:root {
  --bg: #fafafa;
  --surface: #f5f5f5;
  --surface-hover: #ececec;
  --primary: #000000;
  --primary-hover: #1a1a1a;
  --text: #000000;
  --text-muted: #737373;
  --border: #e5e5e5;
  --error: #ef4444;
  --success: #22c55e;
  --accent: #71717a;
  --accent-light: rgba(113, 113, 122, 0.08);
  --accent-glow: rgba(113, 113, 122, 0.12);
  --glass: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --radius-lg: 16px;
}

body.dark-theme {
  --bg: #080808;
  --surface: #141414;
  --surface-hover: #1f1f1f;
  --primary: #ffffff;
  --primary-hover: #f0f0f0;
  --text: #ffffff;
  --text-muted: #a3a3a3;
  --border: #262626;
  --accent: #d4d4d8;
  --accent-light: rgba(212, 212, 218, 0.08);
  --accent-glow: rgba(212, 212, 218, 0.12);
  --glass: rgba(8, 8, 8, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  min-height: -webkit-fill-available;
  transition: background 0.3s ease;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;

}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 99998;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
  opacity: 0.02;
  mix-blend-mode: overlay;
}

body.dark-theme::before { opacity: 0.03; }

a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
@media (max-width: 600px) { .container { padding: 0 12px; } }
@media (max-width: 380px) { .container { padding: 0 8px; } }

/* ===== HEADER ===== */
header {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.logo { font-size: 22px; font-weight: 900; cursor: pointer; letter-spacing: -1.2px; color: var(--text); }
.logo span { color: var(--accent); }
.text-accent { color: var(--accent); }

.header-actions { display: flex; align-items: center; gap: 16px; }

/* User Badge */
.user-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 16px 4px 6px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  cursor: pointer;
  transition: all 0.2s;
}
.user-badge:hover { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }

.user-badge-icon {
  width: 36px; height: 36px;
  background: #f4f4f5;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #71717a;
}
body.dark-theme .user-badge-icon { background: #262626; color: #a1a1aa; }

.user-badge-name { font-size: 13px; font-weight: 800; color: var(--text); }

.theme-toggle {
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { background: var(--surface); border-color: var(--accent); color: var(--accent); }

.nav-divider { width: 1px; height: 24px; background: var(--border); margin: 0 4px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 20px; border-radius: 10px;
  font-size: 13px; font-weight: 700;
  cursor: pointer; transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border: 1px solid transparent;
}
.btn:active { transform: scale(0.96); }

.btn-primary { background: var(--primary); color: var(--bg); }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
body.dark-theme .btn-primary:hover { box-shadow: 0 4px 16px rgba(255,255,255,0.1); }

.btn-outline { border: 1px solid var(--border); background: transparent; color: var(--text); }
.btn-outline:hover { background: var(--surface-hover); border-color: var(--text-muted); }

.btn-ghost { border: 1px solid var(--border); background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-muted); background: var(--surface-hover); }

.btn-premium { background: #000; color: #fff !important; }
.btn-premium:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
body.dark-theme .btn-premium { background: #fff; color: #000 !important; }
body.dark-theme .btn-premium:hover { box-shadow: 0 4px 16px rgba(255,255,255,0.1); }

.filter-chips-group [id$="Chips"] {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding-bottom: 4px;
  flex: 1;
  min-width: 0;
}

/* ===== FILTERS ===== */
.filters-grid {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px;
  margin-top: -30px;
  margin-bottom: 40px;
  display: grid;
  grid-template-columns: 3fr 1fr 1fr;
  gap: 12px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 100%;
}
body.dark-theme .filters-grid { background: var(--surface); box-shadow: var(--shadow-sm); }
.filters-grid:focus-within { border-color: var(--accent); box-shadow: 0 4px 24px var(--accent-glow); }

/* ===== CHIPS ===== */
.chip {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.chip:hover { border-color: var(--text-muted); }
.chip.active { background: var(--primary); border-color: var(--primary); color: var(--bg); }
body.dark-theme .chip { background: var(--surface); border-color: var(--border); color: var(--text); }
body.dark-theme .chip.active { background: var(--primary); border-color: var(--primary); color: var(--bg); }

