/* ==========================================================================
   Cellery Design System - Components
   Buttons, Forms, Cards, Navigation
   ========================================================================== */

/* ========================================================================
   BUTTONS
   ======================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--btn-font-weight);
  line-height: 1;
  text-decoration: none;
  border: var(--border-width-2) solid transparent;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  transition-duration: var(--duration-instant);
}

.btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-teal-cellery);
  color: var(--color-blue-cellery);
  border-color: var(--color-teal-cellery);
}

.btn-primary:hover:not(:disabled) {
  background-color: oklch(68% 0.08 180);
  border-color: oklch(68% 0.08 180);
}

/* Secondary Button (Outlined) */
.btn-secondary {
  background-color: transparent;
  color: var(--color-blue-cellery);
  border-color: var(--color-blue-cellery);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-blue-cellery);
  color: var(--neutral-0);
}

/* Ghost Button (Minimal) */
.btn-ghost {
  background-color: transparent;
  color: var(--color-teal-cellery);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: rgba(117, 191, 184, 0.1);
  transform: none;
  box-shadow: none;
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-full {
  width: 100%;
}

/* Button Loading State */
.btn.is-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

.btn-primary.is-loading::after {
  border-color: var(--color-blue-cellery);
  border-top-color: transparent;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================================================
   FORM CONTROLS
   ======================================================================== */

/* Form Group */
.form-group {
  position: relative;
  margin-bottom: var(--space-5);
}

/* Labels */
.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.form-label.required::after {
  content: ' *';
  color: var(--color-error);
}

.required {
  color: var(--color-error);
}

/* Input Base */
.input {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--neutral-0);
  border: var(--input-border-width) solid var(--neutral-30);
  border-radius: var(--input-radius);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.input::placeholder {
  color: var(--neutral-50);
}

.input:hover:not(:disabled) {
  border-color: var(--neutral-50);
}

.input:focus {
  border-color: var(--color-teal-cellery);
  box-shadow: 0 0 0 3px rgba(117, 191, 184, 0.2);
  outline: none;
}

.input:disabled {
  background-color: var(--neutral-10);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Input Error State - only show after form submission attempt */
.input.is-error,
.was-validated .input:invalid,
.was-validated .select:invalid {
  border-color: var(--color-error);
}

.input.is-error:focus,
.was-validated .input:invalid:focus,
.was-validated .select:invalid:focus {
  box-shadow: 0 0 0 3px rgba(184, 66, 57, 0.2);
}

/* Input Success State */
.input.is-success {
  border-color: var(--color-success);
}

.input.is-success:focus {
  box-shadow: 0 0 0 3px rgba(89, 108, 51, 0.2);
}

/* Textarea */
textarea.input,
.textarea {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--neutral-0);
  border: var(--input-border-width) solid var(--neutral-30);
  border-radius: var(--input-radius);
  min-height: 120px;
  resize: vertical;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.textarea:focus {
  border-color: var(--color-teal-cellery);
  box-shadow: 0 0 0 3px rgba(117, 191, 184, 0.2);
  outline: none;
}

/* Select */
select.input,
.select {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--neutral-0);
  border: var(--input-border-width) solid var(--neutral-30);
  border-radius: var(--input-radius);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23595959' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 18px;
  padding-right: var(--space-10);
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.select:focus {
  border-color: var(--color-teal-cellery);
  box-shadow: 0 0 0 3px rgba(117, 191, 184, 0.2);
  outline: none;
}

/* Error Message */
.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

/* Help Text */
.form-help {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Checkbox & Radio */
.checkbox,
.radio {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox input,
.radio input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-teal-cellery);
  cursor: pointer;
}

/* ========================================================================
   CARDS
   ======================================================================== */

.card {
  position: relative;
  background-color: var(--color-surface);
  border: 1px solid var(--neutral-20);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  box-shadow: var(--shadow-sm);
}

.card-elevated {
  box-shadow: var(--shadow-md);
}

.card-interactive {
  cursor: pointer;
  transition:
    transform var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Product Card (with accent line) */
.product-card {
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-teal-cellery);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--neutral-20);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.card-body {
  margin-bottom: var(--space-4);
}

.card-footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--neutral-20);
}

/* ========================================================================
   NAVIGATION
   ======================================================================== */

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background-color: var(--neutral-0);
  transition:
    height var(--duration-normal) var(--ease-out),
    background-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.header.is-scrolled {
  height: var(--header-height-scrolled);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 16px rgba(32, 33, 64, 0.08);
}

/* Dark Header Variant */
.header-dark {
  background-color: var(--color-blue-cellery);
}

.header-dark .nav-link {
  color: var(--neutral-0);
}

.header-dark .nav-link:hover {
  color: var(--color-teal-cellery);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Centered Header Variant (for hero pages) */
.header-centered .header-inner {
  justify-content: center;
}

.header-centered .logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.header-centered .nav-desktop {
  position: absolute;
  right: var(--space-6);
}

.header-centered .hamburger {
  position: relative;
  right: auto;
}

/* Header Actions Container */
.header-actions {
  position: absolute;
  right: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Header CTA Button - hidden on mobile, shown on desktop */
.header-cta {
  display: none;
}

@media (min-width: 768px) {
  .header-cta {
    display: inline-flex;
    margin-right: 5px;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
  }
}

/* Header CTA on dark header */
.header-dark .header-cta {
  background-color: var(--color-teal-cellery);
  color: var(--color-blue-cellery);
  border-color: var(--color-teal-cellery);
}

