/* ═══════════════════════════════════════════════════════════
   ENHANCEMENT 3: SKELETON LOADING SCREENS
   ═══════════════════════════════════════════════════════════ */
@keyframes skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.skeleton {
    background: linear-gradient(90deg,
        rgba(74, 173, 224, 0.06) 25%,
        rgba(74, 173, 224, 0.12) 50%,
        rgba(74, 173, 224, 0.06) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 2s ease-in-out infinite;
    border-radius: 0;
    position: relative;
    overflow: hidden;
}

.skeleton-text {
    width: 100%;
    border-radius: 0;
}

.skeleton-text.large {
    height: 2.5rem;
    width: 60%;
}

.skeleton-text.medium {
    height: 1.25rem;
    width: 80%;
}

.skeleton-text.small {
    height: 0.875rem;
    width: 40%;
}

.skeleton-chart {
    width: 100%;
    aspect-ratio: 16 / 9;
}

.skeleton-table-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.skeleton-table-cell {
    height: 1rem;
    flex: 1;
}

body.light-mode .skeleton {
    background: linear-gradient(90deg,
        rgba(36, 137, 189, 0.06) 25%,
        rgba(36, 137, 189, 0.12) 50%,
        rgba(36, 137, 189, 0.06) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 2s ease-in-out infinite;
}

.loading-skeleton { display: none; }
.loading-active .loading-skeleton { display: block; }
.loading-active .loading-content { display: none; }

/* ── Period Year Toggle (matches dm-tabs pattern) ── */

/* ── Emission Factors: View Toggle ── */
.ef-view-toggle {
    display: inline-flex;
    gap: 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-left: auto;
}
.ef-view-btn {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color 0.2s, border-color 0.2s;
}
.ef-view-btn:hover { color: var(--text-primary); }
.ef-view-btn.active {
    color: var(--corona-bright);
    border-bottom-color: var(--corona-bright);
}

/* ── Emission Factors: Type Badges ── */
.badge-global {
    background: rgba(107, 114, 128, 0.15);
    color: #9CA3AF;
    border: 1px solid rgba(107, 114, 128, 0.25);
}
.badge-custom {
    background: rgba(129, 140, 248, 0.15);
    color: var(--corona-bright);
    border: 1px solid rgba(129, 140, 248, 0.3);
}

/* ── Emission Factors: Visibility Toggle ── */
.ef-toggle {
    position: relative;
    width: 36px;
    height: 20px;
    cursor: pointer;
}
.ef-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}
.ef-toggle-track {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    transition: background 0.2s, border-color 0.2s;
}
.ef-toggle input:checked + .ef-toggle-track {
    background: rgba(129, 140, 248, 0.25);
    border-color: var(--corona);
}
.ef-toggle-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 14px;
    height: 14px;
    background: #6B7280;
    transition: transform 0.2s, background 0.2s;
}
.ef-toggle input:checked ~ .ef-toggle-knob {
    transform: translateX(16px);
    background: var(--corona-bright);
}

/* ── Emission Factors: Action Buttons ── */
.ef-action-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    transition: color 0.2s, border-color 0.2s;
}
.ef-action-btn:hover {
    color: var(--corona-bright);
    border-color: rgba(129, 140, 248, 0.3);
}
.ef-action-btn.ef-action-delete:hover {
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
}

/* Light mode overrides */
body.light-mode .ef-view-toggle {
    border-bottom-color: rgba(0,0,0,0.08);
}
body.light-mode .ef-view-btn { color: var(--text-muted); }
body.light-mode .ef-view-btn:hover { color: #489E46; }
body.light-mode .ef-view-btn.active {
    color: #489E46;
    border-bottom-color: #489E46;
}
body.light-mode .badge-global {
    background: rgba(107, 114, 128, 0.1);
    color: #6B7280;
    border-color: rgba(107, 114, 128, 0.2);
}
body.light-mode .badge-custom {
    background: rgba(67, 56, 202, 0.08);
    color: #4338CA;
    border-color: rgba(67, 56, 202, 0.2);
}
body.light-mode .ef-toggle-track {
    background: rgba(0,0,0,0.06);
    border-color: rgba(0,0,0,0.1);
}
body.light-mode .ef-toggle input:checked + .ef-toggle-track {
    background: rgba(67, 56, 202, 0.15);
    border-color: #4338CA;
}
body.light-mode .ef-toggle-knob { background: #9CA3AF; }
body.light-mode .ef-toggle input:checked ~ .ef-toggle-knob { background: #4338CA; }
body.light-mode .ef-action-btn { color: var(--text-muted); }
body.light-mode .ef-action-btn:hover { color: #4338CA; border-color: rgba(67,56,202,0.2); }
body.light-mode .ef-action-btn.ef-action-delete:hover { color: #DC2626; border-color: rgba(220,38,38,0.2); }

