@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --bhy-aqua-dark: #134E5E;
  --bhy-aqua-light: #257788;
  --bhy-aqua-subtle: #e6f3f5;
  --bhy-mountain-mist: #EEF2F3;
  --bhy-sand-limestone: #E5DFD3;
  --bhy-sand-light: #F7F5F0;
  --bhy-volcanic-dark: #1C2A39;
  --bhy-volcanic-deep: #121C26;
  --bhy-teal-accent: #38B2AC;
  --bhy-teal-bright: #5eead4;
  --bhy-gold-accent: #C49B5B;
  --bhy-text-dark: #1C2A39;
  --bhy-text-muted: #5A6D80;
  --bhy-border-color: #DDE5E8;
  --bhy-surface-card: #FFFFFF;
  --bhy-surface-glass: rgba(255, 255, 255, 0.92);
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: 'DM Serif Display', Georgia, serif;
  
  --shadow-subtle: 0 4px 20px rgba(19, 78, 94, 0.06);
  --shadow-card: 0 10px 30px rgba(19, 78, 94, 0.08);
  --shadow-float: 0 16px 40px rgba(19, 78, 94, 0.14);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --transition: all 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bhy-sand-light);
  color: var(--bhy-text-dark);
  line-height: 1.68;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, .bhy-serif {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
}

a {
  color: var(--bhy-aqua-dark);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--bhy-teal-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.bhy-container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Nav */
.bhy-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bhy-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--bhy-border-color);
  box-shadow: 0 2px 15px rgba(19, 78, 94, 0.04);
  transition: var(--transition);
}

.bhy-nav_inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.95rem 0;
}

.bhy-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--bhy-aqua-dark);
}

.bhy-brand_logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--bhy-aqua-dark), var(--bhy-teal-accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 10px rgba(19, 78, 94, 0.2);
}

.bhy-brand_text {
  display: flex;
  flex-direction: column;
}

.bhy-brand_title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  letter-spacing: 0.5px;
  color: var(--bhy-aqua-dark);
  line-height: 1;
}

.bhy-brand_tag {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--bhy-teal-accent);
}

.bhy-nav_menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.4rem;
}

.bhy-nav_menu li a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--bhy-volcanic-dark);
  padding: 6px 4px;
  position: relative;
}

.bhy-nav_menu li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--bhy-teal-accent);
  transition: var(--transition);
  border-radius: 2px;
}

.bhy-nav_menu li a:hover::after,
.bhy-nav_menu li a.active::after {
  width: 100%;
}

.bhy-nav_actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bhy-btn_lang {
  background: var(--bhy-mountain-mist);
  border: 1px solid var(--bhy-border-color);
  color: var(--bhy-aqua-dark);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
}

.bhy-btn_lang:hover {
  background: var(--bhy-aqua-dark);
  color: #fff;
  border-color: var(--bhy-aqua-dark);
}

.bhy-cart_link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--bhy-aqua-subtle);
  border-radius: var(--radius-pill);
  color: var(--bhy-aqua-dark);
  transition: var(--transition);
}

.bhy-cart_link:hover {
  background: var(--bhy-aqua-dark);
  color: #fff;
}

.bhy-cart_count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #E53E3E;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #fff;
}

.bhy-nav_toggle {
  display: none;
  background: none;
  border: none;
  color: var(--bhy-aqua-dark);
  cursor: pointer;
  padding: 4px;
}

/* Common Buttons */
.bhy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.96rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

.bhy-btn_primary {
  background: linear-gradient(135deg, var(--bhy-aqua-dark), var(--bhy-aqua-light));
  color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(19, 78, 94, 0.25);
}

.bhy-btn_primary:hover {
  background: linear-gradient(135deg, #0e3b47, var(--bhy-aqua-dark));
  box-shadow: 0 8px 24px rgba(19, 78, 94, 0.35);
  transform: translateY(-2px);
}

.bhy-btn_outline {
  background: transparent;
  color: var(--bhy-aqua-dark) !important;
  border: 1.5px solid var(--bhy-aqua-dark);
}

.bhy-btn_outline:hover {
  background: var(--bhy-aqua-dark);
  color: #ffffff !important;
  transform: translateY(-2px);
}

