@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&family=Dancing+Script:wght@700&display=swap');

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  --bg:        #0b0d17;
  --bg2:       #0f1120;
  --surface:   #131628;
  --card:      #181c30;
  --card-hov:  #1e2438;
  --border:    #212840;
  --border2:   #2d3660;

  --accent:    #4f8ef7;
  --accent2:   #7c3aed;
  --red:       #dc2626;
  --grad:      linear-gradient(135deg, #4f8ef7 0%, #7c3aed 100%);

  --green:     #10b981;
  --amber:     #f59e0b;
  --err:       #f87171;

  --text:      #e8ecf5;
  --text2:     #8a94b2;
  --muted:     #4e5a78;

  --nav-h:     68px;
  --max-w:     1100px;
  --r:         14px;
  --r-sm:      8px;
  --t:         0.25s ease;
  --t-slow:    0.5s ease;
}

/* ── RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Poppins', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  transition: opacity 0.35s ease;
}
body.loaded  { opacity: 1; }
body.exiting { opacity: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── SCROLL PROGRESS ─────────────────────────────────────── */
#progress-bar {
  position: fixed; top: 0; left: 0;
  height: 2px; width: 0%;
  background: var(--grad);
  z-index: 999; transition: width 0.1s linear;
}

/* ── NAV ─────────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h); z-index: 200;
  transition: background 0.35s, box-shadow 0.35s;
}
nav.scrolled {
  background: rgba(11,13,23,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 2rem; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}

/* Logo */
.nav-logo { display: flex; align-items: center; gap: 0.6rem; }
.nav-logo-img {
  height: 38px; width: auto;
  mix-blend-mode: screen;
  filter: brightness(1.1);
  transition: opacity var(--t);
}
.nav-logo-img:hover { opacity: 0.85; }
.nav-logo-script {
  font-family: 'Dancing Script', cursive;
  font-size: 1.75rem; font-weight: 700;
  color: var(--red);
  line-height: 1;
  transition: opacity var(--t);
}
.nav-logo-script:hover { opacity: 0.85; }

/* Links */
.nav-links { display: flex; align-items: center; gap: 0.2rem; list-style: none; }
.nav-links a {
  padding: 0.45rem 0.95rem; border-radius: var(--r-sm);
  font-size: 0.875rem; font-weight: 500; color: var(--text2);
  transition: color var(--t), background var(--t);
}
.nav-links a:hover  { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-links a.active { color: var(--accent); background: rgba(79,142,247,0.08); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; background: none; border: none; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text2); border-radius: 2px; transition: var(--t);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: rgba(11,13,23,0.97); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem 1.25rem; z-index: 199;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 0.8rem 0.25rem;
  font-size: 0.925rem; font-weight: 500; color: var(--text2);
  border-bottom: 1px solid var(--border);
  transition: color var(--t);
}
.mobile-menu a:last-child { border: none; }
.mobile-menu a:hover, .mobile-menu a.active { color: var(--accent); }

/* ── LAYOUT ──────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
section { padding: 5.5rem 0; }

/* Section header — centered, with animated underline */
.section-head {
  text-align: center;
  margin-bottom: 3rem;
}
.section-head .label {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 3px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 0.5rem;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700; letter-spacing: -0.3px;
  position: relative; display: inline-block;
}
.section-head h2::after {
  content: '';
  display: block;
  width: 0; height: 3px;
  background: var(--grad);
  border-radius: 99px;
  margin: 0.5rem auto 0;
  transition: width 0.8s ease;
}
.section-head h2.underline::after { width: 64px; }

/* Page hero header */
.page-hero {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 3.5rem;
  text-align: center;
}
.page-hero .label {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 3px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 0.6rem;
}
.page-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700; letter-spacing: -0.5px;
}
.page-hero p { color: var(--text2); margin-top: 0.75rem; max-width: 460px; margin-left: auto; margin-right: auto; }
hr.div { border: none; border-top: 1px solid var(--border); margin: 0; }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.6rem; border-radius: 99px;
  font-size: 0.875rem; font-weight: 600; cursor: pointer;
  border: none; transition: all var(--t); font-family: inherit;
}
.btn-primary {
  background: var(--grad); color: #fff;
  box-shadow: 0 4px 22px rgba(79,142,247,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 36px rgba(79,142,247,0.45); }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border2); color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(79,142,247,0.06); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none !important; }

