/* 이 페이지 및 소스는 3EA Networks에 저작권이 귀속됩니다.
무단 사용시에 저작권법 및 부정경쟁방지법에 의거하여 법적 처벌 및 손해 배상 책임을 질 수 있습니다.

This page and its source are copyrighted by 3EA Networks. Unauthorized use may result in legal punishment and damages under the Copyright Act and the Unfair Competition Prevention Act. */
/*──────────────────────────────────────────────
  Clean Settlement App - FHD Optimized (1920x1080)
  Enhanced Layout with New Color Scheme
──────────────────────────────────────────────*/

/*────────────────────────────────────────────────
  1. Design Tokens - FHD Optimized
────────────────────────────────────────────────*/
:root {
    /* Brand Colors - Enhanced */
    --brand: #6366f1;
    --brand-hov: #4f46e5;
    --brand-light: #eef2ff;

    /* New Accent Color (Orange instead of Green) */
    --accent: #b58cff;
    --accent-hov: #a16cff;
    --accent-light: #6366f1;

    /* Gray scale – light theme */
    --g900: #18181b;
    --g700: #374151;
    --g500: #6b7280;
    --g300: #d4d4d8;
    --g200: #e5e7eb;
    --g100: #f3f4f6;
    --g50: white;

    /* Typography - FHD Optimized */
    --fs-h1: 2.25rem;
    --fs-h2: 1.875rem;
    --fs-h3: 1.5rem;
    --fs-h4: 1.25rem;
    --fs-p: 1rem;
    --fs-meta: 0.875rem;

    /* Spacing - FHD Optimized */
    --sp1: 6px;
    --sp2: 8px;
    --sp3: 12px;
    --sp4: 16px;
    --sp5: 20px;
    --sp6: 24px;
    --sp8: 32px;
    --gap-sec: 40px;

    /* Radius & Shadow */
    --radius-card: 1rem;
    --radius-sm: 0.5rem;
    --shadow: 0 4px 32px rgba(0,0,0,.06),
              0 2px 12px rgba(99,102,241,.10);

    /* Glassmorphism */
    --glass-bg: rgba(255,255,255,.8);
    --glass-bg-dark: rgba(24,24,27,.8);
    --blur: 16px;

    /* Layout - FHD Optimized */
    --sidebar-width: 320px;
    --header-height: 70px;
    --max-width: 1800px;
}

[data-theme="dark"] {
    --g900: #fafafa;
    --g700: #e5e5e5;
    --g500: #c5c5c5;
    --g300: #52525b;
    --g200: #3f3f46;
    --g100: #27272a;
    --g50: #27272a;
    background: #18181b;
}

/*────────────────────────────────────────────────
  2. Reset & Base
────────────────────────────────────────────────*/
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font: 500 var(--fs-p)/1.6 Pretendard, system-ui, sans-serif;
    color: var(--g500);
    background: var(--g50);
    transition: background .3s, color .3s;
    overflow-x: hidden;
}

/*────────────────────────────────────────────────
  3. Layout System - FHD Optimized
────────────────────────────────────────────────*/
.main-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-bottom: 1px solid var(--g200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp6);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--sp4);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--sp4);
}

.main-content {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--sp6);
    width: 100%;
}

/* 2-Column Layout for FHD */
.layout-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp8);
    margin-top: var(--sp6);
}

.layout-left,
.layout-right {
    display: flex;
    flex-direction: column;
    gap: var(--sp6);
}

/*────────────────────────────────────────────────
  4. Sidebar - Fixed
────────────────────────────────────────────────*/
.sidebar {
    position: fixed;
    top: 0;
    right: -var(--sidebar-width);
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-left: 1px solid var(--g200);
    transition: right .3s ease;
    z-index: 1000;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all .3s ease;
    z-index: 999;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-header {
    padding: var(--sp6);
    border-bottom: 1px solid var(--g200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header h3 {
    color: var(--g900);
    margin: 0;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--g500);
    cursor: pointer;
    padding: var(--sp2);
    border-radius: var(--radius-sm);
    transition: background .2s;
}

.sidebar-close:hover {
    background: var(--g100);
}

.sidebar-content {
    padding: var(--sp6);
}

.help-section {
    margin-bottom: var(--sp6);
}

.help-section h4 {
    color: var(--g900);
    margin-bottom: var(--sp3);
    font-size: var(--fs-h4);
}

.shortcut-list {
    display: flex;
    flex-direction: column;
    gap: var(--sp2);
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--sp2) var(--sp3);
    background: var(--g100);
    border-radius: var(--radius-sm);
}

.shortcut-key {
    background: var(--brand);
    color: white;
    padding: var(--sp1) var(--sp2);
    border-radius: 4px;
    font-size: var(--fs-meta);
    font-weight: 600;
}

.shortcut-desc {
    font-size: var(--fs-meta);
    color: var(--g700);
}

.usage-list,
.tips-list {
    padding-left: var(--sp4);
    color: var(--g700);
}

.usage-list li,
.tips-list li {
    margin-bottom: var(--sp2);
    font-size: var(--fs-meta);
}

.app-info {
    background: var(--g100);
    padding: var(--sp4);
    border-radius: var(--radius-sm);
}

