/* ==========================================================================
   Vishnu Abarajithan — portfolio
   "Field manual" glassmorphism: GitHub-dark-dimmed (#0d1117) base with an
   amber accent, a masked grid texture, and frosted glass panels. IBM Plex Sans
   for text, IBM Plex Mono for eyebrows/labels. Dark is the default; a warm light
   "frosted" variant keeps the theme toggle working.
   ========================================================================== */

/* ---- Design tokens -------------------------------------------------------- */
:root {
  /* Light frosted variant — warm "field manual" palette, amber-bronze accent
     (darkened from #f5a623 so accent text keeps AA contrast on light glass). */
  --accent: #9c6a14;            /* reference --amber-dim, readable on light */
  --accent-hover: #7d540f;
  --accent-ink: #1a1205;
  --accent-soft: rgba(245, 166, 35, .16);
  --accent-glow: rgba(245, 166, 35, .22);
  --grad-accent: linear-gradient(135deg, #f5a623 0%, #f7b955 100%);

  --page: #edeae1;             /* warm light grey */
  --ink: #1c1a14;
  --ink-2: #46423a;
  --muted: #726d62;

  /* Glass surfaces */
  --glass-bg: rgba(255, 253, 250, .58);
  --glass-bg-2: rgba(255, 253, 250, .42);
  --glass-strong: rgba(255, 253, 250, .74);
  --glass-border: rgba(255, 255, 255, .7);
  --glass-border-2: rgba(140, 122, 90, .22);
  --glass-blur: blur(18px) saturate(160%);
  --glass-shadow: 0 8px 32px rgba(80, 65, 30, .12);
  --glass-shadow-lg: 0 24px 60px -18px rgba(80, 65, 30, .26);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, .85);

  /* Mapped to legacy names used throughout the markup */
  --surface: var(--glass-bg);
  --surface-2: var(--glass-bg-2);
  --surface-3: var(--glass-strong);
  --border: var(--glass-border-2);
  --shadow: var(--glass-shadow);
  --shadow-lg: var(--glass-shadow-lg);
  --shadow-panel: var(--glass-shadow-lg);

  --radius: 14px;              /* reference uses 12–14px radii */
  --radius-panel: 28px;
  --maxw: 1080px;
  --gap: clamp(1rem, 2vw, 1.5rem);
  /* IBM Plex Sans (text + headings) + IBM Plex Mono (labels/eyebrows). */
  --font: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
  --font-head: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", ui-monospace, "Cascadia Code",
               Menlo, Consolas, monospace;
  /* Shared spring-ish easing for entrances/transitions. */
  --ease: cubic-bezier(.16, 1, .3, 1);
}

html.dark {
  /* Dark glass — "field manual" palette: GitHub-dark-dimmed base + amber accent. */
  --accent: #f5a623;           /* amber — high contrast on #0d1117 */
  --accent-hover: #ffc04d;
  --accent-ink: #0d1117;
  --accent-soft: rgba(245, 166, 35, .14);
  --accent-glow: rgba(245, 166, 35, .40);
  --grad-accent: linear-gradient(135deg, #f5a623 0%, #f7b24d 100%);

  --page: #0d1117;             /* reference --bg */
  --ink: #e6edf3;              /* reference --ink */
  --ink-2: #aab6c2;            /* between --ink-dim and --ink for body legibility */
  --muted: #6b7682;            /* reference --ink-faint */

  /* Frosted glass, tinted with the cool slate of the reference's lines. */
  --glass-bg: rgba(180, 198, 220, .045);
  --glass-bg-2: rgba(180, 198, 220, .03);
  --glass-strong: rgba(180, 198, 220, .09);
  --glass-border: rgba(180, 198, 220, .16);   /* ~ --line-bright #37424f */
  --glass-border-2: rgba(160, 180, 205, .11); /* ~ --line #27313d */
  --glass-blur: blur(20px) saturate(135%);
  --glass-shadow: 0 10px 40px rgba(0, 0, 0, .45);
  --glass-shadow-lg: 0 28px 70px -16px rgba(0, 0, 0, .65);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, .07);

  --border: var(--glass-border-2);
}

/* ---- Base ----------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; background: var(--page); }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink-2);
  /* Warm light base with a soft amber glow, top-right (matches the reference). */
  background: radial-gradient(1100px 460px at 82% -8%, var(--accent-glow), transparent 60%),
              linear-gradient(180deg, #f3f0e8 0%, var(--page) 60%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .3s ease, color .3s ease;
  position: relative;
}
/* Reference background: navy-charcoal gradient + amber glow top-right. */
html.dark body {
  background: radial-gradient(1100px 460px at 82% -8%, var(--accent-glow), transparent 60%),
              linear-gradient(180deg, #0d1117 0%, #10161e 100%);
}