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r);
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.card:hover {
  border-color: rgba(79,142,247,0.35);
  box-shadow: 0 10px 40px rgba(79,142,247,0.1);
  transform: translateY(-3px);
}

/* ── CHIPS ───────────────────────────────────────────────── */
.chip {
  display: inline-block;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text2); border-radius: var(--r-sm);
  padding: 0.25rem 0.65rem; font-size: 0.75rem; font-weight: 500;
  transition: border-color var(--t), color var(--t);
}
.chip:hover { border-color: rgba(79,142,247,0.4); color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ── BADGES ──────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  border-radius: 999px; padding: 0.3rem 0.85rem;
  font-size: 0.74rem; font-weight: 600;
}
.badge-blue  { background: rgba(79,142,247,0.1); border: 1px solid rgba(79,142,247,0.25); color: var(--accent); }
.badge-green { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.25); color: var(--green); }

/* ── GRADIENT TEXT ───────────────────────────────────────── */
.grad-text {
  background: var(--grad); background-size: 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  animation: gradShift 5s ease infinite;
}

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 8% 55%,  rgba(79,142,247,0.09) 0%, transparent 55%),
    radial-gradient(ellipse at 88% 20%, rgba(124,58,237,0.09) 0%, transparent 55%);
}
/* Subtle grid overlay */
.hero::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.15;
}
.hero-content { position: relative; z-index: 1; max-width: 660px; }

/* Slogan */
.hero-slogan {
  display: flex; align-items: center; gap: 0;
  margin-bottom: 1.25rem; flex-wrap: wrap;
}
.hero-slogan-word {
  font-size: 0.85rem; font-weight: 600;
  color: var(--accent); letter-spacing: 0.5px;
}
.hero-slogan-dot {
  margin: 0 0.55rem;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent2); display: inline-block;
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 800;
  line-height: 1.05; letter-spacing: -1.5px; margin-bottom: 1.25rem;
}
.hero-sub {
  font-size: 1rem; color: var(--text2);
  max-width: 500px; margin-bottom: 1.75rem; line-height: 1.85;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.scroll-hint {
  position: absolute; bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: var(--muted); font-size: 0.7rem; letter-spacing: 1.5px;
  text-transform: uppercase;
  animation: scrollBounce 2.5s ease infinite;
}
.scroll-hint-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--muted), transparent);
}

/* ── ABOUT ───────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem; align-items: start; }
.about-text { color: var(--text2); line-height: 1.9; font-size: 0.975rem; }
.about-text p + p { margin-top: 1rem; }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat-card { padding: 1.4rem 1.25rem; }
.stat-num { font-size: 2.4rem; font-weight: 800; line-height: 1; }
.stat-label { font-size: 0.78rem; color: var(--text2); margin-top: 0.35rem; }

/* ── SKILL BARS ──────────────────────────────────────────── */
.skill-bars { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem 2.5rem; }
.skill-bar-item { }
.skill-bar-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.4rem; font-size: 0.82rem; font-weight: 500;
}
.skill-bar-pct { color: var(--accent); font-weight: 600; font-size: 0.78rem; }
.skill-bar-track {
  height: 5px; background: var(--border2);
  border-radius: 99px; overflow: hidden;
}
.skill-bar-fill {
  height: 100%; width: 0; border-radius: 99px;
  background: var(--grad);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── SKILLS GRID ─────────────────────────────────────────── */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.skill-group { padding: 1.25rem; }
.skill-group-title {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.85rem;
}

