:root {
    --bg-color: #0f172a;
    --panel-bg: #1e293b;
    --border-color: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --danger-color: #ef4444;
    
    /* A4 Paper styles */
    --a4-width: 210mm;
    --a4-height: 297mm;
    --a4-padding: 20mm 20mm;
    --doc-text: #111111;
    --doc-text-light: #444444;
    --doc-border: #d1d5db;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

/* App Layout */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
    min-width: 0;
}

/* --- Control Panel (Left) --- */
.control-panel {
    width: 450px;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 15px rgba(0,0,0,0.3);
    z-index: 10;
}

.panel-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to right, #1e293b, #0f172a);
}

.panel-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.panel-header p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-word {
    background-color: transparent;
    color: #94a3b8;
    border: 1px solid #334155;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.btn-word:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: #fff;
    border-color: #475569;
}

.auth-status-container {
    padding: 12px 24px;
    background-color: #1e293b;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.auth-user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.auth-user-email {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.auth-user-credits {
    color: #60a5fa;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.auth-btn-login, .auth-btn-logout {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: opacity 0.2s;
}

.auth-btn-logout {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: #e2e8f0;
}

.auth-btn-login:hover, .auth-btn-logout:hover {
    opacity: 0.9;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--accent-glow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px dashed var(--accent-color);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    margin-bottom: 12px;
}

.btn-secondary:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.panel-content::-webkit-scrollbar {
    width: 6px;
}
.panel-content::-webkit-scrollbar-track {
    background: transparent;
}
.panel-content::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

.form-section {
    margin-bottom: 32px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.form-section h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #e2e8f0;
    display: flex;
    align-items: center;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.section-header h2 { margin-bottom: 0; border: none; padding: 0; }
.section-header .btn-secondary { width: auto; margin-bottom: 0; padding: 6px 12px; font-size: 0.8rem; }

.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: flex;
    gap: 12px;
}
.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

input[type="text"], input[type="number"], textarea {
    width: 100%;
    background-color: #0f172a;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus, input[type="number"]:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

input[type="file"] {
    width: 100%;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 6px 0;
}
input[type="file"]::file-selector-button {
    background-color: var(--border-color);
    color: var(--text-primary);
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 12px;
    font-weight: 500;
    transition: background-color 0.2s;
}
input[type="file"]::file-selector-button:hover {
    background-color: #475569;
}

.item-card {
    background-color: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    position: relative;
    animation: slideIn 0.3s ease-out;
    transition: border-color 0.2s, box-shadow 0.2s, opacity 0.2s, transform 0.2s;
}

.item-card.dragging {
    opacity: 0.4;
    border-color: var(--accent-color);
    box-shadow: 0 0 12px var(--accent-glow);
}

.item-card.drag-over {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
    transform: scale(1.01);
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.item-card-top {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.drag-handle {
    font-size: 1.2rem;
    color: #475569;
    cursor: grab;
    user-select: none;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 4px;
    transition: color 0.15s, background-color 0.15s;
}
.drag-handle:hover {
    color: var(--accent-color);
    background-color: rgba(59, 130, 246, 0.1);
}
.drag-handle:active {
    cursor: grabbing;
}

.item-index-badge {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 7px;
    min-width: 22px;
    text-align: center;
}

.item-card-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.btn-move-up, .btn-move-down {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.65rem;
    padding: 3px 7px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
    line-height: 1;
}
.btn-move-up:hover, .btn-move-down:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background-color: rgba(59, 130, 246, 0.1);
}
.btn-move-up:disabled, .btn-move-down:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-save-item {
    background: none;
    border: 1px solid #22c55e;
    color: #22c55e;
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}
.btn-save-item:hover {
    background-color: rgba(34, 197, 94, 0.15);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.3);
}
.btn-save-item.saved {
    background-color: rgba(34, 197, 94, 0.2);
    color: #86efac;
    border-color: #86efac;
}

.btn-remove-item {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;
}
.btn-remove-item:hover {
    color: var(--danger-color);
}


/* --- Preview Panel (Right) --- */
.preview-panel {
    flex: 1;
    background-color: #cbd5e1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-y: auto;
    padding: 40px;
}

.a4-paper {
    width: var(--a4-width);
    min-height: var(--a4-height);
    background-color: #ffffff;
    color: var(--doc-text);
    padding: var(--a4-padding);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    position: relative;
    font-family: 'Pretendard', sans-serif;
    word-break: keep-all;
}

/* Document Styles */
.doc-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    position: relative;
}

.header-left {
    flex: 1;
}

.header-left h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 40px;
    color: #000;
    letter-spacing: -0.5px;
    word-break: keep-all;
    white-space: pre-line;
}

.recipient-info {
    font-size: 14px;
    line-height: 1.8;
}

.info-row {
    margin-bottom: 24px;
}
.info-row .label {
    display: inline-block;
    width: 60px;
    color: #666;
}

.recipient-to {
    font-size: 14px;
}

.header-right {
    text-align: left;
    width: 250px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-area {
    height: 40px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.logo-area img {
    max-height: 100%;
    max-width: 150px;
}