/* ===== CARDS ===== */
.feed-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }

.product-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  background: var(--bg);
  content-visibility: auto;
  contain: layout style;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
body.dark-theme .product-card:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); }

.product-img {
  height: 300px;
  background-size: cover;
  background-position: center;
  position: relative;
  background-color: var(--surface);
}
.product-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--surface);
  z-index: -1;
}
.product-info { padding: 15px; }
.product-price { font-size: 18px; font-weight: 800; }
.product-title {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  word-break: break-word;
}
.product-meta {
  display: flex; justify-content: space-between;
  margin-top: 12px; padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 11px; font-weight: 700;
}

.product-seller {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

.seller-avatar-mini {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--surface);
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  display: none; align-items: center; justify-content: center;
  z-index: 2000;
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 32px;
  border-radius: 20px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
}

.modal-input {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  padding: 12px; font-size: 14px; outline: none; font-family: inherit;
}

.hero { padding: 60px 0; text-align: center; position: relative; }
.hero h1 { font-size: clamp(26px, 6.5vw, 56px); font-weight: 900; letter-spacing: -2px; }

input, select, textarea {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  padding: 12px; font-size: 14px; outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light);
}

/* Force consistent input styling — fix autofill/override issues */
input[type="text"],
input[type="number"],
input[type="password"],
input[type="search"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background: var(--surface) !important;
  color: var(--text) !important;
}
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text) !important;
  -webkit-box-shadow: 0 0 0px 1000px var(--surface) inset !important;
  transition: background-color 5000s ease-in-out 0s;
}

.fade-in { animation: fadeIn 0.4s ease-out forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

div::-webkit-scrollbar { height: 4px; }
div::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }

/* Toast */
.toast-container {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  z-index: 99999; display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--bg); color: var(--text);
  padding: 14px 24px; border-radius: 14px;
  font-weight: 600; font-size: 14px;
  box-shadow: var(--shadow-lg); border: 1px solid var(--border);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-align: center; pointer-events: auto; white-space: nowrap;
  animation: toastIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ============================================================
   RESPONSIVE — TABLETS (≤1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .product-img { height: 250px; }
  .specs-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   RESPONSIVE — TABLETS (≤900px)
   ============================================================ */
@media (max-width: 900px) {
  .feed-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-img { height: 200px; }
  .hero h1 { font-size: clamp(24px, 5vw, 36px); }
  .hero { padding: 40px 0; }

  .filters-grid {
    grid-template-columns: 1fr !important;
    gap: 10px;
    padding: 16px;
    margin-top: -20px;
  }
  .filters-grid > * { grid-column: 1 / -1 !important; }

  .product-grid { grid-template-columns: 1fr; gap: 30px; }
  .recommendations-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   RESPONSIVE — TABLETS (≤820px)
   ============================================================ */
@media (max-width: 820px) {
  .hero h1 { font-size: clamp(26px, 4vw, 32px); letter-spacing: -1px; }
  .profile-avatar { width: 110px; height: 110px; border-radius: 30px; }
  .profile-header { gap: 24px; }
  .action-bar .btn { height: 50px; font-size: 14px; }
  .price-tag { font-size: 30px; }
  #title { font-size: 32px !important; }
  .gallery-main { aspect-ratio: 3/4; }
  .admin-wrap .tabs { top: 80px; }
}

/* ============================================================
   RESPONSIVE — TABLETS (≤768px)
   ============================================================ */
@media (max-width: 768px) {
  .hero h1 { font-size: clamp(22px, 5vw, 28px); }
  .hero p { font-size: 15px; }
  .feed-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .product-img { height: 180px; }
  .seller-box { flex-direction: column; gap: 16px; text-align: center; }
  .seller-info { flex-direction: column; }
  .specs-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .spec-item { padding: 12px; }
  .spec-value { font-size: 13px; }
  .action-bar { flex-wrap: wrap; }
  .action-bar .btn { flex: 1 1 auto; min-width: 0; }
  .admin-wrap { padding: 20px 16px; }
  .links-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤600px)
   ============================================================ */
@media (max-width: 600px) {

