/* ==========================================================================
   Shazab Tariq — Portfolio
   1.  Design tokens & themes
   2.  Base & reset
   3.  Layout primitives
   4.  Buttons, tags, chips
   5.  Header & navigation
   6.  Hero
   7.  About
   8.  Timeline (experience & education)
   9.  Products
   10. Fintech & blockchain
   11. Skills
   12. DevOps
   13. Projects
   14. Education side panel
   15. Contact
   16. Footer
   17. Animations
   18. Responsive
   ========================================================================== */

/* ============================ 1. TOKENS & THEMES ========================== */
:root {
  /* brand */
  --brand:        #38bdf8;
  --brand-strong: #0ea5e9;
  --brand-2:      #2dd4bf;
  --brand-3:      #818cf8;
  --gradient:     linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);

  /* radii */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* spacing / layout */
  --container: 1200px;
  --header-h: 72px;

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

  /* motion */
  --t-fast: 160ms ease;
  --t-mid: 260ms cubic-bezier(.4, 0, .2, 1);
}

/* ---- Dark (default) ---- */
:root,
[data-theme='dark'] {
  color-scheme: dark;

  --bg:          #0b0f16;
  --bg-alt:      #0e131c;
  --surface:     #121826;
  --surface-2:   #161e2e;
  --surface-hover:#1a2333;

  --text:        #e8edf5;
  --text-muted:  #9aa7bd;
  --text-faint:  #6b7893;

  --border:      rgba(255, 255, 255, .09);
  --border-strong: rgba(255, 255, 255, .16);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, .35);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, .45);

  --glow: radial-gradient(60% 60% at 70% 20%, rgba(56, 189, 248, .16) 0%, transparent 70%),
          radial-gradient(50% 50% at 15% 30%, rgba(129, 140, 248, .12) 0%, transparent 70%);

  --header-bg: rgba(11, 15, 22, .72);
  --chip-bg: rgba(56, 189, 248, .08);
}

/* ---- Light ---- */
[data-theme='light'] {
  color-scheme: light;

  --brand:        #0284c7;
  --brand-strong: #0369a1;
  --brand-2:      #0d9488;
  --brand-3:      #4f46e5;

  --bg:          #ffffff;
  --bg-alt:      #f5f7fb;
  --surface:     #ffffff;
  --surface-2:   #f8fafc;
  --surface-hover:#f1f5f9;

  --text:        #0f172a;
  --text-muted:  #475569;
  --text-faint:  #64748b;

  --border:      rgba(15, 23, 42, .10);
  --border-strong: rgba(15, 23, 42, .18);

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, .12);

  --glow: radial-gradient(60% 60% at 70% 20%, rgba(2, 132, 199, .10) 0%, transparent 70%),
          radial-gradient(50% 50% at 15% 30%, rgba(79, 70, 229, .08) 0%, transparent 70%);

  --header-bg: rgba(255, 255, 255, .82);
  --chip-bg: rgba(2, 132, 199, .07);
}

/* ============================== 2. BASE & RESET =========================== */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -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;
  overflow-x: hidden;
  transition: background-color var(--t-mid), color var(--t-mid);
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 {
  margin: 0 0 .5rem;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -.02em;
}

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--brand);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--brand-strong); }

ul, ol { margin: 0; padding: 0; list-style: none; }

button { font: inherit; color: inherit; cursor: pointer; }

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

::selection { background: var(--brand); color: #04121d; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 2000;
  padding: .6rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  transition: top var(--t-fast);
}
.skip-link:focus { top: 12px; }

/* ========================== 3. LAYOUT PRIMITIVES ========================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 96px; }
.section-alt { background: var(--bg-alt); }

.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-kicker {
  display: inline-block;
  margin-bottom: .75rem;
  padding: .3rem .85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--chip-bg);
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: .75rem;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.bullets li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: .55rem;
  color: var(--text-muted);
  font-size: .94rem;
}
.bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}
.bullets li:last-child { margin-bottom: 0; }

