/* ============================================================
   Anshuman Behera — Portfolio
   Modern dark-first design system
   ============================================================ */

:root {
  --bg: #0a0e1a;
  --bg-soft: #0f1526;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #e8ecf4;
  --text-soft: #9aa5bd;
  --accent-1: #6366f1;
  --accent-2: #22d3ee;
  --accent-3: #a855f7;
  --gradient: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  --gradient-warm: linear-gradient(120deg, var(--accent-3), var(--accent-1));
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --font-display: "Sora", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

html[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-soft: #eef1f8;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.22);
  --text: #101728;
  --text-soft: #51607a;
  --shadow: 0 20px 45px rgba(30, 41, 80, 0.12);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

::selection { background: var(--accent-1); color: #fff; }

img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { width: min(1140px, 92%); margin: 0 auto; }

/* ---------- decorative glows ---------- */
.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
}
.glow-1 { width: 480px; height: 480px; background: var(--accent-1); top: -120px; left: -120px; }
.glow-2 { width: 420px; height: 420px; background: var(--accent-2); bottom: -140px; right: -100px; }
html[data-theme="light"] .glow { opacity: 0.12; }

/* ---------- scroll progress ---------- */
#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--gradient); z-index: 1001;
}

/* ============================================================
   Navigation
   ============================================================ */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 18px 0;
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}
#navbar.scrolled {
  padding: 10px 0;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }

.logo {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem;
}
.logo span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: 10px; font-size: 0.92rem; font-weight: 500;
  color: var(--text-soft); transition: color 0.25s, background 0.25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); background: var(--bg-card-hover); }

.nav-actions { display: flex; align-items: center; gap: 10px; }

#theme-toggle, #nav-burger {
  width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-card);
  color: var(--text); font-size: 1.15rem; display: grid; place-items: center;
  transition: border-color 0.25s, transform 0.25s;
}
#theme-toggle:hover, #nav-burger:hover { border-color: var(--border-strong); transform: translateY(-2px); }
#nav-burger { display: none; }

@media (max-width: 860px) {
  #nav-burger { display: grid; }
  .nav-links {
    position: fixed; top: 64px; right: 4%; flex-direction: column; align-items: stretch;
    background: var(--bg-soft); border: 1px solid var(--border); border-radius: 16px;
    padding: 12px; min-width: 220px; box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-12px);
    transition: 0.3s ease;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: translateY(0); }
}

/* ============================================================
   Hero
   ============================================================ */
#hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 130px 0 80px;
  overflow: hidden;
}
#particles { position: absolute; inset: 0; z-index: 0; }

.hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center;
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.85rem;
  border: 1px solid var(--border); border-radius: 100px;
  padding: 7px 16px; color: var(--text-soft); background: var(--bg-card);
  margin-bottom: 22px;
}
.hero-eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%; background: #34d399;
  box-shadow: 0 0 10px #34d399; animation: pulse 1.8s infinite;
}
@keyframes pulse { 50% { opacity: 0.4; } }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  font-weight: 700; line-height: 1.12; letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero-title .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero-typed {
  font-family: var(--font-mono); font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  color: var(--accent-2); min-height: 2.2em; margin-bottom: 18px;
}
.hero-typed .cursor { animation: blink 0.85s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-sub { color: var(--text-soft); max-width: 540px; margin-bottom: 32px; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 14px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.btn:hover { transform: translateY(-3px); }
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 10px 30px rgba(99, 102, 241, 0.35); }
.btn-primary:hover { box-shadow: 0 16px 40px rgba(99, 102, 241, 0.5); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: var(--bg-card); }
.btn-ghost:hover { border-color: var(--accent-2); }

.hero-socials { display: flex; gap: 12px; }
.hero-socials a, .contact-socials a {
  width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center;
  border: 1px solid var(--border); background: var(--bg-card);
  color: var(--text-soft); font-size: 1.3rem;
  transition: 0.25s;
}
.hero-socials a:hover, .contact-socials a:hover {
  color: #fff; background: var(--gradient); border-color: transparent;
  transform: translateY(-4px); box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

/* code card */
.code-card {
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  animation: float 7s ease-in-out infinite;
}
@keyframes float { 50% { transform: translateY(-12px); } }

.code-card-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 13px 18px; border-bottom: 1px solid var(--border);
}
.code-card-bar i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.code-card-bar i:nth-child(1) { background: #ff5f57; }
.code-card-bar i:nth-child(2) { background: #febc2e; }
.code-card-bar i:nth-child(3) { background: #28c840; }
.code-card-bar span { margin-left: 10px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-soft); }

