:root {
    --color-bg: #EEF2FD;
    --color-bg-alt: #F0ECFA;
    --color-panel: #FFFFFF;
    --color-border: #E3E1F0;
    --color-border-strong: #D3D2E8;
    --color-ink: #2B2A26;
    --color-ink-soft: #6F6B60;
    --color-ink-faint: #A6A192;
    --color-accent: #2E4A44;
    --color-accent-soft: #E8EDE9;
    --color-select: #3E63D6;
    --color-select-soft: #E4E9FC;
    --color-warn: #B4522B;
    --color-warn-soft: #F6E9E2;
    --radius-sm: 6px;
    --radius-md: 10px;
    --shadow-panel: 0 1px 2px rgba(43, 42, 38, 0.04), 0 1px 12px rgba(43, 42, 38, 0.05);
    font-size: 15px;
}

* {
    box-sizing: border-box;
}

/* hidden 속성을 클래스보다 항상 우선 적용 (empty-state 등과의 display 충돌 방지) */
[hidden] {
    display: none !important;
}

html, body {
    margin: 0;
    height: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, #EEF2FD 0%, #F0ECFA 55%, #ECEFFB 100%);
    background-attachment: fixed;
    color: var(--color-ink);
    font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", -apple-system,
        BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 28px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-panel);
}

.app-header__title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* 상단 우측 안내 아이콘 (호버/포커스 시 사용법 툴팁 노출) */
.app-header__info {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    color: var(--color-ink-faint);
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.app-header__info:hover,
.app-header__info:focus-visible {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    outline: none;
}

.app-header__tooltip {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 380px;
    background: var(--color-ink);
    color: #fff;
    font-size: 12.5px;
    font-weight: 500;
    line-height: 1.6;
    padding: 18px 20px;
    border-radius: var(--radius-md);
    box-shadow: 0 6px 20px rgba(43, 42, 38, 0.18);
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
    z-index: 20;
    text-align: left;
}

.app-header__tooltip-title {
    margin: 0 0 14px;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
}

.app-header__steps {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: step;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.app-header__steps li {
    position: relative;
    padding-left: 22px;
    color: rgba(255, 255, 255, 0.86);
}

.app-header__steps li::before {
    counter-increment: step;
    content: counter(step) ".";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 700;
    color: #8FADFF;
}

.app-header__tooltip-notice {
    margin: 14px 0 0;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 11.5px;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.6);
}

.app-header__tooltip::before {
    content: "";
    position: absolute;
    top: -5px;
    right: 12px;
    width: 9px;
    height: 9px;
    background: var(--color-ink);
    transform: rotate(45deg);
}

.app-header__info:hover .app-header__tooltip,
.app-header__info:focus-visible .app-header__tooltip {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Layout ---------- */
.layout {
    display: grid;
    grid-template-columns: 300px 1fr 400px;
    gap: 18px;
    padding: 18px;
    height: calc(100vh - 64px);
}

.pane {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-panel);
    padding: 18px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.pane__title {
    margin: 0 0 14px;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-ink);
    letter-spacing: -0.01em;
}

.pane__header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.pane__header-row .pane__title {
    margin: 0;
}

/* ---------- Left: dropzone & file list ---------- */
.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 22px 12px;
    border: 1.5px dashed var(--color-border-strong);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s ease, background-color 0.15s ease;
    background: var(--color-bg);
}

.dropzone:hover,
.dropzone.is-dragover {
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
}

.dropzone__icon {
    font-size: 20px;
    color: var(--color-accent);
    font-weight: 300;
}

.dropzone__text {
    font-size: 13px;
    color: var(--color-ink-soft);
    line-height: 1.5;
}

.file-list-wrap {
    margin-top: 18px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex: 1;
}

.file-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--color-ink-faint);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 6px;
}

.file-count {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    padding: 2px 8px;
    border-radius: 999px;
    font-weight: 600;
}

.file-list {
    list-style: none;
    margin: 0;
    padding: 0;
    overflow-y: auto;
}

.pane-left-footer {
    flex: none;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--color-border);
    text-align: right;
    font-size: 11px;
    letter-spacing: 0.01em;
    color: var(--color-ink-faint);
}

.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    margin-bottom: 4px;
}

.file-item:hover {
    background: var(--color-bg);
}

.file-item.is-selected {
    background: var(--color-select-soft);
    border-color: var(--color-select);
}

.file-item__icon {
    width: 32px;
    height: 32px;
    flex: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-item__icon svg {
    width: 27px;
    height: 27px;
}

