/* ============================================================
   RCN Components — Buttons, Cards, Forms, Badges, etc.
   ============================================================ */

/* ====== BUTTONS ====== */
.rcn-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--rcn-space-2);
    padding: 11px var(--rcn-space-5);
    border-radius: var(--rcn-radius);
    font-size: var(--rcn-text-sm);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--rcn-transition);
    border: 1.5px solid transparent;
    white-space: nowrap;
    font-family: inherit;
}
.rcn-btn:hover { transform: translateY(-1px); }
.rcn-btn:active { transform: translateY(0); }
.rcn-btn:disabled, .rcn-btn[aria-disabled="true"] {
    opacity: .5; cursor: not-allowed; transform: none !important;
}
.rcn-btn-primary {
    background: var(--rcn-brand);
    color: var(--rcn-text-on-brand);
    box-shadow: var(--rcn-shadow-brand);
}
.rcn-btn-primary:hover {
    background: var(--rcn-brand-dark);
    color: var(--rcn-text-on-brand);
    box-shadow: var(--rcn-shadow-brand-lg);
}
.rcn-btn-secondary {
    background: var(--rcn-dark);
    color: var(--rcn-text-on-dark);
}
.rcn-btn-secondary:hover {
    background: var(--rcn-dark-elevated);
    color: var(--rcn-text-on-dark);
}
.rcn-btn-outline {
    background: transparent;
    color: var(--rcn-text);
    border-color: var(--rcn-border-strong);
}
.rcn-btn-outline:hover {
    border-color: var(--rcn-brand);
    color: var(--rcn-brand);
    background: var(--rcn-brand-light);
}
.rcn-btn-ghost {
    background: transparent;
    color: var(--rcn-text-muted);
}
.rcn-btn-ghost:hover {
    background: var(--rcn-surface-alt);
    color: var(--rcn-text);
}
.rcn-btn-sm { padding: 8px var(--rcn-space-3); font-size: var(--rcn-text-xs); }
.rcn-btn-lg { padding: 14px var(--rcn-space-6); font-size: var(--rcn-text-md); border-radius: var(--rcn-radius-lg); }
.rcn-btn-xl { padding: 16px var(--rcn-space-8); font-size: var(--rcn-text-lg); border-radius: var(--rcn-radius-lg); }
.rcn-btn-block { width: 100%; }
.rcn-btn-icon {
    width: 40px; height: 40px; padding: 0; border-radius: var(--rcn-radius);
}
.rcn-btn-icon-sm { width: 32px; height: 32px; }

/* ====== CARDS ====== */
.rcn-card {
    background: var(--rcn-surface);
    border: 1px solid var(--rcn-border);
    border-radius: var(--rcn-radius-lg);
    box-shadow: var(--rcn-shadow-sm);
    overflow: hidden;
    transition: transform var(--rcn-transition), box-shadow var(--rcn-transition);
}
.rcn-card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--rcn-shadow-md);
}
.rcn-card-body { padding: var(--rcn-space-5); }
.rcn-card-header {
    padding: var(--rcn-space-4) var(--rcn-space-5);
    border-bottom: 1px solid var(--rcn-border);
    background: var(--rcn-surface-alt);
}
.rcn-card-footer {
    padding: var(--rcn-space-4) var(--rcn-space-5);
    border-top: 1px solid var(--rcn-border);
    background: var(--rcn-surface-alt);
}

/* ====== LISTING GRID (used on home, archive, single-similar) ====== */
.rcn-listing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--rcn-space-5);
}
.rcn-listing-grid-4 { grid-template-columns: repeat(4, 1fr); }
.rcn-listing-grid-3 { grid-template-columns: repeat(3, 1fr); }
.rcn-listing-grid-2 { grid-template-columns: repeat(2, 1fr); }