.app-info p {
    margin-bottom: var(--sp2);
    font-size: var(--fs-meta);
    color: var(--g700);
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp2);
    border-radius: var(--radius-sm);
    transition: background .2s;
}

.sidebar-toggle:hover {
    background: var(--g100);
}

.sidebar-toggle span {
    width: 20px;
    height: 2px;
    background: var(--g700);
    border-radius: 1px;
    transition: all .3s;
}

/*────────────────────────────────────────────────
  5. Typography
────────────────────────────────────────────────*/
h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--g900);
    margin-bottom: var(--sp3);
    transition: color .3s;
}

h1 {
    font-size: var(--fs-h1);
    color: var(--brand);
}

h2 {
    font-size: var(--fs-h2);
}

h3 {
    font-size: var(--fs-h3);
}

h4 {
    font-size: var(--fs-h4);
    font-weight: 600;
    color: var(--g700);
}

/*────────────────────────────────────────────────
  6. Card Component
────────────────────────────────────────────────*/
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-radius: var(--radius-card);
    box-shadow: var(--shadow);
    padding: var(--sp6);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .6s ease, transform .6s ease;
    margin-bottom: var(--sp6);
}

.card.visible {
    opacity: 1;
    transform: none;
}

/*────────────────────────────────────────────────
  7. Title Section
────────────────────────────────────────────────*/
.title-section {
    text-align: center;
}

.app-title {
    font-size: var(--fs-h1);
    color: var(--brand);
    margin: 0;
}

.title-year {
    font-weight: 400;
}

.title-input {
    width: 100%;
    max-width: 600px;
    padding: var(--sp4) var(--sp6);
    font-size: var(--fs-h3);
    font-weight: 600;
    text-align: center;
    background: var(--g50);
    border: 2px solid var(--g200);
    border-radius: var(--radius-card);
    color: var(--g900);
    transition: border-color .3s;
    outline: none;
    margin: 0 auto;
    display: block;
}

.title-input:focus {
    border-color: var(--brand);
}

.title-input::placeholder {
    color: var(--g500);
}

/*────────────────────────────────────────────────
  8. Toggle
────────────────────────────────────────────────*/
.theme-toggle-container {
    display: flex;
    align-items: center;
}

.toggle {
    display: flex;
    align-items: center;
    gap: var(--sp3);
    cursor: pointer;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    position: relative;
    width: 51px;
    height: 27px;
    border-radius: 9999px;
    background: var(--g200);
    transition: .2s;
}

.toggle-thumb {
    position: absolute;
    left: 4px;
    top: 4px;
    width: 19px;
    height: 19px;
    background: #fff;
    border-radius: 50%;
    transition: .25s;
}

.toggle input:checked + .toggle-track {
    background: var(--brand);
}

.toggle input:checked + .toggle-track .toggle-thumb {
    transform: translateX(24px);
}

.toggle-label {
    font-size: var(--fs-meta);
    color: var(--g700);
    font-weight: 600;
}

/*────────────────────────────────────────────────
  9. Enhanced Tabs with Working Indicator
────────────────────────────────────────────────*/
.nav-tabs {
    display: flex;
    position: relative;
    background: var(--g100);
    border-radius: var(--radius-card);
    padding: var(--sp2);
    margin-bottom: 0;
}

.nav-tab {
    flex: 1;
    padding: var(--sp4) var(--sp6);
    border: none;
    background: none;
    font: 600 var(--fs-h4)/1 Pretendard;
    cursor: pointer;
    color: var(--g500);
    transition: all .3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp2);
    border-radius: calc(var(--radius-card) - var(--sp2));
   position: relative;
   z-index: 2;
}

.nav-tab.active {
   color: var(--brand);
   background: var(--g50);
   box-shadow: var(--shadow);
   transform: translateY(-2px);
}

.nav-tab:hover:not(.active) {
   color: var(--brand);
   background: rgba(255, 255, 255, 0.5);
}

.tab-icon {
   font-size: var(--fs-h4);
}

.tab-indicator {
   position: absolute;
   bottom: var(--sp2);
   height: 3px;
   background: var(--brand);
   border-radius: 2px;
   transition: all .3s ease;
   z-index: 1;
}

/*────────────────────────────────────────────────
 10. Buttons - Enhanced with New Colors
────────────────────────────────────────────────*/
.btn {
   position: relative;
   overflow: hidden;
   display: inline-flex;
   align-items: center;
   justify-content: center;
   gap: var(--sp2);
   padding: var(--sp3) var(--sp6);
   font: 500 var(--fs-p)/1 Pretendard;
   border: none;
   border-radius: 9999px;
   cursor: pointer;
   transition: all .15s;
   background: var(--g100);
   color: var(--g700);
   outline: none;
   white-space: nowrap;
}

.btn:active {
   transform: scale(.97);
}

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

.btn-primary:hover {
   background: var(--brand-hov);
   transform: translateY(-1px);
   box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
   background: var(--g100);
   color: var(--g700);
}

.btn-secondary:hover {
   background: var(--g200);
   transform: translateY(-1px);
}

.btn-outline {
   background: none;
   border: 2px solid var(--brand);
   color: var(--brand);
}

