/* =============================================
   solar-power.html 페이지 고유 스타일
   ============================================= */

/* ===== 1. 히어로 ===== */
.solar-hero {
  position: relative;
  background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 50%, #F0F9FF 100%);
  overflow: hidden;
  padding: 40px 0;
  display: flex;
  align-items: center;
}
.solar-hero::before {
  content: ''; position: absolute; top: -40%; right: -15%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(37,99,235,.1) 0%, transparent 65%);
  border-radius: 50%; pointer-events: none;
}
.solar-hero .container { position: relative; z-index: 1; }
.solar-hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.solar-hero-title {
  font-size: 2.75rem; font-weight: 800; line-height: 1.3;
  color: var(--text); margin: 20px 0 16px;
}
.solar-hero-title .accent { color: var(--accent); }
.solar-hero-desc {
  font-size: 1.125rem; color: var(--text-sec); line-height: 1.8; margin-bottom: 24px;
}
.solar-trust-badges {
  display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 32px;
}
.solar-trust-item {
  display: inline-flex; align-items: center;
  padding: 6px 14px; background: var(--accent-light);
  border: 1px solid rgba(37,99,235,.15); border-radius: 100px;
  font-size: .85rem; font-weight: 600; color: var(--text); white-space: nowrap;
}
.solar-hero-buttons {
  display: flex; gap: 12px; flex-wrap: wrap;
}
.solar-hero-cta {
  padding: 16px 48px; font-size: 1.1rem; font-weight: 700;
  border-radius: 10px; box-shadow: 0 4px 24px rgba(37,99,235,.3);
}
.solar-hero-cta svg { width: 20px; height: 20px; }
.solar-hero-visual { position: relative; }
.solar-hero-img {
  width: 100%; border-radius: var(--radius-lg);
  border: 2px solid var(--accent-light); box-shadow: var(--shadow);
}
.hero-wave {
  position: absolute; bottom: -1px; left: 0; width: 100%; line-height: 0;
}
.hero-wave svg { display: block; width: 100%; height: 60px; }

/* ===== 2. 혜택 ===== */
.solar-benefits { background: var(--bg-alt); }
.solar-benefits-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.solar-benefit-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px 24px;
  box-shadow: var(--shadow); text-align: center;
  border-top: 3px solid var(--accent);
  transition: all .3s var(--ease);
}
.solar-benefit-card:hover {
  box-shadow: var(--shadow-hover); transform: translateY(-4px);
}
.solar-benefit-icon {
  font-size: 2rem; margin-bottom: 16px;
}
.solar-benefit-card h3 {
  font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 8px;
}
.solar-benefit-card p {
  font-size: .9rem; color: var(--text-sec); line-height: 1.6;
}

/* ===== 3. 설치 유형 ===== */
.solar-types { background: var(--bg); }
.solar-types-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.solar-type-card {
  background: #fff; border: 1px solid rgba(0,0,0,.06);
  border-radius: var(--radius-lg); padding: 32px 24px;
  box-shadow: var(--shadow); text-align: center;
  transition: all .3s var(--ease);
}
.solar-type-card:hover {
  box-shadow: var(--shadow-hover); transform: translateY(-4px);
  border-color: rgba(37,99,235,.25);
}
.solar-type-icon { font-size: 2rem; margin-bottom: 12px; }
.solar-type-card h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 8px;
}
.solar-type-spec {
  display: inline-block; padding: 4px 12px;
  background: var(--accent-light); color: var(--accent);
  font-size: .8rem; font-weight: 600; border-radius: 100px; margin-bottom: 8px;
}
.solar-type-card p {
  font-size: .9rem; color: var(--text-sec); line-height: 1.5;
}
.solar-type-img {
  width: 100%; height: 120px; object-fit: cover;
  border-radius: var(--radius-md); margin-top: 16px;
}

