/* ============================================================
   COMPONENTS — Nav, Buttons, Cards, Badges, Grids
   ============================================================ */

/* ========================
   NAVIGATION
   ======================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              backdrop-filter var(--duration-normal) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-content);
  margin: 0 auto;
  padding-inline: var(--space-lg);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.nav__links a {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text);
}

.nav__links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--glass-bg);
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.125rem;
  transition: background var(--duration-fast), color var(--duration-fast);
}

.nav__theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

/* Theme icons: show sun in dark mode, moon in light mode */
.theme-icon { display: none; }
[data-theme="dark"] .theme-icon--sun { display: block; }
[data-theme="light"] .theme-icon--moon { display: block; }

/* Hamburger */
.nav__hamburger {
  display: none;
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  gap: 5px;
}

.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
}

.nav--open .nav__hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav--open .nav__hamburger span:nth-child(2) {
  opacity: 0;
}
.nav--open .nav__hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  padding: var(--space-3xl) var(--space-lg);
  z-index: 99;
  flex-direction: column;
  gap: var(--space-xl);
}

.nav--open .nav__mobile-menu {
  display: flex;
}

.nav__mobile-menu a {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  text-decoration: none;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-subtle);
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .nav__actions .btn { display: none; }
}

/* ========================
   BUTTONS
   ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-out),
              background var(--duration-fast),
              opacity var(--duration-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm), 0 0 0 0 rgba(52, 211, 153, 0);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  box-shadow: var(--shadow-md), 0 0 20px rgba(52, 211, 153, 0.2);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-tertiary);
  background: var(--glass-bg);
}

.btn-pro {
  background: var(--gradient-pro);
  color: #fff;
}

.btn-pro:hover {
  color: #fff;
  box-shadow: var(--shadow-md), 0 0 20px rgba(124, 58, 237, 0.25);
}

.btn-lg {
  padding: 1.0625rem 2.25rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
}

.btn-icon {
  font-size: 1.125rem;
  line-height: 0;
}

/* ========================
   CARDS
   ======================== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal);
}

.card:hover {
  border-color: var(--primary-muted);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.1);
}

/* ========================
   BADGES
   ======================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.25rem 0.625rem;
  font-size: var(--text-caption);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  line-height: 1.4;
}

.badge-free {
  background: var(--primary-muted);
  color: var(--primary);
}

.badge-pro {
  background: var(--pro-muted);
  color: var(--pro);
}

.badge-popular {
  background: var(--primary);
  color: #fff;
}

/* ========================
   BENTO GRID
   ======================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.bento-grid .span-2 {
  grid-column: span 2;
}

@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-grid .span-2 {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid .span-2 {
    grid-column: span 1;
  }
}

/* ========================
   FEATURE CARD (inside bento)
   ======================== */
.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.feature-card__icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.feature-card__icon--emerald {
  background: var(--primary-muted);
  color: var(--primary);
}

.feature-card__icon--violet {
  background: var(--pro-muted);
  color: var(--pro);
}

.feature-card__icon--amber {
  background: rgba(251, 191, 36, 0.12);
  color: var(--amber-400);
}

.feature-card__icon--coral {
  background: rgba(251, 113, 133, 0.12);
  color: var(--coral-400);
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
}

.feature-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 40ch;
}

.feature-card__badges {
  display: flex;
  gap: var(--space-sm);
  margin-top: auto;
}

/* ========================
   SECTION HEADER
   ======================== */
.section-header {
  margin-bottom: var(--space-4xl);
}

.section-header__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-lg);
}

.section-header__title {
  margin-bottom: var(--space-lg);
}

.section-header__subtitle {
  font-size: var(--text-body);
  color: var(--text-secondary);
  max-width: 50ch;
  line-height: 1.7;
}

.section-header--center {
  text-align: center;
}

.section-header--center .section-header__subtitle {
  margin-inline: auto;
}

/* ========================
   FOOTER
   ======================== */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-4xl) var(--space-2xl);
  background: var(--bg-secondary);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-4xl);
  margin-bottom: var(--space-4xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  max-width: 30ch;
  line-height: 1.6;
}

.footer__col-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__links a:hover {
  color: var(--text);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }

  .footer__brand {
    grid-column: span 2;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__brand {
    grid-column: span 1;
  }
}