* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    --color-primary: #C4A35A;
    --color-primary-light: #D4B36A;
    --color-primary-dark: #A88B3F;
    --color-background: #0D0D0D;
    --color-background-light: #1A1A1A;
    --color-background-lighter: #222222;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #999999;
    --color-text-muted: #666666;
    --color-border: #2A2A2A;
    --color-success: #22C55E;
    --color-danger: #DC3545;
    --color-warning: #F59E0B;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-elevated: 0 8px 24px rgba(0, 0, 0, 0.5);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    font-size: 13px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    min-height: 100vh;
    padding: 12px;
    padding-bottom: 24px;
    background: linear-gradient(180deg, #0D0D0D 0%, #0A0A0A 100%);
}

.app-header {
    text-align: center;
    padding: 16px 0 20px;
}

.logo-container {
    display: inline-block;
}

.logo-text {
    font-size: 26px;
    font-weight: bold;
    color: var(--color-primary);
    letter-spacing: 3px;
    display: block;
    text-shadow: 0 2px 8px rgba(196, 163, 90, 0.3);
}

.logo-subtitle {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    margin-top: 2px;
    display: block;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    padding: 30px;
}

.loading-spinner {
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

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

.loading-text {
    color: var(--color-text-secondary);
    font-size: 13px;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: 30px;
    animation: fadeIn 0.4s ease;
}

.error-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.error-text {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 500;
}

.error-detail {
    color: var(--color-text-muted);
    font-size: 12px;
    margin-bottom: 20px;
    text-align: center;
    max-width: 280px;
}

.retry-btn {
    padding: 10px 28px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: #000;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(196, 163, 90, 0.3);
}

.retry-btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.cert-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
    gap: 8px;
}

.badge-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(196, 163, 90, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(196, 163, 90, 0); }
}

.badge-valid .badge-icon-wrapper {
    background-color: rgba(196, 163, 90, 0.2);
    border: 2px solid var(--color-primary);
}

.badge-expired .badge-icon-wrapper {
    background-color: rgba(245, 158, 11, 0.15);
    border: 2px solid var(--color-warning);
    animation: none;
}

.badge-invalid .badge-icon-wrapper {
    background-color: rgba(220, 53, 69, 0.15);
    border: 2px solid var(--color-danger);
    animation: none;
}

.badge-icon {
    font-size: 28px;
    font-weight: bold;
}

.badge-valid .badge-icon { color: var(--color-primary); }
.badge-expired .badge-icon { color: var(--color-warning); }
.badge-invalid .badge-icon { color: var(--color-danger); }

.badge-label {
    font-size: 15px;
    font-weight: 600;
}

.badge-valid .badge-label { color: var(--color-primary); }
.badge-expired .badge-label { color: var(--color-warning); }
.badge-invalid .badge-label { color: var(--color-danger); }

.badge-desc {
    font-size: 11px;
    color: var(--color-text-muted);
}

.gold-border {
    border: 1.5px solid var(--color-primary);
    position: relative;
    box-shadow: 0 0 16px rgba(196, 163, 90, 0.08);
}

.gold-border::before,
.gold-border::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-primary);
}

.gold-border::before {
    top: -5px; left: -5px;
    border-right: none; border-bottom: none;
    border-top-left-radius: 6px;
}

.gold-border::after {
    bottom: -5px; right: -5px;
    border-left: none; border-top: none;
    border-bottom-right-radius: 6px;
}

.cert-card {
    background-color: var(--color-background-light);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--shadow-card);
    margin-bottom: 18px;
}

.cert-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.header-label-wrap {
    padding: 3px 8px;
    background-color: rgba(196, 163, 90, 0.12);
    border-radius: 4px;
}

.header-label {
    font-size: 10px;
    color: var(--color-primary);
    font-weight: 500;
}

.header-value {
    font-size: 12px;
    text-align: right;
}

.cert-no-value {
    font-family: 'Courier New', 'Consolas', monospace;
    color: var(--color-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.cert-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.25;
    margin: 14px 0;
}