.btn-outline:hover {
   background: var(--brand);
   color: #fff;
   transform: translateY(-1px);
}

/* New Accent Button (Orange instead of Green) */
.btn-accent {
   background: var(--accent);
   color: #fff;
}

.btn-accent:hover {
   background: var(--accent-hov);
   transform: translateY(-1px);
   box-shadow: 0 4px 20px rgba(22, 26, 249, 0.3);
}

.btn-sm {
   padding: var(--sp2) var(--sp4);
   font-size: var(--fs-meta);
}

.btn-icon {
   font-size: var(--fs-p);
}

/* Ripple effect */
.btn:not(.no-ripple)::after {
   content: '';
   position: absolute;
   left: 50%;
   top: 50%;
   width: 100%;
   padding-top: 100%;
   border-radius: 50%;
   transform: translate(-50%, -50%) scale(0);
   opacity: .35;
   background: #fff;
   mix-blend-mode: overlay;
   pointer-events: none;
   transition: transform .5s, opacity .5s;
}

.btn:not(.no-ripple):hover::after {
   transform: translate(-50%, -50%) scale(1.9);
   opacity: 0;
}

/*────────────────────────────────────────────────
 11. Input Fields
────────────────────────────────────────────────*/
.input,
.amount-input,
.item-input,
.person-name-input,
.adjustment-input,
.description-input {
   width: 100%;
   padding: var(--sp3) var(--sp4);
   background: var(--g100);
   border: none;
   border-radius: 8px;
   transition: background .3s, border-color .3s;
   color: var(--g900);
   border: 2px solid transparent;
   font-family: inherit;
   outline: none;
}

.input:focus,
.amount-input:focus,
.item-input:focus,
.person-name-input:focus,
.adjustment-input:focus,
.description-input:focus {
   background: #fff;
   border-color: var(--brand-light);
}

.amount-input {
   width: 120px;
   text-align: right;
   font-weight: 600;
}

.item-input {
   background: transparent;
   border: 1px solid var(--g300);
   font-weight: 600;
}

.person-name-input {
   text-align: center;
   font-weight: 600;
   font-size: var(--fs-meta);
   width: 120px;
   background: var(--g50);
}

/*────────────────────────────────────────────────
 12. Enhanced Tables with Rounded Corners
────────────────────────────────────────────────*/
.table-container {
   overflow: hidden;
   border-radius: var(--radius-card);
   border: 1px solid var(--g200);
}

.table-header {
   padding: var(--sp4) var(--sp6);
   background: var(--g100);
   border-bottom: 1px solid var(--g200);
}

.section-title {
   font-size: var(--fs-h3);
   font-weight: 700;
   color: var(--g900);
   margin: 0;
}

.table-scroll {
   overflow-x: auto;
   max-height: 500px;
}

.settlement-table,
.additional-table,
.adjustment-table,
.result-table {
   width: 100%;
   border-collapse: collapse;
   background: var(--g50);
}

/* Rounded table corners */
.rounded-table {
   border-radius: var(--radius-card);
   overflow: hidden;
}

.rounded-table th:first-child {
   border-top-left-radius: var(--radius-sm);
}

.rounded-table th:last-child {
   border-top-right-radius: var(--radius-sm);
}

.rounded-table tbody tr:last-child td:first-child {
   border-bottom-left-radius: var(--radius-sm);
}

.rounded-table tbody tr:last-child td:last-child {
   border-bottom-right-radius: var(--radius-sm);
}

.settlement-table th,
.additional-table th,
.adjustment-table th,
.result-table th {
   background: var(--brand);
   color: white;
   padding: var(--sp3) var(--sp4);
   text-align: center;
   font-weight: 600;
   font-size: var(--fs-meta);
   white-space: nowrap;
   position: sticky;
   top: 0;
   z-index: 10;
}

.settlement-table td,
.additional-table td,
.adjustment-table td,
.result-table td {
   padding: var(--sp3) var(--sp2);
   text-align: center;
   border-bottom: 1px solid var(--g200);
   vertical-align: middle;
   transition: background .15s;
}

/* Remove border from last row */
.settlement-table tbody tr:last-child td,
.additional-table tbody tr:last-child td,
.adjustment-table tbody tr:last-child td,
.result-table tbody tr:last-child td {
   border-bottom: none;
}

.settlement-table tbody tr:hover,
.additional-table tbody tr:hover,
.adjustment-table tbody tr:hover,
.result-table tbody tr:hover {
   background: var(--brand-light);
}

.table-footer {
   padding: var(--sp4);
   text-align: center;
   background: var(--g50);
   border-top: 1px solid var(--g200);
}

/* Special styling for item columns */
.item-column {
   background: var(--brand-light);
   font-weight: 600;
   text-align: left !important;
   width: 180px;
   min-width: 180px;
   position: sticky;
   left: 0;
   z-index: 5;
   border-right: 2px solid var(--brand);
}

.action-column {
   width: 100px;
   min-width: 100px;
}

/*────────────────────────────────────────────────
 13. Settings Section
────────────────────────────────────────────────*/
.settings-section {
   background: var(--brand-light);
}

.settings-buttons {
   display: flex;
   justify-content: center;
   gap: var(--sp3);
   flex-wrap: wrap;
}