.code-card pre {
  padding: 20px 22px; font-family: var(--font-mono);
  font-size: 0.8rem; line-height: 1.75; overflow-x: auto;
}
.tok-kw { color: #c084fc; }
.tok-cl { color: #38bdf8; }
.tok-st { color: #86efac; }
.tok-fn { color: #fbbf24; }
.tok-cm { color: #64748b; }
html[data-theme="light"] .tok-kw { color: #9333ea; }
html[data-theme="light"] .tok-cl { color: #0284c7; }
html[data-theme="light"] .tok-st { color: #15803d; }
html[data-theme="light"] .tok-fn { color: #b45309; }

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  color: var(--text-soft); font-size: 1.6rem; animation: bob 2s infinite; z-index: 1;
}
@keyframes bob { 50% { transform: translate(-50%, 8px); } }

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .code-card { display: none; }
}

/* ============================================================
   Sections (shared)
   ============================================================ */
section { position: relative; padding: 96px 0; z-index: 1; }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head .kicker {
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent-2);
}
.section-head h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -0.02em; margin-top: 8px;
}
.section-head .underline {
  width: 70px; height: 4px; border-radius: 4px; background: var(--gradient);
  margin: 18px auto 0;
}

/* scroll-reveal */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .code-card, .scroll-hint, .hero-eyebrow .dot { animation: none; }
}

/* ============================================================
   About
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 48px; align-items: center; }

/* profile photo */
.profile-wrap { position: relative; display: flex; justify-content: center; padding-bottom: 18px; }
.profile-frame {
  position: relative; max-width: 330px; width: 100%;
  padding: 5px; border-radius: 26px;
  background: var(--gradient);
  box-shadow: 0 24px 60px rgba(99, 102, 241, 0.35);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.profile-frame:hover { transform: translateY(-8px) rotate(-1.5deg); box-shadow: 0 32px 70px rgba(99, 102, 241, 0.5); }
.profile-frame img {
  display: block; width: 100%; aspect-ratio: 4 / 5;
  object-fit: cover; object-position: top;
  border-radius: 22px;
}
.profile-badge {
  position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%);
  white-space: nowrap; font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600;
  padding: 9px 20px; border-radius: 100px;
  background: color-mix(in srgb, var(--bg-soft) 85%, transparent);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.about-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow);
}
.about-card h3 { font-family: var(--font-display); font-size: 1.35rem; margin-bottom: 14px; }
.about-card p { color: var(--text-soft); margin-bottom: 14px; }
.about-card p strong { color: var(--text); }

.fact-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.chip {
  font-family: var(--font-mono); font-size: 0.8rem;
  border: 1px solid var(--border-strong); border-radius: 100px;
  padding: 7px 15px; color: var(--text-soft); background: var(--bg-card);
  transition: 0.25s;
}
.chip:hover { color: var(--text); border-color: var(--accent-2); transform: translateY(-2px); }

.about-points { display: grid; gap: 16px; }
.point {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 18px 20px; transition: 0.3s;
}
.point:hover { background: var(--bg-card-hover); border-color: var(--border-strong); transform: translateX(6px); }
.point .ico {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; font-size: 1.25rem;
  background: var(--gradient); color: #fff;
}
.point h4 { font-size: 1rem; margin-bottom: 3px; }
.point p { font-size: 0.88rem; color: var(--text-soft); }

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

/* ============================================================
   Experience timeline
   ============================================================ */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 36px; }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--accent-1), var(--accent-2));
  border-radius: 2px;
}
.tl-item { position: relative; margin-bottom: 30px; }
.tl-item::before {
  content: ""; position: absolute; left: -34px; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent-2);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent-2) 18%, transparent);
}
.tl-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 26px; cursor: pointer; transition: 0.3s;
}
.tl-card:hover { background: var(--bg-card-hover); border-color: var(--border-strong); }
.tl-meta {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-2);
  margin-bottom: 6px; display: inline-block;
  background: color-mix(in srgb, var(--accent-2) 12%, transparent);
  padding: 3px 12px; border-radius: 100px;
}
.tl-card h3 { font-family: var(--font-display); font-size: 1.15rem; }
.tl-card .org { color: var(--text-soft); font-size: 0.92rem; margin-bottom: 6px; }
.tl-more { display: none; margin-top: 14px; }
.tl-card.open .tl-more { display: block; animation: fadeDown 0.4s ease; }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-8px); } }
.tl-more li {
  position: relative; padding-left: 22px; color: var(--text-soft);
  font-size: 0.92rem; margin-bottom: 7px;
}
.tl-more li::before { content: "▹"; position: absolute; left: 0; color: var(--accent-2); }
.tl-toggle-hint { font-size: 0.78rem; color: var(--text-soft); margin-top: 10px; font-family: var(--font-mono); }

