/* Portfolio - Minimal 2026 style */
:root {
  --bg-main: #FFFFFF;
  --bg-alt: #F8FAFC;
  --text-primary: #1E293B;
  --accent-blue: #3B82F6;
  --accent-green: #10B981;
  --accent-orange: #F97316;
  --gray-light: #F1F5F9;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, #F8FAFC 0%, #E0E7FF 50%, #FEF3C7 100%);
  padding-top: 80px;
}
.hero-book-icon {
  line-height: 1;
}
.hero-book-icon i {
  font-size: 7rem;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 4px 16px rgba(99,102,241,0.18));
}
.hero-name {
  font-size: 2.4rem;
  letter-spacing: -0.5px;
}

/* Cards */
.portfolio-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.08) !important;
}

.btn-primary {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}
.btn-primary:hover {
  background: #2563EB;
  border-color: #2563EB;
}

/* Footer */
.footer-custom {
  background: var(--gray-light);
}

.back-to-top:hover {
  background: var(--accent-blue);
  color: white !important;
}

/* Admin */
.admin-bg { background: var(--bg-alt); }
.admin-login-bg { background: var(--bg-alt); min-height: 100vh; }

/* Navbar shadow */
.navbar.shadow-sm { box-shadow: 0 1px 3px rgba(0,0,0,0.06) !important; }

/* AOS delay fix */
[data-aos] { pointer-events: auto; }

/* ── Contact form ───────────────────────────────────────────────────────── */
.contact-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #64748b;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.contact-input {
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
  font-size: 0.95rem;
  padding: 10px 14px;
  color: #1e293b;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.contact-input:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
  outline: none;
}

/* PDF Card Thumbnail */
.pdf-card-thumb {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #f1f5f9;
}
.pdf-card-thumb canvas.pdf-thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  display: none;
}
.pdf-card-thumb .thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.07) 100%);
  pointer-events: none;
  transition: background 0.2s;
}
.portfolio-card:hover .thumb-overlay {
  background: linear-gradient(to bottom, rgba(59,130,246,0.04) 0%, rgba(0,0,0,0.12) 100%);
}
.pdf-card-thumb .thumb-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pdf-card-thumb .preview-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
}
.portfolio-card[data-bs-toggle="modal"] {
  cursor: pointer;
}
.portfolio-card[data-bs-toggle="modal"]:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}