/* Amber glow field — fixed, blurred, the glass refracts it. Subtle drift. */
body::before {
  content: "";
  position: fixed;
  inset: -20vh -10vw;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(40vw 38vw at 84% 4%,  var(--accent-glow), transparent 60%),
    radial-gradient(34vw 32vw at 6% 92%,  var(--accent-soft), transparent 62%);
  filter: blur(50px);
  opacity: .9;
  animation: glow-drift 30s ease-in-out infinite alternate;
}
/* Signature grid texture (dark only), masked so it fades like the reference hero. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  background-image:
    linear-gradient(rgba(180, 198, 220, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 198, 220, .055) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(1200px 720px at 80% -4%, #000, transparent 72%);
          mask-image: radial-gradient(1200px 720px at 80% -4%, #000, transparent 72%);
}
html.dark body::after { opacity: 1; }

@keyframes glow-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-1.5%, 1.5%, 0) scale(1.06); }
}

/* IBM Plex Sans display: bold weights, tight tracking. */
h1, h2, h3, h4 { font-family: var(--font-head); color: var(--ink); line-height: 1.1; font-weight: 700; margin: 0 0 .5em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.3rem, 5.5vw, 3.6rem); font-weight: 700; letter-spacing: -.028em; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.3rem); font-weight: 700; letter-spacing: -.02em; }
h3 { font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--accent-soft); color: var(--ink); }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---- Layout helpers ------------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1.2rem, 4vw, 2.4rem); }
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
/* Offset in-page anchor targets so they clear the sticky header. */
[id] { scroll-margin-top: 88px; }
#top { padding-top: clamp(1.5rem, 4vw, 3rem); }
.section--tight { padding-block: clamp(2rem, 4vw, 3rem); }
.eyebrow { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .16em; font-size: .72rem; font-weight: 600; color: var(--accent); margin: 0 0 .9rem; }
.lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--ink-2); max-width: 60ch; }

/* The content "stage" — a large frosted panel that floats over the backdrop. */
main {
  display: block;
  position: relative;
  background: var(--glass-bg-2);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-panel);
  margin: clamp(.5rem, 1.5vw, 1rem) clamp(.6rem, 2.5vw, 1.5rem) clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--glass-shadow-lg), var(--glass-highlight);
  overflow: hidden;
}

/* ---- Header / nav --------------------------------------------------------- */
.site-header { position: sticky; top: 0; z-index: 50; background: transparent; }
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: color-mix(in srgb, var(--page) 55%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--glass-border-2);
  opacity: 0; transition: opacity .3s ease;
}
.site-header.scrolled::before { opacity: 1; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 1rem; }
.brand { font-weight: 600; color: var(--ink); letter-spacing: -.02em; font-size: 1.05rem; display: inline-flex; align-items: center; gap: .6rem; }
.brand .brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--grad-accent); color: #fff; font-size: .95rem; font-weight: 700; box-shadow: 0 4px 14px var(--accent-glow); }
.nav-links { display: flex; align-items: center; gap: .25rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-2); font-weight: 500; font-size: .96rem; padding: .5rem .85rem; border-radius: 999px; cursor: pointer; transition: background .15s, color .15s; }
.nav-links a:hover { background: var(--glass-strong); color: var(--ink); }
.nav-links a[aria-current] { color: var(--accent); background: var(--accent-soft); }

.theme-toggle, .nav-toggle {
  display: grid; place-items: center; width: 40px; height: 40px; flex: none;
  border: 1px solid var(--glass-border); border-radius: 999px;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  color: var(--ink-2); cursor: pointer;
  box-shadow: var(--glass-highlight);
  transition: background .15s, color .15s, border-color .15s, transform .12s, box-shadow .2s;
}
.theme-toggle:hover, .nav-toggle:hover { color: var(--ink); transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow), var(--glass-highlight); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
html.dark .theme-toggle .icon-sun { display: block; }
html.dark .theme-toggle .icon-moon { display: none; }
.nav-toggle { display: none; }