.cert-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.field-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    min-width: 64px;
}

.field-value {
    font-size: 12px;
    color: var(--color-text-primary);
    text-align: right;
    flex: 1;
    word-break: break-all;
}

.field-link {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: flex-end;
    cursor: pointer;
}

.link-value {
    color: var(--color-primary);
}

.link-arrow {
    font-size: 16px;
    color: var(--color-text-muted);
}

.verify-section {
    padding: 14px 0 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.verify-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.verify-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background-color: rgba(196, 163, 90, 0.06);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(196, 163, 90, 0.15);
}

.verify-code-text {
    flex: 1;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 14px;
    color: var(--color-primary);
    letter-spacing: 1.5px;
    font-weight: 600;
    text-align: center;
}

.copy-btn {
    padding: 6px 16px;
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.copy-btn:active {
    transform: scale(0.96);
    opacity: 0.9;
}

.copy-btn-text {
    font-size: 11px;
    color: #000;
    font-weight: 500;
}

.verify-hint {
    font-size: 10px;
    color: var(--color-text-muted);
    text-align: center;
}

.verify-btn {
    width: 100%;
    padding: 10px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: #000;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(196, 163, 90, 0.2);
}

.verify-btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.verify-result {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    margin-top: 10px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.verify-success {
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.verify-failed {
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.3);
}

.verify-result-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.verify-success .verify-result-icon {
    background-color: rgba(34, 197, 94, 0.2);
    color: var(--color-success);
}

.verify-failed .verify-result-icon {
    background-color: rgba(220, 53, 69, 0.2);
    color: var(--color-danger);
}

.verify-result-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.verify-result-text {
    font-size: 13px;
    font-weight: 600;
}

.verify-success .verify-result-text { color: var(--color-success); }
.verify-failed .verify-result-text { color: var(--color-danger); }

.verify-result-desc {
    font-size: 11px;
    color: var(--color-text-muted);
}

.artwork-section {
    margin-bottom: 18px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.section-indicator {
    width: 3px;
    height: 16px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 2px;
}

.section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.artwork-card {
    background-color: var(--color-background-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
}

.artwork-image {
    width: 100%;
    background-color: var(--color-background-lighter);
}

.artwork-mock-img {
    width: 100%;
    height: auto;
    display: block;
}

.artwork-info {
    padding: 12px;
}

.artwork-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

.artwork-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
}

.meta-item {
    font-size: 11px;
    color: var(--color-text-secondary);
}

.meta-separator {
    color: var(--color-text-muted);
}

.artwork-desc {
    font-size: 11px;
    color: var(--color-text-secondary);
    line-height: 1.55;
}

.qrcode-section {
    margin-bottom: 24px;
}

.qrcode-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.qrcode-indicator {
    width: 3px;
    height: 16px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 2px;
}

.qrcode-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.qrcode-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 12px;
    background-color: var(--color-background-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
}

.qrcode-container {
    width: 160px;
    height: 160px;
    background-color: #fff;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    padding: 10px;
    overflow: hidden;
}

.qrcode-mock {
    width: 140px;
    height: 140px;
}

.qrcode-real-img {
    border-radius: 2px;
}

.qrcode-hint {
    font-size: 11px;
    color: var(--color-text-secondary);
}

.action-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    animation: fadeIn 0.4s ease;
}

.action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background-color: var(--color-background-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.action-btn:active {
    transform: scale(0.98);
    background-color: var(--color-background-lighter);
}

.action-icon {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

.app-footer {
    text-align: center;
    padding: 12px 0;
}

.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background-color: rgba(196, 163, 90, 0.06);
    border-radius: 16px;
    margin-bottom: 10px;
}

.security-icon {
    font-size: 13px;
}

.security-text {
    font-size: 10px;
    color: var(--color-text-secondary);
}

.copyright {
    font-size: 10px;
    color: var(--color-text-muted);
}

.share-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.share-dialog {
    width: 100%;
    max-width: 420px;
    background-color: var(--color-background-light);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 20px;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.share-dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.share-dialog-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.share-dialog-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 16px;
    cursor: pointer;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.share-dialog-close:active {
    background-color: var(--color-background-lighter);
}

