/* ── Base & typography ──────────────────────────────────────────────────── */
:root {
  --fe-font-serif: 'Georgia', 'Times New Roman', serif;
  --fe-transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

body {
  font-family: var(--fe-font-serif);
  transition: var(--fe-transition);
}

.navbar-brand {
  font-family: var(--fe-font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}

/* ── Theme: Light (Bootstrap default) ──────────────────────────────────── */
[data-bs-theme="light"] {
  --fe-accent:        #6c757d;
  --fe-accent-subtle: #f8f9fa;
  --fe-link:          #0d6efd;
}

/* ── Theme: Dark (Bootstrap built-in) ──────────────────────────────────── */
[data-bs-theme="dark"] {
  --fe-accent:        #adb5bd;
  --fe-accent-subtle: #212529;
  --fe-link:          #6ea8fe;
}

/* ── Theme: Saffron ─────────────────────────────────────────────────────── */
[data-bs-theme="saffron"] {
  color-scheme: light;
  --bs-body-bg:           #fdf6e3;
  --bs-body-color:        #3b2a00;
  --bs-secondary-color:   #7a5c00;
  --bs-border-color:      #e8c97a;
  --bs-link-color:        #b35900;
  --bs-link-hover-color:  #7a3c00;
  --bs-nav-link-color:    #3b2a00;
  --bs-navbar-color:      #3b2a00;
  --bs-navbar-active-color: #b35900;
  --bs-card-bg:           #fef9ee;
  --bs-card-border-color: #e8c97a;
  --bs-code-color:        #b35900;
  --fe-accent:            #b35900;
  --fe-accent-subtle:     #fef4d6;
  --fe-link:              #b35900;

  background-color: var(--bs-body-bg);
  color: var(--bs-body-color);
}

[data-bs-theme="saffron"] .navbar {
  background-color: #f5e6b0 !important;
  border-bottom: 1px solid #e8c97a;
}

[data-bs-theme="saffron"] .navbar-brand,
[data-bs-theme="saffron"] .nav-link {
  color: #3b2a00 !important;
}

[data-bs-theme="saffron"] .nav-link:hover,
[data-bs-theme="saffron"] .nav-link.active {
  color: #b35900 !important;
}

[data-bs-theme="saffron"] .dropdown-menu {
  background-color: #fef9ee;
  border-color: #e8c97a;
}

[data-bs-theme="saffron"] .dropdown-item {
  color: #3b2a00;
}

[data-bs-theme="saffron"] .dropdown-item:hover {
  background-color: #f5e6b0;
  color: #b35900;
}

[data-bs-theme="saffron"] .card {
  background-color: var(--bs-card-bg);
  border-color: var(--bs-card-border-color);
}

[data-bs-theme="saffron"] footer {
  background-color: #f5e6b0 !important;
  border-top: 1px solid #e8c97a;
}

/* ── Theme: Forest ──────────────────────────────────────────────────────── */
[data-bs-theme="forest"] {
  color-scheme: dark;
  --bs-body-bg:           #0f1a0f;
  --bs-body-color:        #c8ddb8;
  --bs-secondary-color:   #8fad78;
  --bs-border-color:      #2e4a2e;
  --bs-link-color:        #7fcc5f;
  --bs-link-hover-color:  #a8e88a;
  --bs-nav-link-color:    #c8ddb8;
  --bs-navbar-color:      #c8ddb8;
  --bs-navbar-active-color: #7fcc5f;
  --bs-card-bg:           #162116;
  --bs-card-border-color: #2e4a2e;
  --bs-code-color:        #7fcc5f;
  --fe-accent:            #7fcc5f;
  --fe-accent-subtle:     #162116;
  --fe-link:              #7fcc5f;

  background-color: var(--bs-body-bg);
  color: var(--bs-body-color);
}

[data-bs-theme="forest"] .navbar {
  background-color: #0a120a !important;
  border-bottom: 1px solid #2e4a2e;
}

[data-bs-theme="forest"] .navbar-brand,
[data-bs-theme="forest"] .nav-link {
  color: #c8ddb8 !important;
}

[data-bs-theme="forest"] .nav-link:hover,
[data-bs-theme="forest"] .nav-link.active {
  color: #7fcc5f !important;
}

[data-bs-theme="forest"] .dropdown-menu {
  background-color: #162116;
  border-color: #2e4a2e;
}

[data-bs-theme="forest"] .dropdown-item {
  color: #c8ddb8;
}

[data-bs-theme="forest"] .dropdown-item:hover {
  background-color: #1e2e1e;
  color: #7fcc5f;
}

[data-bs-theme="forest"] .card {
  background-color: var(--bs-card-bg);
  border-color: var(--bs-card-border-color);
}

[data-bs-theme="forest"] footer {
  background-color: #0a120a !important;
  border-top: 1px solid #2e4a2e;
}

/* ── Shared layout helpers ──────────────────────────────────────────────── */
main {
  min-height: calc(100vh - 120px);
  padding: 2.5rem 0 3rem;
}

.page-title {
  border-bottom: 1px solid var(--bs-border-color);
  padding-bottom: 0.6rem;
  margin-bottom: 1.5rem;
}

.section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fe-accent);
}

/* Project cards */
.project-card {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

/* Sanskrit / Devanāgarī text */
.deva {
  font-family: 'Noto Serif', serif;
  font-size: 1.05em;
}

/* Theme switcher button strip */
#theme-switcher {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}
.theme-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: border-color 0.15s, transform 0.1s;
}
.theme-btn:hover { transform: scale(1.15); }
.theme-btn.active  { border-color: var(--bs-body-color) !important; }
.theme-btn[data-theme="light"]   { background: #f8f9fa; border-color: #dee2e6; }
.theme-btn[data-theme="dark"]    { background: #212529; border-color: #495057; }
.theme-btn[data-theme="saffron"] { background: linear-gradient(135deg, #f5a623, #fdf6e3); }
.theme-btn[data-theme="forest"]  { background: linear-gradient(135deg, #2e4a2e, #7fcc5f); }

/* Footer */
footer {
  font-size: 0.85rem;
  padding: 1.2rem 0;
}