/* ---- Buttons (glass pill + cursor-tracing specular highlight) ------------- */
.btn {
  position: relative; overflow: hidden; isolation: isolate;
  --mx: 50%; --my: 50%;
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: inherit; font-weight: 600; font-size: .98rem; line-height: 1;
  padding: .85rem 1.5rem; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent;
  transition: transform .14s ease, background .25s ease, color .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn svg { width: 18px; height: 18px; }
.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; }

/* cursor-tracing specular highlight */
.btn::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
  opacity: 0; transition: opacity .25s ease; pointer-events: none;
  background: radial-gradient(130px circle at var(--mx) var(--my), rgba(255, 255, 255, .55), rgba(255, 255, 255, 0) 45%);
}
.btn:hover::after { opacity: 1; }

.btn-primary { background: var(--grad-accent); color: #fff; box-shadow: 0 8px 24px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, .3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, .45); }

.btn-ghost {
  background: var(--glass-bg); color: var(--ink); border-color: var(--glass-border);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-highlight);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 50%, var(--glass-border)); box-shadow: 0 10px 28px var(--accent-glow), var(--glass-highlight); }

/* ---- Hero (photo-free, text-led) ------------------------------------------ */
.hero { display: block; max-width: 58rem; }
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem; font-size: .85rem; font-weight: 500;
  color: var(--ink-2); background: var(--glass-bg); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  padding: .4rem .9rem; border-radius: 999px; margin-bottom: 1.3rem; box-shadow: var(--glass-highlight);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #54c98a; box-shadow: 0 0 0 3px rgba(84, 201, 138, .22), 0 0 12px rgba(84, 201, 138, .75); }
.hero h1 { margin-bottom: .35rem; }
.hero .lead { margin-bottom: 1.8rem; max-width: 56ch; }

/* ---- Window panel (the "app window" frame, à la the reference code blocks) - */
.window {
  position: relative; overflow: hidden; border-radius: var(--radius);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow-lg), var(--glass-highlight);
}
.window-bar {
  display: flex; align-items: center; gap: .5rem;
  padding: .7rem 1.1rem; border-bottom: 1px solid var(--glass-border-2);
  background: color-mix(in srgb, var(--page) 35%, transparent);
}
.window-bar .dot { width: 11px; height: 11px; border-radius: 50%; flex: none; }
.window-bar .dot-r { background: #e8615b; }
.window-bar .dot-a { background: #f5a623; }
.window-bar .dot-g { background: #54c98a; }
.window-name { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .04em; color: var(--muted); margin-left: .6rem; }
.window-body { padding: clamp(1.4rem, 3.4vw, 2.6rem); }

/* ---- Intro landing: text + portrait, then capabilities -------------------- */
.about-grid { display: grid; grid-template-columns: 1fr minmax(240px, 300px); gap: clamp(1.8rem, 5vw, 4rem); align-items: center; }
.about-intro .eyebrow { margin-bottom: .7rem; }
.about-intro h1 { margin-bottom: .6rem; }
.about-intro h2 { margin-bottom: .8rem; }
.about-intro .lead { margin-bottom: 1rem; }
.about-intro p:last-child { margin-bottom: 0; }
.about-intro .btn-row { margin-top: 1.6rem; }
.name-hl { color: var(--accent); }

.about-photo { position: relative; justify-self: center; }
.about-photo img {
  width: 100%; max-width: 290px; aspect-ratio: 760 / 947; object-fit: cover;
  border-radius: 16px; box-shadow: var(--glass-shadow-lg); border: 1px solid var(--glass-border);
}
/* Amber glow halo behind the portrait. */
.about-photo::before {
  content: ""; position: absolute; inset: -12%; z-index: -1; border-radius: 24px;
  background: var(--grad-accent); filter: blur(34px); opacity: .35;
}

.about-caps { margin-top: clamp(1.8rem, 4vw, 2.6rem); padding-top: clamp(1.6rem, 4vw, 2.4rem); border-top: 1px solid var(--glass-border-2); }
.about-caps > .eyebrow { margin-bottom: 1.2rem; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.cap-grid .skill-group { margin-bottom: 0; }

/* ---- Cards (glass) -------------------------------------------------------- */
.grid { display: grid; gap: var(--gap); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  position: relative;
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  padding: 1.6rem; box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--glass-shadow-lg), 0 0 0 1px var(--accent-soft), var(--glass-highlight); border-color: color-mix(in srgb, var(--accent) 45%, var(--glass-border)); }
.card h3 { margin-bottom: .4rem; }
.card .card-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 13px; background: var(--accent-soft); color: var(--accent); margin-bottom: 1rem; border: 1px solid var(--glass-border); box-shadow: 0 0 18px var(--accent-glow); }
.card .card-icon svg { width: 22px; height: 22px; }
.card p { color: var(--muted); margin: 0; font-size: .98rem; }

