@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================================
   CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
  --color-primary: #204878;
  --color-primary-hover: #3a6ea8;
  --color-primary-dark: #000c24;
  --color-primary-light: #4a7ab5;
  --color-primary-bg: rgba(32, 72, 120, 0.08);
  --color-primary-bg-hover: rgba(32, 72, 120, 0.14);
  --color-black: #000c24;
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2d2d2d;
  --color-gray-700: #404040;
  --color-gray-600: #555555;
  --color-gray-500: #988F8E;
  --color-gray-400: #a0a0a0;
  --color-gray-300: #c4c4c4;
  --color-gray-200: #e0e0e0;
  --color-gray-100: #F0F0F0;
  --color-gray-50: #F5F5F5;
  --color-white: #FFFFFF;
  --color-success: #2E7D32;
  --color-success-bg: rgba(46, 125, 50, 0.1);
  --color-warning: #E65100;
  --color-warning-bg: rgba(230, 81, 0, 0.1);
  --color-danger: #C62828;
  --color-danger-bg: rgba(198, 40, 40, 0.1);
  --color-info: #1565C0;
  --color-info-bg: rgba(21, 101, 192, 0.1);
  --font-family: 'Montserrat', sans-serif;
  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.75rem;
  --font-size-base: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 1.75rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
  --shadow-card-hover: 0 8px 25px rgba(32,72,120,0.15), 0 4px 10px rgba(0,0,0,0.08);
  --header-height: 72px;
  --sidebar-width: 260px;
  --summary-width: 360px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-family); font-size: var(--font-size-base); color: var(--color-gray-900); background-color: var(--color-gray-50); line-height: 1.5; overflow-x: hidden; }
a { color: var(--color-primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; font-size: inherit; }
img { max-width: 100%; display: block; }

/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; height: var(--header-height); background: var(--color-black); color: var(--color-white); z-index: 1000; display: flex; align-items: center; padding: 0 var(--space-8); box-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.header__logo { display: flex; align-items: center; gap: var(--space-4); font-weight: 800; font-size: var(--font-size-lg); letter-spacing: -0.02em; white-space: nowrap; }
.header__logo-img { height: 48px; width: auto; object-fit: contain; }
.header__logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.header__logo-brand { font-size: var(--font-size-xs); color: var(--color-gray-400); font-weight: 600; text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 2px; }
.header__logo-app { font-size: 1.125rem; font-weight: 800; color: var(--color-white); letter-spacing: -0.01em; }
.header__center { flex: 1; display: flex; align-items: center; justify-content: center; gap: var(--space-4); }
.header__specs-bar { display: flex; align-items: center; gap: var(--space-8); background: rgba(255,255,255,0.04); border-radius: var(--radius-xl); padding: var(--space-3) var(--space-8); border: 1px solid rgba(255,255,255,0.08); }
.header__spec { display: flex; align-items: center; gap: var(--space-3); font-size: var(--font-size-sm); color: var(--color-gray-400); }
.header__spec-value { font-weight: 700; color: var(--color-white); font-size: var(--font-size-md); font-variant-numeric: tabular-nums; }
.header__spec-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.7; }
.header__right { display: flex; align-items: center; gap: var(--space-4); }
.header__compat-badge { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-6); border-radius: var(--radius-xl); font-size: var(--font-size-sm); font-weight: 700; transition: var(--transition-base); text-transform: uppercase; letter-spacing: 0.05em; }
.header__compat-badge[data-status="compatible"] { background: var(--color-success-bg); color: var(--color-success); border: 1px solid rgba(46,125,50,0.3); }
.header__compat-badge[data-status="marginal"] { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid rgba(230,81,0,0.3); }
.header__compat-badge[data-status="incompatible"] { background: var(--color-danger-bg); color: var(--color-danger); border: 1px solid rgba(198,40,40,0.3); animation: pulse-danger 2s ease-in-out infinite; }
.header__compat-badge[data-status="neutral"] { background: rgba(255,255,255,0.06); color: var(--color-gray-400); border: 1px solid rgba(255,255,255,0.1); }
.btn-mobile-menu, .btn-mobile-summary { display: none; width: 44px; height: 44px; border-radius: var(--radius-md); color: var(--color-white); align-items: center; justify-content: center; font-size: 1.5rem; transition: var(--transition-fast); }
.btn-mobile-menu:hover, .btn-mobile-summary:hover { background: rgba(255,255,255,0.1); }

