/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: var(--font-family);
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-zalo {
  background-color: var(--primary);
  color: white;
}

.btn-zalo:hover {
  background-color: var(--primary-dark);
}

@media (max-width: 767px) {
  .btn {
    width: 100%;
    min-height: 44px;
  }

  .form-input,
  .form-select {
    font-size: 16px;
  }
}

/* Cards */
.card {
  background-color: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-sm);
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--charcoal);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(229, 9, 19, 0.1);
}

.form-select {
  width: 100%;
  padding: 12px 16px;
  padding-right: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border 0.2s;
  appearance: none;
  background-color: var(--bg-white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23404040' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 12px 8px;
  cursor: pointer;
}

.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(229, 9, 19, 0.1);
}

/* Badge / Pill */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.badge-dark {
  background-color: var(--charcoal);
  color: white;
}

/* Grid utilities */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

@media (max-width: 1023px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}