/* ======================= 4. BUTTONS, TAGS, CHIPS ========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-size: .94rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast),
              background-color var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.btn i { font-size: 1.15em; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--gradient);
  color: #04121d;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { color: #04121d; box-shadow: var(--shadow-lg); }

.btn-outline {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--surface-hover);
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text-muted);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--border-strong);
  color: var(--brand);
  background: var(--surface-hover);
}

.btn-block { width: 100%; }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: 1rem;
}

.tag {
  padding: .25rem .65rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.chip {
  padding: .4rem .8rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--chip-bg);
  color: var(--text);
  font-size: .84rem;
  font-weight: 500;
  transition: border-color var(--t-fast), transform var(--t-fast), color var(--t-fast);
}
.chip:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
}

/* ========================== 5. HEADER & NAVIGATION ======================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-mid), box-shadow var(--t-mid), background-color var(--t-mid);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.02em;
}
.logo:hover { color: var(--text); }

.logo-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient);
  color: #04121d;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
}

.logo-text { font-size: 1.02rem; }
.logo-text strong { color: var(--brand); font-weight: 700; }

.nav {
  display: flex;
  align-items: center;
  gap: .2rem;
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: .45rem .7rem;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  transition: color var(--t-fast), background-color var(--t-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient);
  transform: translateX(-50%);
  transition: width var(--t-mid);
}
.nav-link:hover { color: var(--text); background: var(--surface-hover); }
.nav-link.is-active { color: var(--brand); }
.nav-link.is-active::after { width: 55%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-left: .75rem;
}

/* theme switch */
.theme-toggle {
  padding: 0;
  border: 0;
  background: none;
  line-height: 0;
}

.toggle-track {
  position: relative;
  display: block;
  width: 58px;
  height: 30px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  transition: background-color var(--t-mid), border-color var(--t-mid);
}
.theme-toggle:hover .toggle-track { border-color: var(--brand); }

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient);
  color: #04121d;
  font-size: .8rem;
  transition: transform var(--t-mid);
}
[data-theme='light'] .toggle-thumb { transform: translateX(28px); }

.toggle-thumb i { position: absolute; transition: opacity var(--t-fast); }
.icon-sun { opacity: 0; }
[data-theme='light'] .icon-moon { opacity: 0; }
[data-theme='light'] .icon-sun { opacity: 1; }

.menu-btn {
  display: none;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface-2);
  font-size: 1.5rem;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.menu-btn:hover { border-color: var(--brand); color: var(--brand); }

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(0, 0, 0, .5);
  backdrop-filter: blur(2px);
}

/* ================================ 6. HERO ================================= */
.hero {
  position: relative;
  padding-block: calc(var(--header-h) + 72px) 88px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 720px;
  background: var(--glow);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  align-items: center;
  gap: 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1.25rem;
  padding: .35rem .9rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--text-muted);
  font-size: .8rem;
  font-weight: 500;
}

.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-2);
  box-shadow: 0 0 0 0 rgba(45, 212, 191, .6);
  animation: pulse 2.4s infinite;
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -.035em;
  margin-bottom: .35rem;
}

.hero-role {
  margin-bottom: .2rem;
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subrole {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 500;
  text-wrap: balance; /* keeps the two roles from splitting mid-phrase when it wraps */
}
.hero-subrole .sep { color: var(--brand); margin-inline: .35rem; }

.hero-desc {
  max-width: 34rem;
  margin-bottom: 1.75rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.pillars {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-bottom: 2rem;
}
.pillars li {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .9rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  font-size: .88rem;
  font-weight: 600;
}
.pillars i { color: var(--brand); font-size: 1.05rem; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.75rem;
}

.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}
.hero-social a {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 1.3rem;
  transition: transform var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.hero-social a:hover {
  transform: translateY(-3px);
  color: var(--brand);
  border-color: var(--brand);
}

