/* ============================================
   GLOBAL — Layout, Nav, Footer, Forms
   ============================================ */

/* ---- Containers ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide { max-width: var(--container-wide); }

/* ---- Sections ---- */
.section {
  padding: var(--section-padding) 0;
  position: relative;
  overflow: hidden;
}
.section--dark { background: var(--color-bg-primary); }
.section--surface { background: var(--color-bg-surface); }
.section--elevated { background: var(--color-bg-elevated); }
.section--light { background: var(--color-bg-light); color: var(--color-text-dark); }
.section--accent { background: var(--gradient-accent); color: var(--color-text-on-accent); }

.section__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
}
.section__tag {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  display: inline-block;
}
.section__title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-lg);
}
.section__description {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
}
.section--light .section__description { color: var(--color-text-muted); }

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-lg) 0;
  transition: all var(--duration-normal) var(--ease-out);
  background: transparent;
}
.nav--scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-md) 0;
  border-bottom: 1px solid rgba(232, 26, 107, 0.12);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}
.nav__logo {
  height: 120px;
  width: auto;
  transition: transform var(--duration-normal) var(--ease-out);
  filter: brightness(0) invert(1);
}
.nav__logo:hover { transform: scale(1.05); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out);
}
.nav__link:hover,
.nav__link--active {
  color: var(--color-text-primary);
}
.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
}
.nav__cta:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}
.nav__toggle--active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__toggle--active span:nth-child(2) { opacity: 0; }
.nav__toggle--active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.nav__mobile {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  z-index: var(--z-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--ease-out);
}
.nav__mobile--open {
  opacity: 1;
  pointer-events: all;
}
.nav__mobile .nav__link {
  font-size: var(--fs-xl);
  color: var(--color-text-primary);
}

/* ---- Footer ---- */
.footer {
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}
.footer__brand { max-width: 300px; }
.footer__brand-description {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
  margin-top: var(--space-md);
}
.footer__links-group h4 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-primary);
  margin-bottom: var(--space-lg);
}
.footer__links-group a {
  display: block;
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  transition: color var(--duration-fast);
}
.footer__links-group a:hover { color: var(--color-accent); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}
.footer__copyright {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}
.footer__social {
  display: flex;
  gap: var(--space-md);
}
.footer__social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--duration-normal) var(--ease-out);
}
.footer__social a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* ---- Forms ---- */
.form { display: flex; flex-direction: column; gap: var(--space-lg); }
.form__group { display: flex; flex-direction: column; gap: var(--space-sm); }
.form__label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
}
.form__input,
.form__textarea {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--fs-base);
  transition: border-color var(--duration-fast);
}
.form__input:focus,
.form__textarea:focus {
  border-color: var(--color-accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.form__textarea { min-height: 150px; resize: vertical; }
.form__input::placeholder,
.form__textarea::placeholder { color: var(--color-text-muted); }

.form__success {
  display: none;
  padding: var(--space-lg);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-md);
  color: #22c55e;
  text-align: center;
}
.form__error {
  display: none;
  padding: var(--space-lg);
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  text-align: center;
}

/* ---- Back to Top ---- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: var(--z-dropdown);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-out);
  pointer-events: none;
  box-shadow: var(--shadow-glow);
}
.back-to-top--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}
.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-lg);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .nav__links { display: none !important; }
  .nav__cta { display: none !important; }
  .nav__toggle { display: flex !important; }
  .footer__inner { flex-direction: column; }
}
@media (max-width: 768px) {
  .footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
}