/* Update System - Professional CSS */
:root {
    --us-transition: all 0.25s ease-in-out;
    --us-primary-rgb: 99, 102, 241;
    --us-success-rgb: 34, 197, 94;
    --us-warning-rgb: 245, 158, 11;
    --us-danger-rgb: 239, 68, 68;
}

/* ===== VERSION BANNER ===== */
.us-version-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(var(--us-primary-rgb), 0.06), rgba(var(--us-primary-rgb), 0.02));
    border: 1px solid rgba(var(--us-primary-rgb), 0.1);
    border-radius: 12px;
    margin-bottom: 24px;
}

.us-version-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.us-version-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(var(--us-primary-rgb), 0.15), rgba(var(--us-primary-rgb), 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-primary, #6366f1);
    flex-shrink: 0;
}

.us-version-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary, #6b7280);
    margin-bottom: 4px;
}

.us-version-value {
    display: flex;
    align-items: center;
    gap: 0;
}

.us-version-number {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary, #6366f1);
}

.us-version-dot {
    width: 5px;
    height: 5px;
    background-color: var(--color-primary, #6366f1);
    border-radius: 50%;
    margin: 0 12px;
}

.us-version-date {
    font-size: 13px;
    color: var(--text-secondary, #6b7280);
}

/* ===== PRE-UPDATE CHECKLIST ===== */
.us-checklist {
    background: rgba(var(--us-warning-rgb), 0.05);
    border: 1px solid rgba(var(--us-warning-rgb), 0.15);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 24px;
}

.us-checklist-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: rgb(var(--us-warning-rgb));
    margin-bottom: 16px;
}

.us-checklist-title i {
    font-size: 20px;
}

.us-checklist-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.us-check-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--card-bg, #fff);
    border: 1px solid var(--color-border-light, #e5e7eb);
    cursor: pointer;
    transition: var(--us-transition);
    font-size: 14px;
    color: var(--text-secondary, #6b7280);
    margin: 0;
}

.us-check-item:hover {
    border-color: rgba(var(--us-primary-rgb), 0.3);
}

.us-check-item.checked {
    border-color: rgba(var(--us-success-rgb), 0.3);
    background: rgba(var(--us-success-rgb), 0.03);
    color: var(--text-primary, #1f2937);
}

.us-check-item input[type="checkbox"] {
    display: none;
}

.us-check-mark {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: 2px solid var(--color-border, #d1d5db);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--us-transition);
    font-size: 12px;
    color: transparent;
}

.us-check-item.checked .us-check-mark {
    background: rgb(var(--us-success-rgb));
    border-color: rgb(var(--us-success-rgb));
    color: #fff;
}

/* ===== UPLOAD AREA ===== */
.us-upload-area {
    border: 2px dashed var(--color-border, #d1d5db);
    border-radius: 12px;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--us-transition);
    margin-bottom: 20px;
    text-align: center;
    position: relative;
}

.us-upload-area:hover {
    border-color: var(--color-primary, #6366f1);
    background: rgba(var(--us-primary-rgb), 0.02);
}

.us-upload-area.us-file-selected {
    border-color: rgb(var(--us-success-rgb));
    border-style: solid;
    background: rgba(var(--us-success-rgb), 0.03);
}

.us-upload-icon {
    font-size: 40px;
    color: var(--text-secondary, #9ca3af);
    margin-bottom: 12px;
}

.us-upload-icon--file {
    color: rgb(var(--us-success-rgb));
}

.us-upload-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary, #374151);
    margin-bottom: 4px;
}

.us-upload-subtext {
    font-size: 13px;
    color: var(--text-secondary, #9ca3af);
}

/* ===== UPDATE BUTTON ===== */
.us-btn-update {
    background: var(--color-gradient, linear-gradient(135deg, #6366f1, #818cf8));
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--us-transition);
    box-shadow: 0 4px 12px rgba(var(--us-primary-rgb), 0.25);
}

.us-btn-update:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--us-primary-rgb), 0.35);
}

.us-btn-update:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.us-btn-update i {
    font-size: 18px;
}

/* ===== PROGRESS OVERLAY ===== */
.us-progress-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.us-progress-content {
    background: var(--card-bg, #fff);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.us-progress-spinner {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-primary, #6366f1);
    animation: us-spin 1.2s linear infinite;
}

.us-progress-spinner svg {
    width: 100%;
    height: 100%;
}

@keyframes us-spin {
    to { transform: rotate(360deg); }
}

.us-spin {
    animation: us-spin 1s linear infinite;
    display: inline-block;
}

