/* ATX Gaming PCs — Shared Stylesheet */
:root {
  --bg: #0d0d0f; --bg2: #141418; --bg3: #1c1c22; --card: #1e1e26;
  --border: rgba(255,255,255,0.08); --border2: rgba(255,255,255,0.15);
  --text: #f0f0f5; --text2: #a0a0b0; --text3: #6a6a7a;
  --accent: #e84118; --accent2: #ff6b35; --accent-glow: rgba(232,65,24,0.2);
  --green: #00c96b; --blue: #3b82f6; --yellow: #f59e0b;
  --nav-h: 72px;
}
[data-theme="light"] {
  --bg: #f5f5f7; --bg2: #ffffff; --bg3: #ebebef; --card: #ffffff;
  --border: rgba(0,0,0,0.08); --border2: rgba(0,0,0,0.18);
  --text: #111118; --text2: #44445a; --text3: #8888a0;
  --accent: #cc2200; --accent2: #e84118; --accent-glow: rgba(204,34,0,0.12);
  --green: #00944e; --blue: #2563eb; --yellow: #d97706;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

/* NOTICE BANNER */
.notice-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: var(--yellow); color: #1a1000;
  display: flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 0.55rem 1rem;
  font-size: 0.82rem; font-weight: 600; text-align: center; line-height: 1.4;
}
.notice-banner .notice-icon { font-size: 0.9rem; flex-shrink: 0; }
.notice-banner .notice-close {
  position: absolute; right: 1rem; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer;
  font-size: 1rem; color: #1a1000; opacity: 0.6; line-height: 1;
  padding: 4px 6px; border-radius: 4px; transition: opacity 0.2s;
}
.notice-banner .notice-close:hover { opacity: 1; }
body.has-banner { --banner-h: 36px; }
body.has-banner nav { top: var(--banner-h); }
body.has-banner .mobile-nav { top: calc(var(--banner-h) + var(--nav-h)); }
body.has-banner .page-hero { padding-top: calc(var(--banner-h) + var(--nav-h) + 3rem); }
body.has-banner #hero { padding-top: calc(var(--banner-h) + var(--nav-h) + 4rem); }
@media (max-width: 600px) {
  body.has-banner { --banner-h: 52px; }
  .notice-banner .notice-close { display: none; }
}

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h); background: var(--bg); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; backdrop-filter: blur(12px);
  transition: height 0.3s, box-shadow 0.3s;
  animation: navSlide 0.5s cubic-bezier(0.16,1,0.3,1) both;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em;
  text-decoration: none; color: var(--text);
}
.logo-icon {
  width: 36px; height: 36px; background: var(--accent); border-radius: 8px;
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1);
}
.logo:hover .logo-icon { transform: rotate(20deg) scale(1.1); }
.logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; list-style: none; }
.nav-links a {
  color: var(--text2); text-decoration: none; font-size: 0.9rem; font-weight: 500;
  transition: color 0.2s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: right; transition: transform 0.25s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after { transform: scaleX(1); }
.nav-right { display: flex; align-items: center; gap: 1rem; }
.theme-btn {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border2);
  background: var(--bg3); color: var(--text); cursor: pointer; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, transform 0.3s cubic-bezier(0.34,1.56,0.64,1), border-color 0.2s;
}
.theme-btn:hover { transform: scale(1.15) rotate(20deg); border-color: var(--accent); }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0.55rem 1.2rem; border-radius: 8px; font-size: 0.875rem;
  font-weight: 600; cursor: pointer; text-decoration: none; border: none;
  transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent); color: #fff; position: relative; overflow: hidden;
}
.btn-primary::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 0; height: 0; background: rgba(255,255,255,0.15); border-radius: 50%;
  transform: translate(-50%,-50%); transition: width 0.5s, height 0.5s, opacity 0.5s; opacity: 0;
}
.btn-primary:hover::before { width: 300px; height: 300px; opacity: 1; }
.btn-primary:hover { box-shadow: 0 0 20px var(--accent-glow); transform: translateY(-1px); }
.btn-ghost {
  background: transparent; border: 1px solid var(--border2); color: var(--text);
  transition: background 0.2s, border-color 0.2s, transform 0.15s, color 0.2s;
}
.btn-ghost:hover { background: var(--bg3); border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-lg { padding: 0.8rem 1.8rem; font-size: 1rem; border-radius: 10px; }

