/* ============================================================
   Kesav Patneedi — portfolio
   Palette: warm neutral base + amber/copper accent
   ============================================================ */

/* ---------- Tokens: light (default) ---------- */
:root {
  --bg:            #fbfaf8;
  --bg-alt:        #f4f1ec;
  --surface:       #ffffff;
  --text:          #171614;
  --text-mid:      #45423c;
  --text-muted:    #706c64;
  --border:        #e6e1d9;
  --border-strong: #d5cec3;
  --accent:        #b45309;
  --accent-hover:  #92400e;
  --accent-soft:   rgba(180, 83, 9, 0.09);
  --on-accent:     #ffffff;
  --shadow-sm:     0 1px 2px rgba(23, 22, 20, .05);
  --shadow-md:     0 4px 18px -6px rgba(23, 22, 20, .12);
  --shadow-lg:     0 18px 44px -22px rgba(23, 22, 20, .30);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1080px;
  --radius: 14px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- Tokens: dark ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:            #121110;
    --bg-alt:        #191816;
    --surface:       #1c1b18;
    --text:          #f6f4f0;
    --text-mid:      #cbc6bd;
    --text-muted:    #9c968c;
    --border:        #2c2a26;
    --border-strong: #3d3a34;
    --accent:        #f0a029;
    --accent-hover:  #f7b955;
    --accent-soft:   rgba(240, 160, 41, 0.13);
    --on-accent:     #1a1409;
    --shadow-sm:     0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md:     0 4px 18px -6px rgba(0, 0, 0, .5);
    --shadow-lg:     0 18px 44px -22px rgba(0, 0, 0, .8);
  }
}

:root[data-theme="dark"] {
  --bg:            #121110;
  --bg-alt:        #191816;
  --surface:       #1c1b18;
  --text:          #f6f4f0;
  --text-mid:      #cbc6bd;
  --text-muted:    #9c968c;
  --border:        #2c2a26;
  --border-strong: #3d3a34;
  --accent:        #f0a029;
  --accent-hover:  #f7b955;
  --accent-soft:   rgba(240, 160, 41, 0.13);
  --on-accent:     #1a1409;
  --shadow-sm:     0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md:     0 4px 18px -6px rgba(0, 0, 0, .5);
  --shadow-lg:     0 18px 44px -22px rgba(0, 0, 0, .8);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}

h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; font-weight: 600; }
p  { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a  { color: inherit; text-decoration: none; }
strong { font-weight: 600; color: var(--text); }

svg {
  width: 18px; height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}
svg.filled { fill: currentColor; stroke: none; }

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: 8px;
  font-size: .9rem;
}
.skip-link:focus { left: 16px; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(12px);
  -webkit-backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--border); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  font-weight: 600;
  letter-spacing: -0.015em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: .95rem;
  font-weight: 700;
}
.brand-name { font-size: .98rem; }

.nav { display: flex; gap: 28px; }
.nav a {
  position: relative;
  font-size: .92rem;
  color: var(--text-muted);
  transition: color .2s var(--ease);
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -5px;
  width: 100%; height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { transform: scaleX(1); }

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text-mid);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}
.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--bg-alt);
}
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun  { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun  { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding: clamp(72px, 13vh, 128px) 0 clamp(56px, 9vh, 96px);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -260px; left: 50%;
  width: 900px; height: 640px;
  transform: translateX(-52%);
  background: radial-gradient(closest-side, var(--accent-soft), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 64px;
}

.hero-portrait { position: relative; }
.hero-portrait picture { display: block; }

/* Cut-out portrait floats directly on the page — no frame, no background. */
.portrait {
  display: block;
  position: relative;
  width: 300px;
  height: auto;
  /* drop-shadow follows the silhouette's alpha, unlike box-shadow. */
  filter: drop-shadow(0 18px 28px rgba(23, 22, 20, .22));
}
:root[data-theme="dark"] .portrait { filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .6)); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .portrait { filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .6)); }
}

/* Soft accent disc grounds the figure so it doesn't look like it's floating in space. */
.hero-portrait::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 6%;
  width: 300px;
  aspect-ratio: 1 / 1;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(closest-side,
              color-mix(in srgb, var(--accent) 22%, transparent),
              transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 26px;
  padding: 6px 14px 6px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .01em;
  color: var(--text-muted);
}
.eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #16a34a;
  box-shadow: 0 0 0 3px rgba(22, 163, 74, .18);
}

.hero-name {
  font-size: clamp(2.9rem, 8.5vw, 5.1rem);
  letter-spacing: -0.042em;
  font-weight: 700;
  margin-bottom: 14px;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(.82rem, 2.2vw, .95rem);
  color: var(--accent);
  letter-spacing: .02em;
  margin-bottom: 26px;
}
.hero-role .sep { color: var(--border-strong); margin-inline: 4px; }