.rcn-listing-card {
    display: flex;
    flex-direction: column;
    background: var(--rcn-surface);
    border-radius: var(--rcn-radius-lg);
    overflow: hidden;
    box-shadow: var(--rcn-shadow-sm);
    border: 1px solid var(--rcn-border);
    text-decoration: none;
    color: inherit;
    transition: transform var(--rcn-transition), box-shadow var(--rcn-transition);
}
.rcn-listing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--rcn-shadow-md);
}
.rcn-listing-card__image {
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--rcn-surface-alt);
    overflow: hidden;
}
.rcn-listing-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 400ms ease;
}
.rcn-listing-card:hover .rcn-listing-card__image img {
    transform: scale(1.05);
}
.rcn-listing-card__badge {
    position: absolute;
    top: 12px;
    left: 12px;
}
.rcn-listing-card__body {
    padding: var(--rcn-space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
}
.rcn-listing-card__title {
    font-size: var(--rcn-text-base);
    font-weight: 700;
    color: var(--rcn-text);
    margin: 0 0 10px;
    line-height: 1.25;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: calc(2 * 1.25em);
}
.rcn-listing-card__specs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    color: var(--rcn-text-muted);
    font-size: var(--rcn-text-xs);
    margin-bottom: 12px;
}
.rcn-listing-card__specs span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.rcn-listing-card__specs svg { color: var(--rcn-text-subtle); }
.rcn-listing-card__price {
    font-family: var(--rcn-font-mono);
    font-size: var(--rcn-text-lg);
    font-weight: 700;
    color: var(--rcn-brand);
    margin-top: auto;
}

/* ====== BADGES & PILLS ====== */
.rcn-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--rcn-space-1);
    padding: 4px 10px;
    border-radius: var(--rcn-radius-full);
    font-size: var(--rcn-text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--rcn-tracking-wide);
    line-height: 1.4;
    white-space: nowrap;
}
.rcn-badge-brand { background: var(--rcn-brand); color: white; }
.rcn-badge-dark { background: var(--rcn-dark); color: white; }
.rcn-badge-success { background: var(--rcn-success-bg); color: var(--rcn-success); }
.rcn-badge-warning { background: var(--rcn-warning-bg); color: #92400E; }
.rcn-badge-danger { background: var(--rcn-danger-bg); color: var(--rcn-danger); }
.rcn-badge-info { background: var(--rcn-info-bg); color: #1E40AF; }
.rcn-badge-outline {
    background: transparent;
    border: 1.5px solid var(--rcn-border-strong);
    color: var(--rcn-text-muted);
}

/* ====== FORMS ====== */
.rcn-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--rcn-space-2);
}
.rcn-label {
    font-size: var(--rcn-text-sm);
    font-weight: 600;
    color: var(--rcn-text);
}
.rcn-label-required::after {
    content: " *";
    color: var(--rcn-brand);
}
.rcn-input, .rcn-select, .rcn-textarea {
    width: 100%;
    padding: 11px var(--rcn-space-4);
    background: var(--rcn-surface);
    border: 1.5px solid var(--rcn-border);
    border-radius: var(--rcn-radius);
    font-size: var(--rcn-text-base);
    color: var(--rcn-text);
    transition: border-color var(--rcn-transition), box-shadow var(--rcn-transition);
    font-family: inherit;
    line-height: 1.4;
}
.rcn-input:hover, .rcn-select:hover, .rcn-textarea:hover {
    border-color: var(--rcn-border-strong);
}
.rcn-input:focus, .rcn-select:focus, .rcn-textarea:focus {
    outline: none;
    border-color: var(--rcn-brand);
    box-shadow: 0 0 0 4px var(--rcn-brand-glow);
}
.rcn-input::placeholder, .rcn-textarea::placeholder {
    color: var(--rcn-text-subtle);
}
.rcn-textarea { min-height: 110px; resize: vertical; }
.rcn-input-icon {
    position: relative;
}
.rcn-input-icon .rcn-input {
    padding-left: 42px;
}
.rcn-input-icon i,
.rcn-input-icon > svg {
    position: absolute;
    left: 14px; top: 50%;
    transform: translateY(-50%);
    color: var(--rcn-text-subtle);
    font-size: 14px;
    pointer-events: none;
}
.rcn-checkbox, .rcn-radio {
    width: 18px; height: 18px;
    accent-color: var(--rcn-brand);
    cursor: pointer;
    flex-shrink: 0;
}
.rcn-check-label {
    display: inline-flex;
    align-items: center;
    gap: var(--rcn-space-2);
    cursor: pointer;
    font-size: var(--rcn-text-sm);
    color: var(--rcn-text);
}
.rcn-form-hint { font-size: var(--rcn-text-xs); color: var(--rcn-text-muted); }
.rcn-form-error { font-size: var(--rcn-text-xs); color: var(--rcn-danger); }

