/* ============================================
   ENHANCED LOADING SCREEN
   A more engaging UX for quote generation
   ============================================ */

.quote-loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.quote-loading-overlay.active {
    display: flex;
}

.loading-container {
    width: 90%;
    max-width: 500px;
    text-align: center;
    padding: 2rem;
}

.loading-icon-wrapper {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
}

.loading-ring-outer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
}

.loading-ring-inner {
    position: absolute;
    top: 15px;
    left: 15px;
    width: calc(100% - 30px);
    height: calc(100% - 30px);
    border: 3px solid transparent;
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite reverse;
}

.loading-icon-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
        transform: translate(-50%, -50%) scale(1);
    }
    50% { 
        box-shadow: 0 0 40px rgba(139, 92, 246, 0.6);
        transform: translate(-50%, -50%) scale(1.05);
    }
}

.loading-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.loading-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.loading-progress-wrapper {
    background: var(--bg-input);
    border-radius: 10px;
    height: 8px;
    overflow: hidden;
    margin-bottom: 1rem;
    position: relative;
}

.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), var(--accent-blue));
    background-size: 200% 100%;
    border-radius: 10px;
    width: 0%;
    transition: width 0.5s ease;
    animation: shimmer-progress 2s linear infinite;
}

@keyframes shimmer-progress {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.loading-progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.loading-progress-percent {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-blue);
    font-weight: 600;
}

.loading-stages {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
    text-align: left;
}

.loading-stage {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    opacity: 0.4;
    transition: all 0.3s ease;
}

.loading-stage.active {
    opacity: 1;
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

.loading-stage.complete {
    opacity: 1;
    border-color: var(--accent-green);
    background: rgba(34, 197, 94, 0.1);
}

.loading-stage-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    background: var(--bg-input);
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.loading-stage.active .loading-stage-icon {
    background: var(--accent-blue);
    color: white;
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-stage.complete .loading-stage-icon {
    background: var(--accent-green);
    color: white;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.loading-stage-text {
    flex: 1;
}

.loading-stage-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.loading-stage-detail {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.loading-stage.active .loading-stage-title {
    color: var(--accent-blue);
}

.loading-stage.complete .loading-stage-title {
    color: var(--accent-green);
}

.loading-carriers {
    margin-bottom: 2rem;
}

.loading-carriers-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.loading-carriers-track {
    display: flex;
    gap: 1rem;
    overflow: hidden;
    padding: 0.5rem 0;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.loading-carriers-inner {
    display: flex;
    gap: 1rem;
    animation: scroll-carriers 20s linear infinite;
}

@keyframes scroll-carriers {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.loading-carrier-logo {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.loading-carrier-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.loading-carrier-logo .fallback {
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.loading-tips {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.loading-tip-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-orange);
}

.loading-tip-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    min-height: 40px;
    transition: opacity 0.3s ease;
}

.loading-stats-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.loading-stat {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    text-align: center;
}

.loading-stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.loading-stat-value.blue { color: var(--accent-blue); }
.loading-stat-value.green { color: var(--accent-green); }
.loading-stat-value.purple { color: var(--accent-purple); }

.loading-stat-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 0.25rem;
}

.loading-cancel-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.loading-cancel-btn:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.loading-eta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.loading-eta strong {
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

@media (max-width: 576px) {
    .loading-container { padding: 1.5rem 1rem; }
    .loading-icon-wrapper { width: 100px; height: 100px; }
    .loading-stats-preview { grid-template-columns: 1fr; }
    .loading-stages { gap: 0.5rem; }
    .loading-stage { padding: 0.5rem 0.75rem; }
}

[data-theme="light"] .quote-loading-overlay {
    background: rgba(248, 250, 252, 0.95);
}

[data-theme="light"] .loading-carrier-logo {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}