/* ---- Project cards -------------------------------------------------------- */
.project { display: flex; flex-direction: column; gap: .9rem; }
.project-head { display: flex; flex-direction: column; gap: .15rem; }
.project-sub { font-family: var(--font-mono); color: var(--accent); font-weight: 600; font-size: .76rem; text-transform: uppercase; letter-spacing: .12em; }
.project .desc { color: var(--ink-2); margin: 0; }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; padding: 0; list-style: none; }
.chip {
  font-size: .8rem; font-weight: 500; color: var(--ink-2); background: var(--glass-strong);
  border: 1px solid var(--glass-border); padding: .3rem .7rem; border-radius: 999px; font-family: var(--font-mono);
}
.achievements { margin: .2rem 0 0; padding: 0; list-style: none; display: grid; gap: .55rem; }
.achievements li { position: relative; padding-left: 1.5rem; color: var(--muted); font-size: .95rem; }
.achievements li::before { content: ""; position: absolute; left: 0; top: .55em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent-glow); }
.badge-featured { font-family: var(--font-mono); align-self: flex-start; font-size: .68rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: .25rem .6rem; border-radius: 999px; }

/* ---- Skills --------------------------------------------------------------- */
.skill-group { margin-bottom: 1.6rem; }
.skill-group h3 { font-family: var(--font-mono); font-size: .82rem; color: var(--muted); text-transform: uppercase; letter-spacing: .14em; font-weight: 600; margin-bottom: .7rem; }

/* ---- About split ---------------------------------------------------------- */
.split { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }

/* ---- Stats ---------------------------------------------------------------- */
.stats { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 1.5rem; }
.stat .num { font-size: 2rem; font-weight: 600; color: var(--ink); letter-spacing: -.02em; }
.stat .label { color: var(--muted); font-size: .9rem; }

/* ---- Contact -------------------------------------------------------------- */
.contact-links { display: grid; gap: .9rem; max-width: 480px; }
.contact-link {
  display: flex; align-items: center; gap: 1rem; padding: 1.1rem 1.3rem;
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  color: var(--ink); font-weight: 600; box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.contact-link:hover { transform: translateY(-2px); color: var(--ink); border-color: color-mix(in srgb, var(--accent) 50%, var(--glass-border)); box-shadow: 0 12px 30px var(--accent-glow), var(--glass-highlight); }
.contact-link .ci { display: grid; place-items: center; width: 44px; height: 44px; flex: none; border-radius: 13px; background: var(--accent-soft); color: var(--accent); border: 1px solid var(--glass-border); box-shadow: 0 0 16px var(--accent-glow); }
.contact-link .ci svg { width: 20px; height: 20px; }
.contact-link .ct { display: flex; flex-direction: column; gap: .1rem; }
.contact-link .ct span { font-weight: 400; color: var(--muted); font-size: .85rem; }

/* ---- CTA band ------------------------------------------------------------- */
.cta {
  text-align: center; background: var(--glass-bg); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-panel); padding: clamp(2rem, 5vw, 3.5rem);
  box-shadow: var(--glass-shadow-lg), var(--glass-highlight);
}
.cta h2 { margin-bottom: .6rem; }
.cta .lead { margin-inline: auto; }
.cta .btn-row { justify-content: center; margin-top: 1.4rem; }

/* ---- Section heads + hero name -------------------------------------------- */
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.section-head { max-width: 62ch; }

/* Callout: the chatbot is a live work sample */
.chat-note {
  display: flex; align-items: flex-start; gap: .8rem;
  margin-top: 1.5rem; padding: 1rem 1.2rem; max-width: 70ch;
  background: var(--accent-soft); border: 1px solid var(--glass-border-2);
  border-left: 3px solid var(--accent); border-radius: var(--radius);
  color: var(--ink-2); font-size: .96rem; line-height: 1.5;
}
.chat-note svg { width: 20px; height: 20px; color: var(--accent); flex: none; margin-top: .15rem; }
.chat-note strong { color: var(--ink); font-weight: 600; }
.hero-name { font-family: var(--font-mono); color: var(--accent); font-weight: 500; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 .8rem; }