/* ── TIMELINE ────────────────────────────────────────────── */
.timeline { position: relative; padding-left: 2.75rem; }
.timeline::before {
  content: ''; position: absolute;
  left: 8px; top: 14px; bottom: 14px; width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border2), transparent);
}
.tl-item { position: relative; margin-bottom: 1.75rem; }
.tl-dot {
  position: absolute; left: -2.75rem; top: 17px;
  width: 17px; height: 17px; border-radius: 50%;
  background: var(--card); border: 2px solid var(--border2);
  transition: border-color var(--t);
}
.tl-dot.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,142,247,0.15);
  animation: ringPulse 2.2s infinite;
}
.tl-card { padding: 1.35rem 1.5rem; }
.tl-title   { font-weight: 700; font-size: 1rem; margin-bottom: 0.2rem; }
.tl-company { color: var(--accent); font-size: 0.875rem; font-weight: 600; }
.tl-meta    { color: var(--muted); font-size: 0.8rem; margin-top: 0.2rem; }
.tl-desc    { color: var(--text2); font-size: 0.875rem; margin-top: 0.65rem; line-height: 1.75; }

/* ── PROJECTS ────────────────────────────────────────────── */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 1.25rem; }
.project-card { padding: 1.6rem; display: flex; flex-direction: column; gap: 0.75rem; color: inherit; }
.project-top  { display: flex; justify-content: space-between; align-items: flex-start; }
.project-icon { font-size: 1.8rem; }
.project-stars { display: flex; align-items: center; gap: 0.3rem; color: var(--muted); font-size: 0.8rem; }
.project-name  { font-weight: 700; font-size: 1rem; }
.project-desc  { color: var(--text2); font-size: 0.875rem; flex: 1; line-height: 1.7; }
.project-lang  { display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; color: var(--muted); }
.lang-dot      { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.lang-python   { background: #f59e0b; }
.lang-js       { background: #eab308; }

/* ── EDUCATION ───────────────────────────────────────────── */
.edu-grid { display: grid; gap: 1rem; }
.edu-card { padding: 1.5rem; display: flex; gap: 1.25rem; align-items: flex-start; }
.edu-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: var(--grad); display: flex; align-items: center;
  justify-content: center; font-size: 1.3rem; flex-shrink: 0;
}
.edu-degree  { font-weight: 700; font-size: 0.975rem; }
.edu-school  { color: var(--accent); font-size: 0.875rem; font-weight: 600; margin-top: 0.15rem; }
.edu-period  { color: var(--muted); font-size: 0.8rem; margin-top: 0.2rem; }

/* ── CERTS ───────────────────────────────────────────────── */
.certs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.cert-card  { padding: 1.1rem 1.25rem; display: flex; align-items: center; gap: 1rem; }
.cert-icon  { font-size: 1.6rem; flex-shrink: 0; }
.cert-name   { font-size: 0.875rem; font-weight: 600; }
.cert-issuer { font-size: 0.78rem; color: var(--muted); margin-top: 0.1rem; }

/* ── AWARDS ──────────────────────────────────────────────── */
.awards-list { display: grid; gap: 0.75rem; }
.award-item  { padding: 1rem 1.25rem; display: flex; align-items: flex-start; gap: 1rem; }
.award-emoji { font-size: 1.5rem; flex-shrink: 0; }
.award-title { font-weight: 600; font-size: 0.9rem; }
.award-sub   { font-size: 0.8rem; color: var(--muted); margin-top: 0.15rem; }

/* ── VOLUNTEERING ────────────────────────────────────────── */
.vol-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }
.vol-card   { padding: 1.25rem; }
.vol-role   { font-weight: 700; font-size: 0.95rem; }
.vol-org    { color: var(--accent2); font-size: 0.85rem; font-weight: 600; margin-top: 0.1rem; }
.vol-period { color: var(--muted); font-size: 0.78rem; margin-top: 0.3rem; }
.vol-desc   { color: var(--text2); font-size: 0.82rem; margin-top: 0.5rem; line-height: 1.65; }