/* Disclaimer Banner */
.disclaimer-banner {
  background: #fff8e1;
  border-bottom: 1px solid #ffe082;
  padding: var(--space-2) var(--space-8);
  font-size: 11px;
  color: #795548;
  line-height: 1.5;
  position: sticky;
  top: var(--header-height);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.disclaimer-banner strong { color: #5d4037; font-weight: 700; }

.disclaimer-banner__content {
  flex: 1;
  text-align: center;
  transition: all 0.3s ease;
  overflow: hidden;
}

.disclaimer-banner.collapsed {
  padding-top: var(--space-1.5);
  padding-bottom: var(--space-1.5);
}

.disclaimer-banner.collapsed .disclaimer-banner__content {
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
}

.disclaimer-banner__toggle {
  background: rgba(121, 85, 72, 0.08);
  border: 1px solid rgba(121, 85, 72, 0.15);
  font-size: 10px;
  color: #795548;
  cursor: pointer;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.disclaimer-banner__toggle:hover {
  background: rgba(121, 85, 72, 0.15);
  color: #5d4037;
}

.disclaimer-banner.collapsed .disclaimer-banner__toggle {
  transform: rotate(180deg);
}

/* Layout */
.app-layout { display: grid; grid-template-columns: var(--sidebar-width) 1fr var(--summary-width); min-height: 100vh; padding-top: var(--header-height); transition: grid-template-columns var(--transition-base); }
.app-layout.sidebar-collapsed { grid-template-columns: 60px 1fr var(--summary-width); }
.app-layout.summary-collapsed { grid-template-columns: var(--sidebar-width) 1fr 0px; }
.app-layout.sidebar-collapsed.summary-collapsed { grid-template-columns: 60px 1fr 0px; }

/* Sidebar */
.sidebar { position: sticky; top: calc(var(--header-height) + 40px); height: calc(100vh - var(--header-height) - 40px); overflow-y: auto; background: var(--color-white); border-right: 1px solid var(--color-gray-200); padding: var(--space-6) 0; scrollbar-width: thin; scrollbar-color: var(--color-gray-300) transparent; transition: var(--transition-base); }
.sidebar-collapsed .sidebar { padding: var(--space-6) 0; }
.sidebar-collapsed .sidebar__title, 
.sidebar-collapsed .category-nav__name, 
.sidebar-collapsed .category-nav__badge,
.sidebar-collapsed .presets-section,
.sidebar-collapsed .filters { display: none; }
.sidebar-collapsed .category-nav__item { justify-content: center; padding: var(--space-4) 0; }
.sidebar-collapsed .category-nav__icon { font-size: 1.5rem; width: auto; margin: 0; }

.panel-toggle { position: absolute; top: var(--space-2); right: var(--space-2); width: 32px; height: 32px; border-radius: var(--radius-sm); background: var(--color-gray-100); display: flex; align-items: center; justify-content: center; font-size: 0.75rem; color: var(--color-gray-600); z-index: 20; transition: var(--transition-fast); }
.panel-toggle:hover { background: var(--color-gray-200); color: var(--color-gray-900); }
.sidebar-collapsed .panel-toggle { right: 50%; transform: translateX(50%); }

