/* ===================================================================
   SAMRIDDHI GURUNG — PORTFOLIO
   Static HTML/CSS/JS. Shared by index.html and resqnet.html.
   All colours come from the tokens below; change them here only.
   =================================================================== */

/* -------------------------------------------------------------------
   DESIGN TOKENS
   ------------------------------------------------------------------- */
:root {
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Brand accents */
  --accent-pink: #FF0080;          /* primary accent: fills, borders, icons */
  --accent-pink-strong: #E0006F;   /* button background (white text = 4.7:1) */
  --accent-pink-text: #FF4DA6;     /* pink used as small text on dark bg */
  --accent-pink-soft: rgba(255, 0, 128, 0.12);
  --accent-blue: #38BDF8;          /* secondary accent: diagrams, code, details */
  --accent-blue-text: #7DD3FC;
  --accent-blue-soft: rgba(56, 189, 248, 0.12);
  --gradient-brand: linear-gradient(90deg, var(--accent-pink), var(--accent-blue));

  /* Neutrals (dark theme, default) */
  --bg: #0A0C11;
  --bg-elevated: #10131A;
  --bg-sunken: #07080C;
  --surface: #131721;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #E8EDF4;
  --text-secondary: #A3AEBF;
  --text-muted: #8590A2;
  --code-bg: #0D1017;

  --radius-sm: 6px;
  --radius-md: 10px;
  --header-h: 64px;
  --container: 1120px;
  --transition: 0.2s ease;

  color-scheme: dark;
}

[data-theme="light"] {
  --accent-pink-strong: #D10068;
  --accent-pink-text: #C2006A;     /* 5.3:1 on --bg */
  --accent-pink-soft: rgba(255, 0, 128, 0.08);
  --accent-blue: #0284C7;
  --accent-blue-text: #0369A1;
  --accent-blue-soft: rgba(2, 132, 199, 0.08);

  --bg: #F7F8FB;
  --bg-elevated: #FFFFFF;
  --bg-sunken: #EEF1F6;
  --surface: #FFFFFF;
  --border: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.20);
  --text: #0F172A;
  --text-secondary: #3F4A5C;
  --text-muted: #566174;
  --code-bg: #0D1017;              /* code blocks stay dark in both themes */

  color-scheme: light;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

img, svg, video, iframe { display: block; max-width: 100%; }

/* Ambient background. z-index -1 sits above the page background (body's
   background belongs to the root) and below all content, so nothing else
   needs a z-index. Drawn by initAmbientCanvas() in main.js. */
#canvas-ambient {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.7;
}

a { color: inherit; }

::selection { background: var(--accent-pink); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent-pink);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 200;
  padding: 0.5rem 0.9rem;
  background: var(--accent-pink-strong);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--font-mono); }

/* Inline links inside running text */
.text-link {
  color: var(--accent-pink-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.text-link:hover { color: var(--text); }

/* -------------------------------------------------------------------
   HEADER
   ------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  position: relative;
  overflow: hidden;
}
.brand-mark::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--gradient-brand);
}

.site-nav { display: flex; align-items: center; gap: 0.25rem; }

.nav-list {
  display: flex;
  list-style: none;
  gap: 0.15rem;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 0.45rem 0.7rem;
  font-size: 0.87rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}
.nav-list a::after {
  content: '';
  position: absolute;
  left: 0.7rem; right: 0.7rem; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-pink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-list a:hover { color: var(--text); }
.nav-list a.is-active,
.nav-list a[aria-current="page"] { color: var(--text); }
.nav-list a.is-active::after,
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 0.4rem; }

.icon-btn {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.icon-btn:hover { color: var(--accent-pink-text); border-color: var(--accent-pink); }
.icon-btn svg { width: 17px; height: 17px; }

/* Theme toggle shows the icon for the theme you will switch to */
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.menu-toggle { display: none; }

/* -------------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  font: 600 0.9rem/1.2 var(--font-body);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn-primary { background: var(--accent-pink-strong); color: #fff; }
.btn-primary:hover { background: #C20062; transform: translateY(-1px); }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover { border-color: var(--accent-pink); color: var(--accent-pink-text); }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* -------------------------------------------------------------------
   SECTIONS
   ------------------------------------------------------------------- */
.section { padding: 96px 0; border-top: 1px solid var(--border); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-pink-text);
  margin-bottom: 0.9rem;
}
.section-label::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.section-intro {
  max-width: 62ch;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.section-head { margin-bottom: 3rem; }

