:root {
  --color-primary: #0F4C6B;
  --color-primary-dark: #0A3750;
  --color-primary-light: #E7F0F5;
  --color-accent: #F2A93B;
  --color-accent-dark: #D9891A;
  --color-success: #1F9D55;
  --color-success-light: #E5F6EC;
  --color-warning: #B8860B;
  --color-warning-light: #FDF3DC;
  --color-danger: #C23B3B;
  --color-danger-light: #FBE9E9;
  --color-ink: #1E2A32;
  --color-muted: #5C7080;
  --color-bg: #F4F7F9;
  --color-surface: #FFFFFF;
  --color-border: #E3E9ED;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 76, 107, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 76, 107, 0.10);
  --shadow-lg: 0 20px 45px rgba(10, 55, 80, 0.16);
  --font-heading: 'Poppins', 'Calibri', Arial, sans-serif;
  --font-body: 'Inter', 'Calibri', Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  font-weight: 700;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }

/* ---------- Navbar ---------- */
.navbar-bhp {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  box-shadow: var(--shadow-sm);
  padding-top: .85rem;
  padding-bottom: .85rem;
}
.navbar-bhp .navbar-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff !important;
  letter-spacing: .2px;
}
.navbar-bhp .navbar-brand .brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  margin-right: .5rem;
  font-size: 1.1rem;
}
.navbar-bhp .btn-nav-outline {
  border: 1px solid rgba(255,255,255,.55);
  color: #fff;
  background: transparent;
}
.navbar-bhp .btn-nav-outline:hover { background: rgba(255,255,255,.12); color: #fff; }
.navbar-bhp .btn-nav-solid {
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: var(--color-primary-dark);
  font-weight: 600;
}
.navbar-bhp .btn-nav-solid:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: #fff; }

/* ---------- Buttons ---------- */
.btn { border-radius: var(--radius-sm); font-weight: 600; padding: .55rem 1.15rem; }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn-outline-primary { color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline-primary:hover { background: var(--color-primary); border-color: var(--color-primary); }
.btn-accent { background: var(--color-accent); border-color: var(--color-accent); color: #3A2600; font-weight: 700; }
.btn-accent:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: #fff; }
.btn-success { background: var(--color-success); border-color: var(--color-success); }

/* ---------- Layout shell ---------- */
.page-shell { padding-bottom: 4rem; }
.container-narrow { max-width: 900px; margin: 0 auto; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(120deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, #156384 100%);
  color: #fff;
  border-radius: 0 0 28px 28px;
  padding: 3rem 0 3.5rem;
  margin-bottom: -1.75rem;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 85% 20%, rgba(242,169,59,.25), transparent 45%),
                     radial-gradient(circle at 15% 90%, rgba(255,255,255,.08), transparent 40%);
}
.hero .hero-inner { position: relative; z-index: 1; }
.hero h1 { color: #fff; font-size: 2rem; margin-bottom: .5rem; }
.hero p.lead { color: rgba(255,255,255,.85); max-width: 620px; }
.hero-stats { display: flex; gap: 2rem; margin-top: 1.5rem; flex-wrap: wrap; }
.hero-stat .num { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; color: var(--color-accent); }
.hero-stat .label { font-size: .82rem; color: rgba(255,255,255,.75); }

/* ---------- Cards ---------- */
.card { border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.card-elevated { box-shadow: var(--shadow-md); border: none; }

.course-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease;
  background: var(--color-surface);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.course-card .course-cover {
  height: 150px;
  background-size: cover;
  background-position: center;
  background-color: var(--color-primary-light);
  position: relative;
}
.course-card .course-cover::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,55,80,0) 45%, rgba(10,55,80,.55) 100%);
}
.course-card .course-body { padding: 1.1rem 1.25rem 1.25rem; display: flex; flex-direction: column; flex: 1; }
.course-card h3 { font-size: 1.05rem; margin-bottom: .5rem; }

/* ---------- Badges & pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .28rem .65rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}
.pill-accent { background: #FDF0DA; color: var(--color-accent-dark); }
.pill-success { background: var(--color-success-light); color: var(--color-success); }
.pill-warning { background: var(--color-warning-light); color: var(--color-warning); }
.pill-danger { background: var(--color-danger-light); color: var(--color-danger); }
.pill-muted { background: #EEF1F3; color: var(--color-muted); }

/* ---------- Progress ---------- */
.progress-bhp {
  height: 10px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}
.progress-bhp .bar {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-success));
  transition: width .4s ease;
}

