/* ============================================================
   PORTFOLIO — style.css
   ============================================================ */

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

:root {
  --bg:           #FFFFFF;
  --bg-alt:       #F7F7F7;
  --bg-dark:      #111111;
  --text:         #0A0A0A;
  --text-muted:   #737373;
  --text-light:   #A3A3A3;
  --accent:       #0A0A0A;
  --accent-hover: #333333;
  --border:       #E5E5E5;
  --border-dark:  #D4D4D4;
  --card-bg:      #FFFFFF;
  --card-hover:   #FAFAFA;
  --radius:       10px;
  --shadow-sm:    0 1px 4px rgba(0,0,0,0.06);
  --shadow:       0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.14);
  --max-w:        1100px;
  --transition:   0.22s ease;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --bg:           #0F0F0F;
  --bg-alt:       #1A1A1A;
  --bg-dark:      #000000;
  --text:         #F0F0F0;
  --text-muted:   #A3A3A3;
  --text-light:   #6B6B6B;
  --accent:       #F0F0F0;
  --accent-hover: #CCCCCC;
  --border:       #2A2A2A;
  --border-dark:  #3A3A3A;
  --card-bg:      #161616;
  --card-hover:   #1E1E1E;
  --shadow-sm:    0 1px 4px rgba(0,0,0,0.3);
  --shadow:       0 4px 20px rgba(0,0,0,0.4);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.6);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
ul, ol { list-style: none; }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}

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

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 56px;
  max-width: 640px;
  margin-inline: auto;
}

.text-center { text-align: center; }
.text-center .section-subtitle { margin-inline: auto; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  border: 1.5px solid transparent;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background-color: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.btn-primary:hover {
  background-color: var(--bg);
  color: var(--text);
  border-color: var(--text);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.btn-outline {
  background-color: var(--bg);
  color: var(--text);
  border-color: var(--border-dark);
}

.btn-outline:hover {
  background-color: var(--bg-alt);
  color: var(--text);
  border-color: var(--text);
  transform: translateY(-1px);
}

.btn-gray {
  background-color: var(--bg-alt);
  color: var(--text-muted);
  border-color: var(--border-dark);
}

.btn-gray:hover {
  background-color: var(--border-dark);
  color: var(--text);
  border-color: var(--border-dark);
  transform: translateY(-1px);
}

.hero-resume { margin-left: auto; }


/* ── Fade-in ── */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition), border-color var(--transition);
}

[data-theme="dark"] .site-header {
  background-color: rgba(15,15,15,0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.logo {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.nav-links {
  display: flex;
  gap: 32px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--text);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

/* Dark mode toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-dark);
  background-color: var(--bg-alt);
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.theme-toggle svg { pointer-events: none; }

.nav-resume-mobile { display: none; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.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); }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-block: 96px;
  background-color: var(--bg);
  background-image: radial-gradient(circle, #DCDCDC 1px, transparent 1px);
  background-size: 28px 28px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,0,0,0.03) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 72px;
  align-items: center;
  width: 100%;
  max-width: var(--max-w);
}

.hero-content { max-width: 560px; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-eyebrow::before { display: none; }

.hero-name {
  font-size: clamp(2.8rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 20px;
}

.hero-name span { color: var(--text-muted); }

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-role {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.hero-divider {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--border-dark);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-alt);
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 100px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 28px;
  line-height: 1.8;
}

/* Hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 40px;
  padding: 20px 24px;
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stat-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background-color: var(--border-dark);
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Uniform bold text colour ── */
.hero-name span { color: var(--text); }

.achievement-card-hero .achievement-body h3 { color: var(--text); }
.achievement-card-hero .achievement-body p { color: var(--text-muted); }
.achievement-card-hero { border-color: var(--border-dark); border-width: 1.5px; background-color: var(--bg-alt); }
.hero-photo-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-photo-wrap::before {
  content: '';
  position: absolute;
  inset: -16px;
  border-radius: 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  z-index: 0;
}

.hero-photo-wrap img {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: var(--shadow-hover);
}

/* ── Projects ── */
.projects .section-title { margin-bottom: 8px; }

.project-grid-featured {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.project-card-featured .project-img-wrap { aspect-ratio: 16 / 9; }

.project-card-featured .project-body {
  padding: 20px 22px;
  gap: 10px;
}

.project-card-featured .project-body h3 { font-size: 1rem; }

.project-featured-label {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: 4px;
}