/* -------------------------------------------------------------------
   HERO
   ------------------------------------------------------------------- */
.hero { padding: 96px 0 88px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 4rem;
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.hero-eyebrow strong { color: var(--accent-pink-text); font-weight: 500; }

.hero-name {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

.hero-tagline {
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: -0.01em;
  max-width: 34ch;
  margin-bottom: 1.25rem;
}
.hero-tagline .hl {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-intro {
  max-width: 58ch;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.75rem;
  font-size: 0.88rem;
}
.hero-social a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.hero-social a:hover { color: var(--accent-pink-text); }
.hero-social svg { width: 17px; height: 17px; }

/* Portrait: circle with a thin pink-to-blue ring (a transparent border
   showing the gradient background behind it). */
.portrait {
  width: min(100%, 240px);
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  border-radius: 50%;
  border: 2px solid transparent;
  background:
    linear-gradient(var(--bg-elevated), var(--bg-elevated)) padding-box,
    var(--gradient-brand) border-box;
  box-shadow: -6px 0 18px var(--accent-pink-soft), 6px 0 18px var(--accent-blue-soft);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.portrait-initials {
  font-family: var(--font-mono);
  font-size: 4.5rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--text);
}
/* profile.jpeg has the figure low and to the right of a wide frame, so
   cover alone leaves the face small and off-centre. This zooms in on it;
   .portrait does the circular clipping. */
.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 100% 50%;
  transform: scale(2);
  transform-origin: 83.4% 90%;
}

.hero-facts {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.6rem;
  font-size: 0.85rem;
}
.hero-facts div { display: grid; grid-template-columns: 88px 1fr; gap: 0.75rem; }
.hero-facts dt { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); padding-top: 0.12rem; }
.hero-facts dd { color: var(--text-secondary); }

/* -------------------------------------------------------------------
   ABOUT
   ------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 4rem;
}
.about-body p { color: var(--text-secondary); max-width: 66ch; }
.about-body p + p { margin-top: 1.1rem; }
.about-body strong { color: var(--text); font-weight: 600; }

/* -------------------------------------------------------------------
   SKILLS
   ------------------------------------------------------------------- */
.skills-group + .skills-group { margin-top: 3rem; }

.skills-group-title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.skills-group-title span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

.skills-list { list-style: none; }
.skills-list li {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.skills-category {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-pink-text);
  padding-top: 0.1rem;
}
.skills-items { color: var(--text); font-size: 0.95rem; }
.skills-items .sep { color: var(--text-muted); margin: 0 0.15rem; white-space: pre-wrap; }
.skills-note {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------------------
   PROJECTS
   ------------------------------------------------------------------- */
.project-feature {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  overflow: hidden;
}

.project-feature-body {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 3rem;
  padding: 2.5rem;
}

.project-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-pink-text);
  margin-bottom: 0.6rem;
}

.project-name {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.project-subtitle {
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin: 0.35rem 0 1.25rem;
}
.project-desc { color: var(--text-secondary); margin-bottom: 1.5rem; }

.check-list { list-style: none; display: grid; gap: 0.6rem; }
.check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-secondary);
  font-size: 0.93rem;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent-pink);
}
.check-list li strong { color: var(--text); font-weight: 600; }

.meta-block + .meta-block { margin-top: 1.5rem; }
.meta-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.meta-value { font-size: 0.93rem; color: var(--text-secondary); }

.tag-list { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg);
}

.project-actions { margin-top: 2rem; }

.project-secondary {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2rem 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.project-secondary .project-name { font-size: 1.4rem; }
.project-secondary .project-subtitle { margin-bottom: 0.9rem; font-size: 0.95rem; }

/* -------------------------------------------------------------------
   VIDEO PLAYER (reusable — configured by data attributes, see js/main.js)
   ------------------------------------------------------------------- */
.video-player {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-sunken);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.video-player.is-standalone {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.video-player video,
.video-player iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1.5rem;
  background:
    linear-gradient(var(--border) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, var(--border) 1px, transparent 1px) 0 0 / 32px 32px,
    var(--bg-sunken);
}
.video-placeholder-inner { max-width: 420px; }
.video-placeholder-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.1rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--accent-pink);
  color: var(--accent-pink-text);
  background: var(--bg-elevated);
}
.video-placeholder-icon svg { width: 22px; height: 22px; margin-left: 3px; }
.video-placeholder-title { font-weight: 600; font-size: 1.05rem; margin-bottom: 0.35rem; }
.video-placeholder-text { font-size: 0.88rem; color: var(--text-muted); }
.video-placeholder-tag {
  display: inline-block;
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-blue-text);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
}