/* SECTIONS */
section { padding: 5rem 2rem; }
.container { max-width: 1200px; margin: 0 auto; }
.section-label {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.5rem;
}
h2.section-title {
  font-size: clamp(1.8rem,3vw,2.6rem); font-weight: 800; letter-spacing: -0.03em;
  color: var(--text); margin-bottom: 0.75rem; cursor: default;
}
.section-sub { color: var(--text2); font-size: 1.05rem; margin-bottom: 3rem; max-width: 540px; }

/* PC TIER CARDS */
.pc-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.pc-tier {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  overflow: hidden; display: flex; flex-direction: column;
  transition: border-color 0.3s, transform 0.35s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.3s;
}
.pc-tier:hover {
  border-color: var(--accent) !important; transform: translateY(-8px) scale(1.01);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3), 0 0 30px var(--accent-glow);
}
.pc-tier.featured { border-color: var(--accent); animation: borderPulse 2.5s ease-in-out infinite; }
.tier-header { padding: 1.5rem 1.5rem 1rem; position: relative; }
.tier-badge {
  position: absolute; top: 1rem; right: 1rem;
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  padding: 3px 10px; border-radius: 20px;
}
.badge-entry { background: rgba(0,201,107,0.15); color: var(--green); }
.badge-mid { background: rgba(59,130,246,0.15); color: var(--blue); }
.badge-pro { background: rgba(232,65,24,0.15); color: var(--accent2); }
.tier-name { font-size: 1.1rem; font-weight: 800; margin-bottom: 0.25rem; }
.tier-sub { font-size: 0.82rem; color: var(--text3); }
.tier-price { font-size: 2.2rem; font-weight: 900; letter-spacing: -0.04em; color: var(--text); padding: 0 1.5rem 1rem; }
.tier-price sup { font-size: 1rem; vertical-align: top; margin-top: 6px; color: var(--text2); }
.tier-specs { padding: 0 1.5rem; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.tier-spec-row {
  display: flex; align-items: flex-start; gap: 8px; font-size: 0.85rem;
  padding: 6px 0; border-bottom: 1px solid var(--border);
  transition: background 0.2s, padding-left 0.2s;
}
.tier-spec-row:last-child { border-bottom: none; }
.tier-spec-row:hover { background: var(--bg3); padding-left: 8px; border-radius: 6px; }
.spec-icon { font-size: 0.9rem; width: 18px; text-align: center; flex-shrink: 0; margin-top: 1px; }
.spec-info { flex: 1; }
.spec-label { font-weight: 600; color: var(--text); }
.spec-detail { color: var(--text3); font-size: 0.78rem; }
.tier-footer { padding: 1.25rem 1.5rem; }

/* WHY CARDS */
.why-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.why-card {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 14px; padding: 1.5rem;
  transition: border-color 0.25s, transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.25s, box-shadow 0.25s;
  cursor: default;
}
.why-card:hover { background: var(--card); border-color: var(--accent); transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.2); }
.why-icon { font-size: 1.8rem; margin-bottom: 0.75rem; transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1); }
.why-card:hover .why-icon { transform: scale(1.25) rotate(8deg); }
.why-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.4rem; }
.why-desc { font-size: 0.85rem; color: var(--text2); line-height: 1.55; }

/* FOOTER */
footer { background: var(--bg); border-top: 1px solid var(--border); padding: 3rem 2rem 2rem; }
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem;
}
.footer-brand p { color: var(--text3); font-size: 0.85rem; margin-top: 0.75rem; max-width: 260px; }
.footer-col h4 { font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); margin-bottom: 0.75rem; }
.footer-col a {
  display: block; color: var(--text2); text-decoration: none; font-size: 0.85rem;
  margin-bottom: 0.4rem; padding-left: 0;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-col a:hover { color: var(--accent) !important; padding-left: 6px; }
.footer-bottom { max-width: 1200px; margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--text3); }

/* HAMBURGER */
.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; border: 1px solid var(--border2); border-radius: 8px;
  background: var(--bg3); cursor: pointer; padding: 8px;
  transition: border-color 0.2s, background 0.2s;
}
.hamburger:hover { border-color: var(--accent); }
.hamburger span { display: block; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; transform-origin: center; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-nav {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; bottom: 0;
  background: var(--bg); z-index: 99; flex-direction: column;
  padding: 1.5rem 1.5rem 2rem; gap: 0.25rem; border-top: 1px solid var(--border);
  transform: translateX(100%); transition: transform 0.35s cubic-bezier(0.16,1,0.3,1); overflow-y: auto;
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav a {
  display: block; padding: 0.9rem 1rem; font-size: 1.1rem; font-weight: 600;
  color: var(--text2); text-decoration: none; border-radius: 10px; border-bottom: 1px solid var(--border);
  transition: color 0.2s, background 0.2s, padding-left 0.2s;
}
.mobile-nav a:hover { color: var(--text); background: var(--bg3); padding-left: 1.4rem; }
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav .mobile-cta { margin-top: 1rem; }

