/* ==========
  Base / Theme
   ========== */
:root {
  --bg: #fafafa;
  --text: #0f172a;
  --muted: #64748b;

  --border: rgba(15, 23, 42, 0.12);
  --card: rgba(255, 255, 255, 0.88);

  --shadow: 0 12px 34px rgba(15, 23, 42, 0.08);
  --hover: rgba(15, 23, 42, 0.06);

  --btn-bg: transparent;
  --btn-text: var(--text);
  --btn-border: rgba(15, 23, 42, 0.22);
}

body.dark {
  --bg: #0b1220;
  --text: #e5e7eb;
  --muted: rgba(229, 231, 235, 0.68);

  --border: rgba(255, 255, 255, 0.14);
  --card: rgba(255, 255, 255, 0.06);

  --shadow: 0 16px 38px rgba(0, 0, 0, 0.55);
  --hover: rgba(255, 255, 255, 0.09);

  --btn-bg: transparent;
  --btn-text: var(--text);
  --btn-border: rgba(255, 255, 255, 0.24);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 110%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);

  /* IMPORTANT: avoid double scaling.
     Keep font-size inherited from html (110%). */
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  /* Premium text rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========
  Topbar
   ========== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.95rem 6%;
  border-bottom: 1px solid var(--border);

  background: rgba(250, 250, 250, 0.75);
  backdrop-filter: blur(12px);
}

body.dark .topbar {
  background: rgba(11, 18, 32, 0.72);
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topbar-nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  opacity: 0.9;
}

.topbar-nav a:hover { opacity: 1; }

/* Icon-only button (theme toggle) */
.icon-btn {
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.45rem 0.6rem;
  border-radius: 10px;
  cursor: pointer;
}

.icon-btn:hover { background: var(--hover); }

/* Premium focus rings (keyboard accessibility) */
.btn:focus-visible,
.chip:focus-visible,
.icon-btn:focus-visible,
.search:focus-visible {
  outline: 2px solid rgba(100, 116, 139, 0.45);
  outline-offset: 3px;
}

/* ==========
  Layout
   ========== */
.section {
  padding: 3.6rem 6%;
  max-width: 1100px;
  margin: 0 auto;
}

.section-header h2 {
  margin: 0 0 0.35rem 0;
  font-size: 1.6rem;
}

.section-header p { margin: 0; }

#contact .section-header p {
  margin-bottom: 1.8rem;
}

/* ==========
  Hero
   ========== */
.hero {
  padding: 2.5rem 6% 1.2rem 6%;
  max-width: 1100px;
  margin: 0 auto;
}

.hero-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.4rem;
  align-items: center;
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.avatar {
  width: 9rem;
  height: 9rem;
  border-radius: 50%;
  object-fit: cover;

  image-rendering: auto;
  filter: contrast(0.97) saturate(1.03);

  /* Premium ring */
  border: 2px solid var(--border);
  background: var(--bg);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.04);
}

body.dark .avatar {
  box-shadow:
    0 0 0 3px rgba(255,255,255,0.08),
    0 10px 26px rgba(0,0,0,0.45);
}

.hero-title {
  margin: 0 0 0.35rem 0;
  font-size: 1.55rem;
  line-height: 1.3;
}

.muted { color: var(--muted); }

.hero-title .muted {
  font-weight: 500;
  font-size: 0.9em;
  opacity: 1;
}

.hero-subtitle {
  margin: 0 0 1rem 0;
  line-height: 1.6;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ==========
  Buttons
   ========== */
.btn {
  display: inline-flex;          /* ← change */
  align-items: center;           /* ← add */
  gap: 0.45rem;                  /* ← add */

  padding: 0.6rem 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.15px;
  transition: background 160ms ease, transform 160ms ease, border-color 160ms ease, filter 160ms ease;
}

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

/* Premium primary button (subtle, not flashy) */
.btn.primary {
  border-color: transparent;
  color: #ffffff;
  background: linear-gradient(180deg, #111827, #020617);
}

body.dark .btn.primary {
  background: linear-gradient(180deg, #f3f4f6, #cbd5e1);
  color: #0b1220;
}

.btn.primary:hover { filter: brightness(0.97); }

.btn.small {
  padding: 0.45rem 0.75rem;
  font-size: 0.92rem;
  border-radius: 10px;
}

.btn-icon {
  width: 1rem;
  height: 1rem;
  opacity: 0.8;
  flex-shrink: 0;
}

/* ==========
  Projects toolbar
   ========== */
.projects-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  align-items: center;
  margin: 1rem 0 1.2rem 0;
}

.search {
  flex: 1;
  min-width: 260px;
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  outline: none;
}

.search:focus { border-color: rgba(100, 116, 139, 0.65); }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  border: 1px solid var(--btn-border);
  background: transparent;
  color: var(--text);
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 650;
  font-size: 0.9rem;
  transition: background 160ms ease, transform 160ms ease;
}

.chip:hover {
  background: var(--hover);
  transform: translateY(-1px);
}

.chip.active {
  background: var(--text);
  color: var(--bg);
  border-color: transparent;
}

/* ==========
  Project cards
   ========== */
.projects-grid {
  display: grid;
  gap: 1rem;
  max-width: 680px;
  margin: 0 auto;
}

.project-card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 18px;
  padding: 1.1rem;
  box-shadow: var(--shadow);
}

.project-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: baseline;
}

.project-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: 0.85rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.card-actions {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

/* ==========
  Skills badges (not buttons)
   ========== */
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.badge {
  border: 1px solid var(--border);
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
  font-weight: 650;
}

/* ==========
  Prose
   ========== */
.prose { max-width: 900px; }

.prose p {
  line-height: 1.7;
  margin-top: 0;
  margin-bottom: 1rem;
}

/* ==========
  Footer
   ========== */
.footer {
  padding: 2rem 6%;
  border-top: 1px solid var(--border);
  text-align: center;
}

/* ==========
  Mobile tweaks
   ========== */
@media (max-width: 720px) {
  .topbar { padding: 0.85rem 4%; }

  .section, .hero {
    padding-left: 4%;
    padding-right: 4%;
  }

  .hero-card {
    grid-template-columns: 1fr;
    text-align: left;
  }

  /* Keep avatar scaling consistent (rem, not px) */
  .avatar {
    width: 7rem;
    height: 7rem;
  }

  .topbar-nav {
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

/* =========================
   Projects pages (simple layout)
   ========================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 6%;
}

header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 6% 0.5rem 6%;
}

header h1 {
  margin: 0 0 0.35rem 0;
  font-size: 2rem;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 6% 1rem 6%;
  display: flex;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  opacity: 0.9;
}

nav a:hover { opacity: 1; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.75rem;
}

.project {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 18px;
  padding: 1.1rem;
  box-shadow: var(--shadow);
  margin-top: 1rem;
}

.screenshot img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
}