/* ---- Service cards -------------------------------------------------------- */
.service-card { display: flex; flex-direction: column; }
.svc-outcome { color: var(--ink); font-weight: 600; font-size: 1.02rem; margin: 0 0 .5rem; }
.svc-desc { color: var(--muted); margin: 0 0 1.1rem; font-size: .96rem; }
.svc-list { list-style: none; margin: auto 0 0; padding: 0; display: grid; gap: .5rem; }
.svc-list li { display: flex; align-items: flex-start; gap: .55rem; font-size: .9rem; color: var(--ink-2); }
.svc-list svg { width: 16px; height: 16px; color: var(--accent); flex: none; margin-top: .15rem; }

/* ---- Process steps -------------------------------------------------------- */
.steps { counter-reset: step; }
.step {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  padding: 1.4rem; box-shadow: var(--glass-shadow), var(--glass-highlight);
}
.step-num { display: inline-block; font-family: var(--font-mono); font-weight: 700; font-size: .9rem; color: var(--accent); background: var(--accent-soft); padding: .25rem .6rem; border-radius: 999px; margin-bottom: .8rem; border: 1px solid var(--glass-border); }
.step h3 { font-size: 1.05rem; margin-bottom: .35rem; }
.step p { color: var(--muted); margin: 0; font-size: .93rem; }

/* ---- Case-study cards (reactive glass) ------------------------------------ */
.case-item { display: flex; }
.case-card {
  position: relative; width: 100%; display: flex; flex-direction: column; gap: .7rem;
  cursor: pointer; overflow: hidden;
}
.case-card::before {
  content: ""; position: absolute; inset: 0; z-index: 0; opacity: 0;
  background: radial-gradient(120% 90% at 0% 0%, var(--accent-soft), transparent 55%);
  transition: opacity .25s ease;
}
.case-card > * { position: relative; z-index: 1; }
.case-card:hover, .case-card:focus-visible {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--glass-border));
  box-shadow: var(--glass-shadow-lg), 0 0 30px var(--accent-glow), var(--glass-highlight);
}
.case-card:hover::before, .case-card:focus-visible::before { opacity: 1; }
.cs-cat { font-family: var(--font-mono); color: var(--accent); font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .13em; }
.cs-title { font-size: 1.18rem; margin: .2rem 0 0; }
.cs-tag { color: var(--muted); font-size: .94rem; margin: 0; }
.cs-metrics { display: flex; flex-wrap: wrap; gap: 1.1rem 1.5rem; margin: .3rem 0; }
.cs-metric { display: flex; flex-direction: column; gap: .1rem; }
.cs-metric .m-val { font-weight: 700; color: var(--ink); font-size: 1.02rem; letter-spacing: -.01em; }
.cs-metric .m-lab { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .04em; color: var(--muted); }
.cs-more { display: inline-flex; align-items: center; gap: .4rem; margin-top: auto; color: var(--accent); font-weight: 600; font-size: .9rem; }
.cs-more svg { width: 16px; height: 16px; transition: transform .2s ease; }
.case-card:hover .cs-more svg, .case-card:focus-visible .cs-more svg { transform: translate(3px, -3px); }

/* ---- Case-study modal (<dialog>, frosted) --------------------------------- */
.cs-modal {
  position: relative; margin: auto; padding: 0; border: 1px solid var(--glass-border);
  width: min(760px, calc(100% - 1.5rem)); max-height: 88vh;
  border-radius: 22px; background: color-mix(in srgb, var(--page) 70%, transparent); color: var(--ink-2);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow-lg), var(--glass-highlight); overflow: hidden;
}
.cs-modal::backdrop { background: rgba(5, 6, 12, .55); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.cs-modal-inner { padding: clamp(1.5rem, 3.6vw, 2.6rem); max-height: 88vh; overflow-y: auto; }
@media (prefers-reduced-motion: no-preference) {
  .cs-modal[open] .cs-modal-inner { animation: modal-in .26s var(--ease) both; }
  @keyframes modal-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
}
.cs-close {
  position: absolute; top: .9rem; right: .9rem; z-index: 3;
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 999px;
  border: 1px solid var(--glass-border); background: var(--glass-strong); color: var(--ink-2); cursor: pointer;
  transition: background .15s, color .15s, transform .12s;
}
.cs-close:hover { background: var(--glass-bg); color: var(--ink); transform: rotate(90deg); }
.cs-close svg { width: 18px; height: 18px; }
.cs-modal-title { font-size: clamp(1.5rem, 3.5vw, 2rem); margin: .4rem 0 .3rem; padding-right: 2.5rem; }
.cs-modal-tag { color: var(--ink-2); font-size: 1.05rem; margin: 0 0 1.2rem; }
.cs-metrics--modal { gap: 1.5rem 2rem; padding: 1.1rem 0; margin: 0 0 .5rem; border-top: 1px solid var(--glass-border); border-bottom: 1px solid var(--glass-border); }
.cs-metrics--modal .m-val { font-size: 1.3rem; }
.cs-section { margin-top: 1.5rem; }
.cs-section h4 { font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .13em; color: var(--accent); margin: 0 0 .6rem; }
.cs-section > p { margin: 0; color: var(--ink-2); }
.cs-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .65rem; }
.cs-list li { position: relative; padding-left: 1.5rem; color: var(--ink-2); }
.cs-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent-glow); }
body.modal-open { overflow: hidden; }

