/* Components - Technical Elegance Design System
   Buttons, Cards, Forms, and UI Elements
*/

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: 16px 32px;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition:
    background var(--transition-normal),
    color var(--transition-normal),
    border-color var(--transition-normal),
    transform var(--transition-fast),
    box-shadow var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.btn:hover::before {
  opacity: 1;
}

.btn:active {
  transform: scale(0.98);
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
  box-shadow: var(--shadow-glow-pink-sm);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-glow-pink);
  color: var(--color-white);
}

/* Ghost / Outline Button */
.btn-ghost {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-white-20);
}

.btn-ghost:hover {
  background: var(--color-white-08);
  border-color: var(--color-white-40);
  color: var(--color-white);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-white);
  border: 1px solid var(--color-secondary);
}

.btn-secondary:hover {
  background: var(--color-secondary-light);
  border-color: var(--color-secondary-light);
  color: var(--color-white);
}

/* Large Button */
.btn-lg {
  padding: 20px 48px;
  font-size: var(--font-size-base);
}

/* Small Button */
.btn-sm {
  padding: 10px 20px;
  font-size: var(--font-size-xs);
}

/* Icon Button */
.btn-icon {
  padding: 12px;
  border-radius: var(--radius-md);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* Button Group */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

@media (max-width: 480px) {
  .btn-group {
    flex-direction: column;
  }

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

/* ===== Cards ===== */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition:
    border-color var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

/* Card hover glow line at top */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-primary-50) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
}

.card:hover::before {
  opacity: 1;
}

/* Card Icon */
.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-10);
  border: 1px solid var(--color-primary-20);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  color: var(--color-primary);
  transition: all var(--transition-normal);
}

.card:hover .card-icon {
  background: var(--color-primary-20);
  border-color: var(--color-primary-30);
  box-shadow: var(--shadow-glow-pink-sm);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

/* Card Number (for numbered cards) */
.card-number {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  letter-spacing: var(--letter-spacing-wider);
}

.card-title {
  font-family: var(--font-body);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--color-white);
}

.card-text {
  font-size: var(--font-size-base);
  color: var(--color-white-60);
  line-height: var(--line-height-relaxed);
}

/* Card List */
.card-list {
  list-style: none;
  padding: 0;
  margin-top: var(--space-6);
}

.card-list li {
  font-size: var(--font-size-sm);
  color: var(--color-white-40);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-list li::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.card-list li:last-child {
  border-bottom: none;
}

/* ===== Form Elements ===== */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-white-40);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--space-3);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-white);
  background: var(--color-white-03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary-50);
  background: var(--color-white-05);
  box-shadow: 0 0 0 3px var(--color-primary-10);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-white-40);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* Select Dropdown */
select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' fill-opacity='0.5' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

/* Form Row */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-16);
}

.section-header h2 {
  margin-bottom: var(--space-5);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-white-60);
}

/* ===== Section Tag / Label ===== */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-widest);
  margin-bottom: var(--space-5);
}

.section-tag::before {
  content: '';
  width: 12px;
  height: 1px;
  background: var(--color-primary);
}

/* ===== Grid Layouts ===== */
.grid {
  display: grid;
  gap: var(--space-8);
}

.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);
  }

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

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ===== Tags / Pills ===== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-white-60);
  background: var(--color-white-05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.tag:hover {
  border-color: var(--color-primary-30);
  color: var(--color-white);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ===== Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  border-radius: var(--radius-sm);
}

.badge-primary {
  background: var(--color-primary-20);
  color: var(--color-primary);
}

.badge-secondary {
  background: var(--color-secondary-20);
  color: var(--color-white-80);
}

/* ===== Dividers ===== */
.divider {
  width: 100%;
  height: 1px;
  background: var(--glass-border);
  margin: var(--space-12) 0;
}

.divider-vertical {
  width: 1px;
  height: 100%;
  background: var(--glass-border);
}

/* ===== Number/Index Display ===== */
.number-display {
  font-family: var(--font-display);
  font-size: var(--font-size-6xl);
  font-style: italic;
  color: var(--color-primary);
  line-height: 1;
}

/* ===== Quote Block ===== */
.quote {
  font-family: var(--font-display);
  font-size: var(--font-size-3xl);
  font-style: italic;
  color: var(--color-white);
  line-height: var(--line-height-snug);
  padding-left: var(--space-8);
  border-left: 2px solid var(--color-primary);
}

/* ===== Metric / Stat Display ===== */
.metric {
  text-align: center;
}

.metric-value {
  font-family: var(--font-display);
  font-size: var(--font-size-5xl);
  font-style: italic;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-white-40);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
}

/* ===== Tooltip ===== */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-white);
  background: var(--color-bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-4px);
}