important; }
      *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
      }
    }
  
    /* MOBILE-ONLY NEURAL / NAV POLISH — desktop styles remain unchanged */
    @media (max-width: 767px) {
      #neural-canvas {
        opacity: .68;
      }
      .hero-overlay {
        background:
          linear-gradient(90deg, rgba(3,7,18,.94) 0%, rgba(3,7,18,.72) 62%, rgba(3,7,18,.46) 100%);
      }
      header.fixed {
        padding-top: .5rem;
        padding-left: .5rem;
        padding-right: .5rem;
      }
      header.fixed nav {
        padding-top: .55rem !important;
        padding-bottom: .55rem !important;
        border-radius: 1rem;
      }
      header.fixed .avatar-ring {
        width: 2rem;
        height: 2rem;
      }
      #mobileMenuButton {
        padding: .55rem !important;
        border-radius: .8rem;
      }
      #mobileMenu {
        margin-top: .4rem;
        padding: .5rem;
        border-radius: 1rem;
      }
      #mobileMenu a {
        padding-top: .62rem;
        padding-bottom: .62rem;
      }
    }


/* ---- Footer tag chip style (originally a second inline <style> block) ---- */
    .tag {
      display: inline-flex;
      align-items: center;
      border: 1px solid rgba(148,163,184,.11);
      background: rgba(255,255,255,.025);
      color: #8195a8;
      border-radius: 999px;
      padding: 5px 8px;
      font: 600 9px "JetBrains Mono", monospace;
      letter-spacing: .02em;
    }

/* ============================================================
   PROJECT GALLERY LIGHTBOX
   Fullscreen viewer for a project's image deck - opens on click,
   smooth vertical scroll-snap through images one at a time.
============================================================ */

.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(2, 3, 8, .92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility 0s linear .35s;
}

.lightbox-overlay.open {
  opacity: 1;
  visibility: visible;
  transition: opacity .35s ease, visibility 0s linear 0s;
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 510;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #e2e8f0;
  cursor: pointer;
}

.lightbox-counter {
  position: fixed;
  top: 26px;
  left: 24px;
  z-index: 510;
  font: 11px "JetBrains Mono", monospace;
  letter-spacing: .12em;
  color: #94a3b8;
  text-transform: uppercase;
}

.lightbox-title {
  position: fixed;
  bottom: 26px;
  left: 24px;
  right: 24px;
  z-index: 510;
  font-size: 13px;
  color: #cbd5e1;
  pointer-events: none;
}

.lightbox-scroller {
  height: 100%;
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.lightbox-slide {
  height: 100%;
  width: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 90px 5vw;
}

.lightbox-slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 30px 90px rgba(0,0,0,.55);
  opacity: 0;
  transform: scale(.96);
  transition: opacity .5s ease, transform .5s cubic-bezier(.16,1,.3,1);
}

.lightbox-slide.in-view img {
  opacity: 1;
  transform: scale(1);
}

.lightbox-nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 510;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #e2e8f0;
  cursor: pointer;
}
.lightbox-nav-btn.prev { left: 18px; }
.lightbox-nav-btn.next { right: 18px; }

@media (max-width: 640px) {
  .lightbox-nav-btn { display: none; }
  .lightbox-slide { padding: 80px 4vw 60px; }
}

.gallery-trigger {
  position: absolute;
  inset: 0;
  cursor: zoom-in;
  z-index: 5;
  background: none;
  border: none;
  padding: 0;
  appearance: none;
}

.gallery-open-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  appearance: none;
}

/* ============================================================
   10/10 POLISH PASS — visual refinement, accessibility & motion
============================================================ */
:root {
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-spring: cubic-bezier(.22, 1.15, .36, 1);
  --focus: rgba(0, 217, 255, .7);
}

body {
  background:
    radial-gradient(900px 520px at 8% -5%, rgba(0, 217, 255, .10), transparent 62%),
    radial-gradient(820px 560px at 96% 8%, rgba(139, 92, 246, .10), transparent 64%),
    radial-gradient(760px 520px at 52% 108%, rgba(0, 245, 160, .06), transparent 65%),
    #030712;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(3,7,18,0) 0%, rgba(3,7,18,.12) 55%, rgba(3,7,18,.72) 100%);
}

.navbar-solid {
  background: rgba(3, 7, 18, .82);
  backdrop-filter: blur(18px) saturate(145%);
  -webkit-backdrop-filter: blur(18px) saturate(145%);
  border-bottom-color: rgba(148, 163, 184, .11);
  box-shadow: 0 10px 38px rgba(0,0,0,.24);
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
}

.navbar-solid::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,217,255,.42), rgba(139,92,246,.34), transparent);
  opacity: .7;
}