.bhy-btn_gold {
  background: linear-gradient(135deg, var(--bhy-gold-accent), #a37c3b);
  color: #ffffff !important;
  box-shadow: 0 6px 18px rgba(196, 155, 91, 0.3);
}

.bhy-btn_gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(196, 155, 91, 0.4);
}

.bhy-btn_sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

/* Hero Carousel */
.bhy-hero {
  position: relative;
  background: var(--bhy-volcanic-dark);
  color: #ffffff;
  overflow: hidden;
  min-height: 580px;
  display: flex;
  align-items: center;
}

.bhy-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.bhy-slide {
  display: none;
  padding: 5rem 0;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

.bhy-slide.active {
  display: block;
  opacity: 1;
}

.bhy-slide_bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.22;
  filter: blur(2px);
  transform: scale(1.04);
  transition: transform 6s ease-out;
}

.bhy-slide.active .bhy-slide_bg {
  transform: scale(1);
}

.bhy-hero_content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.bhy-pill_tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(94, 234, 212, 0.15);
  border: 1px solid rgba(94, 234, 212, 0.35);
  color: var(--bhy-teal-bright);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.bhy-hero_title {
  font-size: 3.4rem;
  color: #ffffff;
  margin-bottom: 1.2rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.bhy-hero_lead {
  font-size: 1.18rem;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 2.2rem;
  font-weight: 300;
}

.bhy-hero_actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.bhy-slider_dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.bhy-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.bhy-dot.active {
  width: 32px;
  border-radius: 6px;
  background: var(--bhy-teal-bright);
}

/* Sections */
.bhy-section {
  padding: 5rem 0;
}

.bhy-section_alt {
  background-color: var(--bhy-mountain-mist);
}

.bhy-section_dark {
  background: linear-gradient(135deg, var(--bhy-volcanic-deep), var(--bhy-aqua-dark));
  color: #ffffff;
}

.bhy-sec_header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.bhy-sec_tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--bhy-aqua-dark);
  margin-bottom: 0.5rem;
}

.bhy-section_dark .bhy-sec_tag {
  color: var(--bhy-teal-bright);
}

.bhy-sec_title {
  font-size: 2.5rem;
  color: var(--bhy-volcanic-dark);
  margin-bottom: 0.8rem;
}

.bhy-section_dark .bhy-sec_title {
  color: #ffffff;
}

.bhy-sec_desc {
  font-size: 1.05rem;
  color: var(--bhy-text-muted);
}

.bhy-section_dark .bhy-sec_desc {
  color: #cbd5e1;
}

/* Cards & Grid */
.bhy-grid_3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.bhy-grid_2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 2.5rem;
}

.bhy-card {
  background: var(--bhy-surface-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--bhy-border-color);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.bhy-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: var(--bhy-teal-accent);
}

.bhy-card_body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.bhy-badge {
  display: inline-block;
  background: var(--bhy-aqua-subtle);
  color: var(--bhy-aqua-dark);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 0.9rem;
  width: fit-content;
}

.bhy-badge_accent {
  background: #fef3c7;
  color: #92400e;
}

.bhy-price_tag {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--bhy-aqua-dark);
  margin: 1rem 0;
}

/* Hydro-Cycle DOM Feature Styling */
.bhy-hydro_cycle_box {
  background: var(--bhy-surface-card);
  border: 2px solid var(--bhy-aqua-dark);
  border-radius: var(--radius-lg);
  padding: 2.8rem;
  box-shadow: var(--shadow-float);
  margin-top: 1rem;
}

.bhy-cycle_tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.2rem;
}

.bhy-cycle_tab_btn {
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: 2px solid var(--bhy-border-color);
  background: var(--bhy-sand-light);
  color: var(--bhy-volcanic-dark);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
}

.bhy-cycle_tab_btn.active_warm {
  background: #fff7ed;
  border-color: #ea580c;
  color: #c2410c;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.2);
}

.bhy-cycle_tab_btn.active_cool {
  background: #f0fdfa;
  border-color: var(--bhy-teal-accent);
  color: var(--bhy-aqua-dark);
  box-shadow: 0 4px 14px rgba(56, 178, 172, 0.2);
}

.bhy-cycle_display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  background: var(--bhy-mountain-mist);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-bottom: 2rem;
  align-items: center;
}

.bhy-cycle_capillary_visual {
  text-align: center;
  padding: 1.5rem;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--bhy-border-color);
}