  /* --- Header --- */
  header {
    height: 52px !important;
    padding: 0 12px !important;
    min-height: 52px !important;
  }
  .logo { font-size: 17px !important; letter-spacing: -0.8px !important; }
  .header-actions { gap: 6px !important; }
  .nav-divider { display: none !important; }

  .theme-toggle {
    width: 32px !important; height: 32px !important;
    border-radius: 8px !important;
  }
  .theme-toggle i { width: 16px !important; height: 16px !important; }

  .user-badge {
    padding: 2px 8px 2px 2px !important;
    gap: 5px !important;
    border-radius: 8px !important;
  }
  .user-badge-icon { width: 26px !important; height: 26px !important; border-radius: 7px !important; }
  .user-badge-name { font-size: 10px !important; }

  .btn-premium {
    padding: 6px 10px !important;
    font-size: 10px !important;
    border-radius: 8px !important;
  }

  /* --- Container --- */
  .container { padding: 0 10px !important; }

  /* --- Hero --- */
  .hero { padding: 16px 0 !important; }
  .hero h1 { font-size: clamp(20px, 6vw, 24px) !important; letter-spacing: -0.3px !important; margin-bottom: 4px !important; }
  .hero p { font-size: 12px !important; }

  /* --- Filters --- */
  .filters-grid {
    grid-template-columns: 1fr !important;
    gap: 6px !important;
    padding: 10px !important;
    margin-top: -10px !important;
    margin-bottom: 12px !important;
    border-radius: 12px !important;
    width: 100% !important;
    max-width: 100% !important;
  }
  .filters-grid > * { grid-column: 1 / -1 !important; }

  .filters-grid input[type="text"],
  .filters-grid input[type="number"],
  .filters-grid input[type="search"] {
    height: 38px !important;
    font-size: 13px !important;
  }

  .filter-chips-group {
    gap: 8px !important;
    margin-top: 6px !important;
  }
  .filter-chips-group [id$="Chips"] {
    gap: 4px !important;
  }
  .filter-chips-group > div {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 6px !important;
  }

  /* --- Chips --- */
  .chip {
    padding: 5px 10px !important;
    font-size: 11px !important;
    border-radius: 14px !important;
  }

  /* --- Product Grid --- */
  .feed-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 6px !important;
  }
  .product-img { height: 150px !important; }
  .product-info { padding: 8px !important; }
  .product-card { border-radius: 10px !important; }
  .product-price { font-size: 15px !important; }
  .product-title { font-size: 12px !important; margin-top: 3px !important; }
  .product-meta {
    font-size: 10px !important;
    margin-top: 6px !important;
    padding-top: 6px !important;
  }

  /* --- Buttons --- */
  .btn { padding: 7px 12px !important; font-size: 11px !important; border-radius: 8px !important; }

  /* --- Modal --- */
  .modal-overlay { padding: 8px !important; align-items: flex-end !important; }
  .modal-content {
    padding: 20px !important;
    border-radius: 16px 16px 0 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    max-height: 85vh !important;
    overflow-y: auto !important;
    margin-top: auto;
  }
  .modal-content h2 { font-size: 17px !important; margin-bottom: 16px !important; }

  /* --- Sell Grid — все поля в столбец --- */
  .sell-grid {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
  }
  .sell-grid > div { grid-column: 1 / -1 !important; }
  .sell-actions { flex-direction: column !important; gap: 8px !important; }
  .sell-actions .btn { width: 100% !important; height: 42px !important; }

  /* --- Reviews / Recommendations --- */
  .reviews-section { margin-top: 24px !important; padding-top: 16px !important; }
  .reviews-header h2 { font-size: 15px !important; }
  .recommendations-section { margin-top: 24px !important; padding-top: 16px !important; }
  .recommendations-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 6px !important; }