.company-info-container {
    position: relative;
    width: 100%;
}

.company-details {
    font-size: 12px;
    line-height: 1.6;
    color: #333;
}
.company-details h2 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: #000;
}

.seal-image {
    position: absolute;
    top: 5px;
    right: 20px;
    width: 60px;
    height: 60px;
    opacity: 0.9;
    pointer-events: none;
    z-index: 10;
}

/* Table */
.estimate-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
    font-size: 13px;
}

.estimate-table th, .estimate-table td {
    padding: 12px 10px;
    border-bottom: 1px solid #eaeaea;
    vertical-align: top;
}

.estimate-table th {
    border-top: 2px solid #333;
    border-bottom: 1px solid #333;
    font-weight: 600;
    color: #333;
    text-align: right;
}
.estimate-table th.col-name { text-align: left; }

.estimate-table td.col-name { text-align: left; }
.estimate-table td { text-align: right; }

.item-name-text {
    font-weight: 600;
    color: #111;
    margin-bottom: 4px;
    display: block;
}
.item-desc-text {
    color: #666;
    font-size: 12px;
    white-space: pre-line;
    line-height: 1.5;
}

/* Footer */
.doc-footer {
    display: flex;
    justify-content: space-between;
    margin-top: auto;
    border-top: 1px solid #eaeaea;
    padding-top: 30px;
}

.notes-area {
    flex: 1;
    padding-right: 40px;
}
.notes-title {
    font-size: 13px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    display: block;
}
#doc-notes {
    font-size: 12px;
    color: #555;
    white-space: pre-line;
    line-height: 1.6;
}

.summary-box {
    width: 280px;
    background-color: #f8f9fa;
    border-radius: 12px;
    padding: 24px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 14px;
    color: #333;
}
.summary-row .label { color: #666; }
.summary-row .value { font-weight: 500; text-align: right; }

.summary-row.grand-total {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #ddd;
    font-size: 16px;
    font-weight: 700;
    color: #000;
}


/* --- Saved Items Panel (Right) --- */
.saved-panel {
    width: 340px;
    background-color: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 15px rgba(0,0,0,0.3);
    z-index: 10;
    flex-shrink: 0;
}

.saved-panel-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to left, #1e293b, #0f172a);
}

.saved-panel-header h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2px;
}

.saved-panel-header p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.btn-danger-sm {
    background: none;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-danger-sm:hover {
    background-color: rgba(239, 68, 68, 0.15);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

.saved-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.saved-panel-content::-webkit-scrollbar {
    width: 6px;
}
.saved-panel-content::-webkit-scrollbar-track {
    background: transparent;
}
.saved-panel-content::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

/* Empty state */
.saved-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}
.saved-empty-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    opacity: 0.5;
}
.saved-empty-state p {
    font-size: 0.9rem;
    margin-bottom: 6px;
}
.saved-empty-hint {
    font-size: 0.78rem !important;
    color: #64748b;
    line-height: 1.5;
}

/* Saved item card */
.saved-item-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    animation: slideIn 0.3s ease-out;
}
.saved-item-card:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.06);
    transform: translateX(-2px);
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.15);
}

.saved-item-card .saved-item-name {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.saved-item-card .saved-item-meta {
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    gap: 12px;
}

.saved-item-card .saved-item-desc {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 6px;
    white-space: pre-line;
    line-height: 1.4;
    max-height: 3.6em;
    overflow: hidden;
    text-overflow: ellipsis;
}

.saved-item-card .btn-delete-saved {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: #64748b;
    font-size: 1rem;
    cursor: pointer;
    line-height: 1;
    padding: 2px;
    opacity: 0;
    transition: all 0.15s ease;
}
.saved-item-card:hover .btn-delete-saved {
    opacity: 1;
}
.saved-item-card .btn-delete-saved:hover {
    color: var(--danger-color);
}

.saved-item-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.4);
    z-index: 9999;
    animation: toastIn 0.3s ease-out, toastOut 0.3s ease-in 1.7s forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(12px); }
}


/* --- Print Styles --- */
@media print {
    body * {
        visibility: hidden;
    }
    
    .app-container {
        display: block;
        height: auto;
        overflow: visible;
    }

    .no-print, .control-panel, .saved-panel {
        display: none !important;
    }
    
    .preview-panel {
        background: none;
        padding: 0;
        margin: 0;
        overflow: visible;
        display: block;
    }

    #printable-area, #printable-area * {
        visibility: visible;
    }

    #printable-area {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        margin: 0;
        padding: 15mm;
        box-shadow: none;
        background-color: white;
        box-sizing: border-box;
    }

    /* 페이지 중간에 잘리면 안 되는 요소들 */
    .doc-footer {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .summary-box {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .estimate-table tr {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    /* 테이블 헤더를 각 페이지에서 반복 */
    .estimate-table thead {
        display: table-header-group;
    }
}

@page {
    size: A4 portrait;
    /* 브라우저 기본 URL·날짜·페이지번호 헤더/풋터 제거 */
    margin: 15mm 15mm;
}