/* ============ Buttons ============
   사용법: <a/button class="btn btn-primary btn-lg">, btn-accent, btn-outline, btn-ghost
   크기: btn-sm / (기본) / btn-lg   상태: disabled 속성 부여 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: var(--fs-body);
  padding: 12px 26px;
  cursor: pointer;
  transition: var(--ease-default);
  line-height: 1.2;
  white-space: nowrap;
}

.btn-sm { padding: 8px 18px; font-size: var(--fs-small); }
.btn-lg { padding: 16px 34px; font-size: var(--fs-body-lg); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { background: var(--color-primary-600); color: var(--color-white); }

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-accent:hover { background: var(--color-accent-600); color: var(--color-white); }

.btn-accent2 {
  background: var(--color-accent2);
  color: var(--color-white);
}
.btn-accent2:hover { background: var(--color-accent2-600); color: var(--color-white); }

.btn-outline {
  background: transparent;
  border-color: var(--color-gray-300);
  color: var(--color-dark);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.4);
  color: var(--color-white);
}
.btn-outline-light:hover { border-color: var(--color-white); background: rgba(255,255,255,0.08); }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding-left: 8px;
  padding-right: 8px;
}
.btn-ghost:hover { color: var(--color-primary-600); }

.btn:disabled, .btn.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-block { width: 100%; }

/* ============ Badges ============ */
.badge-c {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 700;
}
.badge-primary { background: var(--color-primary-100); color: var(--color-primary-700); }
.badge-accent { background: var(--color-accent-100); color: var(--color-accent-600); }
.badge-accent2 { background: var(--color-accent2-100); color: var(--color-accent2-600); }
.badge-dark { background: var(--color-dark-700); color: var(--color-white); }
.badge-success { background: rgba(34,163,102,0.12); color: var(--color-success); }
.badge-outline { background: transparent; border: 1px solid var(--color-gray-300); color: var(--color-gray-600); }

/* ============ Cards ============ */
.card-c {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: var(--ease-default);
}

.card-c.hoverable:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-primary-100);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: var(--space-4);
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.feature-grid .card-c.is-highlight {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-white);
}
.feature-grid .card-c.is-highlight h3 { color: var(--color-white); }
.feature-grid .card-c.is-highlight p { color: rgba(255,255,255,0.65); }
.feature-grid .card-c.is-highlight .card-icon { background: rgba(255,255,255,0.12); color: var(--color-accent); }

@media (max-width: 991.98px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575.98px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ============ Pricing cards ============ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  align-items: stretch;
}

.pricing-card {
  position: relative;
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: var(--ease-default);
}

.pricing-card:hover { border-color: var(--color-primary-100); }

.pricing-card.is-selected,
.pricing-card.is-popular {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.pricing-card.is-selected { background: var(--color-primary-50); }

.pricing-badge {
  position: absolute;
  top: -14px;
  left: var(--space-6);
}

.pricing-name { font-size: var(--fs-h4); font-weight: 800; margin-bottom: var(--space-1); }
.pricing-desc { color: var(--color-gray-500); font-size: var(--fs-small); margin-bottom: var(--space-4); }

.pricing-price {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--space-1);
}
.pricing-price small { font-size: var(--fs-small); font-weight: 600; color: var(--color-gray-500); }
.pricing-note { font-size: var(--fs-xs); color: var(--color-gray-500); margin-bottom: var(--space-5); }

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  flex: 1;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--fs-small);
  border-bottom: 1px dashed var(--color-gray-200);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features i { color: var(--color-primary); margin-top: 3px; }

.pricing-radio {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 20px; height: 20px;
}

@media (max-width: 991.98px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* ============ Category chips (select up to 3) ============ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}

.category-chip {
  position: relative;
}

.category-chip input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
  margin: 0;
}

.category-chip label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-3);
  font-weight: 700;
  font-size: var(--fs-small);
  color: var(--color-dark);
  height: 100%;
  transition: var(--ease-default);
}

.category-chip label i { font-size: 1.4rem; color: var(--color-primary); }

.category-chip input:checked + label {
  border-color: var(--color-primary);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.category-chip input:disabled + label {
  opacity: 0.4;
  cursor: not-allowed;
}

@media (max-width: 767.98px) {
  .category-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============ Process steps ============ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  counter-reset: step;
}

.process-step { position: relative; text-align: center; padding: 0 var(--space-3); }

.process-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  margin: 0 auto var(--space-4);
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 800;
  font-size: var(--fs-h4);
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 24px;
  left: calc(50% + 44px);
  width: calc(100% - 88px);
  border-top: 2px dashed var(--color-gray-300);
}

@media (max-width: 767.98px) {
  .process-steps { grid-template-columns: 1fr; gap: var(--space-6); }
  .process-step:not(:last-child)::after { display: none; }
}

