/* ============================================================
   KARAN SHAH PORTFOLIO — style.css
   Design: Editorial dark with teal-gold accent system
   ============================================================ */

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

:root {
  --bg: #0d0f11;
  --bg-alt: #111418;
  --surface: #171c22;
  --surface-2: #1e242d;
  --border: rgba(255,255,255,0.07);
  --border-mid: rgba(255,255,255,0.13);

  --text-primary: #eef0f2;
  --text-secondary: #8a9aad;
  --text-muted: #4a5668;

  --accent: #00c2a8;       /* teal */
  --accent-soft: rgba(0,194,168,0.12);
  --accent-mid: rgba(0,194,168,0.25);
  --gold: #d4a843;
  --gold-soft: rgba(212,168,67,0.12);

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;

  --radius: 8px;
  --radius-lg: 14px;

  --nav-h: 64px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── CONTAINER ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13,15,17,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: border-color 0.3s;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.05em;
  border: 1px solid var(--accent);
  padding: 4px 10px;
  border-radius: 4px;
  transition: background 0.2s;
}
.nav-logo:hover { background: var(--accent-soft); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }

.nav-cta {
  color: var(--accent) !important;
  border: 1px solid var(--accent);
  padding: 6px 16px;
  border-radius: 4px;
  transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--accent-soft) !important; }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* ── MOBILE MENU ── */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  flex-direction: column;
  gap: 1.25rem;
}
.mobile-menu.open { display: flex; }
.mobile-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}
.mobile-link:hover { color: var(--text-primary); }

@media (max-width: 700px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 300px;
  background: linear-gradient(to top, var(--bg), transparent);
}

/* Subtle radial glow */
.hero-bg::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,194,168,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 4rem;
  padding-bottom: 6rem;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-mid);
  background: var(--accent-soft);
  padding: 5px 14px;
  border-radius: 4px;
  margin-bottom: 1.5rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}
.hero-name em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  max-width: 540px;
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s var(--ease-out);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #0d0f11;
}
.btn-primary:hover {
  background: #00dabb;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-mid);
}
.btn-ghost:hover {
  background: var(--surface);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--text-primary);
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border-mid);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  right: 2rem;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5) translateY(-10px); }
  50% { opacity: 1; transform: scaleY(1) translateY(0); }
}

/* ── SECTIONS ── */
.section {
  padding: 7rem 0;
}
.section-alt {
  background: var(--bg-alt);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

/* ── ABOUT ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 15.5px;
  line-height: 1.8;
}
.about-text p:last-child { margin-bottom: 0; }

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.25s, transform 0.25s var(--ease-out);
}
.about-card:hover {
  border-color: var(--border-mid);
  transform: translateY(-3px);
}

.about-card-icon {
  font-size: 20px;
  color: var(--accent);
  margin-bottom: 0.75rem;
  line-height: 1;
}
.about-card h3 {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.about-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 500px) {
  .about-cards { grid-template-columns: 1fr; }
}

/* ── EXPERIENCE ── */
.job {
  margin-bottom: 4rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--border);
}
.job:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.job-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.job-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.job-company {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
}
.job-divider {
  color: var(--text-muted);
}
.job-title {
  font-size: 15px;
  color: var(--text-secondary);
  font-style: italic;
}
.job-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-mid);
  padding: 4px 12px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}

.job-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.03em;
}

.job-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.job-bullets li {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
  padding-left: 1.5rem;
  position: relative;
}
.job-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ── SKILLS ── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.skill-group-title {
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--surface);
  transition: border-color 0.2s, color 0.2s;
}
.pill:hover {
  border-color: var(--border-mid);
  color: var(--text-primary);
}
.pill-primary {
  border-color: var(--accent-mid);
  color: var(--accent);
  background: var(--accent-soft);
}

/* Competency bars */
.competency-strip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.competency-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.competency-label {
  font-size: 13px;
  color: var(--text-secondary);
  width: 220px;
  flex-shrink: 0;
}
.competency-bar {
  flex: 1;
  height: 4px;
  background: var(--surface-2);
  border-radius: 2px;
  overflow: hidden;
}
.competency-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: 2px;
  width: 0;
  transition: width 1.2s var(--ease-out);
}

@media (max-width: 700px) {
  .skills-grid { grid-template-columns: 1fr; }
  .competency-label { width: 150px; font-size: 12px; }
}

/* ── EDUCATION ── */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: border-color 0.25s, transform 0.25s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.edu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
}
.edu-card:hover {
  border-color: var(--border-mid);
  transform: translateY(-4px);
}

.edu-degree {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.edu-field {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 1rem;
}
.edu-school {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}
.edu-location {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.edu-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.edu-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.edu-gpa {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  background: var(--gold-soft);
  padding: 3px 10px;
  border-radius: 4px;
}

@media (max-width: 700px) {
  .edu-grid { grid-template-columns: 1fr; }
}

/* ── CONTACT ── */
.contact-section {
  background: var(--bg);
}
.contact-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 3rem;
  font-weight: 300;
}
.contact-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s, transform 0.25s var(--ease-out), background 0.25s;
}
.contact-card:not(.contact-card-plain):hover {
  border-color: var(--accent-mid);
  background: var(--accent-soft);
  transform: translateY(-3px);
}
.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 500;
  flex-shrink: 0;
}
.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.contact-type {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.contact-value {
  font-size: 14px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-name {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}
.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── REVEAL ANIMATIONS ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* stagger children of hero */
.hero-tag.reveal { transition-delay: 0.1s; }
.hero-name.reveal { transition-delay: 0.2s; }
.hero-sub.reveal  { transition-delay: 0.3s; }
.hero-actions.reveal { transition-delay: 0.4s; }
.hero-stats.reveal { transition-delay: 0.5s; }

/* ── SELECTION ── */
::selection {
  background: var(--accent-mid);
  color: var(--text-primary);
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }