/* =============================================
   SAKHAWAT ALI LARIK — PORTFOLIO STYLESHEET
   sakhawatalilarik.com
============================================= */

/* ── CSS Variables ── */
:root {
  --bg: #0a0a0f;
  --bg-2: #111118;
  --bg-3: #16161f;
  --bg-card: #12121a;
  --accent: #7c6cfc;
  --accent-2: #a78bfa;
  --accent-glow: rgba(124, 108, 252, 0.15);
  --green: #22c55e;
  --text: #e8e8f0;
  --text-muted: #c0c0c0;
  --text-dim: #aaa;
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(124, 108, 252, 0.35);
  --radius: 12px;
  --radius-lg: 15px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --nav-h: 68px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}


/* ── Light Theme Variables ── */
[data-theme="light"] {
  --bg: #f4f4f8;
  --bg-2: #eaeaf0;
  --bg-3: #dfdfe8;
  --bg-card: #ffffff;
  --accent: #6355e8;
  --accent-2: #7c6cfc;
  --accent-glow: rgba(99, 85, 232, 0.12);
  --green: #16a34a;
  --text: #0f0f1a;
  --text-muted: #4a4a60;
  --text-dim: #8a8aa0;
  --border: rgba(0, 0, 0, 0.09);
  --border-hover: rgba(99, 85, 232, 0.35);
  --ds-accent: #0284c7;
  --ds-accent-glow: rgba(2, 132, 199, 1);
}
 
/* Light theme overrides for elements that need explicit colour fixes */
[data-theme="light"] body { background: var(--bg); }
[data-theme="light"] .nav {
  background: rgba(244, 244, 248, 0.92);
  border-bottom-color: var(--border);
}
[data-theme="light"] .nav.scrolled { border-bottom-color: rgba(99, 85, 232, 0.2); }
[data-theme="light"] .drawer { background: #eaeaf0; border-left-color: var(--border); }
[data-theme="light"] .drawer__overlay { background: rgba(0,0,0,0.3); }
[data-theme="light"] .hero__grid-bg {
  background-image:
    linear-gradient(rgba(99,85,232,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,85,232,0.06) 1px, transparent 1px);
}
[data-theme="light"] .hero__code-card {
  background: #ffffff;
  border-color: #d8d8e8;
  box-shadow: 0 4px 32px rgba(0,0,0,0.08);
}
[data-theme="light"] .hero__code-topbar { background: #f0f0f6; border-bottom-color: #d8d8e8; }
[data-theme="light"] .hero__code { background: #ffffff; }
[data-theme="light"] .tech-pill { background: #f0f0f6; border-color: #d0d0dc; color: #4a4a60; }
[data-theme="light"] .skill-category,
[data-theme="light"] .project-card,
[data-theme="light"] .service-card,
[data-theme="light"] .cert-card,
[data-theme="light"] .timeline__card,
[data-theme="light"] .about__info-card,
[data-theme="light"] .about__edu-card,
[data-theme="light"] .contact__form-wrap,
[data-theme="light"] .contact__method {
  background: #ffffff;
  border-color: rgba(0,0,0,0.09);
}
[data-theme="light"] .skill-tag { background: #f0f0f6; border-color: #d0d0dc; color: #4a4a60; }
[data-theme="light"] .skill-tag--primary { background: rgba(99,85,232,0.1); border-color: rgba(99,85,232,0.25); color: var(--accent); }
[data-theme="light"] .skills__practices { background: #eaeaf0; border-color: var(--border); }
[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea,
[data-theme="light"] .form-group select { background: #f4f4f8; border-color: #ccccd8; color: var(--text); }
[data-theme="light"] .form-group input:focus,
[data-theme="light"] .form-group textarea:focus { border-color: var(--accent); }
[data-theme="light"] .about__value { background: #f0f0f6; border-color: var(--border); }
[data-theme="light"] .footer { background: #dfdfe8; border-top-color: var(--border); }
[data-theme="light"] .footer__links a { background: #f0f0f6; border-color: var(--border); }
[data-theme="light"] .timeline__tags span { background: #f0f0f6; border-color: #d0d0dc; }
[data-theme="light"] .project-card__tech span { background: #f0f0f6; border-color: #d0d0dc; }
[data-theme="light"] .ds-kaggle-strip { background: linear-gradient(135deg, rgba(2,132,199,0.07), rgba(2,132,199,0.03)); border-color: rgba(2,132,199,0.2); }
[data-theme="light"] .cert-badge--coursera { background: rgba(0,86,210,1); }
[data-theme="light"] ::-webkit-scrollbar-track { background: var(--bg); }
[data-theme="light"] ::selection { background: var(--accent); color: #fff; }
 
/* ── Global theme transition ── */
*,
*::before,
*::after {
  transition:
    background-color 0.35s ease,
    border-color 0.35s ease,
    color 0.35s ease,
    box-shadow 0.35s ease !important;
}
/* But keep transform/opacity transitions snappy */
.btn, .project-card, .service-card, .cert-card, .contact__method,
.drawer, .drawer__overlay, .nav__burger-bar, .nav__link::after,
.drawer__link, .reveal { transition: unset !important; }
.btn                { transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.25s ease !important; }
.project-card,
.service-card,
.cert-card          { transition: border-color 0.25s ease, transform 0.25s ease !important; }
.contact__method    { transition: border-color 0.25s ease, transform 0.25s ease !important; }
.drawer             { transition: transform 0.38s cubic-bezier(0.4,0,0.2,1) !important; }
.drawer__overlay    { transition: opacity 0.35s ease !important; }
.nav__burger-bar    { transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease !important; }
.nav__link::after   { transition: width 0.25s cubic-bezier(0.4,0,0.2,1) !important; }
.reveal             { transition: opacity 0.7s ease, transform 0.7s ease !important; }
 
/* ══════════════════════════════
   THEME TOGGLE BUTTON
══════════════════════════════ */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.theme-toggle__track {
  display: flex;
  align-items: center;
  width: 52px;
  height: 28px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 3px;
  transition: background 0.35s ease, border-color 0.35s ease !important;
  position: relative;
}
[data-theme="light"] .theme-toggle__track {
  background: #e2e2ec;
  border-color: #c8c8d8;
}
.theme-toggle__thumb {
  width: 20px;
  height: 20px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(0);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1), background 0.35s ease !important;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
[data-theme="light"] .theme-toggle__thumb {
  transform: translateX(24px);
}
.theme-toggle__icon { color: #fff; display: block; }
/* show moon in dark mode, sun in light mode */
.theme-toggle__icon--sun  { display: none; }
.theme-toggle__icon--moon { display: block; }
[data-theme="light"] .theme-toggle__icon--sun  { display: block; }
[data-theme="light"] .theme-toggle__icon--moon { display: none; }
 
.theme-toggle--sm .theme-toggle__track { width: 44px; height: 24px; padding: 2px; }
.theme-toggle--sm .theme-toggle__thumb { width: 18px; height: 18px; }
[data-theme="light"] .theme-toggle--sm .theme-toggle__thumb { transform: translateX(20px); }
 
/* drawer header with toggle + close side by side */
.drawer__header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
 


/* ── Reset & Base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

ul {
  list-style: none;
}

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

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

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 3px;
}

/* ── Container ── */
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--outline:hover {
  background: var(--accent-glow);
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  color: var(--text);
  border-color: var(--border-hover);
}

.btn--sm {
  padding: 8px 18px;
  font-size: 14px;
}

.btn--full {
  width: 100%;
  justify-content: center;
}

/* ── Section Shared ── */
.section {
  padding: 100px 0;
}

.section__header {
  margin-bottom: 64px;
}

.section__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.job-type {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ══════════════════════════════
   NAVIGATION
══════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10, 10, 15, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
}

.nav.scrolled {
  border-bottom-color: rgba(124, 108, 252, 0.2);
}

.nav__container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  margin-right: auto;
}

.nav__logo-bracket {
  color: var(--accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 2px;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__link:hover {
  color: var(--text);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__cta {
  display: flex;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ══════════════════════════════
   HERO
══════════════════════════════ */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 40px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124, 108, 252, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 108, 252, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 80%);
  pointer-events: none;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: calc(100vh - var(--nav-h) - 60px);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 100px;
  font-size: 13px;
  color: var(--green);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero__badge-dot {
  width: 7px;
  height: 7px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

.hero__name {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 4vw, 5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero__name-accent {
  color: var(--accent);
}

.hero__role {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-muted);
  height: 28px;
  overflow: hidden;
}

.hero__role-prefix {
  color: var(--text-muted);
  white-space: nowrap;
}

/* 1. The 'Window' - must have the same height as one span */
.hero__role {
  height: 28px;
  overflow: hidden;
  /* This hides the other 4 roles */
  border-left: 2px solid var(--accent-2);
  /* Optional: visual flair */
  padding-left: 10px;
}

.hero__role-rotator {
  display: flex;
  flex-direction: column;
  /* Use negative translateY to pull items UP into the window */
  animation: rotateText 10s cubic-bezier(0.645, 0.045, 0.355, 1) infinite;
  color: var(--accent-2);
}

.hero__role-rotator span {
  height: 30px;
  line-height: 30px;
  white-space: nowrap;
}

@keyframes rotateText {

  /* 5 items = 20% chunks (0-20, 20-40, 40-60, 60-80, 80-100) */
  0%,
  18% {
    transform: translateY(0);
  }

  /* Item 1 */
  20%,
  38% {
    transform: translateY(-30px);
  }

  /* Item 2 */
  40%,
  58% {
    transform: translateY(-60px);
  }

  /* Item 3 */
  60%,
  78% {
    transform: translateY(-90px);
  }

  /* Item 4 */
  80%,
  98% {
    transform: translateY(-120px);
  }

  /* Item 5 */
  100% {
    transform: translateY(0);
  }

  /* Reset to Item 1 */
}

.hero__bio {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 100%;
}

.hero__company-link {
  color: var(--accent);
  border-bottom: 1px solid rgba(124, 108, 252, 0.4);
}

.hero__company-link:hover {
  color: var(--accent-2);
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.hero__stat {
  text-align: center;
}

.hero__stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.hero__stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

.hero__stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Hero Code Card */
.hero__visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero__code-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 100px rgba(124, 108, 252, 0.12);
}

.hero__code-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot--red {
  background: #ff5f57;
}

.dot--yellow {
  background: #febc2e;
}

.dot--green {
  background: #28c840;
}

.hero__code-filename {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 8px;
}

.hero__code {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  overflow-x: auto;
  tab-size: 2;
}

.hero__code code {
  white-space: pre;
}

.c-purple {
  color: #a78bfa;
}
/* 
.github-btn {
  color: white;
} */

.c-green {
  color: #34d399;
}

.c-blue {
  color: #60a5fa;
}

.c-yellow {
  color: #f59e0b;
}

.c-orange {
  color: #fb923c;
}

.c-red {
  color: rgb(230, 70, 100);
}

.hero__tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-pill {
  padding: 6px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {

  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(1);
  }

  50% {
    opacity: 1;
    transform: scaleY(1.2);
  }
}

/* ══════════════════════════════
   ABOUT
══════════════════════════════ */
.about {
  background: var(--bg-2);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 60px;
  align-items: start;
}

.about__lead {
  font-size: 19px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 20px;
}

.about__text p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.about__text strong {
  color: var(--text);
  font-weight: 500;
}

.about__text em {
  color: var(--accent-2);
  font-style: normal;
}

.about__values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 32px;
}

.about__value {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
}

.about__value i {
  color: var(--accent);
  width: 16px;
  text-align: center;
}

.about__info-card,
.about__edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}

.about__info-card h3,
.about__edu-card h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.about__info-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
}

.about__info-list li:last-child {
  border-bottom: none;
}

.about__info-list i {
  color: var(--accent);
  width: 14px;
  text-align: center;
}

.edu-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.edu-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.edu-item strong {
  display: block;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.edu-item span {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.edu-meta {
  color: var(--accent) !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  margin-top: 4px !important;
}

/* ══════════════════════════════
   SKILLS
══════════════════════════════ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition);
}

.skill-category:hover {
  border-color: var(--border-hover);
}

.skill-category__icon {
  width: 40px;
  height: 40px;
  background: var(--accent-glow);
  border: 1px solid rgba(124, 108, 252, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 16px;
  color: var(--accent);
}

.skill-category h3 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  padding: 4px 10px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.skill-tag--primary {
  background: var(--accent-glow);
  border-color: rgba(124, 108, 252, 0.3);
  color: var(--accent-2);
}

.skills__practices {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.skills__practices h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 28px;
}

.practices__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.practice-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.practice-item i {
  color: var(--accent);
  margin-top: 3px;
  flex-shrink: 0;
  font-size: 18px;
}

.practice-item strong {
  display: block;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
}

.practice-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ══════════════════════════════
   EXPERIENCE
══════════════════════════════ */
.experience {
  background: var(--bg-2);
}

.timeline {
  max-width: 800px;
}

.timeline__item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 24px;
  margin-bottom: 8px;
}

.timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 4px;
}

.timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 2px solid var(--text-dim);
  flex-shrink: 0;
}

.timeline__dot--active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(124, 108, 252, 0.2);
}

.timeline__line {
  width: 1px;
  flex: 1;
  background: var(--border);
  margin: 8px 0;
  min-height: 40px;
}

.timeline__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 20px;
  transition: border-color var(--transition);
}

.timeline__item--current .timeline__card {
  border-color: rgba(124, 108, 252, 0.3);
}

.timeline__card:hover {
  border-color: var(--border-hover);
}

.timeline__card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.timeline__role {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.timeline__company {
  display: block;
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 5px;
}

.timeline__company a {
  color: var(--accent);
}

.timeline__company a:hover {
  color: var(--accent-2);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  border: 1px solid rgba(124, 108, 252, 0.2);
  flex-shrink: 0;
}

.timeline__achievements {
  list-style: none;
  margin-bottom: 16px;
}

.timeline__achievements li {
  font-size: 14px;
  color: var(--text-muted);
  padding: 4px 0 4px 18px;
  position: relative;
  line-height: 1.6;
}

.timeline__achievements li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 12px;
}

.timeline__achievements strong {
  color: var(--text);
  font-weight: 500;
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.timeline__tags span {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
}

/* ══════════════════════════════
   PROJECTS
══════════════════════════════ */
.projects__featured {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.project-card--featured {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-3));
  border-color: rgba(124, 108, 252, 0.2);
}

.project-card--cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: transparent;
  border-style: dashed;
}

.project-card--cta:hover {
  border-color: var(--accent);
  transform: none;
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.project-card__type {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(124, 108, 252, 0.2);
}

.project-card__links {
  display: flex;
  gap: 10px;
}

.project-card__links a {
  color: var(--text-dim);
  font-size: 14px;
  transition: color var(--transition);
}

.project-card__links a:hover {
  color: var(--accent);
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.project-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.project-card__tech span {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
}

/* ══════════════════════════════
   SERVICES
══════════════════════════════ */
.services {
  background: var(--bg-2);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition);
}

.service-card:hover {
  border-color: var(--border-hover);
}

.service-card__icon {
  font-size: 24px;
  color: var(--accent);
  margin-bottom: 16px;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.service-card ul {
  list-style: none;
}

.service-card ul li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 5px 0 5px 18px;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.service-card ul li:last-child {
  border-bottom: none;
}

.service-card ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ══════════════════════════════
   CONTACT
══════════════════════════════ */
.contact__grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 60px;
  align-items: start;
}

.contact__lead {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact__methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact__method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact__method:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.contact__method i {
  width: 36px;
  height: 36px;
  background: var(--accent-glow);
  border: 1px solid rgba(124, 108, 252, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 14px;
  flex-shrink: 0;
}

.contact__method strong {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 2px;
}

.contact__method span {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
}

/* Contact Form */
.contact__form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

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

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group select {
  cursor: pointer;
}

.form-group select option {
  background: var(--bg-3);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  display: block;
  color: #f87171;
  font-size: 12px;
  margin-top: 4px;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert--success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  color: var(--green);
}

/* ══════════════════════════════
   FOOTER
══════════════════════════════ */
.footer {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.footer__brand span {
  font-size: 20px;
  font-weight: 800 !important;
}

.footer__brand p {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
  line-height: 1.6;
}

.footer__links {
  display: flex;
  gap: 16px;
}

.footer__links a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 16px;
  transition: all var(--transition);
}

.footer__links a:hover {
  color: var(--accent);
  border-color: var(--border-hover);
}

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.footer__bottom p {
  font-size: 15px;
  color: var(--text-dim);
  text-align: center;
}

/* ══════════════════════════════
   RESPONSIVE
══════════════════════════════ */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    order: -1;
  }

  .hero__code-card {
    max-width: 85% !important;
  }

  .hero__content {
    max-width: 85% !important;
  }

  .section__title {
    font-size: clamp(2rem, 2vw, 2rem);
    line-height: 1.2;
  }

  .hero__tech-pills {
    justify-content: flex-start;
  }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1030px) {
  .section {
    padding: 64px 0;
  }

  .nav__links {
    display: none;
  }

  .nav__links.active {
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: fixed;
    border-bottom: 1px solid var(--text-dim);
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(10px) !important;
    left: 50% !important;
    top: 100% !important;
    transform: translate(-50%, 0%);
    width: 100% !important;
    gap: 20px;
    z-index: 999;
  }


  .nav__links.active .nav__link {
    font-size: 24px;
  }

  .nav__burger {
    display: flex;
  }

  .nav__cta {
    display: none;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__stats {
    gap: 16px;
  }

  .skills__grid {
    grid-template-columns: 1fr;
  }

  .projects__featured {
    grid-template-columns: 1fr;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .practices__grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .about__values {
    grid-template-columns: 1fr;
  }
}

/* ── Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════
   FORM VALIDATION STYLES
══════════════════════════════ */
.form-required {
  color: #f87171;
  font-size: 12px;
}

.form-optional {
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 400;
}

.form-group input.is-invalid,
.form-group textarea.is-invalid,
.form-group select.is-invalid {
  border-color: #f87171;
  background: rgba(248, 113, 113, 0.05);
}

.form-group input.is-valid,
.form-group textarea.is-valid,
.form-group select.is-valid {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.04);
}

.form-group input.is-invalid:focus,
.form-group textarea.is-invalid:focus {
  border-color: #f87171;
}

.form-group input.is-valid:focus,
.form-group textarea.is-valid:focus {
  border-color: #22c55e;
}

.form-error {
  display: block;
  min-height: 18px;
  font-size: 12px;
  color: #f87171;
  margin-top: 5px;
  line-height: 1.4;
  transition: opacity 0.2s ease;
}

.form-error:empty {
  min-height: 0;
}

.form-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-top: 5px;
}

.form-char-count {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.form-char-count.near-limit {
  color: #f59e0b;
}

.form-char-count.at-limit {
  color: #f87171;
}

.form-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 12px;
}

.form-note i {
  color: var(--accent);
  margin-right: 4px;
}

.alert--danger {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.25);
  color: #f87171;
}

/* Honeypot — completely hidden from real users */
.form-honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* Submit button loading state */
#submitBtn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* ══════════════════════════════
   DATA SCIENCE & AI SECTION
══════════════════════════════ */
:root {
  --ds-accent: #fff;
  --ds-accent-glow: rgba(32, 190, 255, 0.95);
}

.ds-section {
  background: var(--bg);
}

.section__subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 680px;
  margin-top: 16px;
}

.ds-sub-heading {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ds-sub-heading i {
  color: var(--ds-accent);
  font-size: 16px;
}

/* DS project grid — 4 cols on desktop, 2 on tablet, 1 on mobile */
.ds-projects__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}

.ds-type {
  background: var(--ds-accent-glow) !important;
  border-color: rgba(32, 190, 255, 0.25) !important;
  color: var(--ds-accent) !important;
}

/* Kaggle strip */
.ds-kaggle-strip {
  display: flex;
  align-items: center;
  gap: 24px;
  background: linear-gradient(135deg, rgba(32, 190, 255, 0.07), rgba(32, 190, 255, 0.03));
  border: 1px solid rgba(32, 190, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  flex-wrap: wrap;
}

.ds-kaggle-strip__left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 200px;
}

.ds-kaggle-icon {
  font-size: 28px;
  color: #2CABE0;
  flex-shrink: 0;
}

.ds-kaggle-strip__left strong {
  display: block;
  font-size: 16px;
  font-weight:00;
  color: var(--text);
  margin-bottom: 3px;
}

.ds-kaggle-strip__left span {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.ds-kaggle-strip__stats {
  display: flex;
  gap: 24px;
  flex-shrink: 0;
}

.ds-stat {
  text-align: center;
}

.ds-stat span {
  display: block;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 800;
  color: #2CABE0;
  line-height: 1;
}

.ds-stat small {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 3px;
  display: block;
}

/* Certificates grid */
.certs__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
}

.cert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.cert-card__issuer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
  letter-spacing: -0.5px;
}

.cert-card__issuer--ibm {
  background: #ffffff;
  color: #0530AD;
  border: 1px solid #0530AD;
}

.cert-card__issuer--google {
  background: #fff;
  color: #1B4DA3;
  border: 1px solid #1B4DA3;
}

.cert-card__issuer--michigan {
  background: rgba(0, 39, 76, 1);
  color: #FFCB05;
  border: 1px solid rgba(255, 200, 5, 0.3);
}

.cert-card__issuer--kaggle {
  background: var(--ds-accent-glow);
  color: var(--ds-accent);
  border: 1px solid rgba(32, 190, 255, 0.25);
}

.cert-card__body {
  flex: 1;
}

.cert-card__body h4 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  margin: 0 0 5px;
  line-height: 1.4;
}

.cert-card__date {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.cert-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.cert-badge {
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

.cert-badge--ibm {
  background: rgba(0, 130, 255,1);
  color: #fff;
  border: 1px solid rgba(0, 130, 255, 0.2);
}

.cert-badge--google {
  background: rgba(50, 130, 255, 1);
  color: #fff;
  border: 1px solid rgba(66, 133, 244, 0.2);
}

.cert-badge--michigan {
  background: rgba(255, 203, 5, 1);
  color: #25373E;
  font-weight: 600;
  border: 1px solid rgba(255, 203, 5, 0.2);
}

.cert-badge--kaggle {
  background: var(--ds-accent-glow);
  color: var(--ds-accent);
  border: 1px solid rgba(32, 190, 255, 1);
}

.cert-badge--coursera {
  background: rgba(0, 86, 210, 1);
  color: #fff;
  border: 1px solid rgba(0, 86, 210, 0.2);
}

.cert-card__verify {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  text-decoration: none;
  align-self: flex-start;
  transition: color var(--transition);
}

.cert-card__verify:hover {
  color: var(--accent-2);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
  .ds-projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .ds-projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .certs__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .ds-projects__grid {
    grid-template-columns: 1fr;
  }

  .certs__grid {
    grid-template-columns: 1fr;
  }

  .ds-kaggle-strip {
    flex-direction: column;
    text-align: center;
  }

  .ds-kaggle-strip__left {
    flex-direction: column;
    text-align: center;
  }

  .ds-kaggle-strip__stats {
    justify-content: center;
  }
}