/*────────────────────────────────────────────────
 14. Special Sections
────────────────────────────────────────────────*/
.adjustment-section {
   background: var(--g50);
   border: 1px solid var(--g200);
}

.additional-settlement-section {
   background: var(--g50);
   border: 1px solid var(--g200);
}

.result-section {
   background: var(--brand-light);
}

.save-section {
   background: var(--g50);
   text-align: center;
}

.section-header {
   text-align: center;
   margin-bottom: var(--sp4);
}

.section-description {
   color: var(--g500);
   font-size: var(--fs-meta);
   margin-top: var(--sp2);
}

/*────────────────────────────────────────────────
 15. Saved List Section
────────────────────────────────────────────────*/
.saved-list-header {
   background: var(--g50);
   border: 1px solid var(--g200);
   padding: var(--sp6);
}

.saved-list-header h2 {
   color: var(--g900);
   font-size: var(--fs-h2);
   margin-bottom: var(--sp5);
   text-align: center;
}

.list-controls {
   display: flex;
   justify-content: space-between;
   align-items: center;
   gap: var(--sp4);
   flex-wrap: wrap;
   margin-bottom: var(--sp4);
}

.search-container {
   position: relative;
   flex: 1;
   max-width: 300px;
}

.search-icon {
   position: absolute;
   left: var(--sp3);
   top: 50%;
   transform: translateY(-50%);
   color: var(--g500);
   pointer-events: none;
}

.search-container .input {
   padding-left: var(--sp8);
   border-radius: 9999px;
}

.control-buttons {
   display: flex;
   gap: var(--sp2);
}

.saved-list-stats {
   background: var(--brand-light);
   color: var(--brand);
   padding: var(--sp2) var(--sp4);
   border-radius: 9999px;
   font-size: var(--fs-meta);
   font-weight: 600;
   text-align: center;
}

.saved-list-container {
   background: var(--g100);
   border-radius: var(--radius-card);
   padding: var(--sp4);
   max-height: 600px;
   overflow-y: auto;
}

.saved-item {
   background: var(--g50);
   border: 1px solid var(--g200);
   border-radius: var(--radius-card);
   padding: var(--sp5);
   margin-bottom: var(--sp4);
   transition: border-color .3s;
   cursor: pointer;
}

.saved-item:hover {
   border-color: var(--brand);
}

.saved-item.selected {
   border-color: var(--brand);
   background: var(--brand-light);
}

.saved-item-header {
   display: flex;
   justify-content: space-between;
   align-items: flex-start;
   margin-bottom: var(--sp3);
}

.saved-item-title {
   font-size: var(--fs-h4);
   font-weight: 700;
   color: var(--g900);
   margin: 0;
}

.saved-item-actions {
   display: flex;
   gap: var(--sp2);
}

.item-action-btn {
   padding: var(--sp2) var(--sp3);
   font-size: var(--fs-meta);
   border-radius: var(--sp2);
   border: none;
   cursor: pointer;
   font-weight: 600;
   transition: transform .15s;
}

.item-action-btn:active {
   transform: scale(.95);
}

.load-btn {
   background: var(--brand);
   color: white;
}

.load-btn:hover {
   background: var(--brand-hov);
   transform: translateY(-1px);
}

.delete-btn {
   background: var(--g300);
   color: var(--g700);
}

.delete-btn:hover {
   background: var(--g500);
   color: white;
}

.saved-item-info {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: var(--sp3);
   color: var(--g500);
   font-size: var(--fs-meta);
}

.saved-item-detail {
   display: flex;
   flex-direction: column;
   gap: var(--sp1);
}

.detail-label {
   font-weight: 600;
   color: var(--g700);
   font-size: var(--fs-meta);
   text-transform: uppercase;
   letter-spacing: 0.05em;
}

.detail-value {
   color: var(--g500);
   font-weight: 500;
}

/*────────────────────────────────────────────────
 16. Amount Colors
────────────────────────────────────────────────*/
.amount-paid {
   color: var(--brand);
   font-weight: 700;
}

.amount-owe {
   color: #ef4444;
   font-weight: 700;
}

.amount-total {
   color: var(--g900);
   font-weight: 700;
}

.amount-adjustment {
   color: var(--g700);
   font-weight: 700;
}

.amount-additional {
   color: var(--g700);
   font-weight: 700;
}

.total-amount {
   font-size: var(--fs-meta);
   color: var(--g500);
   margin-top: var(--sp1);
   font-weight: 500;
}

/*────────────────────────────────────────────────
 17. Section Content
────────────────────────────────────────────────*/
.section-content {
   display: none;
}

.section-content.active {
   display: block;
   animation: fadeIn .4s ease;
   margin-top: 1rem;
}

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

/*────────────────────────────────────────────────
 18. Empty States
────────────────────────────────────────────────*/
.empty-list-message {
   text-align: center;
   padding: var(--sp8) var(--sp6);
   color: var(--g500);
}

.empty-icon {
   font-size: 4rem;
   margin-bottom: var(--sp5);
   opacity: 0.5;
}

.empty-text {
   font-size: var(--fs-h4);
   font-weight: 700;
   margin-bottom: var(--sp3);
   color: var(--g700);
}