/* hero image */
.hero-visual {
  position: relative;
  justify-self: center;
  width: min(360px, 100%);
}

.avatar-ring {
  position: relative;
  padding: 6px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, var(--brand), var(--brand-3), var(--brand-2), var(--brand));
  box-shadow: var(--shadow-lg);
}
.avatar-ring::after {
  content: '';
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  border: 1px dashed var(--border-strong);
  pointer-events: none;
}
.avatar-ring img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center;
  border-radius: 50%;
  border: 5px solid var(--bg);
}

.float-badge {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem .85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  font-size: .8rem;
  font-weight: 600;
  white-space: nowrap;
}
.float-badge i { color: var(--brand); font-size: 1rem; }
.badge-a { top: 14%; left: -14%; animation: float 6s ease-in-out infinite; }
.badge-b { bottom: 12%; right: -12%; animation: float 6s ease-in-out infinite 3s; }

/* stats */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 72px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--border);
  overflow: hidden;
}
.stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 1.25rem;
  background: var(--surface);
  text-align: center;
}
.stat-num {
  margin: 0 0 .15rem;
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -.03em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-word { font-size: clamp(1.2rem, 2.6vw, 1.6rem); }
.stat dt {
  color: var(--text-faint);
  font-size: .82rem;
  font-weight: 500;
}

/* =============================== 7. ABOUT ================================= */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 40px;
  align-items: start;
}

.about-card {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.about-photo {
  width: 148px;
  margin: 0 auto 1.1rem;
  padding: 4px;
  border-radius: 50%;
  background: var(--gradient);
}
.about-photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--surface);
}

.about-name { font-size: 1.3rem; margin-bottom: .2rem; }
.about-tag {
  margin-bottom: 1.5rem;
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
}

.about-facts { text-align: left; }
.about-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem;
  padding: .7rem 0;
  border-top: 1px solid var(--border);
  font-size: .88rem;
}
.about-facts li > span:first-child,
.about-facts li > a:first-child { color: var(--text-faint); }
.about-facts li > span:last-child { font-weight: 600; text-align: right; }
.about-facts a { word-break: break-word; text-align: right; }

/* grid children must be allowed to shrink or long words force overflow */
.about-body,
.tl-card,
.product-card,
.skill-card,
.devops-card,
.project-card,
.contact-form,
.contact-info { min-width: 0; }

.prose { margin-bottom: 2rem; }
.prose p { color: var(--text-muted); font-size: 1rem; }
.prose strong { color: var(--text); font-weight: 600; }

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.highlight {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.highlight:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.highlight i {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: .9rem;
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.35rem;
}
.highlight h3 { font-size: 1rem; }
.highlight p { color: var(--text-muted); font-size: .88rem; margin: 0; }

/* ============================== 8. TIMELINE =============================== */
.timeline {
  position: relative;
  max-width: 880px;
  margin-inline: auto;
  padding-left: 34px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand), transparent);
}

.tl-item { position: relative; margin-bottom: 24px; }
.tl-item:last-child { margin-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -34px;
  top: 26px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--bg-alt);
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px var(--chip-bg);
}
#education .tl-dot { border-color: var(--bg); }

.tl-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: border-color var(--t-mid), box-shadow var(--t-mid), transform var(--t-mid);
}
.tl-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem 1.25rem;
  margin-bottom: .9rem;
}
.tl-headings { min-width: 0; }
.tl-role { font-size: 1.12rem; margin-bottom: .25rem; }
/* flex-start, not center: when the company/school name wraps to two lines on
   narrow screens, a centred icon drifts down beside the second line. */
.tl-company {
  display: flex;
  align-items: flex-start;
  gap: .4rem;
  margin: 0;
  color: var(--text-muted);
  font-size: .9rem;
}
.tl-company i {
  flex-shrink: 0;
  margin-top: .18em;
  color: var(--brand);
}