/* -------------------------------------------------------------------
   EXPERIENCE & EDUCATION
   ------------------------------------------------------------------- */
.entry {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 4rem;
}
.entry-meta { font-size: 0.9rem; color: var(--text-muted); }
.entry-role { font-size: 1.2rem; font-weight: 600; letter-spacing: -0.01em; }
.entry-org { color: var(--text-secondary); margin: 0.2rem 0 0.4rem; }
.entry-date { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-pink-text); }

.practice-list { list-style: none; display: grid; gap: 1.75rem; }
.practice-list h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.practice-list h4::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.6rem;
  border-radius: 2px;
  background: var(--accent-blue);
  vertical-align: 0.1em;
}
.practice-list ul { list-style: none; display: grid; gap: 0.4rem; padding-left: 1.15rem; }
.practice-list ul li { color: var(--text-secondary); font-size: 0.94rem; position: relative; }
.practice-list ul li::before {
  content: '–';
  position: absolute;
  left: -1rem;
  color: var(--text-muted);
}

.edu-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.edu-details span strong { color: var(--text); font-weight: 600; }

/* -------------------------------------------------------------------
   CONTACT
   ------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 4rem;
  align-items: start;
}
.contact-list { list-style: none; border-top: 1px solid var(--border); }
.contact-list li { border-bottom: 1px solid var(--border); }
.contact-list a {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0.25rem;
  text-decoration: none;
  transition: color var(--transition), padding var(--transition);
}
.contact-list .contact-key { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); }
.contact-list .contact-value { font-weight: 500; overflow-wrap: anywhere; }
.contact-list svg { width: 16px; height: 16px; color: var(--text-muted); transition: color var(--transition), transform var(--transition); }
.contact-list a:hover .contact-value { color: var(--accent-pink-text); }
.contact-list a:hover svg { color: var(--accent-pink-text); transform: translate(2px, -2px); }

/* -------------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.footer-links { display: flex; gap: 1.25rem; list-style: none; }
.footer-links a { text-decoration: none; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent-pink-text); }

/* -------------------------------------------------------------------
   CASE STUDY PAGE (resqnet.html)
   ------------------------------------------------------------------- */
.cs-hero { padding: 64px 0 40px; }

.back-link {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.87rem;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 2rem;
  transition: color var(--transition);
}
.back-link:hover { color: var(--accent-pink-text); }
.back-link svg { width: 15px; height: 15px; }

.cs-title {
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 1rem;
}
.cs-lead {
  max-width: 64ch;
  font-size: 1.12rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.cs-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  padding: 1.5rem 0;
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cs-meta dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}
.cs-meta dd { font-size: 0.92rem; color: var(--text); }

.cs-video { padding-bottom: 24px; }
.cs-video figcaption { margin-top: 0.75rem; font-size: 0.85rem; color: var(--text-muted); }

.cs-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 4rem;
  padding-top: 56px;
  padding-bottom: 96px;
}

.cs-toc { position: sticky; top: calc(var(--header-h) + 32px); align-self: start; }
.cs-toc ol { list-style: none; display: grid; gap: 0.15rem; border-left: 1px solid var(--border); }
.cs-toc a {
  display: block;
  padding: 0.35rem 0 0.35rem 1rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 0.86rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition);
}
.cs-toc a:hover { color: var(--text); }
.cs-toc a.is-active { color: var(--text); border-left-color: var(--accent-pink); }
.cs-toc .toc-num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-pink-text); margin-right: 0.4rem; }

.cs-content { min-width: 0; }
.cs-section + .cs-section { margin-top: 4.5rem; padding-top: 4.5rem; border-top: 1px solid var(--border); }
.cs-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 1.25rem;
}
.cs-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}
.cs-section p { color: var(--text-secondary); max-width: 70ch; }
.cs-section p + p { margin-top: 1rem; }
.cs-section p strong, .cs-section li strong { color: var(--text); font-weight: 600; }
.cs-section .check-list { margin-top: 1rem; }
.cs-section code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  color: var(--text);
}

/* Persona / data tables */
.table-wrap { overflow-x: auto; margin-top: 1.25rem; border: 1px solid var(--border); border-radius: var(--radius-md); }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 560px; }
.data-table th, .data-table td { text-align: left; padding: 0.85rem 1rem; vertical-align: top; border-bottom: 1px solid var(--border); }
.data-table tr:last-child td { border-bottom: 0; }
.data-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-elevated);
}
.data-table td { color: var(--text-secondary); }
.data-table td:first-child { color: var(--text); font-weight: 600; white-space: nowrap; }