.empty-subtext {
   font-size: var(--fs-meta);
   color: var(--g500);
}

/*────────────────────────────────────────────────
 19. Save Buttons
────────────────────────────────────────────────*/
.save-buttons {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
   gap: var(--sp3);
   margin-top: var(--sp4);
}

/*────────────────────────────────────────────────
 20. Loading & Toast
────────────────────────────────────────────────*/
.loading-overlay {
   position: fixed;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
   background: rgba(255, 255, 255, 0.9);
   display: flex;
   align-items: center;
   justify-content: center;
   z-index: 9999;
}

.loading-spinner {
   display: flex;
   flex-direction: column;
   align-items: center;
   gap: var(--sp4);
   background: var(--g50);
   padding: var(--sp8);
   border-radius: var(--radius-card);
   box-shadow: var(--shadow);
}

.spinner {
   width: 45px;
   height: 45px;
   border: 4px solid var(--g200);
   border-top-color: var(--brand);
   border-radius: 50%;
   animation: spin .8s linear infinite;
}

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

.loading-text {
   font-size: var(--fs-p);
   color: var(--g700);
}

.toast-container {
   position: fixed;
   top: var(--sp6);
   right: var(--sp6);
   z-index: 10000;
   display: flex;
   flex-direction: column;
   gap: var(--sp3);
}

/* Toast Animations */
@keyframes slideIn {
   from {
       opacity: 0;
       transform: translateX(100%);
   }
   to {
       opacity: 1;
       transform: translateX(0);
   }
}

@keyframes slideOut {
   from {
       opacity: 1;
       transform: translateX(0);
   }
   to {
       opacity: 0;
       transform: translateX(100%);
   }
}

/*────────────────────────────────────────────────
 21. Search Highlight
────────────────────────────────────────────────*/
.search-highlight {
   background-color: var(--brand-light);
   color: var(--brand);
   font-weight: 700;
   padding: 2px 4px;
   border-radius: 4px;
}

/*────────────────────────────────────────────────
 22. Dark Theme
────────────────────────────────────────────────*/
[data-theme="dark"] .card,
[data-theme="dark"] .app-header,
[data-theme="dark"] .sidebar {
   background: var(--glass-bg-dark);
}

[data-theme="dark"] .input,
[data-theme="dark"] .amount-input,
[data-theme="dark"] .item-input,
[data-theme="dark"] .adjustment-input,
[data-theme="dark"] .description-input {
   background: var(--g300);
   border-color: var(--g300);
   color: var(--g900);
}

[data-theme="dark"] .input:focus,
[data-theme="dark"] .amount-input:focus,
[data-theme="dark"] .item-input:focus,
[data-theme="dark"] .adjustment-input:focus,
[data-theme="dark"] .description-input:focus {
   background: var(--g200);
}

[data-theme="dark"] .btn-secondary {
   background: var(--g300);
   color: var(--g900);
}

[data-theme="dark"] .btn-secondary:hover {
   background: var(--g200);
}

/*────────────────────────────────────────────────
 23. Responsive Design - FHD Optimized
────────────────────────────────────────────────*/
@media (max-width: 1600px) {
   .main-content {
       max-width: 1400px;
   }
}

@media (max-width: 1400px) {
   .layout-container {
       grid-template-columns: 1fr;
       gap: var(--sp6);
   }
   
   .main-content {
       max-width: 1200px;
   }
}

@media (max-width: 1200px) {
   .header-content {
       padding: 0 var(--sp4);
   }
   
   .main-content {
       padding: var(--sp4);
       max-width: 100%;
   }
}

@media (max-width: 768px) {
   .app-header {
       height: 60px;
   }
   
   .header-content {
       padding: 0 var(--sp3);
   }
   
   .main-content {
       padding: var(--sp3);
   }
   
   .title-input {
       font-size: var(--fs-h4);
   }
   
   .nav-tab {
       padding: var(--sp3) var(--sp4);
       font-size: var(--fs-meta);
       flex-direction: column;
       gap: var(--sp1);
   }
   
   .settings-buttons {
       flex-direction: column;
       align-items: center;
   }
   
   .save-buttons {
       grid-template-columns: 1fr;
   }
   
   .list-controls {
       flex-direction: column;
       align-items: stretch;
   }
   
   .search-container {
       max-width: none;
   }
   
   .control-buttons {
       justify-content: center;
   }
   
   .amount-input {
       width: 100px;
       font-size: var(--fs-meta);
   }
   
   .person-name-input {
       width: 100px;
       font-size: var(--fs-meta);
   }
   
   .saved-item-info {
       grid-template-columns: 1fr;
   }
   
   .sidebar {
       width: 280px;
       right: -280px;
   }
   
   .app-title {
       font-size: var(--fs-h3);
   }
}

@media (max-width: 480px) {
   .nav-tab {
       font-size: 10px;
       padding: var(--sp2);
   }
   
   .btn {
       font-size: var(--fs-meta);
       padding: var(--sp2) var(--sp3);
   }
   
   .section-title {
       font-size: var(--fs-h4);
   }
   
   .amount-input {
       width: 50px;
   }
   
   .person-name-input {
       width: 40px;
   }
}

/*────────────────────────────────────────────────
 24. Print Styles
────────────────────────────────────────────────*/
@media print {
   body {
       background: white;
       padding: 0;
   }
   
