/* Reusable Components */

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--button-padding-y) var(--button-padding-x);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--button-radius);
  transition:
    all var(--duration-base) var(--ease-smooth);
  cursor: pointer;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--duration-slow) var(--ease-out),
              height var(--duration-slow) var(--ease-out);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

/* Button Primary */
.btn--primary {
  background: #000000;
  color: #FFFFFF;
  border: none;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.4);
  background: #1a1a1a;
}

.btn--primary:active {
  transform: translateY(0);
}

/* Button Secondary */
.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: var(--border-width-medium) solid var(--color-primary);
}

.btn--secondary:hover {
  background: var(--color-primary-alpha-10);
  transform: translateY(-2px);
}

.btn--secondary:active {
  transform: translateY(0);
}

/* Button WhatsApp */
.btn--whatsapp {
  background: #25D366;
  color: #FFFFFF;
  border: none;
  box-shadow: var(--shadow-md);
}

.btn--whatsapp:hover {
  background: #20BA5A;
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -10px rgba(37, 211, 102, 0.4);
}

.btn--whatsapp:active {
  transform: translateY(0);
}

.btn--whatsapp .btn__icon {
  width: 24px;
  height: 24px;
}

/* Button Sizes */
.btn--large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.btn--small {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
}

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

/* Button Icon */
.btn__icon {
  transition: transform var(--duration-base) var(--ease-smooth);
}

.btn:hover .btn__icon {
  transform: translateX(4px);
}

/* External Link Icon */
.external-icon {
  display: inline-flex;
  align-items: center;
  margin-left: 0.25rem;
  flex-shrink: 0;
}

.external-icon svg {
  display: block;
  width: 16px;
  height: 16px;
  vertical-align: 0;
}

/* Button Loading State */
.btn--loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn__loading {
  display: none;
  align-items: center;
  gap: var(--space-xs);
}

.btn--loading .btn__text {
  display: none;
}

.btn--loading .btn__loading {
  display: flex;
}

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

.card {
  background: var(--color-surface);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  transition:
    transform var(--duration-base) var(--ease-smooth),
    box-shadow var(--duration-base) var(--ease-smooth);
}

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

/* Glass Card */
.card--glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ========================================
   FORMS
   ======================================== */

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

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

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

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: var(--border-width-thin) solid var(--input-border-color);
  border-radius: var(--input-radius);
  transition:
    border-color var(--duration-base) var(--ease-smooth),
    box-shadow var(--duration-base) var(--ease-smooth);
}

.form-input:hover,
.form-textarea:hover {
  border-color: var(--color-primary-light);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-alpha-10);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

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

/* Form Error State */
.form-input.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

/* Form Success Message */
.form-status {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  display: none;
}

.form-status.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ========================================
   SPINNER
   ======================================== */

.spinner {
  animation: spin 1s linear infinite;
}

.spinner__circle {
  stroke: currentColor;
  stroke-dasharray: 63;
  stroke-dashoffset: 50;
  stroke-linecap: round;
  fill: none;
  animation: spinner-dash 1.5s ease-in-out infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes spinner-dash {
  0% {
    stroke-dashoffset: 63;
  }
  50% {
    stroke-dashoffset: 16;
  }
  100% {
    stroke-dashoffset: 63;
  }
}

/* ========================================
   SCROLL PROGRESS INDICATOR
   ======================================== */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: var(--gradient-hero);
  z-index: var(--z-fixed);
  transition: width var(--duration-fast) var(--ease-out);
}

/* ========================================
   SKIP TO CONTENT LINK
   ======================================== */

.sr-only-focusable {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.sr-only-focusable:focus {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  width: auto;
  height: auto;
  padding: var(--space-sm) var(--space-md);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
}