/* ============================================
   ACT System - Public Frontend Theme
   Primary: #2563eb (Blue) / Accent: #f97316 (Orange)
   ============================================ */

:root {
    --pub-primary: #2563eb;
    --pub-primary-dark: #1d4ed8;
    --pub-accent: #f97316;
    --pub-accent-dark: #ea580c;
    --pub-bg: #f8fafc;
    --pub-text: #1e293b;
    --pub-muted: #64748b;
    --pub-border: #e2e8f0;
    --pub-radius: 1rem;
    --pub-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --pub-shadow-lg: 0 10px 25px rgba(0,0,0,.1);
}

* { font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; }
body { background: var(--pub-bg); color: var(--pub-text); }

/* --- Navbar --- */
.public-nav {
    background: rgba(255,255,255,.95) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
    transition: box-shadow .3s;
}
.public-nav .navbar-brand { color: var(--pub-primary) !important; font-weight: 800; letter-spacing: -0.5px; }
.public-nav .nav-link { color: var(--pub-text); font-weight: 500; padding: .5rem 1rem; border-radius: .5rem; transition: all .2s; }
.public-nav .nav-link:hover { color: var(--pub-primary); background: rgba(37,99,235,.06); }

/* --- Buttons --- */
.btn-primary { background: var(--pub-primary); border-color: var(--pub-primary); }
.btn-primary:hover { background: var(--pub-primary-dark); border-color: var(--pub-primary-dark); transform: translateY(-1px); box-shadow: var(--pub-shadow-lg); }
.btn-outline-primary { color: var(--pub-primary); border-color: var(--pub-primary); }
.btn-outline-primary:hover { background: var(--pub-primary); border-color: var(--pub-primary); }

/* --- Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 6rem 0 5rem;
    position: relative;
    overflow: hidden;
}
.hero-section::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(249,115,22,.15), transparent 70%);
    border-radius: 50%;
}
.hero-title { color: #fff; font-weight: 900; letter-spacing: -1px; }
.hero-subtitle { color: rgba(255,255,255,.7); }
.min-vh-50 { min-height: 50vh; }

/* --- Section Titles --- */
.section-title { font-weight: 800; letter-spacing: -0.5px; position: relative; }

/* --- Course Cards --- */
.course-card { transition: all .3s cubic-bezier(.4,0,.2,1); border: 1px solid var(--pub-border); }
.course-card:hover { transform: translateY(-6px); box-shadow: var(--pub-shadow-lg); }
.course-card-img { overflow: hidden; }
.course-card-img img { transition: transform .4s; }
.course-card:hover .course-card-img img { transform: scale(1.05); }

/* --- Category Cards --- */
.category-card { transition: all .2s; border-color: var(--pub-border) !important; }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--pub-shadow); border-color: var(--pub-primary) !important; }

/* --- Hover Shadow --- */
.hover-shadow { transition: all .3s; }
.hover-shadow:hover { transform: translateY(-4px); box-shadow: var(--pub-shadow-lg) !important; }

/* --- Pulse Button --- */
.pulse-btn { animation: pulse 2s infinite; }
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37,99,235,.4); }
    70% { box-shadow: 0 0 0 12px rgba(37,99,235,0); }
    100% { box-shadow: 0 0 0 0 rgba(37,99,235,0); }
}

/* --- Mobile Fixed CTA --- */
.mobile-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 -2px 10px rgba(0,0,0,.1);
    z-index: 1030;
    padding: .5rem 0;
}

/* --- Footer --- */
.public-footer { background: #0f172a; color: rgba(255,255,255,.6); padding: 3rem 0; }
.public-footer a { color: rgba(255,255,255,.6); text-decoration: none; }
.public-footer a:hover { color: #fff; }

/* --- Badges --- */
.badge { font-weight: 500; }
.bg-purple-subtle { background: rgba(139,92,246,.1) !important; }
.text-purple { color: #7c3aed !important; }

/* --- Content Box --- */
.content-box { line-height: 1.8; }
.course-content-html img { max-width: 100%; height: auto; border-radius: .5rem; }

/* --- Object Fit --- */
.object-fit-cover { object-fit: cover; }

/* --- Form --- */
.form-control:focus, .form-select:focus { border-color: var(--pub-primary); box-shadow: 0 0 0 .2rem rgba(37,99,235,.15); }

/* --- Pagination --- */
.pagination .page-link { color: var(--pub-primary); border-radius: .5rem; margin: 0 2px; border: none; }
.pagination .page-item.active .page-link { background: var(--pub-primary); border-color: var(--pub-primary); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero-section { padding: 5rem 0 3rem; }
    .hero-title { font-size: 2rem; }
    .mobile-cta { display: block; }
    body { padding-bottom: 60px; }
}
@media (min-width: 992px) {
    .mobile-cta { display: none !important; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* --- Print --- */
@media print {
    .public-nav, .public-footer, .mobile-cta, .btn { display: none !important; }
    body { background: #fff; }
}

/* --- FW helpers --- */
.fw-500 { font-weight: 500; }
.fw-900 { font-weight: 900; }