   .main-layout {
       display: block;
   }
   
   .app-header,
   .sidebar,
   .sidebar-overlay,
   .nav-tabs,
   .settings-section,
   .save-section,
   .theme-toggle-container {
       display: none !important;
   }
   
   #saved-list-section {
       display: none !important;
   }
   
   .card {
       background: white;
       box-shadow: none;
       border: 1px solid var(--g300);
       page-break-inside: avoid;
   }
   
   .layout-container {
       display: block;
   }
}
/*────────────────────────────────────────────────
  3. Layout System - 개선된 반응형 레이아웃
────────────────────────────────────────────────*/
.main-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-bottom: 1px solid var(--g200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: min(100%, 2400px); /* 최대폭 제한 완화 */
    margin: 0 auto;
    padding: 0 var(--sp6);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-content {
    flex: 1;
    max-width: min(100%, 2000px); /* 기본 최대폭 증가 */
    margin: 0 auto;
    padding: var(--sp6);
    width: 100%;
    transition: max-width 0.3s ease, padding 0.3s ease; /* 부드러운 전환 */
}

/*────────────────────────────────────────────────
  4. Sidebar - 수정된 동작
────────────────────────────────────────────────*/
.sidebar {
    position: fixed;
    top: 0;
    right: -var(--sidebar-width);
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-left: 1px solid var(--g200);
    transition: right .3s cubic-bezier(0.4, 0, 0.2, 1); /* 더 부드러운 애니메이션 */
    z-index: 1000;
    overflow-y: auto;
    box-shadow: none;
}

.sidebar.open {
    left: 0;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15); /* 열릴 때만 그림자 */
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all .3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    pointer-events: none; /* 기본적으로 클릭 비활성화 */
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto; /* 활성화될 때만 클릭 가능 */
}

/*────────────────────────────────────────────────
  23. 개선된 반응형 디자인
────────────────────────────────────────────────*/

/* 4K 모니터 (2560px 이상) */
@media (min-width: 2560px) {
    .main-content {
        max-width: min(95%, 2400px);
        padding: var(--sp8);
    }
    
    .header-content {
        max-width: min(95%, 2400px);
        padding: 0 var(--sp8);
    }
}

/* QHD+ 모니터 (1920px ~ 2559px) */
@media (min-width: 1920px) and (max-width: 2559px) {
    .main-content {
        max-width: min(95%, 2000px);
        padding: var(--sp6);
    }
    
    .header-content {
        max-width: min(95%, 2000px);
    }
}

/* FHD 모니터 (1440px ~ 1919px) */
@media (min-width: 1440px) and (max-width: 1919px) {
    .main-content {
        max-width: min(95%, 1600px);
    }
}

/* 일반 데스크톱 (1200px ~ 1439px) */
@media (min-width: 1200px) and (max-width: 1439px) {
    .main-content {
        max-width: min(95%, 1400px);
    }
    
    .layout-container {
        grid-template-columns: 1fr;
        gap: var(--sp6);
    }
}

/* 태블릿 (768px ~ 1199px) */
@media (min-width: 768px) and (max-width: 1199px) {
    .header-content {
        padding: 0 var(--sp4);
    }
    
    .main-content {
        padding: var(--sp4);
        max-width: 95%;
    }
    
    .layout-container {
        grid-template-columns: 1fr;
        gap: var(--sp5);
    }
}

/* 모바일 (767px 이하) */
@media (max-width: 767px) {
    .app-header {
        height: 60px;
    }
    
    .header-content {
        padding: 0 var(--sp3);
    }
    
    .main-content {
        padding: var(--sp3);
        max-width: 100%;
    }
    
    .layout-container {
        grid-template-columns: 1fr;
        gap: var(--sp4);
    }
    
    .sidebar {
        width: min(280px, 85vw); /* 모바일에서 화면 크기에 맞게 조정 */
        right: calc(-1 * min(280px, 85vw));
    }
    
    /* 사이드바 버튼 크기 조정 */
    .sidebar-toggle span {
        width: 18px;
        height: 2px;
    }
}

/* 초소형 모바일 (480px 이하) */
@media (max-width: 480px) {
    .main-content {
        padding: var(--sp2);
    }
    
    .sidebar {
        width: min(260px, 90vw);
        right: calc(-1 * min(260px, 90vw));
    }
}

/* 가로 스크롤 방지 */
@media (max-width: 768px) {
    .table-scroll {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch; /* iOS 부드러운 스크롤 */
    }
    
    .settlement-table,
    .additional-table,
    .adjustment-table,
    .result-table {
        min-width: 600px; /* 최소 너비 보장 */
    }
}
/*────────────────────────────────────────────────
  4. Sidebar - 완전히 수정된 동작
────────────────────────────────────────────────*/
.sidebar {
    position: fixed;
    top: 0;
    right: -100%; /* -var(--sidebar-width) 대신 -100% 사용 */
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur));
    border-left: 1px solid var(--g200);
    transition: right .3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow-y: auto;
    box-shadow: none;
    transform: translateX(100%); /* 추가 안전장치 */
}

