/* ============================================================
   Sujitra Pinsiri — UX/UI Portfolio
   Shared design tokens + components
   ============================================================ */

:root {
  /* Violet ramp — primary #6B26D9, brightened for dark UI */
  --violet: #7B33E6;
  --violet-deep: #6B26D9;
  --lilac: #C2A9F7;
  --violet-soft: rgba(123,51,230,.18);

  /* Ink / slate — light text on dark */
  --ink: #F2EFFA;
  --ink-2: #B3ABCE;
  --ink-3: #847BA6;
  --slate: #B3ABCE;

  /* Surfaces — deep violet-black */
  --paper: #0E0A1C;
  --paper-2: #271F44;
  --surface: #18112F;
  --band: #0A0717;

  /* Type */
  --display: "Poppins", "IBM Plex Sans Thai", "Plus Jakarta Sans", sans-serif;
  --body: "Plus Jakarta Sans", "IBM Plex Sans Thai", system-ui, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Sans Thai", monospace;

  /* Rhythm */
  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --r-sm: 14px;
  --r-md: 22px;
  --r-lg: 30px;
  --r-xl: 44px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.3), 0 4px 14px rgba(0,0,0,.3);
  --shadow-md: 0 10px 34px rgba(0,0,0,.45), 0 0 0 1px rgba(123,51,230,.14);
  --shadow-lg: 0 30px 80px -20px rgba(123,51,230,.55);
  --glow: 0 0 60px -10px rgba(123,51,230,.55);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
}
/* ambient glow blooms */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(900px 600px at 12% -4%, rgba(123,51,230,.22), transparent 60%),
    radial-gradient(760px 620px at 88% 22%, rgba(107,38,217,.14), transparent 60%),
    radial-gradient(820px 700px at 50% 96%, rgba(140,70,235,.16), transparent 62%);
}
body > * { position: relative; z-index: 1; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--lilac); color: #1A1330; }

/* ---------- Layout helpers ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(56px, 7vw, 96px); }

.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--violet);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1.5px;
  background: var(--lilac);
}
.eyebrow.center::after {
  content: "";
  width: 26px; height: 1.5px;
  background: var(--lilac);
}

.tag-pill {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lilac);
  background: var(--violet-soft);
  border: 1px solid rgba(139,115,232,.25);
  border-radius: 100px;
  padding: 7px 14px;
  display: inline-block;
  font-weight: 500;
}

/* ---------- Type scale ---------- */
.display {
  font-family: var(--display);
  font-weight: 700;
  line-height: .92;
  letter-spacing: -.03em;
  margin: 0;
}
h2.h-section {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.02;
  letter-spacing: -.025em;
  margin: 0;
}
.lede {
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--ink-2);
  line-height: 1.5;
  max-width: 58ch;
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--body);
  font-weight: 600;
  font-size: 15px;
  border: 0;
  border-radius: 100px;
  padding: 14px 26px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary { background: var(--violet); color: #fff; box-shadow: 0 8px 20px -8px rgba(91,78,150,.7); }
.btn-primary:hover { background: var(--violet-deep); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--paper-2); }
.btn-ghost:hover { border-color: var(--violet); color: var(--violet); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-onband { background: var(--lilac); color: var(--ink); }
.btn-onband:hover { background: #fff; transform: translateY(-2px); }

.link-arrow {
  font-weight: 600;
  color: var(--violet);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: gap .2s ease, color .2s ease;
}
.link-arrow svg { width: 16px; height: 16px; transition: transform .2s ease; }
.link-arrow:hover { color: var(--violet-deep); gap: 11px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(14,10,28,.72);
  backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.nav.scrolled { border-color: var(--paper-2); }
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--display); font-weight: 700; letter-spacing: -.02em; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--violet);
  color: #fff;
  display: grid; place-items: center;
  font-family: var(--display); font-weight: 700; font-size: 17px;
  box-shadow: 0 6px 16px -6px rgba(91,78,150,.8);
  overflow: hidden;
}
.brand-mark img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; display: block; }
.nav-links { display: flex; gap: 6px; background: var(--surface); padding: 5px; border-radius: 100px; box-shadow: var(--shadow-sm); }
.nav-links a {
  font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  padding: 8px 16px; border-radius: 100px; transition: background .18s, color .18s;
}
.nav-links a:hover { color: var(--ink); background: var(--paper-2); }
.nav-links a.active { background: var(--violet-soft); color: var(--lilac); }
@media (max-width: 860px) { .nav-links { display: none; } }

/* ---------- Cards / surfaces ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--paper-2);
  border-radius: var(--r-lg);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.band { background: var(--band); color: #fff; }
.band .lede, .band p { color: rgba(255,255,255,.7); }