/* ===== 4. 비용 및 보조금 ===== */
.solar-pricing { background: var(--accent-light); }
.solar-pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.solar-price-card {
  background: #fff; border: 2px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px 28px;
  box-shadow: var(--shadow); transition: all .3s var(--ease);
  position: relative;
}
.solar-price-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.solar-price-card.popular {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(37,99,235,.3);
}
.solar-price-card.popular:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37,99,235,.4);
}
.popular-badge {
  position: absolute; top: -12px; right: 24px;
  background: #F59E0B; color: var(--text); padding: 6px 16px;
  border-radius: 100px; font-size: .8rem; font-weight: 700;
}
.solar-price-card h3 {
  font-size: 1.25rem; font-weight: 700; margin-bottom: 24px;
}
.solar-price-card ul {
  list-style: none; padding: 0; margin: 0 0 24px;
}
.solar-price-card ul li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0; border-bottom: 1px solid rgba(0,0,0,.06);
  font-size: .95rem;
}
.solar-price-card.popular ul li {
  border-bottom-color: rgba(255,255,255,.15);
}
.price-label { color: var(--text-sec); font-weight: 500; }
.solar-price-card.popular .price-label { color: rgba(255,255,255,.7); }
.price-value { font-weight: 700; }
.price-value.highlight { color: var(--accent); }
.solar-price-card.popular .price-value.highlight { color: #93C5FD; }
.solar-price-cta {
  display: block; text-align: center; padding: 16px;
  border-radius: var(--radius-md); font-weight: 700; font-size: 1rem;
  transition: all .2s var(--ease);
  background: var(--accent-light); color: var(--accent);
}
.solar-price-cta:hover { background: var(--accent); color: #fff; }
.solar-price-card.popular .solar-price-cta {
  background: #fff; color: var(--accent);
}
.solar-price-card.popular .solar-price-cta:hover {
  background: #DBEAFE;
}
.solar-pricing-notes {
  text-align: center; margin-top: 24px;
}
.solar-pricing-notes p {
  font-size: .9rem; color: var(--text-sec); margin: 4px 0;
}

/* ===== 5. 프로세스 ===== */
.solar-process { background: var(--bg); }
.solar-process-track {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px;
  position: relative;
}
.solar-process-track::before {
  content: ''; position: absolute; top: 36px; left: 8%; right: 8%;
  height: 2px;
  background: linear-gradient(90deg, rgba(37,99,235,.3), rgba(37,99,235,.1));
}
.solar-proc-step { text-align: center; position: relative; z-index: 1; }
.solar-proc-num {
  width: 56px; height: 56px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff; border-radius: 50%;
  font-size: 1.25rem; font-weight: 800;
  box-shadow: 0 4px 16px rgba(37,99,235,.25);
}
.solar-proc-step h3 {
  font-size: .95rem; font-weight: 700; color: var(--text); margin-bottom: 4px;
}
.solar-proc-step p {
  font-size: .8rem; color: var(--text-sec); line-height: 1.5;
}

/* ===== 6. FAQ ===== */
.solar-faq { background: var(--bg-alt); }
.solar-faq-list { max-width: 760px; margin: 0 auto; }
.solar-faq-item {
  background: #fff; border-radius: var(--radius-md); margin-bottom: 12px;
  box-shadow: var(--shadow); overflow: hidden;
}
.solar-faq-q {
  width: 100%; padding: 20px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  background: none; border: none; cursor: pointer;
  font-size: 1rem; font-weight: 600; color: var(--text); text-align: left;
}
.solar-faq-q .arrow {
  font-size: 1.25rem; color: var(--accent);
  transition: transform .3s; flex-shrink: 0;
}
.solar-faq-item.open .solar-faq-q .arrow { transform: rotate(180deg); }
.solar-faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.solar-faq-a-inner {
  padding: 0 24px 20px; font-size: .95rem;
  color: var(--text-sec); line-height: 1.7;
}

/* ===== 7. 전기요금 절감 계산기 ===== */
.solar-calc { background: var(--bg-alt); }
.solar-calc-input {
  display: flex; gap: 12px; justify-content: center; align-items: center;
  max-width: 480px; margin: 0 auto;
}
.solar-calc-field {
  display: flex; align-items: center; flex: 1;
  background: #fff; border: 2px solid var(--border); border-radius: var(--radius-md);
  overflow: hidden; transition: border-color .2s;
}
.solar-calc-field:focus-within { border-color: var(--accent); }
.solar-calc-field input {
  flex: 1; border: none; outline: none; padding: 14px 16px;
  font-size: 1.1rem; font-weight: 600; color: var(--text);
  min-width: 0;
}
.solar-calc-field input::placeholder { color: #9ca3af; font-weight: 400; }
.solar-calc-unit {
  padding: 0 16px; font-size: .9rem; font-weight: 600; color: var(--text-sec);
  white-space: nowrap;
}
.solar-calc-btn { white-space: nowrap; padding: 14px 28px; font-size: 1rem; }

/* ===== 계산기 결과 ===== */
.solar-calc-result { margin-top: 40px; }

/* 상단: 현재 전기요금 카드 (전체 너비) */
.solar-calc-current {
  background: #fff; border: 2px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow); text-align: center;
}
.solar-calc-current h3 {
  font-size: 1rem; font-weight: 600; color: var(--text-sec); margin-bottom: 20px;
}
.solar-calc-current-row {
  display: flex; justify-content: center; gap: 48px;
}
.solar-calc-current-item { display: flex; flex-direction: column; gap: 4px; }
.solar-calc-current-item .label { font-size: .85rem; color: var(--text-sec); }
.solar-calc-current-item .val { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.solar-calc-current-item .val.big { font-size: 1.6rem; font-weight: 800; color: var(--text); }

/* 화살표 연결 */
.solar-calc-arrow {
  text-align: center; padding: 20px 0; font-size: .95rem;
  font-weight: 600; color: var(--accent);
}

