@charset "utf-8";

/* ============ CSS Variables (Light/Dark) ============ */

:root {
    --bg: #ffffff;
    --bg-secondary: #f7f7f7;
    --text: #333333;
    --text-muted: #555555;
    --border: #ccc;
    --accent: #ec9718;
    --accent-bg: #f6b40c;
    --input-bg: #fef4f4;
    --input-readonly-bg: #f9f9f9;
    --hover-bg: #eee;
    --shadow: rgba(0, 0, 0, 0.1);
    --toast-bg: rgb(222, 220, 224);
    --header-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg: #1a1a2e;
    --bg-secondary: #16213e;
    --text: #e0e0e0;
    --text-muted: #aaaaaa;
    --border: #444;
    --accent: #f0a830;
    --accent-bg: #d4960a;
    --input-bg: #2a2a3e;
    --input-readonly-bg: #222238;
    --hover-bg: #2e2e48;
    --shadow: rgba(0, 0, 0, 0.3);
    --toast-bg: #2e2e48;
    --header-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* ============ Base ============ */

* {
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background-color: var(--bg);
    color: var(--text);
    transition: background-color 0.3s, color 0.3s;
}

a {
    color: var(--text);
    text-decoration: none;
}

/* ============ Header ============ */

header {
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    height: 64px;
    width: 100%;
    background-color: var(--bg-secondary);
    box-shadow: var(--header-shadow);
    z-index: 1000;
    padding: 0 16px;
    transition: background-color 0.3s;
}

#title {
    font-size: 28px;
    white-space: nowrap;
    flex-shrink: 0;
}

#title a {
    color: var(--text);
}

#nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex: 1;
    margin-left: 24px;
}

#nav ul {
    display: flex;
    gap: 24px;
    list-style: none;
}

#nav a {
    font-size: 14px;
    padding: 4px 0;
    transition: border-bottom 0.2s, font-size 0.2s;
}

#nav a:hover {
    border-bottom: 3px solid var(--accent);
}

#url_copy {
    margin-left: 12px;
    padding: 6px 12px;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: 5px;
    background-color: var(--bg);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    width: auto;
}

#url_copy:hover {
    background-color: var(--hover-bg);
}

#dark_toggle {
    margin-left: 8px;
    padding: 6px 10px;
    font-size: 18px;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: var(--bg);
    cursor: pointer;
    flex-shrink: 0;
    width: auto;
    line-height: 1;
}

/* Hamburger - hidden on desktop */
#hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
    width: auto;
}

#hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text);
    transition: transform 0.3s, opacity 0.3s;
}

#hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

#hamburger.open span:nth-child(2) {
    opacity: 0;
}

#hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============ Body / Main Content ============ */

#button_group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 84px;
    padding: 0 5%;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-muted);
    background-color: var(--bg);
    font-size: 15px;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s;
    width: auto;
}

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

.btn-help {
    color: #000;
    background-color: var(--accent-bg);
    border-color: var(--accent-bg);
}

.btn-help:hover {
    background-color: var(--accent);
}

#file_select {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-muted);
    background-color: var(--bg);
    font-size: 15px;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s;
}

#file_select:hover {
    background-color: var(--hover-bg);
}

/* Total display */
.sum_all {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 12px 5%;
}

.sum_all h1 {
    font-size: 28px;
    color: var(--text-muted);
    white-space: nowrap;
}

.sum_all input {
    width: 160px;
    padding: 4px 8px;
    font-size: 28px;
    color: var(--text-muted);
    text-align: center;
    border: none;
    border-bottom: 2px solid var(--accent);
    background: transparent;
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    padding: 0 5%;
    -webkit-overflow-scrolling: touch;
}

#tbl {
    table-layout: fixed;
    width: 100%;
    min-width: 700px;
    border-collapse: collapse;
    margin-top: 12px;
}

#tbl th {
    text-align: center;
    padding: 10px 6px;
    background-color: var(--bg-secondary);
    color: var(--text);
    font-size: 13px;
    border: 1px solid var(--border);
    transition: background-color 0.3s;
}

#tbl td {
    border: 1px solid var(--border);
    padding: 0;
    vertical-align: middle;
}

#tbl input {
    width: 100%;
    padding: 8px 4px;
    border: none;
    border-radius: 0;
    background-color: transparent;
    color: var(--text);
    font-size: 14px;
    height: 40px;
    text-align: center;
}

#tbl td:nth-child(2) input {
    text-align: left;
}

#tbl input:focus {
    background-color: var(--hover-bg);
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

#tbl input[readonly] {
    background-color: var(--input-readonly-bg);
    color: var(--text-muted);
}