/* Header CTA on scrolled (white background) */
.header.is-scrolled .header-cta {
  background-color: var(--color-teal-cellery);
  color: var(--color-blue-cellery);
  border-color: var(--color-teal-cellery);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img,
.logo svg {
  height: 32px;
  width: auto;
  max-width: none;
}

.logo-img {
  aspect-ratio: 1280 / 389;
}

/* Large Logo Variant */
.logo-lg img,
.logo-lg svg {
  height: 72px;
  width: auto;
  max-width: none;
}

@media (min-width: 768px) {
  .logo-lg img,
  .logo-lg svg {
    height: 90px;
  }
}

.logo-filament {
  transition: filter var(--duration-normal) var(--ease-out);
}

.logo-filament:hover {
  filter: drop-shadow(0 0 8px rgba(117, 191, 184, 0.6))
          drop-shadow(0 0 16px rgba(117, 191, 184, 0.3));
}

/* Logo swap on scroll */
.logo-scrolled {
  display: none;
  transition: filter var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.header.is-scrolled .logo-default {
  display: none;
}

.header.is-scrolled .logo-scrolled {
  display: block;
}

/* Logo hover effect for scrolled (white background) state */
.header.is-scrolled .logo-scrolled:hover {
  filter: drop-shadow(0 0 6px rgba(32, 33, 64, 0.2))
          drop-shadow(0 0 12px rgba(117, 191, 184, 0.35));
  transform: scale(1.02);
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-link {
  position: relative;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--color-teal-cellery);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-teal-cellery);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active::after {
  transform: scaleX(1);
}

/* Mobile Menu Toggle */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
  cursor: pointer;
}

/* Hamburger visible at all screen sizes */

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-blue-cellery);
  border-radius: 2px;
  transition:
    transform var(--duration-normal) var(--ease-out),
    opacity var(--duration-fast);
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hamburger color for dark header (at top) */
.header-dark .hamburger-line {
  background-color: var(--neutral-0);
}

/* Hamburger color swap on scroll (white background needs navy hamburger) */
.header.is-scrolled .hamburger-line {
  background-color: var(--color-blue-cellery);
}

/* Mobile Navigation */
.nav-mobile {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 280px;
  background-color: var(--color-blue-cellery);
  box-shadow: -4px 0 24px rgba(32, 33, 64, 0.3);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  z-index: var(--z-overlay);
  overflow-y: auto;
}

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

/* Adjust nav-mobile position when header is scrolled */
.header.is-scrolled ~ .nav-mobile {
  top: var(--header-height-scrolled);
}

.nav-mobile-cta {
  padding: var(--space-6) var(--space-6) 0;
  opacity: 0;
  transform: translateY(-10px);
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

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

.nav-mobile-cta .btn {
  width: 100%;
  justify-content: center;
}

.nav-mobile-list {
  display: flex;
  flex-direction: column;
  padding: var(--space-6) var(--space-6);
  gap: var(--space-2);
}

.nav-mobile-item {
  opacity: 0;
  transform: translateX(20px);
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.nav-mobile.is-open .nav-mobile-item {
  opacity: 1;
  transform: translateX(0);
}

.nav-mobile.is-open .nav-mobile-item:nth-child(1) { transition-delay: 100ms; }
.nav-mobile.is-open .nav-mobile-item:nth-child(2) { transition-delay: 150ms; }
.nav-mobile.is-open .nav-mobile-item:nth-child(3) { transition-delay: 200ms; }
.nav-mobile.is-open .nav-mobile-item:nth-child(4) { transition-delay: 250ms; }
.nav-mobile.is-open .nav-mobile-item:nth-child(5) { transition-delay: 300ms; }

.nav-mobile-link {
  display: block;
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--neutral-0);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.nav-mobile-link:hover {
  background-color: rgba(117, 191, 184, 0.15);
  color: var(--color-teal-cellery);
}

/* Mobile Nav Group (with submenu) */
.nav-mobile-group {
  margin-bottom: var(--space-2);
}

.nav-mobile-group-title {
  display: block;
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-teal-cellery);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.nav-mobile-submenu {
  display: flex;
  flex-direction: column;
  padding-left: var(--space-4);
}

.nav-mobile-submenu .nav-mobile-link {
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-base);
}

/* Mobile Overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(32, 33, 64, 0.5);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration-normal) var(--ease-out),
    visibility var(--duration-normal);
  z-index: calc(var(--z-overlay) - 1);
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ========================================================================
   BADGES & TAGS
   ======================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  border-radius: var(--radius-full);
}

.badge-primary {
  background-color: var(--color-teal-cellery);
  color: var(--color-blue-cellery);
}

.badge-secondary {
  background-color: var(--neutral-20);
  color: var(--color-text-secondary);
}

.badge-success {
  background-color: rgba(89, 108, 51, 0.15);
  color: var(--color-success);
}

/* ========================================================================
   DIVIDERS
   ======================================================================== */

.divider {
  height: 1px;
  background-color: var(--neutral-20);
  margin: var(--space-8) 0;
}

.divider-vertical {
  width: 1px;
  height: 100%;
  background-color: var(--neutral-20);
}

/* ========================================================================
   ICONS
   ======================================================================== */

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 32px; height: 32px; }
.icon-xl { width: 48px; height: 48px; }

/* ========================================================================
   REVEAL ANIMATIONS (for scroll-triggered effects)
   ======================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
}

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}