/* =====================================================================
   stuarttufft.com — style.css
   Brand tokens + Bootstrap overrides only.
   Bootstrap handles: grid, nav, cards, badges, forms, buttons, utilities.
   ===================================================================== */

/* ── CSS Custom Properties ─────────────────────────────────────────── */
:root {
  --st-bg:           #F7F5F0;
  --st-surface:      #FDFCF9;
  --st-surface-alt:  #F2F0EB;
  --st-text:         #1A1A17;
  --st-text-mid:     #5A5A52;
  --st-text-light:   #8C8B82;
  --st-accent:       #A8E63D;
  --st-accent-dark:  #7CB82C;
  --st-accent-tint:  rgba(168, 230, 61, 0.12);
  --st-border:       #E6E4DB;

  /* Bootstrap font overrides */
  --bs-body-font-family: 'Inter', 'Helvetica Neue', sans-serif;
  --bs-body-font-weight: 300;
  --bs-font-sans-serif:  'Roboto', 'Helvetica Neue', sans-serif;
  --bs-body-bg:          var(--st-bg);
  --bs-body-color:       var(--st-text);
  --bs-border-color:     var(--st-border);
}

[data-bs-theme="dark"] {
  --st-bg:           #1E1D19;
  --st-surface:      #28271F;
  --st-surface-alt:  #232219;
  --st-text:         #F0EDE6;
  --st-text-mid:     #AEADA4;
  --st-text-light:   #6A6960;
  --st-accent:       #A8E63D;
  --st-accent-dark:  #C2EF6A;
  --st-accent-tint:  rgba(168, 230, 61, 0.15);
  --st-border:       #353429;

  --bs-body-bg:    var(--st-bg);
  --bs-body-color: var(--st-text);
  --bs-border-color: var(--st-border);
}

/* ── Base ───────────────────────────────────────────────────────────── */
body {
  background-color: var(--st-bg);
  color: var(--st-text);
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: 'Roboto', 'Helvetica Neue', sans-serif;
}

/* ── Nav Logo Dot ───────────────────────────────────────────────────── */
.nav-logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--st-accent);
  flex-shrink: 0;
}

/* ── Nav scroll state ───────────────────────────────────────────────── */
#mainNav {
  background-color: var(--st-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#mainNav.scrolled {
  border-bottom-color: var(--st-border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-bs-theme="dark"] #mainNav {
  background-color: var(--st-bg);
}

/* ── Accent Button ──────────────────────────────────────────────────── */
.btn-accent {
  background-color: var(--st-accent);
  color: var(--st-text);
  border: none;
  font-weight: 500;
  transition: background-color 0.18s, transform 0.15s;
}

.btn-accent:hover,
.btn-accent:focus {
  background-color: var(--st-accent-dark);
  color: var(--st-text);
  transform: translateY(-1px);
}

[data-bs-theme="dark"] .btn-accent {
  color: #1A1A17;
}

/* ── Section Eyebrow ────────────────────────────────────────────────── */
.section-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--st-text-light);
}

/* ── em in headings (accent highlight) ─────────────────────────────── */
h1 em, h2 em, h3 em,
.h1 em, .h2 em, .h3 em, .display-4 em, .display-5 em {
  font-style: normal;
  color: var(--st-accent-dark);
}

[data-bs-theme="dark"] h1 em,
[data-bs-theme="dark"] h2 em,
[data-bs-theme="dark"] h3 em,
[data-bs-theme="dark"] .display-4 em,
[data-bs-theme="dark"] .display-5 em {
  color: var(--st-accent-dark);
}

/* ── Scroll Reveal ──────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

.reveal.d1 { transition-delay: 80ms; }
.reveal.d2 { transition-delay: 160ms; }
.reveal.d3 { transition-delay: 240ms; }

/* ── Cert Cards ─────────────────────────────────────────────────────── */
.cert-card {
  background-color: var(--st-surface);
  border: 1px solid var(--st-border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  transition: box-shadow 0.18s;
}

.cert-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* Custom cert top border colours */
.cert-security    { border-top: 3px solid #9B59B6; }
.cert-m365        { border-top: 3px solid #3498DB; }
.cert-azure       { border-top: 3px solid #00BCD4; }
.cert-power       { border-top: 3px solid #5C6BC0; }
.cert-ai          { border-top: 3px solid #26A69A; }

/* ── Post Cards ─────────────────────────────────────────────────────── */
.post-card {
  background-color: var(--st-surface);
  border: 1px solid var(--st-border) !important;
  border-radius: 10px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

[data-bs-theme="dark"] .post-card {
  background-color: var(--st-surface);
}

/* ── Video Wrap (16:9) ──────────────────────────────────────────────── */
.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 10px;
  margin-bottom: 2rem;
}

