/* ===================================================
   components.css — Reusable UI Components
   Buttons · Forms · Badges · Filter Controls
   Depends on: variables.css
   =================================================== */

/* ── Buttons (base) ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Sizes */
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.btn-sm { padding:  8px 20px; font-size: 0.9rem; }

/* Variants */
.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  box-shadow: 0 4px 14px hsla(24, 100%, 50%, 0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--white);
  color: var(--primary);
  border-color: var(--primary);
}
.btn-white:hover {
  background: var(--off-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Course-specific CTAs */
.btn-enroll {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px hsla(24, 100%, 50%, 0.35);
}
.btn-enroll:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-continue {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-continue:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

/* Completed state – non-interactive */
.btn-completed {
  background: transparent;
  color: hsl(142, 60%, 38%);
  border: 2px solid hsl(142, 60%, 38%);
  cursor: default;
  pointer-events: none;
}

/* Dark-mode button overrides */
body.dark-mode .btn-outline          { color: #f4a96a; border-color: #f4a96a; }
body.dark-mode .btn-outline:hover    { background: #f4a96a; color: #1a1410; }
body.dark-mode .btn-primary          { background: #c96b35; }

/* ── Forms ────────────────────────────────────────── */
.form-container {
  max-width: 450px;
  margin: 0 auto;
  padding: 50px 40px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-group        { margin-bottom: 25px; }

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text);
}

.form-group input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--light-gray);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px hsla(24, 100%, 50%, 0.10);
}

.form-footer {
  text-align: center;
  margin-top: 25px;
  color: var(--text-light);
}

.form-footer a             { color: var(--primary); font-weight: 600; }
.form-footer a:hover       { text-decoration: underline; }

/* Dark-mode form overrides */
body.dark-mode .form-container  { background: var(--off-white); }

body.dark-mode input {
  background: hsl(0, 0%, 12%);
  color: var(--text);
  border-color: var(--light-gray);
}

body.dark-mode input::placeholder { color: var(--gray); }

/* ── Filter controls (courses page) ──────────────── */
.courses-filter {
  padding: 40px 20px;
  background: var(--off-white);
}

.filter-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.filter-btn {
  padding: 10px 25px;
  background: var(--white);
  border: 2px solid var(--light-gray);
  border-radius: var(--radius-full);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}