/* Summary */
.summary { position: sticky; top: calc(var(--header-height) + 40px); height: calc(100vh - var(--header-height) - 40px); overflow-y: auto; background: var(--color-white); border-left: 1px solid var(--color-gray-200); display: flex; flex-direction: column; scrollbar-width: thin; scrollbar-color: var(--color-gray-300) transparent; box-shadow: -4px 0 20px rgba(0,0,0,0.02); transition: var(--transition-base); overflow-x: hidden; }
.summary-collapsed .summary { transform: translateX(100%); width: 0; border-left: none; }
.sidebar__title { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-gray-500); padding: 0 var(--space-6); margin-bottom: var(--space-3); }
.category-nav { list-style: none; margin-bottom: var(--space-8); }
.category-nav__item { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-4) var(--space-6); cursor: pointer; transition: var(--transition-fast); position: relative; font-size: var(--font-size-base); font-weight: 500; color: var(--color-gray-700); user-select: none; }
.category-nav__item:hover { background: var(--color-gray-50); color: var(--color-gray-900); }
.category-nav__item--active { background: var(--color-primary-bg); color: var(--color-primary); font-weight: 700; border-right: 3px solid var(--color-primary); }
.category-nav__item--active:hover { background: var(--color-primary-bg-hover); }
.category-nav__icon { font-size: 1.25rem; width: 28px; text-align: center; flex-shrink: 0; }
.category-nav__name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.category-nav__badge { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.category-nav__badge--selected { background: var(--color-success); box-shadow: 0 0 0 4px var(--color-success-bg); }
.category-nav__badge--required { border: 2px solid var(--color-gray-300); width: 8px; height: 8px; }

/* Presets */
.presets-section { padding: 0 var(--space-4); margin-bottom: var(--space-8); }
.preset-card { padding: var(--space-4); border-radius: var(--radius-lg); border: 1px solid var(--color-gray-200); cursor: pointer; transition: var(--transition-base); margin-bottom: var(--space-3); background: var(--color-white); }
.preset-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.preset-card__header { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.preset-card__icon { font-size: 1.25rem; }
.preset-card__name { font-weight: 700; font-size: var(--font-size-sm); color: var(--color-gray-900); }
.preset-card__desc { font-size: 11px; color: var(--color-gray-500); line-height: 1.5; }
.preset-card__price { font-size: 12px; color: var(--color-primary); font-weight: 800; margin-top: var(--space-2); text-transform: uppercase; letter-spacing: 0.05em; }

/* Filters */
.filters { padding: 0 var(--space-6); }
.filter-group { margin-bottom: var(--space-6); }
.filter-group__label { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-gray-600); margin-bottom: var(--space-3); display: block; }
.filter-group__select, .filter-group__input { width: 100%; padding: var(--space-3) var(--space-4); border: 1px solid var(--color-gray-200); border-radius: var(--radius-md); font-family: inherit; font-size: var(--font-size-sm); color: var(--color-gray-900); background: var(--color-white); transition: var(--transition-fast); outline: none; }
.filter-group__select:focus, .filter-group__input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 4px var(--color-primary-bg); }
.tier-toggle { display: flex; gap: 4px; background: var(--color-gray-100); border-radius: var(--radius-md); padding: 4px; }
.tier-toggle__btn { flex: 1; padding: var(--space-2); border-radius: calc(var(--radius-md) - 4px); font-size: 11px; font-weight: 700; color: var(--color-gray-600); transition: var(--transition-fast); text-align: center; text-transform: uppercase; letter-spacing: 0.05em; }
.tier-toggle__btn:hover { color: var(--color-gray-900); }
.tier-toggle__btn--active { background: var(--color-white); color: var(--color-primary); font-weight: 800; box-shadow: var(--shadow-sm); }

/* Main Content */
.main-content { padding: var(--space-8); background: var(--color-gray-50); min-height: calc(100vh - var(--header-height)); }
.main-content__header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: var(--space-8); border-bottom: 2px solid var(--color-gray-200); padding-bottom: var(--space-4); }
.main-content__title { font-size: var(--font-size-2xl); font-weight: 900; color: var(--color-gray-900); letter-spacing: -0.02em; }
.main-content__subtitle { font-size: var(--font-size-md); color: var(--color-gray-500); margin-top: var(--space-1); font-weight: 500; }
.main-content__count { font-size: var(--font-size-sm); color: var(--color-gray-400); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; }