/* ============================================================
   Skills
   ============================================================ */
.skill-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 42px; }
.skill-tab {
  padding: 10px 22px; border-radius: 100px; font-weight: 600; font-size: 0.9rem;
  border: 1px solid var(--border-strong); background: var(--bg-card); color: var(--text-soft);
  transition: 0.25s;
}
.skill-tab:hover { color: var(--text); transform: translateY(-2px); }
.skill-tab.active { background: var(--gradient); color: #fff; border-color: transparent; box-shadow: 0 8px 22px rgba(99, 102, 241, 0.35); }

.skill-panel { display: none; }
.skill-panel.active { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; animation: fadeDown 0.45s ease; }

.skill-card {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 12px; text-align: center;
  transition: 0.3s;
}
.skill-card:hover {
  transform: translateY(-6px); background: var(--bg-card-hover);
  border-color: var(--accent-1); box-shadow: 0 14px 32px rgba(99, 102, 241, 0.22);
}
.skill-card img { width: 46px; height: 46px; object-fit: contain; }
.skill-card .emoji { font-size: 2.2rem; line-height: 46px; }
.skill-card span { font-size: 0.86rem; font-weight: 600; }
html:not([data-theme="light"]) .skill-card img.inv { filter: invert(0.92) hue-rotate(180deg); }

/* ============================================================
   Projects
   ============================================================ */
.project-filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 44px; }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 26px; }

.project-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease, opacity 0.3s, scale 0.3s;
}
.project-card:hover { transform: translateY(-8px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.project-card.hide { display: none; }

.project-card.featured { border: 1px solid transparent; background:
  linear-gradient(var(--bg-soft), var(--bg-soft)) padding-box,
  var(--gradient) border-box;
}
.featured-tag {
  position: absolute; top: 18px; right: -38px; transform: rotate(40deg);
  background: var(--gradient); color: #fff;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 44px;
}

.project-icon { font-size: 2.1rem; margin-bottom: 14px; }
.project-card h3 { font-family: var(--font-display); font-size: 1.25rem; margin-bottom: 10px; }
.project-card > p { color: var(--text-soft); font-size: 0.93rem; flex: 1; margin-bottom: 18px; }
.project-card .highlight { color: var(--accent-2); font-weight: 600; }

.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tech-tags span {
  font-family: var(--font-mono); font-size: 0.72rem;
  background: color-mix(in srgb, var(--accent-1) 14%, transparent);
  color: var(--accent-2); border-radius: 7px; padding: 4px 10px;
}

.project-links { display: flex; gap: 12px; }
.project-links a {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.86rem; font-weight: 600; color: var(--text-soft); transition: color 0.25s;
}
.project-links a:hover { color: var(--accent-2); }

/* ============================================================
   Stats
   ============================================================ */
#stats { padding: 70px 0; }
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 44px 30px; box-shadow: var(--shadow);
}
.stat { text-align: center; }
.stat .num {
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.9rem, 4vw, 2.7rem);
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .label { color: var(--text-soft); font-size: 0.9rem; margin-top: 4px; }
@media (max-width: 720px) { .stats-band { grid-template-columns: repeat(2, 1fr); gap: 32px 12px; } }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-bottom: 44px; }
.contact-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px; text-align: center; transition: 0.3s;
}
.contact-card:hover { transform: translateY(-6px); border-color: var(--accent-1); box-shadow: var(--shadow); }
.contact-card .ico {
  width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 15px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--gradient); color: #fff;
}
.contact-card h4 { font-size: 1rem; margin-bottom: 4px; }
.contact-card a, .contact-card p { color: var(--text-soft); font-size: 0.9rem; transition: color 0.25s; }
.contact-card a:hover { color: var(--accent-2); }

.contact-socials { display: flex; justify-content: center; gap: 14px; }

/* ============================================================
   Footer
   ============================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 34px 0; text-align: center; color: var(--text-soft); font-size: 0.88rem;
  position: relative; z-index: 1;
}
footer .heart { color: #f43f5e; }
footer .mono { font-family: var(--font-mono); font-size: 0.78rem; margin-top: 6px; }

/* back to top */
#to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 999;
  width: 46px; height: 46px; border-radius: 14px; border: none;
  background: var(--gradient); color: #fff; font-size: 1.25rem;
  display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: 0.3s; box-shadow: 0 10px 26px rgba(99, 102, 241, 0.4);
}
#to-top.show { opacity: 1; visibility: visible; transform: none; }
#to-top:hover { transform: translateY(-4px); }