/* ANIMATIONS */
@keyframes navSlide { from { opacity:0; transform:translateY(-100%); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeUp { from { opacity:0; transform:translateY(28px); } to { opacity:1; transform:translateY(0); } }
@keyframes slideRight { from { opacity:0; transform:translateX(-24px); } to { opacity:1; transform:translateX(0); } }
@keyframes float { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-10px); } }
@keyframes pulse-dot { 0%,100% { opacity:1; transform:scale(1); } 50% { opacity:0.5; transform:scale(1.5); } }
@keyframes borderPulse { 0%,100% { box-shadow:0 0 0 0 rgba(232,65,24,0.4); } 50% { box-shadow:0 0 0 8px rgba(232,65,24,0); } }
@keyframes priceFlash { 0% { color:var(--text); } 30% { color:var(--accent); transform:scale(1.08); } 100% { color:var(--accent); transform:scale(1); } }
@keyframes countUp { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }
@keyframes heroGlow { 0%,100% { opacity:0.15; transform:scale(1); } 50% { opacity:0.28; transform:scale(1.08); } }
@keyframes scanGrid { 0% { background-position:0 0; } 100% { background-position:0 40px; } }
@keyframes scanline { 0% { transform:translateY(-100%); opacity:0; } 10% { opacity:0.5; } 90% { opacity:0.5; } 100% { transform:translateY(400%); opacity:0; } }

/* SCROLL REVEAL */
.reveal { opacity:0; transform:translateY(30px); transition: opacity 0.65s cubic-bezier(0.16,1,0.3,1), transform 0.65s cubic-bezier(0.16,1,0.3,1); }
.reveal.visible { opacity:1; transform:translateY(0); }
.reveal-left { opacity:0; transform:translateX(-30px); transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.reveal-left.visible { opacity:1; transform:translateX(0); }
.reveal-right { opacity:0; transform:translateX(30px); transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.reveal-right.visible { opacity:1; transform:translateX(0); }
.delay-1 { transition-delay:0.1s; } .delay-2 { transition-delay:0.2s; }
.delay-3 { transition-delay:0.3s; } .delay-4 { transition-delay:0.4s; }
.delay-5 { transition-delay:0.5s; } .delay-6 { transition-delay:0.6s; }
.price-flash { animation: priceFlash 0.5s ease forwards; }
.summary-val { transition: color 0.3s, transform 0.3s; display: inline-block; }
.summary-val.updated { animation: countUp 0.35s cubic-bezier(0.34,1.56,0.64,1); }

/* PAGE HERO (non-home) */
.page-hero {
  padding: calc(var(--nav-h) + 3rem) 2rem 3rem;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-hero h1 { font-size: clamp(2rem,4vw,3rem); font-weight: 900; letter-spacing: -0.04em; margin-bottom: 0.75rem; animation: fadeUp 0.7s 0.1s cubic-bezier(0.16,1,0.3,1) both; }
.page-hero p { color: var(--text2); font-size: 1.05rem; max-width: 540px; margin: 0 auto; animation: fadeUp 0.7s 0.25s cubic-bezier(0.16,1,0.3,1) both; }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 6px; font-size: 0.78rem; color: var(--text3); margin-bottom: 1rem; animation: fadeUp 0.6s 0.05s cubic-bezier(0.16,1,0.3,1) both; }
.breadcrumb a { color: var(--text3); text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text3); }

/* TABLET */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .pc-grid { gap: 1rem; }
}

/* MOBILE */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: flex; top: var(--nav-h); }
  .nav-right .btn:not(.theme-btn) { display: none; }
  section { padding: 3rem 1.25rem; }
  .pc-grid { grid-template-columns: 1fr; gap: 1rem; }
  .pc-tier:hover { transform: none; box-shadow: none; }
  .why-grid { grid-template-columns: 1fr; gap: 0.75rem; }
  .why-card:hover { transform: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  h2.section-title { font-size: clamp(1.5rem,6vw,2rem); }
  .page-hero { padding: calc(var(--nav-h) + 2rem) 1.25rem 2rem; }
}

@media (max-width: 480px) {
  section { padding: 2.5rem 1rem; }
  .tier-price { font-size: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.1s !important; }
  .reveal, .reveal-left, .reveal-right { opacity:1; transform:none; }
}