/* Product Grid */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--space-6); }
.product-card { background: var(--color-white); border-radius: var(--radius-lg); border: 2px solid var(--color-white); overflow: hidden; transition: var(--transition-base); cursor: pointer; position: relative; display: flex; flex-direction: column; box-shadow: var(--shadow-md); animation: slide-up 400ms ease both; }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-gray-200); }
.product-card--selected { border-color: var(--color-primary); box-shadow: var(--shadow-card-hover); }
.product-card__selected-badge { position: absolute; top: var(--space-4); right: var(--space-4); width: 32px; height: 32px; border-radius: 50%; background: var(--color-primary); color: var(--color-white); display: flex; align-items: center; justify-content: center; font-size: 1.125rem; font-weight: 800; z-index: 2; box-shadow: 0 4px 12px rgba(32,72,120,0.4); opacity: 0; transform: scale(0.5); transition: var(--transition-base); }
.product-card--selected .product-card__selected-badge { opacity: 1; transform: scale(1); }
.product-card__image { width: 100%; height: 220px; background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.product-card__image img { width: 85%; height: 85%; object-fit: contain; padding: var(--space-4); mix-blend-mode: multiply; transition: var(--transition-base); }
.product-card:hover .product-card__image img { transform: scale(1.05); }
.product-card__image-placeholder { font-size: 4rem; user-select: none; opacity: 0.2; filter: grayscale(100%); }
.product-card__tier { position: absolute; top: var(--space-4); left: var(--space-4); padding: 4px var(--space-3); border-radius: var(--radius-sm); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.1em; box-shadow: var(--shadow-sm); }
.product-card__tier--residential { background: #e3f2fd; color: #1565c0; }
.product-card__tier--professional { background: #fff3e0; color: #e65100; }
.product-card__body { flex: 1; padding: var(--space-6); display: flex; flex-direction: column; }
.product-card__brand { font-size: 11px; font-weight: 800; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: var(--space-2); }
.product-card__name { font-size: var(--font-size-md); font-weight: 700; color: var(--color-gray-900); line-height: 1.4; margin-bottom: var(--space-4); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; height: 2.8em; }
.product-card__specs { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-6); }
.product-card__spec-tag { padding: 4px var(--space-3); background: var(--color-gray-50); border-radius: var(--radius-sm); font-size: 11px; font-weight: 600; color: var(--color-gray-600); border: 1px solid var(--color-gray-200); }
.product-card__footer { margin-top: auto; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--color-gray-100); padding-top: var(--space-4); }
.product-card__rating { display: flex; align-items: center; gap: var(--space-2); font-size: 12px; font-weight: 600; color: var(--color-gray-500); }
.product-card__stars { color: #F59E0B; font-size: 1rem; }
.product-card__add-btn { padding: var(--space-4); background: var(--color-primary); color: var(--color-white); border-radius: var(--radius-md); font-size: var(--font-size-sm); font-weight: 800; transition: var(--transition-base); margin-top: var(--space-4); text-align: center; width: 100%; text-transform: uppercase; letter-spacing: 0.05em; }
.product-card__add-btn:hover { background: var(--color-primary-hover); }
.product-card--selected .product-card__add-btn { background: var(--color-gray-800); }

