.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container { padding: 0 1.5rem; }
}

@media (min-width: 1024px) {
  .container { padding: 0 2rem; }
}

/* ========= Header ========= */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  height: var(--header-h);
  border-bottom: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header .container {
  display: flex;
  align-items: center;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  transition: transform 0.5s, box-shadow 0.5s;
}

.logo:hover .logo-icon {
  transform: scale(1.1);
  box-shadow: var(--shadow-primary-lg);
}

.logo-icon svg {
  width: 28px;
  height: 28px;
  fill: #fff;
}

.logo-icon::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  opacity: 0.3;
  filter: blur(8px);
  z-index: -1;
  transition: opacity 0.5s;
}

.logo:hover .logo-icon::after {
  opacity: 0.5;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text .brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  transition: color 0.3s;
}

.logo:hover .brand {
  color: var(--c-primary-dark);
}

.logo-text .tagline {
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--c-primary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.logo-text .tagline::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 2rem;
}

.nav a {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text-secondary);
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav a:hover,
.nav a.active {
  color: var(--c-primary);
  background: var(--c-primary-light);
}

/* Header right */
.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  background: var(--c-bg-alt);
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.search-btn:hover {
  background: var(--c-border-light);
}

.search-btn kbd {
  font-size: 0.625rem;
  padding: 0.2rem 0.4rem;
  background: var(--c-bg);
  border: 1px solid var(--c-border-light);
  border-radius: 0.25rem;
  margin-left: 0.5rem;
}

.search-btn svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  box-shadow: var(--shadow-primary-lg);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--c-bg);
  color: var(--c-text);
  border: 1px solid var(--c-border-light);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--c-text-secondary);
  transition: color 0.2s;
}

.menu-toggle:hover {
  color: var(--c-primary);
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    flex-direction: column;
    background: var(--c-bg);
    padding: 2rem;
    gap: 0.5rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav a {
    font-size: 1.125rem;
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .menu-toggle {
    display: flex;
  }

  .search-btn span,
  .search-btn kbd,
  .header-right .btn {
    display: none;
  }
}

/* ========= Footer ========= */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.95);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border-light) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.5;
}

.footer-inner {
  position: relative;
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand p {
  color: var(--c-text-muted);
  max-width: 280px;
  margin-top: 1rem;
  line-height: 1.7;
  font-size: 0.875rem;
}

.footer-socials {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.footer-socials a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.footer-socials a:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-primary);
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-text);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  padding: 0.375rem 0;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--c-primary);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--c-border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--c-text-dim);
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}