.us-progress-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary, #1f2937);
    margin-bottom: 8px;
}

.us-progress-desc {
    font-size: 14px;
    color: var(--text-secondary, #6b7280);
    line-height: 1.6;
    margin-bottom: 28px;
}

/* Progress Steps */
.us-progress-steps {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.us-step {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary, #9ca3af);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid transparent;
    transition: var(--us-transition);
}

.us-step i {
    font-size: 14px;
}

.us-step.active {
    color: var(--color-primary, #6366f1);
    background: rgba(var(--us-primary-rgb), 0.08);
    border-color: rgba(var(--us-primary-rgb), 0.15);
}

.us-step.done {
    color: rgb(var(--us-success-rgb));
    background: rgba(var(--us-success-rgb), 0.08);
    border-color: rgba(var(--us-success-rgb), 0.15);
}

/* ===== POST-UPDATE INSTRUCTIONS ===== */
.us-instructions-intro {
    font-size: 14px;
    color: var(--text-secondary, #6b7280);
    margin-bottom: 24px;
    line-height: 1.6;
}

.us-instruction-group {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.us-instruction-step {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border-light, #f3f4f6);
}

.us-instruction-step:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.us-instruction-step:first-child {
    padding-top: 0;
}

.us-step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(var(--us-primary-rgb), 0.1), rgba(var(--us-primary-rgb), 0.05));
    color: var(--color-primary, #6366f1);
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.us-step-content {
    flex: 1;
    min-width: 0;
}

.us-step-content h6 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary, #1f2937);
    margin: 0 0 6px;
}

.us-step-content p {
    font-size: 13px;
    color: var(--text-secondary, #6b7280);
    line-height: 1.6;
    margin: 0 0 10px;
}

.us-step-content code {
    font-size: 12px;
    background: rgba(var(--us-primary-rgb), 0.08);
    color: var(--color-primary, #6366f1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
}

/* Code Block */
.us-code-block {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-gray-1, #f3f4f6);
    border: 1px solid var(--color-border-light, #e5e7eb);
    border-radius: 8px;
    padding: 10px 14px;
}

.us-code-block code {
    flex: 1;
    font-size: 13px;
    font-weight: 500;
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
    color: var(--text-primary, #1f2937);
    background: none;
    padding: 0;
}

.us-copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary, #9ca3af);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    font-size: 16px;
    transition: var(--us-transition);
    display: flex;
    align-items: center;
}

.us-copy-btn:hover {
    color: var(--color-primary, #6366f1);
    background: rgba(var(--us-primary-rgb), 0.08);
}

/* Keyboard Combo */
.us-key-combo {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

kbd {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
    color: var(--text-primary, #374151);
    background: var(--card-bg, #fff);
    border: 1px solid var(--color-border, #d1d5db);
    border-bottom-width: 2px;
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.us-key-or {
    font-size: 12px;
    color: var(--text-secondary, #9ca3af);
    margin: 0 4px;
}

.us-key-label {
    font-size: 11px;
    color: var(--text-secondary, #9ca3af);
}

/* Note Box */
.us-note-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: rgba(var(--us-primary-rgb), 0.04);
    border: 1px solid rgba(var(--us-primary-rgb), 0.1);
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 13px;
    color: var(--text-secondary, #6b7280);
    line-height: 1.5;
}

.us-note-box i {
    font-size: 18px;
    color: var(--color-primary, #6366f1);
    flex-shrink: 0;
    margin-top: 1px;
}

.us-note-box strong {
    color: var(--text-primary, #1f2937);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .us-version-banner {
        flex-direction: column;
        gap: 12px;
    }

    .us-version-value {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .us-version-dot {
        display: none;
    }

    .us-progress-steps {
        flex-wrap: wrap;
    }

    .us-step {
        font-size: 11px;
        padding: 6px 10px;
    }

    .us-instruction-step {
        flex-direction: column;
        gap: 10px;
    }

    .us-key-combo {
        gap: 4px;
    }

    .us-upload-area {
        padding: 28px 20px;
    }
}

/* ===== DARK MODE ===== */
[data-bs-theme="dark"] .us-code-block {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

[data-bs-theme="dark"] kbd {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .us-note-box {
    background: rgba(var(--us-primary-rgb), 0.06);
    border-color: rgba(var(--us-primary-rgb), 0.12);
}