/* ── CONTACT ─────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 3rem; align-items: start; }
.contact-info h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
.contact-info p  { color: var(--text2); line-height: 1.8; margin-bottom: 1.75rem; font-size: 0.95rem; }
.contact-links   { display: flex; flex-direction: column; gap: 0.65rem; }
.contact-link {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.9rem 1.1rem; border-radius: var(--r-sm);
  background: var(--card); border: 1px solid var(--border);
  font-size: 0.875rem; font-weight: 500; color: var(--text);
  transition: border-color var(--t), color var(--t);
}
.contact-link:hover { border-color: var(--accent); color: var(--accent); }
.contact-link-icon { font-size: 1.1rem; width: 20px; text-align: center; }

/* ── FORM ────────────────────────────────────────────────── */
.form-card   { padding: 2.25rem; }
.form-title  { font-size: 1.15rem; font-weight: 700; margin-bottom: 1.5rem; }
.form-group  { margin-bottom: 1.2rem; }
.form-row    { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.2rem; }
.form-label  { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text2); margin-bottom: 0.45rem; }
.form-control {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: 0.78rem 1rem;
  color: var(--text); font-size: 0.9rem; font-family: inherit;
  outline: none; transition: border-color var(--t), box-shadow var(--t);
}
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,142,247,0.12); }
.form-control::placeholder { color: var(--muted); }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-control.invalid { border-color: var(--err); }
.form-control.invalid:focus { box-shadow: 0 0 0 3px rgba(248,113,113,0.12); }
.form-error { font-size: 0.76rem; color: var(--err); margin-top: 0.35rem; display: none; }
.form-error.show { display: block; }
.f-honey { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }

/* ── SPINNER ─────────────────────────────────────────────── */
.spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff; display: inline-block;
  animation: spin 0.65s linear infinite;
}

/* ── TOAST ───────────────────────────────────────────────── */
#toast {
  position: fixed; bottom: 2rem; right: 2rem;
  padding: 0.9rem 1.4rem; border-radius: var(--r-sm);
  font-size: 0.875rem; font-weight: 600; z-index: 999;
  display: flex; align-items: center; gap: 0.5rem;
  transform: translateY(80px); opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
  pointer-events: none;
}
#toast.show    { transform: translateY(0); opacity: 1; }
#toast.success { background: rgba(16,185,129,0.14); border: 1px solid rgba(16,185,129,0.3); color: var(--green); }
#toast.error   { background: rgba(248,113,113,0.12); border: 1px solid rgba(248,113,113,0.28); color: var(--err); }

/* ── BACK TO TOP ─────────────────────────────────────────── */
#btt {
  position: fixed; bottom: 2rem; right: 2rem;
  width: 42px; height: 42px; border-radius: 999px;
  background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1rem; border: none;
  opacity: 0; transform: translateY(10px);
  transition: all var(--t); z-index: 50;
  box-shadow: 0 4px 18px rgba(79,142,247,0.35);
}
#btt.show { opacity: 1; transform: translateY(0); }
#btt:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,247,0.5); }

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem; text-align: center;
  color: var(--muted); font-size: 0.82rem;
}
footer a { color: var(--accent); transition: opacity var(--t); }
footer a:hover { opacity: 0.75; }

/* ── SCROLL REVEAL ───────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ── KEYFRAMES ───────────────────────────────────────────── */
@keyframes gradShift {
  0%,100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}
@keyframes pulseDot {
  0%,100% { box-shadow: 0 0 0 0   rgba(16,185,129,0.5); }
  50%     { box-shadow: 0 0 0 6px rgba(16,185,129,0);   }
}
@keyframes ringPulse {
  0%   { box-shadow: 0 0 0 0   rgba(79,142,247,0.45); }
  70%  { box-shadow: 0 0 0 9px rgba(79,142,247,0);    }
  100% { box-shadow: 0 0 0 0   rgba(79,142,247,0);    }
}
@keyframes scrollBounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%     { transform: translateX(-50%) translateY(7px); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 820px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .skill-bars { grid-template-columns: 1fr; }
  section { padding: 3.5rem 0; }
}
@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .vol-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}