/* ---- About window (floating <dialog>, opened from the nav's About tab) ----- */
.about-modal { width: min(920px, calc(100% - 1.5rem)); display: flex; flex-direction: column; }
.about-modal .window-bar { flex: none; }
.about-modal-body { overflow-y: auto; }
/* The red traffic-light dot IS the close button; it reveals an × on bar hover. */
.window-bar .dot-close { border: none; padding: 0; cursor: pointer; position: relative; transition: filter .15s; }
.window-bar .dot-close:hover { filter: brightness(1.12); }
.window-bar:hover .dot-close::before,
.window-bar .dot-close:focus-visible::before {
  content: "\00d7"; position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 11px; line-height: 1; font-weight: 700; color: #5a0f0c;
}
@media (prefers-reduced-motion: no-preference) {
  .about-modal[open] { animation: window-in .3s var(--ease) both; }
  @keyframes window-in { from { opacity: 0; transform: translateY(16px) scale(.975); } to { opacity: 1; transform: none; } }
}

/* ---- Footer (over the aurora, outside the panel) -------------------------- */
.site-footer { background: transparent; }
.site-footer .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1.8rem; }
.site-footer p { font-family: var(--font-mono); margin: 0; color: var(--muted); font-size: .8rem; letter-spacing: .02em; }
.footer-links { display: flex; gap: 1.2rem; }
.footer-links a { color: var(--muted); font-size: .9rem; }
.footer-links a:hover { color: var(--accent); }

/* ---- Responsive (tablet + mobile) ----------------------------------------- */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { order: -1; justify-self: start; }
  .about-photo img { width: min(220px, 50vw); }
  .cap-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 1rem; }
  main { margin-inline: .5rem; border-radius: 22px; }
  .grid-3, .grid-4, .cap-grid { grid-template-columns: 1fr; }
  .cs-metrics { gap: .9rem 1.2rem; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; position: absolute; top: 64px; left: .5rem; right: .5rem;
    flex-direction: column; align-items: stretch; gap: .15rem; padding: .6rem;
    background: color-mix(in srgb, var(--page) 75%, transparent);
    -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border); border-radius: 18px; box-shadow: var(--glass-shadow-lg);
  }
  .nav-links.open a { padding: .75rem .9rem; border-radius: 12px; }
  .nav-toggle { display: grid; }
  .nav-toggle svg { width: 20px; height: 20px; }
  .stats { gap: 1.5rem; }
}

/* ---- Scroll reveal animations --------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s var(--ease),
              transform .6s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

/* Subtle panel entrance on load */
@media (prefers-reduced-motion: no-preference) {
  main { animation: panel-in .5s var(--ease) both; }
  @keyframes panel-in { from { opacity: 0; transform: translateY(12px) scale(.995); } to { opacity: 1; transform: none; } }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  body::before { animation: none; }
}

/* ==========================================================================
   Chatbot widget — floating amber launcher + frosted-glass chat window
   ========================================================================== */
.chat-widget { position: fixed; right: clamp(1rem, 3vw, 1.6rem); bottom: clamp(1rem, 3vw, 1.6rem); z-index: 80; }