/* 하단: 2개 비교 카드 */
.solar-calc-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}
.solar-calc-card {
  background: #fff; border: 2px solid var(--accent);
  border-radius: var(--radius-lg); padding: 32px 24px;
  box-shadow: var(--shadow); position: relative;
}
.solar-calc-badge {
  position: absolute; top: -12px; right: 20px;
}
.solar-calc-card h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 12px;
}
.solar-calc-bill {
  font-size: 1.8rem; font-weight: 800; color: var(--text); margin-bottom: 8px;
}
.solar-calc-bill span { font-size: .9rem; font-weight: 600; margin-left: 4px; }
.solar-calc-save {
  display: inline-block; padding: 6px 16px; margin-bottom: 20px;
  background: var(--accent); color: #fff;
  font-size: 1rem; font-weight: 700; border-radius: 100px;
}
.solar-calc-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid rgba(0,0,0,.05);
  font-size: .9rem; color: var(--text-sec);
}
.solar-calc-row:last-child { border-bottom: none; }
.solar-calc-row span:last-child { font-weight: 600; color: var(--text); }
.solar-calc-row.highlight span { color: var(--accent); font-weight: 700; }
/* ===== 추천 등급 스타일 ===== */
.solar-calc-card.grade-best { border-color: #2563EB; background: #EFF6FF; }
.solar-calc-card.grade-good { border-color: #16A34A; background: #F0FDF4; }
.solar-calc-card.grade-normal { border-color: #D97706; background: #FFFBEB; }
.solar-calc-card.grade-danger { border-color: #EF4444; background: #FEF2F2; }
.grade-icon {
  display: inline-block; padding: 2px 10px; border-radius: 100px;
  font-size: .75rem; font-weight: 700; color: #fff;
}
.grade-icon.best { background: #2563EB; }
.grade-icon.good { background: #16A34A; }
.grade-icon.normal { background: #D97706; }
.grade-icon.danger { background: #EF4444; }
.solar-calc-rec {
  margin-top: 16px; padding: 16px; border-radius: var(--radius-md);
}
.solar-calc-rec strong { font-size: 1rem; color: var(--text); display: block; margin-bottom: 4px; }
.solar-calc-rec p { font-size: .85rem; color: var(--text-sec); line-height: 1.5; margin: 0; }
.solar-calc-rec .rec-detail { font-size: .8rem; margin-top: 4px; }
.grade-bg-best { background: rgba(37,99,235,.08); }
.grade-bg-good { background: rgba(22,163,74,.08); }
.grade-bg-normal { background: rgba(217,119,6,.08); }
.grade-bg-danger { background: rgba(239,68,68,.08); }

.solar-calc-notes {
  text-align: center; margin-top: 24px;
}
.solar-calc-notes p {
  font-size: .8rem; color: var(--text-sec); margin: 4px 0; line-height: 1.6;
}

/* ===== 반응형 ===== */
@media (max-width: 1024px) {
  .solar-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .solar-hero-visual { order: -1; max-width: 480px; margin: 0 auto; }
  .solar-benefits-grid, .solar-types-grid { grid-template-columns: repeat(2, 1fr); }
  .solar-pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .solar-pricing-grid .solar-price-card:last-child {
    grid-column: 1 / -1; max-width: 50%; margin: 0 auto;
  }
  .solar-process-track { grid-template-columns: repeat(3, 1fr); }
  .solar-process-track::before { display: none; }
}
@media (max-width: 768px) {
  .solar-hero { padding: 32px 0 40px; }
  .solar-hero-grid { text-align: center; }
  .solar-hero-title { font-size: 2rem; }
  .solar-hero-buttons { justify-content: center; flex-direction: column; }
  .solar-hero-buttons .btn { width: 100%; max-width: 320px; margin: 0 auto; }
  .solar-trust-badges { justify-content: center; }
  .solar-benefits-grid, .solar-types-grid { grid-template-columns: 1fr; }
  .solar-pricing-grid { grid-template-columns: 1fr; }
  .solar-pricing-grid .solar-price-card:last-child { max-width: 100%; }
  .solar-process-track { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .solar-calc-input { flex-direction: column; }
  .solar-calc-btn { width: 100%; }
  .solar-calc-current { padding: 24px 20px; }
  .solar-calc-current-row { flex-direction: column; gap: 16px; align-items: center; }
  .solar-calc-current-item .val.big { font-size: 1.4rem; }
  .solar-calc-compare { grid-template-columns: 1fr; }
  .solar-calc-bill { font-size: 1.5rem; }
}
@media (max-width: 480px) {
  .solar-hero-title { font-size: 1.75rem; }
  .solar-process-track { grid-template-columns: 1fr; }
  .solar-benefit-card, .solar-type-card, .solar-price-card { padding: 24px 20px; }
}