/* ============================================================
   Reusable Components — Material Design 3 Style
   ============================================================ */

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  font: var(--md-sys-typescale-label-large);
  border-radius: var(--md-sys-shape-full);
  transition: all var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  min-height: 40px;
}

.btn--primary {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.btn--primary:hover {
  background: var(--knvf-navy-light);
  box-shadow: var(--md-sys-elevation-1);
}

.btn--secondary {
  background: var(--md-sys-color-secondary);
  color: var(--md-sys-color-on-secondary);
}
.btn--secondary:hover {
  background: var(--knvf-red-light);
  box-shadow: var(--md-sys-elevation-1);
}

.btn--outlined {
  background: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}
.btn--outlined:hover {
  background: rgba(0, 43, 91, 0.08);
  border-color: var(--md-sys-color-primary);
}

.btn--text {
  background: transparent;
  color: var(--md-sys-color-primary);
  padding: 10px 12px;
}
.btn--text:hover {
  background: rgba(0, 43, 91, 0.08);
}

.btn--lg {
  padding: 14px 32px;
  font-size: 1rem;
  min-height: 48px;
}

.btn--sm {
  padding: 6px 16px;
  font-size: 0.75rem;
  min-height: 32px;
}

.btn--icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--md-sys-shape-full);
}

/* ── Ripple Effect ── */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 10%, transparent 10%);
  transform: scale(10);
  opacity: 0;
  transition: transform 0.5s, opacity 0.8s;
}

.ripple:active::after {
  transform: scale(0);
  opacity: 1;
  transition: 0s;
}

/* ── Cards ── */
.card {
  background: var(--md-sys-color-background);
  border-radius: var(--md-sys-shape-md);
  overflow: hidden;
  transition: box-shadow var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

.card--elevated {
  box-shadow: var(--md-sys-elevation-1);
}
.card--elevated:hover {
  box-shadow: var(--md-sys-elevation-3);
}

.card--outlined {
  border: 1px solid var(--md-sys-color-outline-variant);
}
.card--outlined:hover {
  border-color: var(--md-sys-color-outline);
}

.card--filled {
  background: var(--md-sys-color-surface-variant);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.card__body {
  padding: var(--space-md);
}

.card__title {
  font: var(--md-sys-typescale-title-large);
  margin-bottom: var(--space-sm);
}

.card__text {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

.card__actions {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

/* ── Chips ── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 16px;
  font: var(--md-sys-typescale-label-large);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.chip:hover {
  background: rgba(0, 43, 91, 0.08);
}

.chip--selected {
  background: var(--md-sys-color-primary-container);
  border-color: transparent;
  color: var(--md-sys-color-on-primary-container);
}

/* ── Tabs ── */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: relative;
}

.tabs__item {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface-variant);
  text-align: center;
  cursor: pointer;
  transition: color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  position: relative;
  background: none;
  border: none;
}

.tabs__item:hover {
  color: var(--md-sys-color-primary);
  background: rgba(0, 43, 91, 0.04);
}

.tabs__item--active {
  color: var(--md-sys-color-primary);
  font-weight: 600;
}

.tabs__item--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--md-sys-color-primary);
  border-radius: 3px 3px 0 0;
}

.tabs__panel {
  display: none;
  padding: var(--space-lg) 0;
}

.tabs__panel--active {
  display: block;
  animation: fadeIn var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-decelerate);
}

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font: var(--md-sys-typescale-label-medium);
  border-radius: var(--md-sys-shape-full);
  font-weight: 600;
}

.badge--upcoming {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.badge--live {
  background: var(--knvf-red);
  color: var(--knvf-white);
  animation: pulse 2s infinite;
}

.badge--ended {
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
}

.badge--club { background: #E3F2FD; color: #1565C0; }
.badge--university { background: #F3E5F5; color: #7B1FA2; }
.badge--international { background: #FFF3E0; color: #E65100; }

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  margin: var(--space-lg) 0;
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

/* ── Grid utilities ── */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

/* ── Flex utilities ── */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { justify-content: space-between; align-items: center; }
.flex--gap-sm { gap: var(--space-sm); }
.flex--gap-md { gap: var(--space-md); }
.flex--gap-lg { gap: var(--space-lg); }