.tl-period {
  flex-shrink: 0;
  padding: .3rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  white-space: nowrap;
}
.tl-period.is-current {
  border-color: var(--brand);
  background: var(--chip-bg);
  color: var(--brand);
}

.tl-summary { color: var(--text-muted); font-size: .95rem; margin-bottom: 1rem; }

.tl-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .8rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 600;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.tl-toggle:hover { color: var(--brand); border-color: var(--brand); }
.tl-toggle i { transition: transform var(--t-mid); font-size: 1.1rem; }
.tl-toggle[aria-expanded='true'] i { transform: rotate(180deg); }

.tl-details { padding-top: 1.1rem; }
.tl-details[hidden] { display: none; }

/* ============================== 9. PRODUCTS =============================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  overflow: hidden;
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.product-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--t-mid);
}
.product-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.product-card:hover::before { opacity: 1; }

.product-top {
  display: flex;
  align-items: center;
  gap: .9rem;
  margin-bottom: 1rem;
}
.product-icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.5rem;
}
.product-name { font-size: 1.3rem; margin-bottom: .1rem; }
.product-domain {
  margin: 0;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.product-desc { color: var(--text-muted); font-size: .95rem; margin-bottom: 1.25rem; }

.product-label {
  margin-bottom: .65rem;
  color: var(--text);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.product-card .tag-row { margin-top: auto; padding-top: 1.25rem; }

/* ====================== 10. FINTECH & BLOCKCHAIN ========================== */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.domain-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.domain-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
}
.domain-card i {
  display: block;
  margin-bottom: .75rem;
  color: var(--brand);
  font-size: 1.6rem;
}
.domain-card h3 { font-size: 1.02rem; }
.domain-card p { margin: 0; color: var(--text-muted); font-size: .88rem; }

.chain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 18px;
  margin-bottom: 32px;
}

.chain-card {
  padding: 26px 22px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  text-align: center;
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.chain-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
}
.chain-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto .9rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.7rem;
}
.chain-card h3 { font-size: 1.05rem; }
.chain-card p { margin: 0; color: var(--text-muted); font-size: .86rem; }

.capability-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .7rem;
}
.capability {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--surface);
  font-size: .88rem;
  font-weight: 600;
}
.capability i { color: var(--brand); font-size: 1.05rem; }

/* =============================== 11. SKILLS =============================== */
.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.skill-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.skill-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.skill-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.25rem;
}
.skill-head h3 { margin: 0; font-size: 1.08rem; }
.skill-status {
  margin-left: auto;
  padding: .2rem .6rem;
  border: 1px solid var(--brand-3);
  border-radius: var(--r-pill);
  color: var(--brand-3);
  font-size: .7rem;
  font-weight: 600;
  white-space: nowrap;
}

/* =============================== 12. DEVOPS =============================== */
.pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: .5rem;
  margin-bottom: 40px;
  padding: 28px 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.pipe-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-width: 104px;
  padding: 16px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-2);
  text-align: center;
  transition: transform var(--t-fast), border-color var(--t-fast), background-color var(--t-fast);
}
.pipe-step:hover {
  transform: translateY(-3px);
  border-color: var(--brand);
  background: var(--surface-hover);
}
.pipe-step i { color: var(--brand); font-size: 1.5rem; }
.pipe-step span { font-size: .8rem; font-weight: 600; }
.pipe-step.is-end { border-color: var(--brand); background: var(--chip-bg); }

.pipe-arrow {
  display: grid;
  place-items: center;
  color: var(--text-faint);
  font-size: 1.35rem;
}

.devops-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.devops-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.devops-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.devops-card > i {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.4rem;
}
.devops-card h3 { font-size: 1.08rem; }
.devops-card p { color: var(--text-muted); font-size: .9rem; margin: 0; }