.video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ── Reading Column ─────────────────────────────────────────────────── */
.reading-col {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Newsletter Card ────────────────────────────────────────────────── */
.newsletter-card {
  background-color: var(--st-text);
  color: var(--st-bg);
  border-radius: 16px;
  padding: 2.5rem;
}

.newsletter-card .section-eyebrow {
  color: var(--st-text-light);
}

.newsletter-card p {
  color: var(--st-text-mid);
}

/* Prevent double-invert in dark mode */
[data-bs-theme="dark"] .newsletter-card {
  background-color: var(--st-surface-alt);
  color: var(--st-text);
}

[data-bs-theme="dark"] .newsletter-card p {
  color: var(--st-text-mid);
}

/* ── Stat Cards ─────────────────────────────────────────────────────── */
.stat-card {
  background-color: var(--st-surface);
  border: 1px solid var(--st-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.stat-card .stat-value {
  font-family: 'Roboto', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--st-text);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--st-text-mid);
  line-height: 1.4;
}

/* ── Headshot ───────────────────────────────────────────────────────── */
.headshot {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--st-border);
}

/* ── Search Input ───────────────────────────────────────────────────── */
.search-wrap {
  position: relative;
}

.search-wrap .bi-search {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--st-text-light);
  pointer-events: none;
}

.search-wrap .form-control {
  padding-left: 2.4rem;
}

/* ── Project Cards ──────────────────────────────────────────────────── */
.project-card {
  background-color: var(--st-surface);
  border: 1px solid var(--st-border);
  border-radius: 12px;
  padding: 1.5rem;
  height: 100%;
  transition: box-shadow 0.2s, transform 0.2s;
}

.project-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

/* ── Home: hero photo ───────────────────────────────────────────────── */
.hero-img-wrap {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 380px;
}

.hero-img-wrap img {
  border-radius: 16px;
  width: 100%;
  display: block;
  position: relative;
  z-index: 1;
  object-fit: cover;
}

.hero-img-accent {
  position: absolute;
  inset: 16px -16px -16px 16px;
  border-radius: 16px;
  background: var(--st-accent-tint);
  border: 2px solid var(--st-accent);
  z-index: 0;
}

/* ── Home: section alt background ───────────────────────────────────── */
.section-alt {
  background-color: var(--st-surface-alt);
}

/* ── Home: Watch / YouTube section ─────────────────────────────────── */
.section-watch {
  background-color: var(--st-text);
  color: var(--st-bg);
}

.section-watch h2 {
  color: var(--st-bg);
}

.section-watch p,
.section-watch .text-muted-watch {
  color: var(--st-text-mid);
}

.section-watch .section-eyebrow {
  color: var(--st-accent);
}

[data-bs-theme="dark"] .section-watch {
  background-color: var(--st-surface-alt);
  border-top: 1px solid var(--st-border);
}

[data-bs-theme="dark"] .section-watch h2 {
  color: var(--st-text);
}

/* ── YouTube placeholder card ───────────────────────────────────────── */
.yt-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background-color: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  transition: background-color 0.2s;
  overflow: hidden;
}

.yt-placeholder:hover {
  background-color: rgba(0, 0, 0, 0.65);
}

.yt-play-btn {
  width: 64px;
  height: 64px;
  background-color: #FF0000;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  flex-shrink: 0;
  transition: transform 0.15s, background-color 0.15s;
}

.yt-placeholder:hover .yt-play-btn {
  transform: scale(1.08);
  background-color: #cc0000;
}

/* ── Scroll-down indicator ───────────────────────────────────────────── */
.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--st-text-light);
  animation: bounce 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ── Post article typography ────────────────────────────────────────── */
.post-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.post-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.post-body p {
  margin-bottom: 1.2rem;
  line-height: 1.75;
}

.post-body ul,
.post-body ol {
  margin-bottom: 1.2rem;
  padding-left: 1.5rem;
}

.post-body li {
  margin-bottom: 0.4rem;
  line-height: 1.7;
}

.post-body code {
  background-color: var(--st-surface-alt);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.9em;
}

.post-body pre {
  background-color: var(--st-surface-alt);
  border: 1px solid var(--st-border);
  border-radius: 8px;
  padding: 1.2rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.post-body blockquote {
  border-left: 3px solid var(--st-accent);
  padding-left: 1.2rem;
  margin: 1.5rem 0;
  color: var(--st-text-mid);
}

/* ── Theme toggle icon visibility ───────────────────────────────────── */
[data-bs-theme="light"] .icon-sun { display: none !important; }
[data-bs-theme="light"] .icon-moon { display: inline !important; }
[data-bs-theme="dark"]  .icon-sun { display: inline !important; }
[data-bs-theme="dark"]  .icon-moon { display: none !important; }