/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-card-bg: #f9fafb;
  --color-nav-bg: rgba(255, 255, 255, 0.95);
  --color-footer-bg: #f3f4f6;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-dot: #d1d5db;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 5rem;

  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --line-height-body: 1.6;

  --max-width: 1100px;
  --nav-height: 64px;

  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
}

[data-theme="dark"] {
  --color-bg: #0f0f0f;
  --color-text: #e5e5e5;
  --color-text-muted: #9ca3af;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-border: #262626;
  --color-card-bg: #1a1a1a;
  --color-nav-bg: rgba(15, 15, 15, 0.95);
  --color-footer-bg: #111111;
  --color-shadow: rgba(0, 0, 0, 0.35);
  --color-dot: #2a2a2a;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: var(--line-height-body);
  font-size: 1rem;
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===========================
   Layout
   =========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

main {
  flex: 1;
  padding-top: var(--nav-height);
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: var(--spacing-md); }
p:last-child { margin-bottom: 0; }

ul, ol {
  padding-left: var(--spacing-lg);
}

/* ===========================
   Links
   =========================== */
a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===========================
   Navigation
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  text-decoration: none;
  opacity: 0.8;
}

.nav-logo img {
  height: 26px;
  width: auto;
}

.logo-light { display: block; }
.logo-dark  { display: none; }

[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark  { display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
  flex: 1;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  width: 34px;
  height: 30px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle svg {
  width: 15px;
  height: 15px;
}

.icon-sun,
.icon-moon {
  display: none;
}

.icon-sun.active,
.icon-moon.active {
  display: block;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  text-align: center;
  background-image: radial-gradient(circle, var(--color-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--color-bg) 100%
  );
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.1875rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--spacing-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===========================
   Page Header
   =========================== */
.page-header {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
}

.page-sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 620px;
  line-height: 1.7;
}

/* ===========================
   Sections
   =========================== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section + .section {
  padding-top: 0;
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.section-intro {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  margin-bottom: var(--spacing-2xl);
  max-width: 620px;
  line-height: 1.7;
}

/* ===========================
   Grid
   =========================== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ===========================
   Generic Cards
   =========================== */
.card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px var(--color-shadow);
}

.card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

.card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.card ul {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  padding-left: var(--spacing-lg);
  margin-top: var(--spacing-sm);
}

/* ===========================
   Product Cards (Apps & Games)
   =========================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.product-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.product-card {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--color-card-bg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.product-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 28px var(--color-shadow);
  transform: translateY(-2px);
}

.product-cover {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle, var(--color-dot) 1px, transparent 1px);
  background-size: 16px 16px;
  overflow: hidden;
}

.product-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-cover-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
}

.product-cover-placeholder span {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.5;
}

.product-info {
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

.product-info h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.25rem;
}

.product-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.product-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--spacing-sm);
}

.store-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.store-badge:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.store-badge.coming-soon {
  opacity: 0.45;
  cursor: default;
  pointer-events: none;
}

/* ===========================
   Tags
   =========================== */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 2px 7px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.card:hover .tag,
.product-card:hover .tag {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===========================
   Content Blocks (About, Work)
   =========================== */
.content-block {
  padding: var(--spacing-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.content-block:last-child {
  border-bottom: none;
}

.content-block h2 {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-md);
}

.content-block p {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 720px;
  line-height: 1.75;
}

.content-block ul {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.9;
  max-width: 680px;
  padding-left: var(--spacing-lg);
}

/* ===========================
   Fit List (Work With Us)
   =========================== */
.fit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.fit-block h3 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.fit-block.good h3 {
  color: var(--color-accent);
}

.fit-block.not h3 {
  color: var(--color-text-muted);
}

.fit-block ul {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  padding-left: var(--spacing-lg);
}

/* ===========================
   About intro
   =========================== */
.about-intro {
  font-size: 1.1875rem;
  color: var(--color-text);
  line-height: 1.75;
  max-width: 720px;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
}

/* ===========================
   CTA Banner
   =========================== */
.cta-banner {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--spacing-2xl);
  text-align: center;
  margin: var(--spacing-3xl) 0;
}

.cta-banner h2 {
  font-size: 1.625rem;
  margin-bottom: var(--spacing-sm);
}

.cta-banner p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  font-size: 1.0625rem;
}

/* ===========================
   Contact
   =========================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-row {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
  font-size: 1.0625rem;
}

.contact-row .label {
  font-weight: 600;
  min-width: 90px;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding-top: 2px;
}

.contact-row a {
  color: var(--color-text);
  font-weight: 500;
}

.contact-row a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-note {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-lg);
}

.contact-note h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--spacing-sm);
}

.contact-note p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===========================
   Buttons
   =========================== */
.btn,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1.375rem;
  border-radius: 6px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: 2px solid transparent;
  line-height: 1.4;
}

.btn {
  background-color: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.btn:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
}

/* ===========================
   Footer
   =========================== */
footer {
  background-color: var(--color-footer-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.footer-logo img {
  height: 20px;
  width: auto;
  opacity: 0.65;
}

.footer-logo .logo-light { display: block; }
.footer-logo .logo-dark  { display: none; }

[data-theme="dark"] .footer-logo .logo-light { display: none; }
[data-theme="dark"] .footer-logo .logo-dark  { display: block; }

.footer-copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-contact a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-contact a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 900px) {
  .contact-layout,
  .fit-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-3xl: 3rem;
    --nav-height: 108px;
  }

  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 0.625rem var(--spacing-md);
    gap: var(--spacing-sm);
    align-items: center;
  }

  .nav-links {
    order: 3;
    width: 100%;
    gap: var(--spacing-md);
    padding-bottom: 0.375rem;
    flex-wrap: wrap;
  }

  .nav-controls {
    margin-left: auto;
  }

  .grid-2,
  .grid-3,
  .product-grid,
  .product-grid-2 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn,
  .btn-secondary {
    justify-content: center;
  }

  .cta-banner {
    padding: var(--spacing-xl) var(--spacing-md);
  }
}