/* Launcher pill */
.chat-launcher {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .8rem 1.15rem; border: none; border-radius: 999px; cursor: pointer;
  font-family: var(--font); font-weight: 600; font-size: .95rem; color: #1a1205;
  background: var(--grad-accent);
  box-shadow: 0 10px 30px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, .35);
  transition: transform .18s var(--ease), box-shadow .2s ease, opacity .2s ease;
}
.chat-launcher:hover { transform: translateY(-2px); box-shadow: 0 14px 38px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, .5); }
.chat-launcher svg { width: 20px; height: 20px; }
.chat-launcher .cl-close { display: none; }
.chat-launcher .cl-label { white-space: nowrap; }
/* Gentle attention pulse until first opened. */
.chat-launcher::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
  box-shadow: 0 0 0 0 var(--accent-glow); animation: chat-pulse 2.8s ease-out infinite;
}
@keyframes chat-pulse { 0% { box-shadow: 0 0 0 0 var(--accent-glow); } 70%, 100% { box-shadow: 0 0 0 16px rgba(0,0,0,0); } }
.chat-widget.open .chat-launcher { transform: scale(.6); opacity: 0; pointer-events: none; }

/* Chat window */
.chat-panel {
  position: absolute; right: 0; bottom: 0;
  display: flex; flex-direction: column;
  width: min(384px, calc(100vw - 2rem)); height: min(600px, calc(100vh - 6rem));
  border: 1px solid var(--glass-border); border-radius: 20px; overflow: hidden;
  background: color-mix(in srgb, var(--page) 82%, transparent);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow-lg), var(--glass-highlight);
  color: var(--ink-2);
}
.chat-panel[hidden] { display: none; }
@media (prefers-reduced-motion: no-preference) {
  .chat-panel:not([hidden]) { animation: chat-in .28s var(--ease) both; transform-origin: bottom right; }
  @keyframes chat-in { from { opacity: 0; transform: translateY(18px) scale(.96); } to { opacity: 1; transform: none; } }
}

/* Header */
.chat-head { display: flex; align-items: center; justify-content: space-between; gap: .8rem; padding: .85rem 1rem; border-bottom: 1px solid var(--glass-border-2); background: color-mix(in srgb, var(--page) 40%, transparent); }
.chat-head-id { display: flex; align-items: center; gap: .7rem; min-width: 0; }
.chat-avatar { display: grid; place-items: center; width: 38px; height: 38px; flex: none; border-radius: 11px; background: var(--grad-accent); color: #fff; font-weight: 700; box-shadow: 0 4px 14px var(--accent-glow); }
.chat-head-text { min-width: 0; }
.chat-title { font-family: var(--font-head); font-weight: 700; font-size: .98rem; color: var(--ink); letter-spacing: -.01em; }
.chat-sub { display: flex; align-items: center; gap: .4rem; font-family: var(--font-mono); font-size: .68rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.chat-status-dot { width: 7px; height: 7px; border-radius: 50%; background: #54c98a; box-shadow: 0 0 8px rgba(84, 201, 138, .8); flex: none; }
.chat-close { display: grid; place-items: center; width: 32px; height: 32px; flex: none; border: 1px solid var(--glass-border); border-radius: 999px; background: var(--glass-strong); color: var(--ink-2); cursor: pointer; transition: background .15s, color .15s, transform .12s; }
.chat-close:hover { color: var(--ink); transform: rotate(90deg); }
.chat-close svg { width: 16px; height: 16px; }

/* Message log */
.chat-log { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .7rem; scroll-behavior: smooth; }
.msg { max-width: 86%; font-size: .92rem; line-height: 1.55; }
.msg-body { padding: .7rem .9rem; border-radius: 14px; }
.msg-bot { align-self: flex-start; }
.msg-bot .msg-body { background: var(--glass-strong); border: 1px solid var(--glass-border-2); border-bottom-left-radius: 5px; color: var(--ink-2); }
.msg-user { align-self: flex-end; }
.msg-user .msg-body { background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); border-bottom-right-radius: 5px; color: var(--ink); }
.msg-body p { margin: 0 0 .5rem; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body ul { margin: .3rem 0; padding-left: 1.1rem; }
.msg-body li { margin: .2rem 0; }
.msg-body strong { color: var(--ink); font-weight: 650; }
.msg-body a { color: var(--accent); text-decoration: underline; }
.msg-body code { font-family: var(--font-mono); font-size: .85em; background: var(--glass-bg-2); border: 1px solid var(--glass-border-2); border-radius: 5px; padding: .05rem .35rem; }
/* Source chips under an answer */
.msg-sources { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .5rem; }
.msg-source { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); background: var(--glass-bg-2); border: 1px solid var(--glass-border-2); padding: .18rem .45rem; border-radius: 999px; }
/* Typing indicator */
.msg-typing .msg-body { display: inline-flex; gap: .28rem; align-items: center; }
.msg-typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); display: inline-block; animation: typing 1.2s infinite ease-in-out; }
.msg-typing i:nth-child(2) { animation-delay: .18s; }
.msg-typing i:nth-child(3) { animation-delay: .36s; }
@keyframes typing { 0%, 60%, 100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-4px); opacity: 1; } }