/* === Tier-based Feature Gating === */
.tier-locked { position: relative; }
.tier-locked::after {
    content: 'Upgrade';
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: linear-gradient(135deg, #489E46, #2489BD);
    color: #fff;
    padding: 2px 6px;
    pointer-events: none;
    z-index: 5;
}

/* ── Billing Panel ── */
.billing-panel {
    padding: var(--space-6);
}

.billing-panel__title {
    font-size: var(--text-xl);
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.billing-panel__subtitle {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-6);
}

.billing-plan-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-5);
}

.billing-plan-card__name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.billing-plan-card__trial {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: 4px;
}

.billing-usage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.billing-usage-card {
    background: transparent;
    border: 1px solid transparent;
    border-image: var(--grad-corona-border) 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-2);
}

.billing-usage-card__icon {
    color: var(--corona);
    opacity: 0.7;
}

.billing-usage-card__label {
    font-size: var(--text-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

.billing-usage-card__value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: var(--text-2xl);
    font-weight: 700;
    background: var(--grad-corona);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

/* Subscription detail rows */
.billing-details {
    border-top: 1px solid rgba(36, 137, 189, 0.1);
    padding-top: var(--space-4);
    margin-bottom: var(--space-5);
}

.billing-details__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: 1px solid rgba(36, 137, 189, 0.06);
}

.billing-details__row:last-child {
    border-bottom: none;
}

.billing-details__label {
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.billing-details__value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* Renewal urgency */
.billing-details__value--warning {
    color: #F59E0B;
}

.billing-details__value--danger {
    color: var(--danger);
}

/* Plan includes grid */
.billing-includes {
    border-top: 1px solid rgba(36, 137, 189, 0.1);
    padding-top: var(--space-4);
    margin-bottom: var(--space-5);
}

.billing-includes__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--corona);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-3);
}

.billing-includes__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-1) var(--space-4);
}

.billing-includes__item {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) 0;
}

.billing-includes__item--active {
    color: var(--text-primary);
}

.billing-includes__check {
    color: #10B981;
    flex-shrink: 0;
}

.billing-includes__cross {
    color: var(--text-muted);
    flex-shrink: 0;
    opacity: 0.5;
}

.billing-panel > .btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.billing-upgrade-prompt {
    background: rgba(36, 137, 189, 0.04);
    border: 1px solid transparent;
    border-image: var(--grad-corona-border) 1;
    padding: var(--space-4) var(--space-5);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.billing-upgrade-prompt__icon {
    color: var(--corona);
    flex-shrink: 0;
    margin-top: 2px;
}

.billing-upgrade-prompt__title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: var(--text-base);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.billing-upgrade-prompt__desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Light mode — billing */
body.light-mode .billing-usage-card {
    background: transparent;
    border-color: rgba(36, 137, 189, 0.1);
}

body.light-mode .billing-upgrade-prompt {
    background: rgba(36, 137, 189, 0.04);
}

/* Billing status badges */
.billing-status-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.billing-status-active { background: rgba(16, 185, 129, 0.15); color: #10B981; border: 1px solid rgba(16, 185, 129, 0.3); }
.billing-status-trialing { background: rgba(36, 137, 189, 0.15); color: #7CC8E6; border: 1px solid rgba(36, 137, 189, 0.3); }
.billing-status-past_due { background: rgba(229, 83, 75, 0.15); color: #E5534B; border: 1px solid rgba(229, 83, 75, 0.3); }
.billing-status-canceled { background: rgba(229, 83, 75, 0.15); color: #E5534B; border: 1px solid rgba(229, 83, 75, 0.3); }

/* Light mode overrides */
body.light-mode .billing-status-active { background: rgba(16, 185, 129, 0.1); }
body.light-mode .billing-status-trialing { background: rgba(67, 56, 202, 0.1); color: #4338CA; border-color: rgba(67, 56, 202, 0.2); }
body.light-mode .billing-status-past_due { background: rgba(220, 38, 38, 0.1); color: #DC2626; border-color: rgba(220, 38, 38, 0.2); }
body.light-mode .billing-status-canceled { background: rgba(220, 38, 38, 0.1); color: #DC2626; border-color: rgba(220, 38, 38, 0.2); }
body.light-mode .tier-locked::after { background: linear-gradient(135deg, #4338CA, #7C3AED); }