/* =============================================
   COMPONENTS — Navbar, Buttons, Cards, Footer
   ============================================= */

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--full {
  width: 100%;
}

.btn__text,
.btn__loading,
.btn__success {
  transition: all var(--duration-normal) ease;
}

.btn__loading,
.btn__success {
  position: absolute;
  opacity: 0;
  transform: scale(0.5);
}

.btn.is-loading .btn__text { opacity: 0; transform: translateY(-10px); }
.btn.is-loading .btn__loading { opacity: 1; transform: scale(1); animation: spin 1s linear infinite; }

.btn.is-success .btn__text { opacity: 0; transform: translateY(-10px); }
.btn.is-success .btn__success { opacity: 1; transform: scale(1); }

/* Ripple Effect */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

/* ---- NAVBAR ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition: all var(--duration-normal) ease;
  display: flex;
  align-items: center;
}

.nav > .container {
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--fw-semibold);
  color: #fff;
  z-index: calc(var(--z-nav) + 1);
  transition: color var(--duration-normal) ease;
}

.nav__logo svg {
  stroke: currentColor;
}

.nav--scrolled {
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.nav--scrolled .nav__logo {
  color: var(--color-text);
}

.nav--scrolled .nav__link {
  color: var(--color-text);
}

.nav--hidden {
  transform: translateY(-100%);
}

.nav__menu {
  display: none;
}

.nav__list {
  display: flex;
  gap: var(--space-lg);
}

.nav__link {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--duration-fast) ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: scaleX(1);
}

.nav__link:hover {
  color: #fff;
}

.nav--scrolled .nav__link:hover {
  color: var(--color-accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: calc(var(--z-nav) + 1);
}

.nav__cta {
  display: none;
  padding: 0.625rem 1.5rem;
  font-size: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: #fff;
  transition: all var(--duration-normal) ease;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav--scrolled .theme-toggle {
  color: var(--color-text);
}

.nav--scrolled .theme-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

.theme-toggle__moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__sun {
  display: none;
}

[data-theme="dark"] .theme-toggle__moon {
  display: block;
}

/* Hamburger */
.hamburger {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
  width: 24px;
  height: 2px;
  background-color: #fff;
  transition: all var(--duration-normal) var(--ease-out-expo);
  transform-origin: center;
}

.nav--scrolled .hamburger__line {
  background-color: var(--color-text);
}

.hamburger.is-open .hamburger__line {
  background-color: #fff;
}

.hamburger.is-open .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-open .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.is-open .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-dark);
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: circle(0% at calc(100% - 40px) 40px);
  transition: clip-path 0.6s var(--ease-in-out-smooth);
  pointer-events: none;
}

.mobile-menu.is-open {
  clip-path: circle(150% at calc(100% - 40px) 40px);
  pointer-events: auto;
}

.mobile-menu__list {
  text-align: center;
}

.mobile-menu__link {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  color: #fff;
  padding: 0.75rem 0;
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--duration-normal) ease;
}

.mobile-menu.is-open .mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu__link:hover {
  color: var(--color-accent);
}

/* ---- SERVICE CARD ---- */
.service-card {
  position: relative;
  padding: var(--space-xl) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--duration-normal) ease;
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.service-card__icon {
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.service-icon {
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  transition: stroke-dashoffset 1.2s var(--ease-out-expo);
}

.service-card.is-visible .service-icon {
  stroke-dashoffset: 0;
}

.service-card__title {
  margin-bottom: var(--space-sm);
}

.service-card__description {
  font-size: var(--fs-small);
}

.service-card__border {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out-expo);
}

.service-card:hover .service-card__border {
  transform: scaleX(1);
}

/* ---- FOOTER ---- */
.footer {
  background: #0d0d0d;
  color: #f5f0eb;
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--fw-semibold);
  color: #f5f0eb;
  margin-bottom: var(--space-sm);
}

.footer__logo svg {
  stroke: var(--color-accent);
}

.footer__tagline {
  color: rgba(245, 240, 235, 0.5);
  font-size: var(--fs-small);
  max-width: 280px;
}

.footer h4 {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
  font-family: var(--font-body);
  font-weight: var(--fw-semibold);
}

.footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__nav a,
.footer__contact a {
  color: rgba(245, 240, 235, 0.7);
  font-size: var(--fs-small);
  transition: all var(--duration-fast) ease;
}

.footer__nav a:hover,
.footer__contact a:hover {
  color: var(--color-accent);
  transform: translateX(4px);
}

.footer__contact p {
  color: rgba(245, 240, 235, 0.7);
  font-size: var(--fs-small);
}

.footer__social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  color: rgba(245, 240, 235, 0.7);
  transition: all var(--duration-normal) ease;
}

.social-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.footer__bottom {
  padding-top: var(--space-lg);
  text-align: center;
}

.footer__bottom p {
  color: rgba(245, 240, 235, 0.35);
  font-size: var(--fs-small);
  max-width: none;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-normal) ease;
  color: var(--color-accent);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
}

.back-to-top__progress {
  position: absolute;
  top: 0;
  left: 0;
  transform: rotate(-90deg);
}

.back-to-top__circle {
  transition: stroke-dashoffset 0.1s ease;
}

.back-to-top__arrow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ---- RESPONSIVE ---- */
@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .nav__menu {
    display: block;
  }

  .nav__cta {
    display: inline-flex;
  }

  .hamburger {
    display: none;
  }
}