.cell-editable input {
    background-color: var(--input-bg) !important;
}

.dragging {
    background-color: var(--hover-bg);
    opacity: 0.8;
}

/* Row delete button */
.row-del-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 40px;
    border: none;
    background: transparent;
    color: #cc4444;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.row-del-btn:hover {
    background-color: rgba(204, 68, 68, 0.1);
}

/* ============ WBS ============ */

.wbs-cell {
    text-align: center;
    vertical-align: middle;
    font-size: 13px;
    font-weight: bold;
    color: var(--text-muted);
    padding: 4px;
    white-space: nowrap;
}

.wbs-number {
    vertical-align: middle;
}

.wbs-toggle {
    cursor: pointer;
    display: inline-block;
    margin-right: 4px;
    font-size: 10px;
    vertical-align: middle;
    color: var(--accent);
    user-select: none;
    transition: transform 0.2s;
}

.wbs-toggle:hover {
    color: var(--text);
}

.parent-row {
    background-color: var(--bg-secondary);
    font-weight: bold;
}

.parent-row input {
    font-weight: bold;
}

.parent-row input[readonly] {
    background-color: var(--bg-secondary) !important;
}

.btn-parent {
    color: var(--text);
    border-color: var(--accent);
    background-color: var(--bg);
}

.btn-parent:hover {
    background-color: var(--accent);
    color: #fff;
}

#indent_hint {
    padding: 4px 5%;
    font-size: 12px;
    color: var(--text-muted);
}

/* Spacer */
.page-spacer {
    height: 120px;
}

/* ============ Update list ============ */

.update-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.update-list li {
    position: relative;
    padding: 8px 0 8px 20px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.update-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 16px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent);
}

.update-list li:last-child {
    border-bottom: none;
}

/* ============ Changelog page ============ */

.changelog-main {
    max-width: 720px;
}

.changelog-header {
    margin-bottom: 40px;
}

.changelog-header h1 {
    font-size: 32px;
    font-weight: bold;
    color: var(--text);
    margin-bottom: 4px;
}

.changelog-subtitle {
    font-size: 14px;
    color: var(--text-muted);
}

.changelog-timeline {
    position: relative;
}

.changelog-entry {
    display: flex;
    gap: 24px;
    position: relative;
}

.changelog-entry-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 20px;
    padding-top: 6px;
}

.changelog-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border);
    border: 2px solid var(--bg);
    box-shadow: 0 0 0 2px var(--border);
    flex-shrink: 0;
    z-index: 1;
}

.changelog-dot.latest {
    background-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

.changelog-line {
    width: 2px;
    flex: 1;
    background-color: var(--border);
    margin-top: 4px;
}

.changelog-entry-content {
    flex: 1;
    padding-bottom: 36px;
}

.changelog-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.changelog-version {
    font-size: 20px;
    font-weight: bold;
    color: var(--text);
}

.changelog-date {
    font-size: 13px;
    color: var(--text-muted);
    background-color: var(--bg-secondary);
    padding: 2px 10px;
    border-radius: 12px;
}

.changelog-category {
    margin-bottom: 8px;
    margin-top: 12px;
}

.changelog-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: bold;
    padding: 2px 10px;
    border-radius: 4px;
    letter-spacing: 0.02em;
}

.badge-feature {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-improve {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-fix {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-other {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
}

[data-theme="dark"] .badge-feature {
    background-color: #064e3b;
    color: #6ee7b7;
}

[data-theme="dark"] .badge-improve {
    background-color: #1e3a5f;
    color: #93c5fd;
}

[data-theme="dark"] .badge-fix {
    background-color: #78350f;
    color: #fcd34d;
}

.changelog-items {
    list-style: none;
    margin: 0;
    padding: 0;
}

.changelog-items li {
    position: relative;
    padding: 4px 0 4px 18px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
}

.changelog-items li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--text-muted);
}

/* ============ Document page ============ */

.doc-page {
    padding-top: 64px;
}

.doc-layout {
    display: flex;
    min-height: calc(100vh - 64px);
}

/* Sidebar */
.doc-sidebar {
    position: sticky;
    top: 64px;
    width: 240px;
    height: calc(100vh - 64px);
    overflow-y: auto;
    flex-shrink: 0;
    border-right: 1px solid var(--border);
    background-color: var(--bg-secondary);
    padding: 24px 0;
}

.doc-sidebar-header {
    padding: 0 20px 16px;
    font-size: 14px;
    font-weight: bold;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.doc-nav {
    display: flex;
    flex-direction: column;
}

.doc-nav-link {
    display: block;
    padding: 8px 20px;
    font-size: 14px;
    color: var(--text-muted);
    border-left: 3px solid transparent;
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.doc-nav-link:hover {
    color: var(--text);
    background-color: var(--hover-bg);
}

