/* css/components.css */
/* Reusable UI components using BEM methodology */

/* ===== Button Component ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

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

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

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

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

.btn--outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
}

.btn--ghost:hover {
  background: var(--color-bg-secondary);
}

.btn--text {
  background: transparent;
  color: var(--color-text);
  padding: var(--space-xs) var(--space-sm);
}

.btn--text:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

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

.btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.btn__icon {
  font-size: 1.2em;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Tag Component ===== */
.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.tag--primary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  border-color: rgba(99, 102, 241, 0.2);
}

.tag--secondary {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-secondary);
  border-color: rgba(139, 92, 246, 0.2);
}

.tag--accent {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
  border-color: rgba(245, 158, 11, 0.2);
}

/* Status Badge */
.status-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-badge--completed {
  background: var(--color-success);
  color: white;
}

.status-badge--in-progress {
  background: var(--color-warning);
  color: white;
}

/* ===== Card Component ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.card__header {
  margin-bottom: var(--space-md);
}

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

.card__footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

/* ===== Filter Button ===== */
.filter-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  background: var(--color-border);
}

.filter-btn--active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* ===== Input Component ===== */
.input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

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

/* ===== Section Title ===== */
.section-title {
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-4xl));
  font-weight: var(--font-weight-extrabold);
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border-radius: var(--radius-full);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>');
  opacity: 0.3;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero__title {
  color: white;
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--space-xl);
  line-height: var(--line-height-relaxed);
}

/* Top Bar */
.top-bar {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: white;
  padding: 0.5rem 0;
  font-size: 0.9rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.top-bar a {
  color: white;
  text-decoration: none;
  margin: 0 1rem;
  transition: opacity 0.3s;
}

.top-bar a:hover {
  opacity: 0.8;
}

.top-bar i {
  margin-right: 0.5rem;
}

@media (max-width: 768px) {
  .top-bar {
    font-size: 0.75rem;
  }
  
  .top-bar a {
    margin: 0 0.5rem;
  }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  transition: all var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--container-padding);
}

.nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav__link {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-base);
}

.nav__link:hover {
  color: var(--color-primary);
}

/* Footer */
.footer {
  background: var(--color-bg-secondary);
  padding: var(--space-xl) 0;
  margin-top: var(--space-3xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
}