.share-dialog-body {
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.share-dialog-desc {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.share-link-row {
    display: flex;
    gap: 8px;
}

.share-link-input {
    flex: 1;
    padding: 8px 12px;
    background-color: var(--color-background-lighter);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 12px;
    outline: none;
}

.share-link-copy {
    padding: 8px 16px;
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: #000;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.share-link-copy:active {
    opacity: 0.9;
}

.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    z-index: 9999;
    max-width: 80%;
    text-align: center;
    pointer-events: none;
}

.toast-show {
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.4s ease;
}

.certificate-content {
    animation: fadeIn 0.4s ease;
}

@media (min-width: 480px) {
    .app-container {
        max-width: 420px;
        margin: 0 auto;
    }
}

@media (max-width: 360px) {
    .app-container {
        padding: 8px;
    }

    .cert-card {
        padding: 14px;
    }

    .logo-text {
        font-size: 22px;
    }

    .artwork-image {
        background: #f5f5f5 !important;
    }

    .verify-code-text {
        font-size: 12px;
        letter-spacing: 1px;
    }
}

@media print {
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
    }

    .app-container {
        background: none !important;
        padding: 0 !important;
        max-width: 100% !important;
    }

    .app-header {
        padding: 8px 0 12px;
    }

    .logo-text {
        color: #8B7332 !important;
        text-shadow: none !important;
    }

    .logo-subtitle {
        color: #666 !important;
    }

    .loading-state,
    .error-state,
    .action-bar,
    .copy-btn,
    .verify-btn,
    .qrcode-section,
    .app-footer {
        display: none !important;
    }

    .certificate-content {
        display: block !important;
        animation: none !important;
    }

    .cert-badge {
        padding: 16px 0;
    }

    .badge-valid .badge-icon-wrapper {
        background-color: rgba(139, 115, 50, 0.15) !important;
        border-color: #8B7332 !important;
        animation: none !important;
        box-shadow: none !important;
    }

    .badge-valid .badge-icon {
        color: #8B7332 !important;
    }

    .badge-valid .badge-label {
        color: #8B7332 !important;
    }

    .badge-desc {
        color: #666 !important;
    }

    .cert-card {
        background: #fff !important;
        box-shadow: none !important;
        border: 1.5px solid #8B7332 !important;
        page-break-inside: avoid;
    }

    .cert-divider {
        background: linear-gradient(90deg, transparent, #8B7332, transparent) !important;
    }

    .cert-no-value {
        color: #8B7332 !important;
    }

    .header-label-wrap {
        background-color: rgba(139, 115, 50, 0.1) !important;
    }

    .header-label {
        color: #8B7332 !important;
    }

    .field-label {
        color: #666 !important;
    }

    .field-value {
        color: #000 !important;
    }

    .link-value {
        color: #8B7332 !important;
    }

    .verify-section {
        padding-top: 10px;
    }

    .verify-label {
        color: #666 !important;
    }

    .verify-row {
        background-color: rgba(139, 115, 50, 0.05) !important;
        border-color: rgba(139, 115, 50, 0.2) !important;
    }

    .verify-code-text {
        color: #8B7332 !important;
    }

    .verify-result {
        display: none !important;
    }

    .artwork-section {
        margin-bottom: 12px;
    }

    .artwork-card {
        background: #fff !important;
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }

    .artwork-image {
        background: #f5f5f5 !important;
    }

    .artwork-title {
        color: #000 !important;
    }

    .artwork-meta .meta-item {
        color: #666 !important;
    }

    .artwork-desc {
        color: #666 !important;
    }

    .section-title {
        color: #000 !important;
    }

    .gold-border::before,
    .gold-border::after {
        border-color: #8B7332 !important;
    }

    @page {
        margin: 1.5cm;
        size: A4;
    }
}