.doc-nav-link.active {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: bold;
}

/* Main content */
.doc-main {
    flex: 1;
    max-width: 800px;
    padding: 40px 48px 80px;
}

.doc-section {
    margin-bottom: 48px;
    scroll-margin-top: 80px;
}

.doc-section h1 {
    font-size: 26px;
    font-weight: bold;
    color: var(--text);
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
    margin-bottom: 20px;
}

.doc-section h2 {
    font-size: 18px;
    font-weight: bold;
    color: var(--text);
    margin-top: 28px;
    margin-bottom: 10px;
    padding-left: 10px;
    border-left: 3px solid var(--accent);
}

.doc-section p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
    margin-bottom: 12px;
}

/* Callout */
.doc-callout {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--accent);
    padding: 12px 16px;
    border-radius: 0 6px 6px 0;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
    margin: 16px 0;
}

/* Table */
.doc-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
}

.doc-table th {
    text-align: left;
    padding: 10px 14px;
    background-color: var(--bg-secondary);
    color: var(--text);
    font-weight: bold;
    border-bottom: 2px solid var(--border);
}

.doc-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.doc-table tbody tr:hover {
    background-color: var(--hover-bg);
}

/* Code */
.doc-section code {
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 13px;
    color: var(--accent);
}

.doc-code {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px 18px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text);
    margin: 16px 0;
}

/* kbd */
.doc-section kbd {
    display: inline-block;
    padding: 2px 7px;
    font-size: 12px;
    font-family: 'Courier New', Courier, monospace;
    color: var(--text);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 1px 1px var(--shadow);
    vertical-align: middle;
}

/* Steps */
.doc-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 20px 0;
}

.doc-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
}

.doc-step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--accent);
    color: #fff;
    font-weight: bold;
    font-size: 15px;
    flex-shrink: 0;
}

.doc-step strong {
    font-size: 15px;
    display: block;
    margin-bottom: 4px;
}

.doc-step p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* ============ Contact ============ */

.contact-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    margin-top: 80px;
    padding: 40px 20px;
    background-color: var(--bg);
}

#profile {
    background-color: var(--bg-secondary);
    width: 350px;
    height: 350px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#profile img {
    width: 220px;
    height: 220px;
    border-radius: 30%;
    border: solid 4px var(--border);
}

#contact {
    margin-top: 32px;
    color: #f9f8f8;
    font-size: 24px;
    background-color: #3d4549;
    width: 350px;
    padding: 16px;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

#contact:hover {
    background-color: #4d5559;
}

/* ============ Footer ============ */

footer {
    background-color: var(--bg-secondary);
    padding: 48px 5% 0;
    transition: background-color 0.3s;
    border-top: 1px solid var(--border);
}

#footer {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}

.footer-section {
    flex: 1;
}

.footer-brand {
    font-size: 18px;
    font-weight: bold;
    color: var(--text);
    margin-bottom: 8px;
}

.footer-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-heading {
    font-size: 14px;
    font-weight: bold;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-muted);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-terms {
    list-style: none;
}

.footer-terms li {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 4px;
    padding-left: 12px;
    position: relative;
}

.footer-terms li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.footer-bottom {
    max-width: 1000px;
    margin: 32px auto 0;
    padding: 16px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
}

/* ============ Gantt Chart ============ */

.btn-gantt {
    color: #fff;
    background-color: #4a90d9;
    border-color: #4a90d9;
}

.btn-gantt:hover {
    background-color: #3a7bc8;
}

#gantt-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg);
    z-index: 2000;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.gantt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--accent);
    flex-shrink: 0;
}

.gantt-header h2 {
    font-size: 22px;
    color: var(--text);
}

.gantt-close {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gantt-close:hover {
    background-color: var(--hover-bg);
}

.gantt-settings {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    padding: 12px 20px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.gantt-settings label {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.gantt-settings input {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    background: var(--bg);
    color: var(--text);
    width: auto;
}

.gantt-refresh {
    padding: 6px 16px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    width: auto;
}

.gantt-refresh:hover {
    opacity: 0.85;
}

.gantt-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gantt-export-btn {
    padding: 6px 16px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    width: auto;
    white-space: nowrap;
}

.gantt-export-btn:hover {
    opacity: 0.85;
}

.gantt-export-excel {
    background: #217346;
    border-color: #217346;
}

.gantt-chart {
    flex: 1;
    overflow: auto;
    padding: 12px 20px;
}

/* Date header row */
.gantt-date-row {
    display: flex;
    border-bottom: 1px solid var(--border);
    background-color: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.gantt-month-row {
    border-bottom: none;
    z-index: 11;
}