  /* --- Profile / User --- */
  .profile-header { gap: 16px !important; margin-bottom: 20px !important; }
  .profile-avatar { width: 72px !important; height: 72px !important; border-radius: 20px !important; }
  .profile-hero { padding: 24px 0 !important; }
  .tabs-nav { gap: 20px !important; overflow-x: auto !important; -webkit-overflow-scrolling: touch; }
  .tab-btn { white-space: nowrap !important; font-size: 12px !important; }

  .section-title { font-size: 15px !important; gap: 6px !important; margin-bottom: 12px !important; }
  .section-title i { width: 16px !important; }

  /* --- Settings --- */
  .settings-card { padding: 16px !important; }
  .settings-container { margin: 12px auto !important; }
  .avatar-upload { flex-direction: column !important; text-align: center !important; gap: 12px !important; }

  /* --- Toast --- */
  .toast { font-size: 12px !important; padding: 10px 14px !important; border-radius: 10px !important; white-space: normal !important; }
  .toast-container { bottom: 80px !important; }
}

/* ============================================================
   RESPONSIVE — MOBILE MEDIUM (≤430px)
   ============================================================ */
@media (max-width: 430px) {
  .hero h1 { font-size: clamp(18px, 5.5vw, 22px) !important; }
  .product-img { height: 120px !important; }
  .feed-grid { gap: 4px !important; }
  .product-price { font-size: 12px !important; }
  .product-title { font-size: 10px !important; }
  .product-info { padding: 6px !important; }
  .product-meta { font-size: 8px !important; margin-top: 2px !important; padding-top: 2px !important; }
  .specs-grid { grid-template-columns: 1fr 1fr; gap: 6px; }
  .spec-item { padding: 8px; }
  .spec-value { font-size: 12px; }
  .spec-label { font-size: 9px; }
  .price-tag { font-size: 24px !important; }
  #title { font-size: 22px !important; }
  .seller-avatar { width: 36px; height: 36px; }
  .modal-overlay { padding: 4px !important; }
  .modal-content { padding: 16px !important; }
  .review-card { padding: 14px; }
  .profile-stats { gap: 12px; }
  .stat-value { font-size: 15px; }
  .stat-label { font-size: 10px; }
  .near-fab { right: 12px; bottom: 12px; }
  .near-fab-btn { width: 48px; height: 48px; border-radius: 14px; }
  .near-panel { right: 8px; left: 8px; width: auto; }
  .gallery-thumbs .thumb { width: 50px; height: 50px; }
}

/* ============================================================
   RESPONSIVE — VERY SMALL (≤380px)
   ============================================================ */
@media (max-width: 380px) {
  .feed-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .product-img { height: 130px !important; }
  .hero h1 { font-size: clamp(16px, 5vw, 20px) !important; }
  .recommendations-grid { grid-template-columns: 1fr !important; }
  .header-actions { gap: 4px !important; }
  .theme-toggle { width: 28px !important; height: 28px !important; }
  .user-badge-name { font-size: 9px !important; }
  .near-fab { right: 8px; bottom: 8px; }
}

/* ============================================================
   RESPONSIVE — VERY VERY SMALL (≤320px)
   ============================================================ */
@media (max-width: 320px) {
  .hero h1 { font-size: clamp(14px, 5vw, 17px) !important; }
  .feed-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 2px !important; }
  .product-img { height: 100px !important; }
  .product-price { font-size: 11px !important; }
  .product-title { font-size: 8px !important; }
  .chip { padding: 3px 6px !important; font-size: 9px !important; }
  .btn { padding: 5px 8px !important; font-size: 10px !important; }
  .specs-grid { grid-template-columns: 1fr; }
  .stat-value { font-size: 13px; }
  .profile-stats { flex-wrap: wrap; gap: 8px; }
  .modal-content { padding: 12px !important; }
  .modal-content h2 { font-size: 15px !important; }
  .tabs-nav { gap: 10px !important; }
  .tab-btn { font-size: 10px !important; }
  .seller-box { padding: 12px; }
  .action-bar .btn { height: 40px !important; font-size: 12px !important; }
}