.sidebar.open {
    left: 0;
    transform: translateX(0); /* 추가 안전장치 */
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all .3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    pointer-events: none;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
/* 모바일에서 사이드바 수정 */
@media (max-width: 767px) {
    .sidebar {
        width: min(320px, 85vw);
        right: -100%; /* 확실한 숨김 */
        transform: translateX(100%);
    }
    
    .sidebar.open {
        left: 0;
        transform: translateX(0);
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: min(280px, 90vw);
        right: -100%;
        transform: translateX(100%);
    }
}
/*────────────────────────────────────────────────
  3. Layout System - 개선된 스크롤 지원
────────────────────────────────────────────────*/

/* 2-Column Layout for FHD - 스크롤 개선 */
.layout-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp8);
    margin-top: var(--sp6);
    overflow-x: auto;
    overflow-y: visible;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch; /* iOS 부드러운 스크롤 */
    scrollbar-width: thin;
    scrollbar-color: var(--g300) var(--g100);
}

/* 스크롤바 스타일링 (웹킷 브라우저) */
.layout-container::-webkit-scrollbar {
    height: 8px;
}

.layout-container::-webkit-scrollbar-track {
    background: var(--g100);
    border-radius: 4px;
}

.layout-container::-webkit-scrollbar-thumb {
    background: var(--g300);
    border-radius: 4px;
    transition: background 0.3s;
}

.layout-container::-webkit-scrollbar-thumb:hover {
    background: var(--g500);
}

.layout-left,
.layout-right {
    display: flex;
    flex-direction: column;
    gap: var(--sp6);
    min-width: 600px; /* 최소 너비 보장 */
    flex-shrink: 0; /* 축소 방지 */
}

/* 스크롤 힌트 표시 */
.layout-container::after {
    content: '';
    position: sticky;
    right: 0;
    top: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(to left, rgba(255,255,255,0.8), transparent);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.layout-container.has-scroll::after {
    opacity: 1;
}

/*────────────────────────────────────────────────
 12. 개선된 테이블 스크롤
────────────────────────────────────────────────*/
.table-scroll {
    overflow-x: auto;
    overflow-y: visible;
    max-height: 500px;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--g300) var(--g100);
    position: relative;
}

/* 테이블 스크롤바 스타일링 */
.table-scroll::-webkit-scrollbar {
    height: 6px;
    width: 6px;
}

.table-scroll::-webkit-scrollbar-track {
    background: var(--g100);
    border-radius: 3px;
}

.table-scroll::-webkit-scrollbar-thumb {
    background: var(--g300);
    border-radius: 3px;
}

.table-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--g500);
}

/* 테이블 최소 너비 보장 */
.settlement-table,
.additional-table,
.adjustment-table,
.result-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--g50);
    min-width: max(600px, calc(200px * var(--person-count, 3))); /* 동적 최소 너비 */
}

/* 스크롤 힌트 (테이블용) */
.table-scroll::after {
    content: '← 스크롤 →';
    position: sticky;
    right: 10px;
    top: 10px;
    background: var(--brand);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 20;
}

.table-scroll.show-scroll-hint::after {
    opacity: 0.8;
}

/*────────────────────────────────────────────────
 23. 개선된 반응형 디자인 - 스크롤 우선
────────────────────────────────────────────────*/

/* 태블릿 (768px ~ 1199px) - 가로 스크롤 허용 */
@media (min-width: 768px) and (max-width: 1199px) {
    .layout-container {
        grid-template-columns: minmax(600px, 800px) minmax(600px, 800px);
        gap: var(--sp6);
        padding-right: var(--sp4); /* 스크롤 여유 공간 */
    }
    
    .layout-left,
    .layout-right {
        min-width: 600px;
    }
}

/* 모바일 (767px 이하) - 세로 배치로 전환 */
@media (max-width: 767px) {
    .layout-container {
        display: flex;
        flex-direction: column;
        gap: var(--sp4);
        overflow-x: visible;
        overflow-y: visible;
    }
    
    .layout-left,
    .layout-right {
        min-width: unset;
        width: 100%;
    }
    
    /* 모바일에서 테이블 스크롤 강화 */
    .table-scroll {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x proximity;
    }
    
    .settlement-table,
    .additional-table,
    .adjustment-table,
    .result-table {
        min-width: 600px; /* 모바일 최소 너비 */
    }
    
    /* 모바일 스크롤 힌트 항상 표시 */
    .table-scroll::after {
        opacity: 0.6;
        font-size: 8px;
        padding: 2px 6px;
    }
}

/* 초소형 모바일 (480px 이하) */
@media (max-width: 480px) {
    .settlement-table,
    .additional-table,
    .adjustment-table,
    .result-table {
        min-width: 500px; /* 더 작은 최소 너비 */
    }
    
    .layout-left,
    .layout-right {
        gap: var(--sp3);
    }
}

/* 스크롤 가능 영역 강조 */
.scrollable-hint {
    position: relative;
}

.scrollable-hint::before {
    content: '👆 스크롤 가능';
    position: absolute;
    top: -25px;
    right: 10px;
    background: var(--accent);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    opacity: 0;
    animation: fadeInOut 3s ease-in-out;
    pointer-events: none;
    z-index: 30;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0; }
    50% { opacity: 0.8; }
}
/* 제목 입력 컨테이너 스타일 */
.title-input-container {
    position: relative;
    display: inline-block;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

