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

:root {
  --bg:           #0f0f0f;
  --card:         #1a1a1a;
  --border:       #2a2a2a;
  --text:         #f0f0f0;
  --muted:        #888;
  --muted-dark:   #555;
  --white:        #ffffff;
  --black:        #000000;
  --tag-bg:       #0f0f0f;
  --project-card-bg: #0f0f0f;
  --card-spotlight: #242424;

  --radius:       12px;
  --gap:          20px;
  --ease:         cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Light mode ───────────────────────────────────────── */
:root.light {
  --bg:           #f4f4f5;
  --card:         #ffffff;
  --border:       #e2e2e5;
  --text:         #111111;
  --muted:        #666666;
  --muted-dark:   #999999;
  --white:        #111111;
  --black:        #ffffff;
  --tag-bg:       #f0f0f1;
  --project-card-bg: #f7f7f8;
  --card-spotlight: #f9f9f9;
}

/* Transition all colour changes smoothly */
body, .card, .profile, .btn, .tag, .project-card,
.contact-item {
  transition-property: background, background-color, border-color, color, box-shadow;
  transition-duration: 0.3s;
  transition-timing-function: var(--ease);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

::selection { background: var(--white); color: var(--black); }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted-dark); }

/* ── Layout ───────────────────────────────────────────── */
.page {
  max-width: 1024px;
  margin: 0 auto;
  padding: 40px 24px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--gap);
  align-items: start;
}

.col { display: flex; flex-direction: column; gap: var(--gap); }

/* ── Card ─────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.card:hover {
  border-color: #383838;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
}

/* ── Profile Header ───────────────────────────────────── */
.profile {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: var(--gap);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.profile:hover {
  border-color: #383838;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.profile-top {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.profile-avatar-wrap {
  position: relative;
  width: 130px;
  height: 130px;
  flex-shrink: 0;
}
.profile-avatar-wrap:hover .profile-avatar {
  border-color: var(--muted-dark);
  transform: scale(1.04);
}
.profile-avatar {
  position: absolute;
  top: 0;
  left: 0;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  border: 2px solid var(--border);
  transition: opacity 0.4s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

/* Dark mode (default): dark avatar visible, light avatar hidden */
.avatar-dark  { opacity: 1; }
.avatar-light { opacity: 0; }

/* Light mode: light avatar visible, dark avatar hidden */
:root.light .avatar-dark  { opacity: 0; }
:root.light .avatar-light { opacity: 1; }

.profile-info { flex: 1; min-width: 0; }

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.profile-location {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 6px;
}

.profile-title { font-size: 0.85rem; color: var(--muted); }

/* ── Theme toggle button ──────────────────────────────── */
#theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.2s, color 0.2s, transform 0.2s var(--ease), background 0.3s;
}
#theme-toggle:hover { border-color: var(--muted-dark); color: var(--text); transform: scale(1.08); }

/* show/hide icons based on mode */
:root .icon-dark  { display: flex; }
:root .icon-light { display: none; }
:root.light .icon-dark  { display: none; }
:root.light .icon-light { display: flex; }

.profile-badge {
  background: var(--tag-bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 99px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.2s;
}
.profile-badge:hover { background: #2a2a2a; border-color: var(--muted-dark); }

.profile-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.15s var(--ease), box-shadow 0.2s var(--ease);
}
.btn:hover {
  border-color: var(--muted-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.btn:active { transform: translateY(0); }

.btn.btn-primary {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}
.btn.btn-primary:hover {
  background: #e8e8e8;
  border-color: #e8e8e8;
  box-shadow: 0 4px 16px rgba(255,255,255,0.12);
}

/* ── About ────────────────────────────────────────────── */
.about-body { display: flex; flex-direction: column; gap: 12px; }
.about-body p { font-size: 0.925rem; color: var(--muted); line-height: 1.75; }
.about-body a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
  transition: text-decoration-color 0.2s;
}
.about-body a:hover { text-decoration-color: var(--muted); }
.about-body strong { color: var(--text); font-weight: 500; }

/* ── Tech Stack ───────────────────────────────────────── */
.stack-group { margin-bottom: 18px; }
.stack-group:last-child { margin-bottom: 0; }
.stack-label { font-size: 0.75rem; color: var(--muted); font-weight: 500; margin-bottom: 10px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text);
  background: var(--tag-bg);
  border: 1px solid var(--border);
  padding: 5px 10px;
  border-radius: 6px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), color 0.2s;
  cursor: default;
}
.tag:hover {
  border-color: var(--muted-dark);
  transform: translateY(-1px);
  color: var(--white);
}