/* Summary */
.summary { position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height)); overflow-y: auto; background: var(--color-white); border-left: 1px solid var(--color-gray-200); display: flex; flex-direction: column; scrollbar-width: thin; scrollbar-color: var(--color-gray-300) transparent; box-shadow: -4px 0 20px rgba(0,0,0,0.02); }
.summary__header { padding: var(--space-6); border-bottom: 1px solid var(--color-gray-100); display: flex; align-items: center; justify-content: space-between; }
.summary__title { font-size: var(--font-size-lg); font-weight: 900; color: var(--color-gray-900); letter-spacing: -0.01em; }
.summary__clear { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--color-gray-400); cursor: pointer; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); transition: var(--transition-fast); }
.summary__clear:hover { background: var(--color-danger-bg); color: var(--color-danger); }
.summary__items { flex: 1; padding: var(--space-4) var(--space-6); overflow-y: auto; }
.summary-item { display: flex; align-items: flex-start; gap: var(--space-4); padding: var(--space-4); border-radius: var(--radius-lg); margin-bottom: var(--space-3); transition: var(--transition-fast); border: 1px solid transparent; position: relative; }
.summary-item:hover { background: var(--color-gray-50); }
.summary-item--filled { background: #f8f9fa; border-color: var(--color-gray-200); }
.summary-item--empty { opacity: 0.6; cursor: pointer; border: 1px dashed var(--color-gray-300); }
.summary-item__icon { width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--color-gray-100); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; flex-shrink: 0; transition: var(--transition-base); }
.summary-item--filled .summary-item__icon { background: var(--color-primary); color: var(--color-white); }
.summary-item__content { flex: 1; min-width: 0; }
.summary-item__category { font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-gray-500); margin-bottom: 2px; }
.summary-item__name { font-size: var(--font-size-sm); font-weight: 700; color: var(--color-gray-900); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.summary-item__remove { position: absolute; top: var(--space-2); right: var(--space-2); width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--color-gray-400); opacity: 0; transition: var(--transition-fast); }
.summary-item:hover .summary-item__remove { opacity: 1; }
.summary-item__remove:hover { background: var(--color-danger-bg); color: var(--color-danger); }

/* Compatibility Summary */
.summary__compat { padding: var(--space-6); background: #fcfcfc; border-top: 1px solid var(--color-gray-100); }
.compat-check { display: flex; align-items: flex-start; gap: var(--space-3); padding: var(--space-3) 0; font-size: 12px; font-weight: 500; color: var(--color-gray-600); line-height: 1.5; }
.compat-check__icon { flex-shrink: 0; font-size: 1rem; margin-top: 2px; }

/* Summary Footer */
.summary__footer { padding: var(--space-6); border-top: 2px solid var(--color-gray-100); background: var(--color-white); }
.summary__total { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: var(--space-6); }
.summary__total-label { font-size: var(--font-size-md); font-weight: 700; color: var(--color-gray-500); text-transform: uppercase; letter-spacing: 0.05em; padding-bottom: 4px; }
.summary__total-price { font-size: 2.25rem; font-weight: 900; color: var(--color-gray-900); letter-spacing: -0.03em; }
.btn-save-build { width: 100%; padding: var(--space-5); background: var(--color-primary); color: var(--color-white); border-radius: var(--radius-lg); font-size: 1.125rem; font-weight: 800; transition: var(--transition-base); display: flex; align-items: center; justify-content: center; gap: var(--space-3); letter-spacing: 0.02em; text-transform: uppercase; box-shadow: 0 8px 20px rgba(32,72,120,0.3); }
.btn-save-build:hover { background: var(--color-primary-hover); transform: translateY(-2px); box-shadow: 0 12px 25px rgba(32,72,120,0.4); }