/* ====== AVATAR ====== */
.rcn-avatar {
    border-radius: 50%;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    border: 2px solid var(--rcn-surface);
    box-shadow: var(--rcn-shadow-xs);
}
.rcn-avatar-xs { width: 24px; height: 24px; }
.rcn-avatar-sm { width: 32px; height: 32px; }
.rcn-avatar-md { width: 48px; height: 48px; }
.rcn-avatar-lg { width: 72px; height: 72px; border-width: 3px; }
.rcn-avatar-xl { width: 120px; height: 120px; border-width: 4px; }

/* ====== ALERTS / NOTICES ====== */
.rcn-alert {
    padding: var(--rcn-space-4) var(--rcn-space-5);
    border-radius: var(--rcn-radius);
    border-left: 4px solid;
    display: flex;
    gap: var(--rcn-space-3);
    align-items: flex-start;
    font-size: var(--rcn-text-sm);
}
.rcn-alert i { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.rcn-alert-success { background: var(--rcn-success-bg); border-color: var(--rcn-success); color: #065F46; }
.rcn-alert-warning { background: var(--rcn-warning-bg); border-color: var(--rcn-warning); color: #92400E; }
.rcn-alert-danger { background: var(--rcn-danger-bg); border-color: var(--rcn-danger); color: #991B1B; }
.rcn-alert-info { background: var(--rcn-info-bg); border-color: var(--rcn-info); color: #1E40AF; }

/* ====== TABS ====== */
.rcn-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--rcn-border);
}
.rcn-tab {
    padding: var(--rcn-space-3) var(--rcn-space-5);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--rcn-text-muted);
    font-size: var(--rcn-text-sm);
    font-weight: 600;
    cursor: pointer;
    margin-bottom: -2px;
    transition: color var(--rcn-transition), border-color var(--rcn-transition);
}
.rcn-tab:hover { color: var(--rcn-text); }
.rcn-tab[aria-selected="true"],
.rcn-tab.active {
    color: var(--rcn-brand);
    border-bottom-color: var(--rcn-brand);
}

/* ====== TOAST ====== */
.rcn-toast {
    position: fixed; top: 20px; right: 20px;
    background: var(--rcn-dark); color: white;
    padding: var(--rcn-space-3) var(--rcn-space-5);
    border-radius: var(--rcn-radius);
    box-shadow: var(--rcn-shadow-lg);
    z-index: var(--rcn-z-toast);
    animation: rcnToastIn 200ms ease-out;
    max-width: 320px;
}
@keyframes rcnToastIn {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ====== LOADER / SKELETON ====== */
.rcn-skeleton {
    background: linear-gradient(90deg, var(--rcn-surface-alt) 0%, var(--rcn-border) 50%, var(--rcn-surface-alt) 100%);
    background-size: 200% 100%;
    animation: rcnShimmer 1.5s linear infinite;
    border-radius: var(--rcn-radius);
}
@keyframes rcnShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.rcn-spinner {
    width: 18px; height: 18px;
    border: 2px solid var(--rcn-border);
    border-top-color: var(--rcn-brand);
    border-radius: 50%;
    animation: rcnSpin 600ms linear infinite;
}
@keyframes rcnSpin { to { transform: rotate(360deg); } }

/* ====== DIVIDER ====== */
.rcn-divider {
    height: 1px;
    background: var(--rcn-border);
    margin: var(--rcn-space-5) 0;
    border: none;
}

/* ====== RESPONSIVE LISTING GRID ====== */
@media (max-width: 1024px) {
    .rcn-listing-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .rcn-listing-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .rcn-listing-grid { grid-template-columns: 1fr; }
}