/* ============================== 13. PROJECTS ============================== */
/* Wider columns than the other card grids: these cards carry feature lists,
   and `align-items: start` stops short cards stretching into empty boxes. */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  align-items: start;
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
}
.project-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 1rem;
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.45rem;
}
.project-card h3 { font-size: 1.08rem; }
.project-card p { color: var(--text-muted); font-size: .9rem; }

.project-points {
  margin-bottom: 1rem;
  padding-top: .25rem;
  border-top: 1px solid var(--border);
}
.project-points li {
  position: relative;
  padding: .3rem 0 .3rem 1.15rem;
  color: var(--text-muted);
  font-size: .84rem;
  line-height: 1.5;
}
.project-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .78em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
}

/* Block, not flex, so the trailing icon flows right after the last word
   instead of being pushed to the far edge when a long URL wraps. */
.project-link {
  display: block;
  margin-top: auto;
  padding-top: .75rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.project-link i {
  margin-left: .3rem;
  vertical-align: -2px;
}

/* ========================= 14. EDUCATION SIDE PANEL ======================= */
.edu-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}
.timeline-edu { max-width: none; margin-inline: 0; }

.edu-side { display: grid; gap: 20px; }

.side-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
}
.side-card h3 {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1.1rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.02rem;
}
.side-card h3 i { color: var(--brand); font-size: 1.25rem; }

.cert-name { margin-bottom: .2rem; font-weight: 600; }
.cert-meta { margin: 0; color: var(--text-muted); font-size: .85rem; }

.lang-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .92rem;
  font-weight: 500;
}
.lang-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.lang-level {
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
}

/* =============================== 15. CONTACT ============================== */
.contact-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 32px;
  align-items: start;
}

.contact-info { display: grid; gap: 12px; }

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--text);
  transition: transform var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}
.contact-item:not(.is-static):hover {
  transform: translateX(4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
  color: var(--text);
}

.contact-icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: var(--chip-bg);
  color: var(--brand);
  font-size: 1.3rem;
}
.contact-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  font-size: .92rem;
  word-break: break-word;
}
.contact-text strong {
  color: var(--text-faint);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.contact-form {
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field { margin-bottom: 16px; }
.field label {
  display: block;
  margin-bottom: .4rem;
  color: var(--text-muted);
  font-size: .84rem;
  font-weight: 600;
}
.field input,
.field textarea {
  width: 100%;
  padding: .8rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--bg-alt);
  color: var(--text);
  font-family: inherit;
  font-size: .94rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.field textarea { resize: vertical; min-height: 130px; }
.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--chip-bg);
}
.field input[aria-invalid='true'],
.field textarea[aria-invalid='true'] { border-color: #f87171; }

.form-note {
  margin: 1rem 0 0;
  color: var(--text-faint);
  font-size: .82rem;
  line-height: 1.6;
}
.form-note.is-error { color: #f87171; }
.form-note.is-success { color: var(--brand-2); }

/* =============================== 16. FOOTER =============================== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding-top: 56px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.4fr auto;
  align-items: start;
  gap: 32px;
  padding-bottom: 36px;
}

.footer-brand p {
  margin: .75rem 0 0;
  color: var(--text-muted);
  font-size: .9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
}
.footer-nav a { color: var(--text-muted); font-size: .9rem; }
.footer-nav a:hover { color: var(--brand); }

.footer-social { display: flex; gap: .55rem; }
.footer-social a {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 1.15rem;
  transition: color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.footer-social a:hover {
  color: var(--brand);
  border-color: var(--brand);
  transform: translateY(-2px);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 20px;
  border-top: 1px solid var(--border);
}
.footer-bottom p { margin: 0; color: var(--text-faint); font-size: .85rem; }
.to-top {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 600;
}
.to-top:hover { color: var(--brand); }

/* ============================= 17. ANIMATIONS ============================= */
/* Only hide content when JS can reveal it again — without JS everything shows. */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.4, 0, .2, 1);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(45, 212, 191, .55); }
  70%  { box-shadow: 0 0 0 9px rgba(45, 212, 191, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-9px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