.hero-bio {
  max-width: 62ch;
  font-size: clamp(1.02rem, 2.2vw, 1.16rem);
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 11px;
  border: 1px solid transparent;
  font-size: .93rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform .18s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
}
.btn svg { width: 17px; height: 17px; }
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { border-color: var(--border-strong); background: var(--bg-alt); }

.socials { display: flex; gap: 10px; }
.socials a {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: clamp(64px, 10vh, 104px) 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }

.section-head { margin-bottom: 52px; }
.section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--accent);
  letter-spacing: .12em;
  margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(1.75rem, 4.4vw, 2.4rem); letter-spacing: -0.032em; }
.section-sub {
  margin-top: 12px;
  max-width: 56ch;
  color: var(--text-muted);
  font-size: 1rem;
}

/* ---------- Timeline / jobs ---------- */
.timeline { display: flex; flex-direction: column; }

.job {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 40px;
  padding: 34px 0;
  border-top: 1px solid var(--border);
}
.job:first-child { border-top: none; padding-top: 0; }

.job-meta { display: flex; flex-direction: column; gap: 5px; padding-top: 3px; }
.job-date {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text);
  font-weight: 500;
}
.job-loc { font-size: .8rem; color: var(--text-muted); }

.job-company { font-size: 1.35rem; letter-spacing: -0.025em; }
.job-role {
  margin-top: 3px;
  font-size: .93rem;
  color: var(--accent);
  font-weight: 500;
}

.job-points { margin-top: 16px; display: flex; flex-direction: column; gap: 11px; }
.job-points li {
  position: relative;
  padding-left: 20px;
  color: var(--text-mid);
  font-size: .96rem;
  line-height: 1.68;
}
.job-points li::before {
  content: '';
  position: absolute;
  left: 2px; top: .68em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .55;
}

.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.tags li {
  padding: 4px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.tags-lg li { padding: 7px 14px; font-size: .8rem; border-radius: 9px; }

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.project {
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.project-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.project-link {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text-muted);
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.project-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translate(1px, -1px);
}

.project h3 { font-size: 1.22rem; letter-spacing: -0.025em; text-wrap: balance; }
/* An odd card left alone on the last row spans the full width. */
.project:last-child:nth-child(odd) { grid-column: 1 / -1; }
.project-desc {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: .95rem;
  line-height: 1.7;
}
.project .tags { margin-top: auto; padding-top: 20px; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.skill-group {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.skill-group h3 {
  font-size: .82rem;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.skill-group .tags { margin-top: 0; }
.skill-group .tags li { background: var(--bg-alt); color: var(--text-mid); }

/* ---------- Education ---------- */
.edu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.edu-main h3 { font-size: 1.2rem; letter-spacing: -0.025em; }
.edu-main p { margin-top: 5px; color: var(--text-muted); font-size: .95rem; }
.edu-side { display: flex; flex-direction: column; gap: 5px; text-align: right; }
.edu-date { font-family: var(--font-mono); font-size: .8rem; color: var(--text-muted); }
.edu-cgpa { font-size: .95rem; color: var(--text-mid); }
.edu-cgpa strong { color: var(--accent); }

/* ---------- Contact ---------- */
.contact-inner { max-width: 62ch; }
.contact-inner h2 {
  font-size: clamp(1.9rem, 5vw, 2.7rem);
  letter-spacing: -0.035em;
  margin-bottom: 14px;
}
.contact-inner p {
  color: var(--text-mid);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 30px;
}
.contact-inner .hero-actions { margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  background: var(--bg-alt);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: .85rem;
  color: var(--text-muted);
}

/* ============================================================
   Reveal on scroll
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .hero-grid     { grid-template-columns: 1fr; gap: 40px; }
  .hero-portrait { order: -1; justify-self: start; }
  .portrait      { width: 172px; }
  .hero-portrait::before { width: 172px; }
  .skills-grid   { grid-template-columns: 1fr; }
  .project-grid  { grid-template-columns: 1fr; }
  .job           { grid-template-columns: 1fr; gap: 14px; }
  .job-meta      { flex-direction: row; align-items: center; gap: 10px; }
  .job-meta::after { content: none; }
  .job-loc::before { content: '· '; color: var(--border-strong); }
}

@media (max-width: 640px) {
  .wrap { padding-inline: 20px; }
  .nav  { display: none; }
  .hero { padding-top: 56px; }
  .stat-label { max-width: none; }
  .edu { flex-direction: column; align-items: flex-start; }
  .edu-side { text-align: left; }
  .btn { flex: 1 1 auto; justify-content: center; }
}

/* ============================================================
   Motion / print
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .theme-toggle, .socials, .hero::before { display: none; }
  body { background: #fff; color: #000; }
  .section, .hero { padding: 18px 0; page-break-inside: avoid; }
}