.other-projects-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

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

.project-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-dark);
}

.project-img-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--bg-alt);
}

.project-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .project-img-wrap img { transform: scale(1.04); }

.project-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
}

.project-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

.project-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}

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

.project-tags span {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 100px;
}

.project-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* ── Experience Cards ── */
.experience .section-subtitle { margin-bottom: 48px; }

.experience-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin-inline: auto;
}

.exp-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.exp-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-dark);
  transform: translateY(-2px);
}

.exp-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 32px;
  border-right: 1px solid var(--border);
}

.exp-date {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.exp-company {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.exp-focus {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.exp-about {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.55;
  margin-top: 2px;
}

.exp-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  width: fit-content;
}

.exp-right h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}

.exp-bullets {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.exp-bullets li {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  padding-left: 16px;
  position: relative;
}

.exp-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--text-light);
  font-size: 0.75rem;
  top: 2px;
}

/* ── Achievements ── */
.achievements-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 960px;
  margin-inline: auto;
}

.achievement-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.achievement-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-dark);
}

.achievement-img-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--bg-alt);
}

.achievement-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.achievement-card:hover .achievement-img-wrap img { transform: scale(1.04); }

.achievement-card-hero {
  grid-column: 1 / -1;
  border-color: var(--border);
  border-width: 1px;
}

.achievement-card-hero .achievement-body h3 { color: var(--text); font-size: 1.05rem; }
.achievement-card-hero .achievement-body p { color: var(--text-muted); }

.achievement-card-hero .achievement-img-wrap { aspect-ratio: 21 / 9; }

.achievement-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.achievement-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.achievement-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.contact-about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-about-text .section-title { margin-bottom: 12px; }

.contact-about-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 14px;
  font-size: 0.95rem;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 24px;
  padding: 8px 16px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  transition: background-color var(--transition), border-color var(--transition);
}

.contact-email:hover {
  background-color: var(--bg-alt);
  border-color: var(--text);
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background-color: var(--bg-alt);
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.social-links a:hover {
  color: var(--text);
  border-color: var(--text);
  background-color: var(--bg);
}

/* Contact Form */
.contact-form-wrap {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}

.contact-form-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background-color: var(--bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--text);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}

.form-status {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 20px;
}

/* ── Footer ── */
.site-footer {
  background-color: var(--bg-dark);
  color: #737373;
  padding-block: 40px;
  border-top: 1px solid #1F1F1F;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-inner p {
  font-size: 0.85rem;
  color: #737373;
}

.site-footer nav { display: flex; gap: 24px; }

.site-footer nav a {
  font-size: 0.85rem;
  color: #737373;
  transition: color var(--transition);
}

.site-footer nav a:hover { color: #FFFFFF; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ── Tablet (≤ 1024px) ── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr 280px; gap: 48px; }

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

  .contact-about { gap: 40px; }
  .contact-form-row { grid-template-columns: 1fr 1fr; }
  .achievements-grid { grid-template-columns: 1fr; }
}

/* ── Mobile (≤ 640px) ── */
@media (max-width: 640px) {
  .section { padding-block: 64px; }

  .hamburger { display: flex; }

  /* Keep theme toggle visible, hide only the text buttons */
  .nav-actions .btn { display: none; }
  .theme-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    z-index: 99;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    padding: 14px 24px;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a:last-child { border-bottom: none; }
  .nav-links a::after { display: none; }

  /* Add Download Resume as a nav link on mobile */
  .nav-resume-mobile { display: block; }

  .hero { min-height: auto; padding-block: 80px 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-photo-wrap { max-width: 240px; margin-inline: auto; }
  .hero-name { font-size: 2.6rem; }
  .hero-stats { padding: 16px; gap: 16px; }

  /* Fix Download Resume button alignment on mobile */
  .hero-cta { flex-wrap: wrap; }
  .hero-resume { margin-left: 0; width: 100%; justify-content: center; }

  .project-grid-featured,
  .project-grid-secondary { grid-template-columns: 1fr; }
  .project-grid-featured { margin-bottom: 40px; }

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

  .contact-about { grid-template-columns: 1fr; gap: 40px; }
  .exp-card { grid-template-columns: 1fr; gap: 16px; }
  .exp-left { border-right: none; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 16px; flex-direction: row; align-items: center; flex-wrap: wrap; gap: 10px; }
  .contact-form-wrap { padding: 24px; }
  .contact-form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; text-align: center; }
}