/* ============================= 18. RESPONSIVE ============================= */
@media (max-width: 1180px) {
  .nav-link { padding: .45rem .55rem; font-size: .86rem; }
}

@media (max-width: 1024px) {
  .section { padding-block: 76px; }

  .hero-grid { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-content { display: flex; flex-direction: column; align-items: center; }
  .hero-desc { margin-inline: auto; }
  .pillars, .hero-actions, .hero-social { justify-content: center; }
  .hero-visual { width: min(300px, 78vw); order: -1; }
  .badge-a { left: -8%; }
  .badge-b { right: -6%; }

  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 56px; }

  .about-grid { grid-template-columns: 1fr; }
  .about-card { position: static; max-width: 460px; margin-inline: auto; }

  .edu-layout,
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .menu-btn { display: grid; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    z-index: 950;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
    margin: 0;
    padding: 14px 20px 22px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-mid), transform var(--t-mid), visibility var(--t-mid);
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }

  .nav-link { padding: .75rem 1rem; font-size: .95rem; border-radius: var(--r-md); }
  .nav-link::after { display: none; }
  .nav-link.is-active { background: var(--chip-bg); }

  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }

  .section { padding-block: 64px; }
  .section-head { margin-bottom: 40px; }

  .container, .header-inner { padding-inline: 20px; }

  .float-badge { font-size: .72rem; padding: .4rem .7rem; }

  .timeline { padding-left: 26px; }
  .tl-dot { left: -26px; top: 22px; width: 14px; height: 14px; }
  .timeline::before { left: 6px; }
  .tl-card { padding: 20px; }

  .product-grid,
  .skill-grid,
  .devops-grid,
  .domain-grid,
  .chain-grid,
  .project-grid,
  .highlight-grid { grid-template-columns: 1fr; }

  .pipeline { flex-direction: column; padding: 20px 16px; }
  .pipe-step { width: 100%; flex-direction: row; justify-content: flex-start; gap: .75rem; text-align: left; }
  .pipe-arrow { transform: rotate(90deg); font-size: 1.2rem; }

  .field-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 22px; }
}

@media (max-width: 520px) {
  body { font-size: 15px; }

  .container, .header-inner { padding-inline: 16px; }
  .logo-text { display: none; }

  .hero { padding-block: calc(var(--header-h) + 48px) 64px; }

  /* Turn the "|" separator into a line break so the second role does not
     start with a stray pipe when the line wraps on a phone. */
  .hero-subrole .sep { font-size: 0; margin-inline: 0; }
  .hero-subrole .sep::after { content: '\A'; white-space: pre; }
  .hero-actions { width: 100%; flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-visual { width: min(240px, 68vw); }
  .float-badge { position: static; display: inline-flex; margin-top: .6rem; animation: none; }
  .badge-a, .badge-b { animation: none; }

  .hero-stats { grid-template-columns: 1fr; }
  .stat { padding: 1.15rem 1rem; }

  .about-card { padding: 22px; }
  /* Stacked label/value keeps long values (email) readable; tighten the rhythm
     so six facts do not turn the card into a very tall column. */
  .about-facts li { flex-direction: column; gap: 0; padding: .5rem 0; }
  .about-facts li > span:first-child { font-size: .78rem; }
  .about-facts li > span:last-child,
  .about-facts a { text-align: left; }

  .tl-head { flex-direction: column; }
  .product-card, .skill-card, .devops-card, .project-card, .side-card { padding: 20px; }
  .chip { font-size: .8rem; padding: .35rem .7rem; }

  .contact-item { padding: 14px; gap: .8rem; }
  .footer-bottom { justify-content: center; text-align: center; }
}

@media (max-width: 380px) {
  .hero-social a { width: 38px; height: 38px; font-size: 1.15rem; }
  .capability { font-size: .8rem; padding: .5rem .85rem; }
}