/* Animations */
@keyframes pulse-danger { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.8; transform: scale(1.02); } }
@keyframes slide-up { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; z-index: 2000; opacity: 0; pointer-events: none; transition: var(--transition-base); }
.modal-overlay--visible { opacity: 1; pointer-events: auto; }
.modal { background: var(--color-white); width: 90%; max-width: 700px; max-height: 90vh; border-radius: var(--radius-xl); overflow-y: auto; box-shadow: var(--shadow-xl); transform: translateY(20px); transition: var(--transition-base); position: relative; }
.modal-overlay--visible .modal { transform: translateY(0); }
.modal__header { padding: var(--space-8) var(--space-8) var(--space-4); display: flex; align-items: flex-start; justify-content: space-between; position: sticky; top: 0; background: var(--color-white); z-index: 10; border-bottom: 1px solid var(--color-gray-100); }
.modal__brand { font-size: 12px; font-weight: 800; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: var(--space-1); }
.modal__title { font-size: var(--font-size-xl); font-weight: 900; color: var(--color-gray-900); line-height: 1.2; }
.modal__close { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; color: var(--color-gray-400); transition: var(--transition-fast); }
.modal__close:hover { background: var(--color-gray-100); color: var(--color-gray-900); }
.modal__body { padding: var(--space-8); }
.modal__desc { font-size: var(--font-size-md); color: var(--color-gray-600); line-height: 1.6; margin-bottom: var(--space-8); }
.modal__specs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-6); margin-bottom: var(--space-8); background: var(--color-gray-50); padding: var(--space-6); border-radius: var(--radius-lg); }
.modal__spec-label { font-size: 11px; font-weight: 800; color: var(--color-gray-500); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 2px; }
.modal__spec-value { font-size: var(--font-size-base); font-weight: 700; color: var(--color-gray-900); }
.modal__footer { padding: var(--space-8); border-top: 1px solid var(--color-gray-100); display: flex; align-items: center; justify-content: space-between; position: sticky; bottom: 0; background: var(--color-white); z-index: 10; }
.modal__add-btn { padding: var(--space-4) var(--space-8); background: var(--color-primary); color: var(--color-white); border-radius: var(--radius-md); font-weight: 800; transition: var(--transition-base); text-transform: uppercase; letter-spacing: 0.05em; }
.modal__add-btn:hover { background: var(--color-primary-hover); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(32,72,120,0.3); }

/* Toast */
.toast-container { position: fixed; bottom: var(--space-8); left: 50%; transform: translateX(-50%); z-index: 3000; display: flex; flex-direction: column; gap: var(--space-3); pointer-events: none; }
.toast { padding: var(--space-4) var(--space-8); border-radius: var(--radius-xl); background: var(--color-black); color: var(--color-white); font-weight: 700; font-size: var(--font-size-sm); box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: var(--space-3); animation: toast-in 400ms cubic-bezier(0.18, 0.89, 0.32, 1.28) both; pointer-events: auto; }
.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-danger); }
.toast--info { background: var(--color-primary); }
@keyframes toast-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive Adjustments */
@media (max-width: 1024px) {
  .app-layout { grid-template-columns: 1fr; }
  .header { padding: 0 var(--space-4); }
  .header__specs-bar { display: none; }
  .sidebar, .summary { position: fixed; top: var(--header-height); bottom: 0; width: 320px; z-index: 1100; transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: var(--shadow-xl); }
  .sidebar { left: 0; transform: translateX(-100%); }
  .sidebar--open { transform: translateX(0); }
  .summary { right: 0; transform: translateX(100%); }
  .summary--open { transform: translateX(0); }
  .btn-mobile-menu, .btn-mobile-summary { display: flex; }
  .overlay-backdrop { position: fixed; inset: 0; top: var(--header-height); background: rgba(0,0,0,0.5); z-index: 1050; display: none; backdrop-filter: blur(4px); }
  .overlay-backdrop--visible { display: block; }
}

@media (max-width: 640px) {
  .header__logo-text { display: none; }
  .main-content { padding: var(--space-4); }
  .product-grid { grid-template-columns: 1fr; }
}


/* ============================================================
   Feedback Popup Styles
   ============================================================ */

/* Floating Feedback Trigger */
.feedback-trigger {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 30px;
  padding: 12px 20px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15), 0 2px 5px rgba(0, 0, 0, 0.1);
  z-index: 99;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.2s, box-shadow 0.2s;
}

.feedback-trigger:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2), 0 3px 10px rgba(0, 0, 0, 0.1);
}

.feedback-trigger:active {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* Feedback Overlay */
.feedback-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 12, 36, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feedback-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

/* Feedback Modal Content Window */
.feedback-modal {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(30px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.feedback-overlay--visible .feedback-modal {
  transform: translateY(0) scale(1);
}

