:root {
  color-scheme: dark;
  --bg: #101315;
  --surface: #171c1e;
  --surface-raised: #1d2426;
  --line: rgba(255, 255, 255, .09);
  --text: #f4f1eb;
  --muted: #9aa3a2;
  --accent: #ff6a1a;
  --accent-light: #ff9a49;
  --green: #a9d477;
  --radius: 16px;
  font-family: 'DM Sans', 'Noto Sans SC', sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
.container, .nav-container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.navbar { position: sticky; top: 0; z-index: 20; background: rgba(16, 19, 21, .88); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.nav-container { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo { display: inline-flex; align-items: center; gap: 9px; font-size: 20px; font-weight: 800; letter-spacing: -.7px; }
.logo-icon { color: var(--accent); font-size: 25px; }
.logo-accent { color: var(--accent-light); }
.nav-links, .nav-auth, .nav-user { display: flex; align-items: center; gap: 26px; }
.nav-link { color: var(--muted); font-size: 14px; transition: color .2s; }
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-user { gap: 10px; }
.user-name { font-size: 14px; }
.user-avatar, .form-avatar, .message-avatar { width: 38px; height: 38px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; background: linear-gradient(140deg, #ff9751, #e84c0c); color: #17110d; font-weight: 800; }
.nav-mobile-toggle { display: none; border: 0; background: transparent; padding: 8px; }
.nav-mobile-toggle span { display: block; width: 22px; height: 2px; margin: 5px 0; background: var(--text); }
.mobile-menu { display: none; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 7px; padding: 11px 17px; font-weight: 700; cursor: pointer; transition: transform .2s, background .2s, border-color .2s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { color: #17110d; background: var(--accent); }
.btn-primary:hover { background: var(--accent-light); }
.btn-outline { color: var(--text); border-color: rgba(255,255,255,.22); background: transparent; }
.btn-outline:hover { border-color: var(--accent); }
.btn-ghost { padding: 8px 10px; color: var(--muted); background: transparent; }
.btn-sm { padding: 8px 13px; font-size: 13px; }
.btn-lg { min-height: 52px; padding: 13px 22px; }
.btn-block { width: 100%; }

.hero { position: relative; min-height: 630px; display: flex; align-items: center; overflow: hidden; border-bottom: 1px solid var(--line); background: radial-gradient(ellipse at 78% 45%, rgba(197, 73, 20, .2), transparent 34%), linear-gradient(112deg, #101315 34%, #191917 100%); }
.hero::after { content: ''; position: absolute; inset: 0 0 0 52%; opacity: .28; background: repeating-linear-gradient(135deg, transparent 0 34px, rgba(255,255,255,.06) 35px 36px, transparent 37px 72px); mask-image: linear-gradient(90deg, transparent, black); }
.hero-content { position: relative; z-index: 2; width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 75px 0 78px; }
.hero-badge, .section-tag { display: inline-flex; align-items: center; gap: 9px; color: var(--accent-light); font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; }
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 14px var(--green); }
.hero-title { max-width: 670px; margin: 24px 0 16px; font-size: clamp(48px, 7vw, 78px); line-height: 1.1; letter-spacing: -3px; }
.gradient-text { color: var(--accent-light); }
.hero-desc { max-width: 560px; color: #b4bbba; font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-stats { display: flex; gap: clamp(28px, 5vw, 65px); margin-top: 50px; }
.stat { display: grid; gap: 2px; }
.stat-number { font-size: 25px; font-weight: 800; }
.stat-label { color: var(--muted); font-size: 12px; }
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero-particle { position: absolute; right: 9%; top: 24%; width: 240px; height: 240px; border: 1px solid rgba(255, 106, 26, .18); border-radius: 50%; box-shadow: 0 0 100px rgba(255,106,26,.08), inset 0 0 70px rgba(255,106,26,.08); }
.hero-particle:nth-child(2) { right: 12%; top: 30%; width: 180px; height: 180px; }
.hero-particle:nth-child(3) { right: 4%; top: 39%; width: 90px; height: 90px; background: rgba(255,106,26,.08); }
.hero-particle:nth-child(4), .hero-particle:nth-child(5) { display: none; }