.file-item__body {
    min-width: 0;
    flex: 1;
}

.file-item__name {
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-item__meta {
    font-size: 11.5px;
    margin-top: 2px;
}

.badge {
    display: inline-block;
    padding: 1px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}

.badge--matched {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.badge--unmatched {
    background: var(--color-warn-soft);
    color: var(--color-warn);
}

.badge--pending {
    background: var(--color-bg);
    color: var(--color-ink-faint);
}

/* ---------- 전체 화면 로딩 오버레이 ---------- */
.global-loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(238, 242, 253, 0.86);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.global-loading-overlay__box {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 24px rgba(43, 42, 38, 0.12);
    padding: 28px 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.global-loading-overlay__title {
    margin-top: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-ink);
}

.global-loading-overlay__sub {
    font-size: 12px;
    color: var(--color-ink-faint);
}


.wave-loader {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    vertical-align: middle;
}

.wave-loader__scene {
    position: relative;
    width: 30px;
    height: 18px;
    overflow: hidden;
}

.wave-loader__boat {
    position: absolute;
    top: 0;
    left: 4px;
    width: 16px;
    height: 16px;
    color: var(--color-accent);
    animation: wave-loader-bob 1.6s ease-in-out infinite;
    transform-origin: 50% 90%;
}

.wave-loader__wave-track {
    position: absolute;
    bottom: 1px;
    left: 0;
    width: 200%;
    height: 5px;
    display: flex;
    animation: wave-loader-scroll 1.4s linear infinite;
}

.wave-loader__wave-track svg {
    flex: none;
    width: 30px;
    height: 5px;
}

.wave-loader__label {
    font-size: 11.5px;
    color: var(--color-ink-faint);
}

@keyframes wave-loader-bob {
    0%, 100% { transform: translateY(0) rotate(-4deg); }
    50% { transform: translateY(-2px) rotate(4deg); }
}

@keyframes wave-loader-scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-30px); }
}

/* 가운데 패널용 큰 버전 */
.wave-loader--lg .wave-loader__scene {
    width: 64px;
    height: 40px;
}

.wave-loader--lg .wave-loader__boat {
    left: 12px;
    width: 34px;
    height: 34px;
}

.wave-loader--lg .wave-loader__wave-track {
    height: 10px;
}

.wave-loader--lg .wave-loader__wave-track svg {
    width: 64px;
    height: 10px;
}

@keyframes wave-loader-scroll-lg {
    from { transform: translateX(0); }
    to { transform: translateX(-64px); }
}

.wave-loader--lg .wave-loader__wave-track {
    animation-name: wave-loader-scroll-lg;
}

/* ---------- Center: result table ---------- */
.btn {
    border: 1px solid var(--color-border-strong);
    background: var(--color-panel);
    color: var(--color-ink);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn--primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.result-table-wrap {
    overflow: auto;
    flex: 1;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.result-table th,
.result-table td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.result-table th {
    text-align: center;
    color: var(--color-ink-faint);
    font-weight: 600;
    font-size: 12px;
    position: sticky;
    top: 0;
    background: var(--color-panel);
}

/* 수정 가능한 셀 - 클릭해서 바로 값을 고칠 수 있음을 시각적으로 알려준다 */
.result-table td.cell-editable {
    cursor: text;
    border-radius: 4px;
    transition: background-color 0.12s ease, box-shadow 0.12s ease;
}

.result-table td.cell-editable:hover {
    background: var(--color-bg);
}

.result-table td.cell-editable:focus {
    outline: none;
    background: #fff;
    box-shadow: inset 0 0 0 1.5px var(--color-accent);
}

.result-table td.cell-editable--wide {
    white-space: normal;
    min-width: 340px;
}

.td-entering {
    text-align: center;
    white-space: nowrap;
}

/* 왼쪽 파일 목록에서 선택한 파일과 매칭되는 결과 표 행 강조 */
.result-table tr.is-selected-row {
    outline: 1px solid var(--color-select);
    outline-offset: -1px;
}

.result-table tr.is-selected-row td {
    background: var(--color-select-soft);
}

.entering-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
}

.table-note {
    margin-top: 12px;
    font-size: 12px;
    color: var(--color-ink-faint);
}

/* ---------- Right: preview ---------- */
.preview-frame {
    flex: 1;
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
}

/* ---------- Shared empty state ---------- */
.empty-state {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-ink-faint);
    font-size: 13px;
    line-height: 1.6;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
}