/* Suggested-question chips (initial + follow-ups after each answer) */
.chat-suggestions { display: flex; flex-wrap: wrap; gap: .4rem; padding: 0 1rem .6rem; }
.chat-suggestions.hidden { display: none; }
.chat-chip { font-family: var(--font); font-size: .8rem; color: var(--ink-2); background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 999px; padding: .4rem .75rem; cursor: pointer; transition: border-color .15s, color .15s, transform .12s; text-align: left; }
.chat-chip:hover { color: var(--ink); border-color: color-mix(in srgb, var(--accent) 55%, var(--glass-border)); transform: translateY(-1px); }

/* Clickable follow-up questions appended under a bot answer */
.chat-followups { display: flex; flex-direction: column; gap: .4rem; margin-top: .1rem; }
.chat-followups-label { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.chat-followups-row { display: flex; flex-wrap: wrap; gap: .4rem; }

/* Input row */
.chat-input-row { display: flex; align-items: flex-end; gap: .5rem; padding: .7rem; border-top: 1px solid var(--glass-border-2); background: color-mix(in srgb, var(--page) 40%, transparent); }
.chat-text { flex: 1; resize: none; max-height: 120px; font-family: var(--font); font-size: .92rem; line-height: 1.45; color: var(--ink); background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 14px; padding: .6rem .8rem; outline: none; transition: border-color .15s; }
.chat-text::placeholder { color: var(--muted); }
.chat-text:focus { border-color: color-mix(in srgb, var(--accent) 55%, var(--glass-border)); }
.chat-send { display: grid; place-items: center; width: 40px; height: 40px; flex: none; border: none; border-radius: 12px; cursor: pointer; color: #1a1205; background: var(--grad-accent); box-shadow: 0 6px 16px var(--accent-glow); transition: transform .14s, box-shadow .2s, opacity .2s; }
.chat-send:hover { transform: translateY(-1px); }
.chat-send:disabled { opacity: .5; cursor: default; transform: none; }
.chat-send svg { width: 18px; height: 18px; }

/* Footer credit */
.chat-foot { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); text-align: center; padding: .5rem; border-top: 1px solid var(--glass-border-2); }

@media (max-width: 480px) {
  .chat-panel { width: calc(100vw - 1.5rem); height: min(72vh, 560px); }
  .chat-launcher .cl-label { display: none; }
  .chat-launcher { padding: .85rem; }
}

/* --- Free proof-of-concept CTA band ---------------------------------------- */
.poc-inner {
  position: relative;
  overflow: hidden;
  max-width: 760px;
  margin: clamp(2rem, 5vw, 3.2rem) auto;
  text-align: center;
  padding: clamp(2rem, 5vw, 3.4rem);
  border-radius: var(--radius-panel);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border-2);
  box-shadow: var(--glass-shadow);
}
.poc-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 130% at 50% -10%, var(--accent-soft), transparent 62%);
  pointer-events: none;
}
.poc-inner > * { position: relative; }
.poc-inner .lead { margin-left: auto; margin-right: auto; }
.poc-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.9rem;
}

/* --- Contact form modal (native form -> n8n webhook) ----------------------- */
.contact-form-modal { width: min(560px, calc(100% - 1.5rem)); }
.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.cf-field {
  display: flex; flex-direction: column; gap: .4rem;
  font-size: .9rem; font-weight: 600; color: var(--ink-2);
}
.cf-field .cf-opt { color: var(--muted); font-weight: 400; }
.contact-form input,
.contact-form textarea {
  font: inherit; font-weight: 400; color: var(--ink);
  background: var(--glass-bg-2);
  border: 1px solid var(--glass-border-2);
  border-radius: 10px; padding: .7rem .85rem; width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted); }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.contact-form textarea { resize: vertical; min-height: 100px; }
.cf-submit { margin-top: .2rem; align-self: flex-start; }
.cf-status { font-size: .88rem; color: var(--muted); min-height: 1.1em; }
.cf-status.err { color: #e0574f; }
.cf-done { padding: 1.4rem 0; font-size: 1.05rem; color: var(--ink-2); line-height: 1.5; }
.cf-done strong { color: var(--ink); }