/* ==========================================================================
   Design System - Components (Dark Premium Theme)
   ========================================================================== */

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-primary-500);
  color: white;
  border-color: var(--color-primary-500);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.btn-primary:disabled,
.btn-primary.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-400);
  border-color: var(--color-primary-500);
}

.btn-secondary:hover {
  background-color: var(--color-primary-500);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.btn-secondary:disabled,
.btn-secondary.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-outline:hover {
  background-color: var(--bg-elevated);
  color: var(--color-primary-400);
  border-color: var(--color-primary-500);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: translateY(0) scale(0.97);
}

.btn-outline:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.btn-outline:disabled,
.btn-outline.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong, rgba(255,255,255,0.18));
}

.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: var(--color-primary-400);
  color: var(--color-primary-300);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0) scale(0.97);
}

.btn-ghost:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

/* Button Sizes */
.btn-lg {
  min-height: 56px;
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-sm {
  min-height: 36px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-500);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-sunken);
}

/* ==========================================================================
   Service Card
   ========================================================================== */

.service-card {
  position: relative;
  overflow: hidden;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-500);
}

.service-card-image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.service-card-image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.service-card:hover .service-card-image img {
  transform: scale(1.05);
}

.service-card-content {
  padding: var(--space-4) 0 0;
}

.service-card-title {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.service-card-excerpt {
  margin: 0 0 var(--space-4) 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.service-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ==========================================================================
   Forms (Dark Theme)
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-4);
}

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

.form-label .required {
  color: var(--color-error);
  margin-inline-start: var(--space-1);
}

.form-control {
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-elevated);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  background-color: var(--bg-surface);
}

.form-control.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px var(--color-error-glow);
}

.form-control.valid {
  border-color: var(--color-success);
}

.form-message {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
}

.form-message.error {
  color: var(--color-error);
}

.form-message.success {
  color: var(--color-success);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%238b949e' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: left var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-inline-start: var(--space-10);
}

[dir="ltr"] .form-select {
  background-position: right var(--space-3) center;
  padding-inline-start: var(--space-4);
  padding-inline-end: var(--space-10);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
  max-width: 700px;
  margin-inline: auto;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: var(--line-height-tight);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-size-4xl);
  }
}

/* ==========================================================================
   Badge Component
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.03em;
  line-height: 1;
  white-space: nowrap;
}

.badge-primary {
  background-color: rgba(51, 168, 125, 0.12);
  color: var(--color-primary-400);
  border: 1px solid rgba(51, 168, 125, 0.2);
}

.badge-dark {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.badge-light {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* ==========================================================================
   Icon Wrapper
   ========================================================================== */

.icon-wrapper {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: rgba(51, 168, 125, 0.1);
  color: var(--color-primary-400);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.icon-wrapper-lg {
  width: 64px;
  height: 64px;
  font-size: var(--font-size-2xl);
  border-radius: var(--radius-xl);
}

.icon-wrapper-sm {
  width: 36px;
  height: 36px;
  font-size: var(--font-size-base);
  border-radius: var(--radius-md);
}

/* ==========================================================================
   Arrow Link
   ========================================================================== */

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-400);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.arrow-link .arrow-icon {
  transition: transform var(--transition-fast);
  display: inline-block;
}

.arrow-link:hover {
  color: var(--color-primary-300);
}

[dir="rtl"] .arrow-link:hover .arrow-icon {
  transform: translateX(-4px);
}

[dir="ltr"] .arrow-link:hover .arrow-icon {
  transform: translateX(4px);
}

/* ==========================================================================
   Section Styling
   ========================================================================== */

.section-hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: var(--text-primary);
}

.section-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
}

.section-hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.section-hero-title {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-weight: var(--font-weight-bold);
  color: white;
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.section-hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-relaxed);
}

/* Stats Section */
.section-stats {
  background: var(--gradient-cta);
  color: white;
  padding: var(--space-12) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  text-align: center;
}

.stat-item {
  padding: var(--space-4);
}

.stat-number,
.stat-item h3 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
  color: white;
}

.stat-label,
.stat-item p {
  font-size: var(--font-size-sm);
  opacity: 0.85;
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
}

/* ==========================================================================
   Grid Systems
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Scroll Animations
   ========================================================================== */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children animations */
.animate-on-scroll.animated:nth-child(2) { transition-delay: 100ms; }
.animate-on-scroll.animated:nth-child(3) { transition-delay: 200ms; }
.animate-on-scroll.animated:nth-child(4) { transition-delay: 300ms; }
.animate-on-scroll.animated:nth-child(5) { transition-delay: 400ms; }
.animate-on-scroll.animated:nth-child(6) { transition-delay: 500ms; }

/* ==========================================================================
   Skeleton Loading
   ========================================================================== */

.skeleton {
  background: linear-gradient(90deg,
    var(--bg-elevated) 25%,
    var(--border-subtle) 50%,
    var(--bg-elevated) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   Utility: Spacing
   ========================================================================== */

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visually-hidden { position: absolute !important; clip: rect(1px, 1px, 1px, 1px) !important; }