/* Header */
.feedback-modal__header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-gray-50);
}

.feedback-modal__title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.feedback-modal__close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--color-gray-500);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, transform 0.2s;
  line-height: 1;
}

.feedback-modal__close:hover {
  color: var(--color-danger);
  transform: scale(1.15);
}

/* Body / Form */
.feedback-modal__form {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.feedback-modal__body {
  padding: var(--space-5) var(--space-6);
  max-height: 65vh;
  overflow-y: auto;
}

.feedback-modal__intro {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.5;
}

/* Form Groups */
.feedback-group {
  margin-bottom: var(--space-4);
}

.feedback-group:last-child {
  margin-bottom: 0;
}

.feedback-label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-gray-800);
  margin-bottom: var(--space-2);
}

.feedback-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.char-counter {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* Rating Stars */
.rating-stars {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.rating-star {
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-gray-300);
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s, color 0.15s, text-shadow 0.15s;
  line-height: 1;
}

.rating-star:hover {
  transform: scale(1.2);
}

.rating-star.hovered,
.rating-star.selected {
  color: #FFB300;
  text-shadow: 0 0 4px rgba(255, 179, 0, 0.4);
}

.rating-prompt {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-gray-500);
  min-height: var(--font-size-xs);
  transition: color 0.2s;
}

.rating-prompt.has-rating {
  color: var(--color-primary);
  font-weight: 600;
}

/* Category Selection */
.feedback-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.category-pill {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.category-pill:hover {
  background-color: var(--color-gray-200);
  color: var(--color-black);
}

.category-pill.active {
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
  border-color: var(--color-primary-light);
  font-weight: 600;
}

/* Inputs & Textareas */
.feedback-textarea,
.feedback-input {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  padding: 8px 12px;
}

.feedback-textarea {
  height: 90px;
  resize: none;
}

.feedback-input {
  height: 40px;
}

.feedback-textarea:focus,
.feedback-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(32, 72, 120, 0.15);
}

/* Footer / Actions */
.feedback-modal__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  background-color: var(--color-gray-50);
}

.feedback-btn {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feedback-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.feedback-btn--secondary {
  background-color: var(--color-white);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

.feedback-btn--secondary:hover:not(:disabled) {
  background-color: var(--color-gray-100);
  color: var(--color-black);
}

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

.feedback-btn--primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.feedback-btn.loading {
  color: transparent !important;
  position: relative;
  pointer-events: none;
}

.feedback-btn.loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  top: calc(50% - 9px);
  left: calc(50% - 9px);
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spinner 0.6s linear infinite;
}

@keyframes spinner {
  to { transform: rotate(360deg); }
}

/* Success View */
.feedback-modal__success {
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.success-icon-wrapper {
  margin-bottom: var(--space-4);
}

/* Checkmark animation */
.checkmark {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: block;
  stroke-width: 2;
  stroke: var(--color-success);
  stroke-miterlimit: 10;
  box-shadow: inset 0 0 0 var(--color-success);
  animation: fill .4s ease-in-out .4s forwards, scale .3s ease-in-out .9s both;
}

.checkmark__circle {
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  stroke-width: 2;
  stroke-miterlimit: 10;
  stroke: var(--color-success);
  fill: none;
  animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.checkmark__check {
  transform-origin: 50% 50%;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  stroke: var(--color-success);
  animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.6s forwards;
}

@keyframes stroke {
  100% { stroke-dashoffset: 0; }
}
@keyframes scale {
  0%, 100% { transform: none; }
  50% { transform: scale3d(1.1, 1.1, 1); }
}
@keyframes fill {
  100% { box-shadow: inset 0 0 0 30px var(--color-success-bg); }
}

.success-title {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-success);
}

.success-message {
  margin: 0;
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.5;
  max-width: 320px;
}

/* Clickable Logo Styles */
a.header__logo {
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}
a.header__logo:hover {
  opacity: 0.85;
}