.bhy-capillary_indicator {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  transition: all 0.5s ease;
}

.bhy-indicator_warm {
  background: radial-gradient(circle, #f97316 0%, #ea580c 70%, #9a3412 100%);
  box-shadow: 0 0 25px rgba(249, 115, 22, 0.45);
}

.bhy-indicator_cool {
  background: radial-gradient(circle, #38b2ac 0%, #0d9488 70%, #115e59 100%);
  box-shadow: 0 0 25px rgba(56, 178, 172, 0.45);
}

.bhy-timer_control_box {
  background: var(--bhy-volcanic-dark);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
}

.bhy-timer_display {
  font-size: 3rem;
  font-family: monospace;
  font-weight: 700;
  color: var(--bhy-teal-bright);
  letter-spacing: 2px;
  margin: 0.8rem 0;
}

/* COD Highlight Notice */
.bhy-cod_banner {
  background: #f0fdf4;
  border: 2px solid #86efac;
  border-radius: var(--radius-md);
  padding: 1.4rem 1.8rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.bhy-cod_icon {
  font-size: 2.2rem;
  color: #16a34a;
  flex-shrink: 0;
}

.bhy-cod_text h4 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 800;
  color: #15803d;
  margin-bottom: 4px;
}

.bhy-cod_text p {
  font-size: 0.9rem;
  color: #374151;
  margin: 0;
}

/* Forms */
.bhy-form_group {
  margin-bottom: 1.4rem;
  text-align: left;
}

.bhy-form_group label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--bhy-volcanic-dark);
  margin-bottom: 6px;
}

.bhy-input, .bhy-select, .bhy-textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.96rem;
  border: 1.5px solid var(--bhy-border-color);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--bhy-volcanic-dark);
  transition: var(--transition);
}

.bhy-input:focus, .bhy-select:focus, .bhy-textarea:focus {
  outline: none;
  border-color: var(--bhy-aqua-dark);
  box-shadow: 0 0 0 3px rgba(19, 78, 94, 0.12);
}

/* Modal */
.bhy-modal_backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(18, 28, 38, 0.65);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.bhy-modal_backdrop.open {
  display: flex;
}

.bhy-modal_content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 540px;
  width: 100%;
  padding: 2.4rem;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  animation: modalPop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.92) translateY(15px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.bhy-modal_close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--bhy-mountain-mist);
  border: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bhy-volcanic-dark);
}

/* Footer */
.bhy-footer {
  background: var(--bhy-volcanic-dark);
  color: #cbd5e1;
  padding: 5rem 0 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.bhy-footer_grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.bhy-footer_col h4 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: #ffffff;
  margin-bottom: 1.4rem;
  letter-spacing: 0.5px;
}

.bhy-footer_links {
  list-style: none;
}

.bhy-footer_links li {
  margin-bottom: 0.75rem;
}

.bhy-footer_links li a {
  color: #94a3b8;
  font-size: 0.92rem;
  transition: var(--transition);
}

.bhy-footer_links li a:hover {
  color: var(--bhy-teal-bright);
  padding-left: 4px;
}

.bhy-disclaimer {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  font-size: 0.82rem;
  color: #94a3b8;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.bhy-disclaimer strong {
  color: #e2e8f0;
}

.bhy-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: #64748b;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* Cookie Banner */
.bhy-cookie_banner {
  position: fixed;
  bottom: 20px;
  right: 20px;
  max-width: 440px;
  background: var(--bhy-volcanic-deep);
  color: #e2e8f0;
  padding: 1.4rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  border: 1px solid rgba(94, 234, 212, 0.2);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Responsive */
@media (max-width: 992px) {
  .bhy-hero_title { font-size: 2.6rem; }
  .bhy-footer_grid { grid-template-columns: 1fr 1fr; }
  .bhy-cycle_display { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .bhy-nav_toggle { display: block; }
  .bhy-nav_menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    display: none;
    border-bottom: 2px solid var(--bhy-aqua-dark);
  }
  .bhy-nav_menu.show { display: flex; }
  .bhy-hero_title { font-size: 2.1rem; }
  .bhy-sec_title { font-size: 2rem; }
  .bhy-footer_grid { grid-template-columns: 1fr; }
  .bhy-cookie_banner { left: 20px; right: 20px; max-width: none; }
}