/* Figures, diagrams and screenshots */
.cs-figure { margin-top: 1.75rem; }
.cs-figure figcaption { margin-top: 0.7rem; font-size: 0.84rem; color: var(--text-muted); max-width: 70ch; }
.cs-figure img { width: 100%; height: auto; border-radius: var(--radius-md); border: 1px solid var(--border); }

.diagram {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  padding: 1.25rem;
  overflow-x: auto;
}
.diagram svg { min-width: 640px; width: 100%; height: auto; }
.diagram .d-box { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1; }
.diagram .d-box-core { fill: var(--surface); stroke: var(--accent-pink); stroke-width: 1.5; }
.diagram .d-box-blue { fill: var(--surface); stroke: var(--accent-blue); stroke-width: 1.2; }
.diagram .d-title { fill: var(--text); font: 600 13px var(--font-body); }
.diagram .d-sub { fill: var(--text-muted); font: 400 11px var(--font-mono); }
.diagram .d-label { fill: var(--accent-pink-text); font: 500 10.5px var(--font-mono); }
.diagram .d-label-blue { fill: var(--accent-blue-text); font: 500 10.5px var(--font-mono); }
.diagram .d-line { stroke: var(--text-muted); stroke-width: 1.2; fill: none; }
.diagram .d-line-blue { stroke: var(--accent-blue); stroke-width: 1.2; fill: none; stroke-dasharray: 4 3; }
.diagram .d-line-pink { stroke: var(--accent-pink); stroke-width: 1.4; fill: none; }
.diagram .d-arrow { fill: var(--text-muted); }
.diagram .d-arrow-blue { fill: var(--accent-blue); }
.diagram .d-arrow-pink { fill: var(--accent-pink); }
.diagram .d-group { fill: none; stroke: var(--border); stroke-dasharray: 3 3; }

.screens { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }

/* Code excerpts (always dark for legibility) */
.code-block {
  margin-top: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--code-bg);
}
.code-block-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #8590A2;
}
.code-block-head span { min-width: 0; overflow-wrap: anywhere; }
.code-block-head a { color: #7DD3FC; text-decoration: none; white-space: nowrap; }
.code-block-head a:hover { text-decoration: underline; }
.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  color: #D6DEEA;
  tab-size: 4;
}
.code-block .c { color: #6B7A90; }
.code-block .k { color: #FF4DA6; }
.code-block .s { color: #7DD3FC; }

/* Lifecycle steps */
.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  list-style: none;
  margin-top: 1.25rem;
}
.flow li {
  position: relative;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  font-size: 0.86rem;
  color: var(--text-secondary);
}
.flow li strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-pink-text);
  margin-bottom: 0.35rem;
}

.note {
  margin-top: 1.25rem;
  padding: 0.9rem 1.1rem;
  border-left: 2px solid var(--accent-blue);
  background: var(--accent-blue-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.cs-end {
  padding: 3rem 0 0;
  margin-top: 4.5rem;
  border-top: 1px solid var(--border);
}

/* -------------------------------------------------------------------
   REVEAL ON SCROLL (only when JS runs and motion is allowed)
   ------------------------------------------------------------------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* -------------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-aside { max-width: 300px; }
  .about-grid, .entry, .contact-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .project-feature-body { grid-template-columns: 1fr; gap: 2rem; }
  .project-secondary { grid-template-columns: 1fr; gap: 1.5rem; }
  .cs-layout { grid-template-columns: 1fr; gap: 2rem; }
  .cs-toc { position: static; }
  .cs-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .menu-toggle { display: inline-grid; }
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    padding: 0.75rem 16px 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
  }
  .site-nav.is-open { display: block; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list a { padding: 0.75rem 0.25rem; font-size: 0.95rem; }
  .nav-list a::after { left: 0.25rem; right: auto; width: 24px; bottom: 6px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 72px 0; }
  .hero { padding: 64px 0; }
  .skills-list li { grid-template-columns: minmax(0, 1fr); gap: 0.35rem; }
  .project-feature-body { padding: 1.5rem; }
  .project-secondary { padding: 1.5rem; }
  .contact-list a { grid-template-columns: 80px minmax(0, 1fr) 16px; }
  .flow { grid-template-columns: 1fr; }
  .cs-meta { grid-template-columns: 1fr 1fr; }
  .btn-row .btn { flex: 1 1 auto; }
}