/* ---------- Module / lesson list ---------- */
.module-card { border-radius: var(--radius); overflow: hidden; margin-bottom: 1.25rem; border: 1px solid var(--color-border); box-shadow: var(--shadow-sm); }
.module-header {
  display: flex; align-items: center; gap: .75rem;
  padding: .9rem 1.25rem;
  background: var(--color-primary-light);
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary-dark);
}
.module-header .icon-badge {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--color-primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.lesson-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: .85rem 1.25rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: background .12s ease;
}
.lesson-row:hover { background: #FAFBFC; }
.lesson-row .lesson-title { display: flex; align-items: center; gap: .65rem; font-weight: 500; }
.lesson-row .lesson-num {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--color-border); color: var(--color-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: .78rem; font-weight: 700; flex-shrink: 0;
}
.lesson-row.completed .lesson-num { background: var(--color-success); color: #fff; }

/* ---------- Lesson article ---------- */
.lesson-hero {
  height: 220px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  background-color: var(--color-primary-light);
  margin-bottom: 1.5rem;
  position: relative;
}
.lesson-hero::after { content:""; position:absolute; inset:0; border-radius: var(--radius); background: linear-gradient(180deg, rgba(10,55,80,0) 40%, rgba(10,55,80,.6) 100%); }
.lesson-hero .lesson-hero-caption {
  position: absolute; left: 1.5rem; bottom: 1rem; color: #fff;
  font-family: var(--font-heading); font-weight: 700; font-size: 1.1rem;
  z-index: 1;
}
.lesson-article {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 2rem 2.25rem;
}
.lesson-article h4 {
  font-size: 1.15rem;
  margin-top: 1.75rem;
  margin-bottom: .75rem;
  padding-bottom: .4rem;
  border-bottom: 2px solid var(--color-primary-light);
  color: var(--color-primary-dark);
}
.lesson-article h4:first-child { margin-top: 0; }
.lesson-article p { margin-bottom: .9rem; color: #33424B; }
.lesson-article ul { margin-bottom: 1.1rem; padding-left: 1.35rem; }
.lesson-article ul li { margin-bottom: .4rem; }
.lesson-article img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
  box-shadow: var(--shadow-sm);
}
.lesson-article figure { margin: 1.25rem 0; }
.lesson-article figcaption { font-size: .82rem; color: var(--color-muted); margin-top: .4rem; text-align: center; }

/* ---------- Quiz ---------- */
.quiz-question {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.1rem;
  background: var(--color-surface);
}
.quiz-question .q-index {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-weight: 700; font-size: .85rem;
  margin-right: .6rem;
}
.quiz-choice {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: .6rem .9rem;
  margin-bottom: .5rem;
  cursor: pointer;
  transition: border-color .12s ease, background .12s ease;
}
.quiz-choice:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.quiz-choice input { margin-right: .55rem; }

/* ---------- Certificates ---------- */
.certificate-card {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 1.1rem 1.4rem;
  background: linear-gradient(135deg, #fff 60%, var(--color-primary-light) 130%);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  margin-bottom: 1rem;
}
.certificate-card .cert-icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--color-accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
  flex-shrink: 0;
}

/* ---------- Auth pages ---------- */
.auth-shell {
  min-height: calc(100vh - 76px);
  display: flex;
  align-items: center;
}
.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2.25rem 2.25rem;
  border: 1px solid var(--color-border);
}
.auth-card .auth-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--color-primary-light); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
  margin-bottom: 1rem;
}
.auth-side {
  background: linear-gradient(160deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--radius);
  color: #fff;
  padding: 2.5rem 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.auth-side::before { content:""; position:absolute; inset:0; background: linear-gradient(160deg, rgba(10,55,80,.88), rgba(15,76,107,.72)); }
.auth-side > * { position: relative; z-index: 1; }
.auth-side .feature { display: flex; align-items: flex-start; gap: .75rem; margin-bottom: 1.1rem; }
.auth-side .feature .icon { color: var(--color-accent); font-size: 1.2rem; margin-top: .1rem; }

/* form controls */
.form-control, .form-select {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: .6rem .85rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 .2rem rgba(15, 76, 107, .12);
}
label.form-label { font-weight: 600; font-size: .9rem; color: var(--color-ink); }

/* alerts */
.alert { border-radius: var(--radius-sm); border: none; }
.alert-success { background: var(--color-success-light); color: #14603A; }
.alert-danger { background: var(--color-danger-light); color: #8C2A2A; }
.alert-warning { background: var(--color-warning-light); color: #7A5A05; }
.alert-info { background: var(--color-primary-light); color: var(--color-primary-dark); }

/* footer */
.site-footer {
  text-align: center;
  color: var(--color-muted);
  font-size: .85rem;
  padding: 2rem 0 1rem;
}

/* section title with icon */
.section-title { display: flex; align-items: center; gap: .6rem; margin-bottom: 1.25rem; }
.section-title .icon-badge-lg {
  width: 40px; height: 40px; border-radius: 11px;
  background: var(--color-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 1.15rem;
}

@media (max-width: 767px) {
  .hero { border-radius: 0 0 20px 20px; padding: 2.25rem 0 2.5rem; }
  .lesson-article { padding: 1.5rem; }
}