.nav-link {
  transition: color .25s ease, transform .25s var(--ease-out);
}

.nav-link:hover { transform: translateY(-1px); }

.btn-primary,
.btn-secondary {
  isolation: isolate;
  overflow: hidden;
  transform: translateZ(0);
  box-shadow: 0 10px 30px rgba(0,0,0,.16);
  transition: transform .3s var(--ease-out), box-shadow .3s ease, border-color .3s ease, background .3s ease;
}

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

.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0) scale(.985);
}

.btn-primary::after,
.btn-secondary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 20%, rgba(255,255,255,.13) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform .65s var(--ease-out);
}

.btn-primary:hover::after,
.btn-secondary:hover::after { transform: translateX(120%); }

.glass {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.055),
    0 18px 65px rgba(0,0,0,.22);
}

.glass-hover {
  will-change: transform;
}

.glass-hover:hover {
  border-color: color-mix(in srgb, var(--theme-color, var(--cyan)) 34%, transparent);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    0 28px 80px rgba(0,0,0,.30),
    0 0 38px color-mix(in srgb, var(--theme-color, var(--cyan)) 9%, transparent);
}

.skill-card,
.project-card,
.timeline-content,
.interactive-card {
  position: relative;
}

.skill-card::after,
.project-card::before,
.timeline-content::after {
  content: "";
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 999px;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle, color-mix(in srgb, var(--theme-color, var(--cyan)) 18%, transparent), transparent 70%);
  transition: opacity .4s ease;
}

.skill-card::after,
.timeline-content::after { top: -28px; right: -28px; }
.project-card::before { top: -30px; right: -30px; }

.skill-card:hover::after,
.project-card:hover::before,
.timeline-content:hover::after { opacity: 1; }

.progress-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(148,163,184,.10);
  box-shadow: inset 0 1px 2px rgba(0,0,0,.25);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--theme-color, var(--cyan)), rgba(255,255,255,.9));
  box-shadow: 0 0 18px color-mix(in srgb, var(--theme-color, var(--cyan)) 28%, transparent);
  transform-origin: left;
  animation: progressReveal 1.1s var(--ease-out) both;
}

@keyframes progressReveal {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.reveal {
  opacity: 0;
  transform: translateY(22px) scale(.985);
  filter: blur(4px);
  transition: opacity .8s ease, transform .8s var(--ease-out), filter .8s ease;
}

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

.reveal:nth-child(2) { transition-delay: 60ms; }
.reveal:nth-child(3) { transition-delay: 110ms; }
.reveal:nth-child(4) { transition-delay: 160ms; }

.cursor-glow {
  width: 300px;
  height: 300px;
  margin: -150px 0 0 -150px;
  opacity: .18;
  filter: blur(5px);
  mix-blend-mode: screen;
  background: radial-gradient(circle, rgba(0,217,255,.14), rgba(139,92,246,.055) 38%, transparent 70%);
  transition: opacity .25s ease;
}

.code-line {
  transition: transform .3s var(--ease-out), color .3s ease, background .3s ease;
  border-radius: 8px;
  padding-top: 2px;
  padding-bottom: 2px;
}

.code-line:hover {
  transform: translateX(5px);
  background: rgba(255,255,255,.025);
}

.floating-chip {
  box-shadow: 0 12px 35px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.06);
}

.form-input {
  border-color: rgba(148,163,184,.14);
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease, transform .25s var(--ease-out);
}

.form-input:hover { border-color: rgba(148,163,184,.25); }

.form-input:focus {
  transform: translateY(-1px);
  border-color: rgba(0,217,255,.48);
  box-shadow: 0 0 0 3px rgba(0,217,255,.075), 0 12px 35px rgba(0,0,0,.16);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

section {
  scroll-margin-top: 92px;
}

@media (hover: hover) and (pointer: fine) {
  .interactive-card { transition: transform .18s ease, border-color .35s ease, box-shadow .35s ease; }
}

@media (max-width: 1023px) {
  .navbar-solid nav { min-height: 58px; }
  .section-title { letter-spacing: -.045em; }
}

@media (max-width: 767px) {
  body { font-size: 15px; }
  .grid-bg { opacity: .16; background-size: 42px 42px; }
  .aurora { filter: blur(75px); opacity: .08; }
  .glass { backdrop-filter: blur(18px) saturate(130%); -webkit-backdrop-filter: blur(18px) saturate(130%); }
  .section-title { font-size: clamp(2rem, 10vw, 3rem); }
  .section-label { font-size: 1.25rem; letter-spacing: .11em; }
  .reveal { transform: translateY(14px); filter: none; }
  .cursor-glow { display: none; }
  .mobile-menu-open { animation: menuIn .28s var(--ease-out) both; }
}

@keyframes menuIn {
  from { opacity: 0; transform: translateY(-8px) scale(.98); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .aurora, .floating-chip, .cursor-glow { animation: none !important; }
  .reveal { opacity: 1; transform: none; filter: none; }
}