.products, .about, .community { padding: 92px 0; }
.products { background: #131719; }
.section-header { max-width: 700px; margin: 0 auto 42px; text-align: center; }
.section-title { margin: 10px 0 8px; font-size: clamp(31px, 4vw, 45px); line-height: 1.2; letter-spacing: -1.4px; }
.section-desc { margin: 0; color: var(--muted); }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.product-card { position: relative; display: flex; flex-direction: column; min-height: 340px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(155deg, rgba(255,255,255,.035), transparent 65%), var(--surface); transition: transform .22s, border-color .22s; }
.product-card:hover { transform: translateY(-4px); border-color: rgba(255,106,26,.55); }
.product-card.featured { background: linear-gradient(155deg, rgba(255,106,26,.1), transparent 62%), var(--surface); }
.product-icon { display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 20px; border-radius: 14px; background: rgba(255,106,26,.11); font-size: 27px; }
.product-badge { position: absolute; top: 27px; right: 24px; color: var(--accent-light); font-size: 11px; font-weight: 800; letter-spacing: .6px; }
.product-card h3 { margin: 0 0 9px; font-size: 18px; }
.product-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.product-specs { display: flex; flex-wrap: wrap; gap: 7px; margin: 17px 0; }
.product-specs span { padding: 5px 8px; border-radius: 5px; background: rgba(255,255,255,.055); color: #c2c8c6; font-size: 10px; }
.product-price { margin: auto 0 15px; color: var(--accent-light); font-size: 23px; font-weight: 800; }
.product-card .btn { min-height: 43px; }

.about { background: var(--bg); }
.about-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.about-card { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.about-icon { margin-bottom: 12px; font-size: 26px; }
.about-card h3 { margin: 0 0 7px; font-size: 16px; }
.about-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.community { background: #131719; }
.message-input-area, .messages-list { max-width: 820px; margin: 0 auto; }
.login-prompt { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); text-align: center; }
.prompt-icon { font-size: 32px; }
.login-prompt h3 { margin: 8px 0; }
.login-prompt p { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.message-form { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.form-user-info { display: flex; align-items: center; gap: 11px; margin-bottom: 15px; font-size: 14px; font-weight: 700; }
.message-textarea, .reply-input, .form-group input { width: 100%; border: 1px solid var(--line); border-radius: 8px; outline: 0; color: var(--text); background: #111516; }
.message-textarea { min-height: 110px; resize: vertical; padding: 14px; }
.message-textarea:focus, .reply-input:focus, .form-group input:focus { border-color: var(--accent); }
.form-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 12px; }
.char-count { color: var(--muted); font-size: 12px; }
.messages-list { display: grid; gap: 13px; margin-top: 24px; }
.empty-state { padding: 40px 20px; border: 1px dashed var(--line); border-radius: var(--radius); color: var(--muted); text-align: center; }
.empty-icon { font-size: 28px; }
.empty-state h3 { margin: 8px 0 4px; color: var(--text); }
.empty-state p { margin: 0; font-size: 13px; }
.message-card { padding: 21px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.message-heading { display: flex; align-items: center; gap: 11px; }
.message-meta { flex: 1; }
.message-meta strong { display: block; font-size: 14px; }
.message-meta time { color: var(--muted); font-size: 11px; }
.message-content { margin: 17px 0; color: #d5d9d7; white-space: pre-wrap; overflow-wrap: anywhere; }
.message-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.message-action { border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; color: var(--muted); background: transparent; font-size: 12px; cursor: pointer; }
.message-action:hover, .message-action.is-liked { border-color: rgba(255,106,26,.5); color: var(--accent-light); }
.message-action.delete-action { margin-left: auto; }
.replies { display: grid; gap: 10px; margin: 16px 0 0 18px; padding-left: 14px; border-left: 1px solid var(--line); }
.replies[hidden] { display: none; }
.reply-item { color: #c5ccca; font-size: 13px; }
.reply-item strong { color: var(--text); }
.reply-item time { margin-left: 8px; color: var(--muted); font-size: 10px; }
.reply-form { display: flex; gap: 8px; margin-top: 14px; }
.reply-input { min-width: 0; padding: 9px 11px; font-size: 13px; }
.reply-form .btn { padding: 8px 12px; font-size: 12px; }