/* 기존 title-input 스타일 수정 */
.title-input {
    width: 100%;
    max-width: 600px;
    padding: var(--sp4) var(--sp6);
    padding-right: 70px; /* 더 큰 아이콘을 위한 공간 확보 */
    font-size: var(--fs-h3);
    font-weight: 600;
    text-align: center;
    background: var(--g50);
    border: 2px solid var(--g200);
    border-radius: var(--radius-card);
    color: var(--g900);
    transition: border-color .3s, box-shadow .3s;
    outline: none;
    margin: 0 auto;
    display: block;
}

.title-input:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 향상된 정보 아이콘 스타일 */
.enhanced-info-icon {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-hov) 100%);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    transition: all .4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
    box-shadow: 
        0 4px 20px rgba(99, 102, 241, 0.4),
        0 2px 8px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.enhanced-info-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.enhanced-info-icon:hover::before {
    transform: translateX(100%);
}

.enhanced-info-icon:hover {
    background: linear-gradient(135deg, var(--brand-hov) 0%, var(--brand) 100%);
    transform: translateY(-50%) scale(1.1) rotate(5deg);
    box-shadow: 
        0 8px 32px rgba(99, 102, 241, 0.6),
        0 4px 16px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.enhanced-info-icon:active {
    transform: translateY(-50%) scale(0.95) rotate(-2deg);
    box-shadow: 
        0 2px 12px rgba(99, 102, 241, 0.8),
        inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 아이콘 텍스트 스타일 */
.icon-text {
    position: relative;
    z-index: 2;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    transition: all .3s ease;
}

.enhanced-info-icon:hover .icon-text {
    transform: scale(1.1);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* 글로우 효과 */
.icon-glow {
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-hov) 100%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity .4s ease;
    z-index: -1;
    filter: blur(4px);
}

.enhanced-info-icon:hover .icon-glow {
    opacity: 0.7;
    animation: pulse-glow 2s infinite alternate;
}

/* 펄스 글로우 애니메이션 */
@keyframes pulse-glow {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    100% {
        transform: scale(1.1);
        opacity: 0.9;
    }
}

/* 주의를 끄는 바운스 애니메이션 (페이지 로드 시) */
.enhanced-info-icon.bounce-attention {
    animation: bounce-attention 3s ease-in-out 2s;
}

@keyframes bounce-attention {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(-50%) scale(1);
    }
    10% {
        transform: translateY(-50%) scale(1.1) rotate(5deg);
    }
    30% {
        transform: translateY(-50%) scale(1.05) rotate(-2deg);
    }
    60% {
        transform: translateY(-50%) scale(1.02) rotate(1deg);
    }
}

/* 포커스 상태 (접근성) */
.enhanced-info-icon:focus {
    outline: 3px solid var(--brand-light);
    outline-offset: 3px;
    box-shadow: 
        0 8px 32px rgba(99, 102, 241, 0.6),
        0 0 0 3px var(--brand-light);
}

/* 사이드바 열린 상태 표시 */
.enhanced-info-icon.sidebar-open {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hov) 100%);
    transform: translateY(-50%) scale(1.05);
    box-shadow: 
        0 6px 24px rgba(181, 140, 255, 0.5),
        0 2px 8px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* 다크 테마 지원 */
[data-theme="dark"] .enhanced-info-icon {
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-hov) 100%);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 4px 20px rgba(99, 102, 241, 0.3),
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .enhanced-info-icon:hover {
    box-shadow: 
        0 8px 32px rgba(99, 102, 241, 0.5),
        0 4px 16px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .title-input {
        font-size: var(--fs-h4);
        padding-right: 60px;
    }
    
    .enhanced-info-icon {
        width: 42px;
        height: 42px;
        font-size: 20px;
        right: 6px;
    }
}

@media (max-width: 480px) {
    .title-input {
        padding: var(--sp3) var(--sp4);
        padding-right: 55px;
    }
    
    .enhanced-info-icon {
        width: 38px;
        height: 38px;
        font-size: 18px;
        right: 5px;
    }
}

/* 추가 시각적 효과: 리플 효과 */
.enhanced-info-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.enhanced-info-icon:active::after {
    width: 60px;
    height: 60px;
}

/* 툴팁 스타일 개선 */
.enhanced-info-icon[title]:hover::before {
    content: attr(title);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--g900);
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    animation: tooltip-appear 0.3s ease;
}

.enhanced-info-icon[title]:hover::after {
    content: '';
    position: absolute;
    bottom: 110%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--g900);
    z-index: 1000;
}

@keyframes tooltip-appear {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}
/* 이 페이지 및 소스는 3EA Networks에 저작권이 귀속됩니다.
무단 사용시에 저작권법 및 부정경쟁방지법에 의거하여 법적 처벌 및 손해 배상 책임을 질 수 있습니다.

This page and its source are copyrighted by 3EA Networks. Unauthorized use may result in legal punishment and damages under the Copyright Act and the Unfair Competition Prevention Act. */