/* ── Projects ─────────────────────────────────────────── */
.projects-list { display: flex; flex-direction: column; gap: 12px; }

.project-card {
  background: var(--project-card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.project-card:hover {
  border-color: var(--muted-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.project-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.project-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.project-title { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 2px; }
.project-subtitle { font-size: 0.78rem; color: var(--muted); }

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color 0.2s, border-color 0.2s, transform 0.2s var(--ease);
}
.project-card:hover .project-link { color: var(--text); border-color: var(--muted-dark); transform: translate(1px, -1px); }

.project-desc { font-size: 0.875rem; color: var(--muted); line-height: 1.7; }

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.project-highlights li {
  font-size: 0.8rem;
  color: var(--muted);
  padding-left: 14px;
  position: relative;
}
.project-highlights li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--muted-dark);
  font-size: 0.7rem;
  top: 1px;
}

/* ── Education ────────────────────────────────────────── */
.edu-header { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 20px; }
.edu-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: contain;
  background: #fff;
  padding: 4px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}
.edu-logo:hover { transform: scale(1.06); }
.edu-name { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: 3px; }
.edu-degree { font-size: 0.8rem; color: var(--muted); margin-bottom: 2px; }
.edu-period { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; color: var(--muted-dark); }

.edu-divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

.awards-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}
.award-entry {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.award-entry-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--muted);
}
.award-entry-title { font-size: 0.85rem; font-weight: 400; color: var(--text); margin-bottom: 2px; }
.award-entry-sub { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; color: var(--muted); }

.coursework-label {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ── Experience ───────────────────────────────────────── */
.exp-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.2s var(--ease);
}
.exp-item:hover { padding-left: 4px; }
.exp-item:last-child { border-bottom: none; padding-bottom: 0; }
.exp-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}
.exp-item:hover .exp-logo { border-color: var(--muted-dark); transform: scale(1.05); }
.exp-info { flex: 1; min-width: 0; }
.exp-role { font-size: 0.925rem; font-weight: 500; color: var(--text); }
.exp-sub { font-size: 0.775rem; color: var(--muted); margin-top: 2px; }
.exp-sub a { transition: color 0.15s; }
.exp-sub a:hover { color: var(--text); }
.exp-period { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; color: var(--muted); flex-shrink: 0; margin-top: 3px; }

/* ── Contact ──────────────────────────────────────────── */
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  margin: 0 -12px;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.contact-item:hover { background: var(--tag-bg); transform: translateX(4px); }
.contact-icon { color: var(--muted); flex-shrink: 0; transition: color 0.2s; }
.contact-item:hover .contact-icon { color: var(--text); }
.contact-label { font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 2px; }
.contact-value { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--text); }
.contact-arrow { margin-left: auto; color: var(--muted); opacity: 0; transition: opacity 0.2s, transform 0.2s var(--ease); flex-shrink: 0; }
.contact-item:hover .contact-arrow { opacity: 1; transform: translateX(2px); }

/* ── Footer ───────────────────────────────────────────── */
footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
  /* Page */
  .page { padding: 14px; }

  /* Grid */
  .grid { grid-template-columns: 1fr; }

  /* Profile header */
  .profile { padding: 20px; position: relative; }
  .profile-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }
  .profile-info { text-align: center; }
  .profile-location { justify-content: center; }

  /* Float theme toggle + badge to top-right corner */
  .profile-meta {
    position: absolute !important;
    top: 16px;
    right: 16px;
    flex-shrink: 0;
  }

  /* CTAs: two per row then wrap */
  .profile-ctas {
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
  }
  .profile-ctas .btn {
    flex: 1 1 calc(50% - 4px);
    justify-content: center;
    min-width: 0;
    font-size: 0.8rem;
    padding: 9px 12px;
  }

  /* Cards */
  .card { padding: 20px; }

  /* Project cards */
  .project-link {
    font-size: 0.68rem;
    padding: 3px 8px;
  }

  /* Education tags */
  .tags { gap: 5px; }
  .tag { font-size: 0.7rem; padding: 4px 8px; }

  /* Experience */
  .exp-period { font-size: 0.68rem; }

  /* Contact */
  .contact-value { font-size: 0.75rem; word-break: break-all; }

  /* Awards */
  .award-entry-title { font-size: 0.82rem; }
}

/* ── Reduced motion ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}