.footer { padding: 55px 0 22px; border-top: 1px solid var(--line); background: #0d1011; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 35px; }
.footer-brand p { max-width: 260px; color: var(--muted); font-size: 13px; }
.footer-social { display: flex; gap: 14px; color: #c0c7c4; font-size: 12px; }
.footer-links { display: grid; align-content: start; gap: 9px; }
.footer-links h4 { margin: 0 0 6px; font-size: 13px; }
.footer-links a { color: var(--muted); font-size: 12px; }
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom { margin-top: 42px; padding-top: 17px; border-top: 1px solid var(--line); color: #707977; font-size: 11px; }
.footer-bottom p { margin: 0; }

.modal-overlay { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; overflow: auto; padding: 20px; background: rgba(0,0,0,.72); backdrop-filter: blur(7px); }
.modal-overlay[hidden] { display: none; }
.modal { position: relative; width: min(100%, 440px); padding: 32px; border: 1px solid var(--line); border-radius: 18px; background: #191e20; box-shadow: 0 25px 100px rgba(0,0,0,.45); }
.modal-close { position: absolute; top: 15px; right: 15px; width: 34px; height: 34px; border: 0; border-radius: 50%; color: var(--muted); background: rgba(255,255,255,.06); cursor: pointer; }
.modal-header { text-align: center; }
.modal-logo { color: var(--accent); font-size: 30px; }
.modal-header h2 { margin: 4px 0; }
.modal-header p { margin: 0; color: var(--muted); font-size: 13px; }
.modal-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin: 24px 0 18px; padding: 4px; border-radius: 8px; background: #111516; }
.tab-btn { padding: 9px; border: 0; border-radius: 6px; color: var(--muted); background: transparent; cursor: pointer; }
.tab-btn.active { color: var(--text); background: var(--surface-raised); }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; color: #c9cecc; font-size: 12px; font-weight: 600; }
.form-group input { padding: 12px; }
.auth-note { margin: -4px 0 15px; color: var(--muted); font-size: 11px; }
.form-error { margin: 0 0 12px; color: #ff887b; font-size: 13px; }
.modal-footer { margin-top: 18px; color: var(--muted); font-size: 12px; text-align: center; }
.modal-footer p { margin: 0; }
.modal-footer a { color: var(--accent-light); }
.toast-container { position: fixed; right: 20px; bottom: 20px; z-index: 80; display: grid; gap: 8px; }
.toast { max-width: min(400px, calc(100vw - 40px)); padding: 12px 16px; border: 1px solid var(--line); border-radius: 9px; background: #252c2d; box-shadow: 0 10px 35px rgba(0,0,0,.3); font-size: 13px; animation: toast-in .2s ease-out; }
.toast.error { border-color: rgba(255,100,85,.45); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 850px) {
  .nav-links { gap: 15px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 70px; }
  .container, .nav-container, .hero-content { width: min(100% - 32px, 500px); }
  .nav-container { min-height: 66px; }
  .nav-links, .nav-auth, .nav-user { display: none; }
  .nav-mobile-toggle { display: block; }
  .mobile-menu { position: absolute; top: 66px; left: 0; right: 0; z-index: 25; padding: 9px 16px 15px; border-bottom: 1px solid var(--line); background: #141819; }
  .mobile-menu.open { display: grid; }
  .mobile-link { padding: 11px 6px; color: #dce0de; font-size: 14px; }
  .mobile-auth-action { width: 100%; border: 0; background: transparent; text-align: left; cursor: pointer; }
  .hero { min-height: 580px; }
  .hero-content { padding: 62px 0; }
  .hero-title { font-size: clamp(47px, 12vw, 64px); letter-spacing: -2px; }
  .hero-desc { font-size: 14px; }
  .hero-stats { gap: 27px; margin-top: 40px; }
  .stat-number { font-size: 21px; }
  .products, .about, .community { padding: 68px 0; }
  .product-grid, .about-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 320px; }
  .section-header { margin-bottom: 30px; }
  .message-form, .message-card, .login-prompt { padding: 17px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 18px; }
  .footer-brand { grid-column: 1 / -1; }
  .modal { padding: 27px 21px; }
}