/* ============ Tables ============ */
.table-c {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
}
.table-c th, .table-c td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
  text-align: left;
}
.table-c thead th {
  background: var(--color-gray-50);
  font-weight: 700;
  color: var(--color-gray-700);
}
.table-c tbody tr:hover { background: var(--color-primary-50); }
.table-c .col-highlight { background: var(--color-primary-50); }

.table-scroll { overflow-x: auto; }

/* ============ Forms ============ */
.form-c label {
  display: block;
  font-weight: 700;
  font-size: var(--fs-small);
  margin-bottom: var(--space-2);
}
.form-c .required::after {
  content: "*";
  color: var(--color-accent);
  margin-left: 4px;
}
.form-c .form-control-c,
.form-c textarea.form-control-c,
.form-c select.form-control-c {
  width: 100%;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: var(--fs-body);
  font-family: inherit;
  transition: var(--ease-default);
  background: var(--color-white);
  color: var(--color-dark);
}
.form-c .form-control-c:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}
.form-c .form-control-c.is-invalid { border-color: var(--color-accent); }
.form-c .invalid-feedback-c {
  display: none;
  color: var(--color-accent);
  font-size: var(--fs-xs);
  margin-top: 4px;
}
.form-c .form-control-c.is-invalid ~ .invalid-feedback-c { display: block; }
.form-field { margin-bottom: var(--space-5); }

.form-check-c {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.form-check-c input { width: 18px; height: 18px; accent-color: var(--color-primary); }

/* ============ Accordion (FAQ) ============ */
.accordion-c { border-top: 1px solid var(--color-gray-200); }
.accordion-item-c { border-bottom: 1px solid var(--color-gray-200); }
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-5) var(--space-2);
  font-weight: 700;
  font-size: var(--fs-body-lg);
  cursor: pointer;
  color: var(--color-dark);
}
.accordion-trigger .accordion-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--color-gray-100);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.25s ease;
}
.accordion-item-c.is-open .accordion-icon { transform: rotate(45deg); background: var(--color-primary-100); color: var(--color-primary); }

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.accordion-panel-inner {
  padding: 0 var(--space-2) var(--space-5);
  color: var(--color-gray-600);
}

/* ============ Tabs ============ */
.tabs-c-nav {
  display: flex;
  gap: var(--space-2);
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.tabs-c-nav button {
  background: none;
  border: none;
  padding: var(--space-3) var(--space-5);
  font-weight: 700;
  color: var(--color-gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tabs-c-nav button.active { color: var(--color-primary); border-color: var(--color-primary); }
.tabs-c-panel { display: none; }
.tabs-c-panel.active { display: block; }

/* ============ Layer popup (modal) ============ */
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20,20,26,0.55);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  z-index: 2000;
}
.popup-overlay.is-open { display: flex; }

.popup-box {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  max-width: 460px;
  width: 100%;
  padding: var(--space-8) var(--space-6) var(--space-6);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-md);
  animation: popup-in 0.2s ease;
}

@keyframes popup-in {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.popup-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--color-gray-400);
  cursor: pointer;
}

.popup-icon {
  width: 64px; height: 64px;
  margin: 0 auto var(--space-5);
  border-radius: 50%;
  background: var(--color-primary-100);
  color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}

/* ============ Alerts / toast ============ */
.alert-c {
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
  font-size: var(--fs-small);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}
.alert-info-c { background: var(--color-primary-100); color: var(--color-primary-700); }
.alert-warning-c { background: rgba(242,169,59,0.12); color: #9a6a12; }
.alert-danger-c { background: var(--color-accent-100); color: var(--color-accent-600); }

.toast-c {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  font-size: var(--fs-small);
  font-weight: 600;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 2100;
}
.toast-c.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============ CTA banner ============ */
.cta-banner {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-700) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.cta-banner h2 { color: var(--color-white); margin-bottom: var(--space-2); }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 0; }

/* ============ Media placeholder (쇼츠/트렌드 예시) ============ */
.shorts-mock {
  width: 100%;
  max-width: 260px;
  aspect-ratio: 9 / 16;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-dark-700) 60%, var(--color-primary-700) 130%);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.shorts-mock .play-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 1.5px solid rgba(255,255,255,0.4);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.shorts-mock .shorts-tag {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  font-size: var(--fs-xs);
  font-weight: 700;
  background: var(--color-accent);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}
.shorts-mock .shorts-caption {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.7);
  padding: 0 var(--space-4);
  text-align: center;
}

.trend-mock {
  border-radius: var(--radius-md);
  border: 1.5px dashed var(--color-gray-300);
  background: var(--color-gray-50);
  padding: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.trend-mock i { font-size: 1.6rem; color: var(--color-primary); }

/* Utility */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
@media (max-width: 767.98px) { .grid-2 { grid-template-columns: 1fr; } }