/* ---------- Image slots ---------- */
image-slot {
  --hatch: repeating-linear-gradient(45deg, var(--paper-2) 0 10px, var(--paper) 10px 20px);
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Light theme overrides ---------- */
html[data-theme="light"] {
  --violet: #6B26D9;
  --violet-deep: #561BB0;
  --lilac: #B89CF5;
  --violet-soft: #ECE4FB;

  --ink: #1B1A24;
  --ink-2: #54515F;
  --ink-3: #918EA0;
  --slate: #4C4F63;

  --paper: #F4F3F8;
  --paper-2: #EAE8F1;
  --surface: #FFFFFF;
  --band: #1B1A24;

  --shadow-sm: 0 1px 2px rgba(27,26,36,.06), 0 4px 14px rgba(27,26,36,.05);
  --shadow-md: 0 8px 30px rgba(70,59,121,.10), 0 2px 8px rgba(27,26,36,.05);
  --shadow-lg: 0 30px 70px -20px rgba(70,59,121,.40);
  --glow: 0 18px 50px -24px rgba(70,59,121,.45);
}
html[data-theme="light"] body::before {
  background:
    radial-gradient(820px 540px at 16% -6%, rgba(182,169,239,.30), transparent 60%),
    radial-gradient(620px 520px at 92% 14%, rgba(182,169,239,.16), transparent 62%);
}
html[data-theme="light"] .nav { background: rgba(244,243,248,.78); }
html[data-theme="light"] .nav-links a.active { color: var(--violet-deep); }
html[data-theme="light"] .nav-links a:hover { background: var(--paper); }
html[data-theme="light"] .tag-pill { color: var(--violet); border-color: transparent; }
html[data-theme="light"] ::selection { color: var(--ink); }
html[data-theme="light"] .hero::before {
  background:
    radial-gradient(640px 420px at 18% 8%, rgba(182,169,239,.55), transparent 62%),
    radial-gradient(600px 460px at 92% 0%, rgba(91,78,150,.26), transparent 64%);
}
html[data-theme="light"] .step .ico { color: var(--violet); }
html[data-theme="light"] .step:hover .ico { color: #fff; }
html[data-theme="light"] .skills-dark { background: var(--band); border-color: transparent; box-shadow: none; }
html[data-theme="light"] .contact { background: var(--band); border-color: transparent; box-shadow: none; }

/* ---------- Theme toggle ---------- */
.theme-toggle {
  position: fixed; right: 22px; bottom: 22px; z-index: 80;
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--display); font-weight: 600; font-size: 13.5px; color: var(--ink);
  background: var(--surface); border: 1px solid var(--paper-2);
  border-radius: 100px; padding: 10px 16px 10px 12px; cursor: pointer;
  box-shadow: var(--shadow-md); transition: transform .18s ease, border-color .18s ease;
}
.theme-toggle:hover { transform: translateY(-2px); border-color: var(--violet); }
.theme-toggle .tt-ico { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--violet-soft); color: var(--lilac); }
.theme-toggle .tt-ico svg { width: 15px; height: 15px; }
html[data-theme="light"] .theme-toggle .tt-ico { color: var(--violet); }
.theme-toggle .tt-moon { display: none; }
.theme-toggle .tt-sun { display: block; }
html[data-theme="light"] .theme-toggle .tt-moon { display: block; }
html[data-theme="light"] .theme-toggle .tt-sun { display: none; }
@media (max-width: 600px) { .theme-toggle span.tt-label { display: none; } .theme-toggle { padding: 9px; } }

/* ---------- Playful doodles & textures ---------- */
.doodle { position: absolute; pointer-events: none; color: var(--lilac); z-index: 0; }
.doodle svg { width: 100%; height: 100%; display: block; overflow: visible; }
@keyframes doodle-float { 0%,100% { transform: translateY(0) rotate(var(--dr,0deg)); } 50% { transform: translateY(-9px) rotate(var(--dr,0deg)); } }
.doodle.float { animation: doodle-float 5.5s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) { .doodle.float { animation: none; } }

/* sticker = slight tilt + chunky friendly shadow */
.sticker { transform: rotate(-3deg); }

/* squiggle underline behind a highlighted word */
.squiggle { position: relative; display: inline-block; }
.squiggle::after {
  content: ""; position: absolute; left: -2%; right: -2%; bottom: -.12em; height: .34em; z-index: -1;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 16' preserveAspectRatio='none'%3E%3Cpath d='M2 11C20 4 38 4 56 9s40 5 62-3' fill='none' stroke='%23B6A9EF' stroke-width='5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / 100% 100%;
}

/* dot-grid texture for dark bands */
.tex-dots {
  background-image: radial-gradient(rgba(182,169,239,.16) 1.4px, transparent 1.4px);
  background-size: 26px 26px;
}