.gantt-month-row + .gantt-date-row {
    top: 28px;
    border-bottom: 2px solid var(--border);
}

.gantt-date-spacer {
    border-right: 1px solid var(--border);
    height: 28px;
}

.gantt-date-labels {
    flex: 1;
    position: relative;
    height: 28px;
    min-width: 400px;
}

.gantt-month-label {
    font-size: 12px;
    color: var(--accent);
    font-weight: bold;
    transform: translate(0, -50%);
    padding-left: 4px;
}

.gantt-date-label {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 10px;
    color: var(--text-muted);
    font-weight: bold;
    white-space: nowrap;
}

/* Chart area */
.gantt-chart-area {
    display: flex;
}

.gantt-task-list {
    flex-shrink: 0;
    width: 240px;
    border-right: 1px solid var(--border);
}

.gantt-task-label {
    height: 32px;
    display: flex;
    align-items: center;
    font-size: 12px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.gantt-parent-label {
    font-weight: bold;
    background-color: var(--bg-secondary);
}

.gantt-wbs {
    color: var(--accent);
    font-weight: bold;
    margin-right: 4px;
    font-size: 11px;
}

.gantt-bar-area {
    flex: 1;
    position: relative;
    min-width: 400px;
}

.gantt-grid-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--border);
    opacity: 0.4;
    z-index: 1;
}

.gantt-day-band {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 0;
    pointer-events: none;
}

.gantt-day-band-saturday {
    background-color: rgba(68, 136, 204, 0.10);
}

.gantt-day-band-holiday {
    background-color: rgba(204, 68, 68, 0.10);
}

.gantt-bar-row {
    height: 32px;
    position: relative;
    border-bottom: 1px solid var(--border);
}

.gantt-bar {
    position: absolute;
    top: 6px;
    height: 20px;
    background-color: var(--accent);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2px;
    transition: opacity 0.2s;
}

.gantt-bar:hover {
    opacity: 0.8;
}

.gantt-bar-parent {
    background-color: var(--text-muted);
    height: 10px;
    top: 11px;
    border-radius: 2px;
}

.gantt-bar-conf {
    background-color: var(--accent);
    opacity: 0.2;
    height: 20px;
    top: 6px;
    border-radius: 3px;
}

.gantt-bar-label {
    font-size: 10px;
    color: #fff;
    font-weight: bold;
    padding: 0 4px;
    white-space: nowrap;
}

/* Member management */
.gantt-member-toggle {
    padding: 6px 16px;
    border: 1px solid #4a90d9;
    border-radius: 4px;
    background: #4a90d9;
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    width: auto;
    white-space: nowrap;
}

.gantt-member-toggle:hover {
    opacity: 0.85;
}

.gantt-member-toggle.active {
    background: #3a7bc8;
}

.gantt-member-panel {
    display: none;
    padding: 12px 20px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.gantt-member-panel.open {
    display: block;
}

.gantt-member-form {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.gantt-member-form label {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.gantt-member-form input {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    background: var(--bg);
    color: var(--text);
    width: auto;
}

.gantt-member-form input[type="text"] {
    width: 120px;
}

.gantt-member-form input[type="number"] {
    width: 70px;
}

.gantt-member-add {
    padding: 4px 14px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    width: auto;
}

.gantt-member-add:hover {
    opacity: 0.85;
}

.gantt-member-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gantt-member-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 12px;
    color: var(--text);
}

.gantt-member-chip button {
    background: none;
    border: none;
    color: #cc4444;
    font-size: 14px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    width: auto;
}

.gantt-member-chip button:hover {
    color: #ff0000;
}

/* Tab bar */
.gantt-tab-bar {
    display: flex;
    gap: 0;
    padding: 0 20px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.gantt-tab {
    padding: 8px 20px;
    font-size: 13px;
    color: var(--text-muted);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    width: auto;
    transition: color 0.2s, border-color 0.2s;
}

.gantt-tab:hover {
    color: var(--text);
}

.gantt-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: bold;
}

/* Assignee column */
.gantt-assignee-col {
    flex-shrink: 0;
    width: 100px;
    border-right: 1px solid var(--border);
}

.gantt-assignee-cell {
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
    padding: 0 4px;
}

.gantt-assignee-cell select {
    width: 100%;
    padding: 2px 4px;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 11px;
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
}

.gantt-assignee-spacer {
    flex-shrink: 0;
    width: 100px;
    border-right: 1px solid var(--border);
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: bold;
    color: var(--text-muted);
}

/* Overload indicators */
.gantt-bar-overload {
    background-color: #e74c3c !important;
}

.gantt-assignee-overload select {
    background-color: #fde8e8 !important;
    border-color: #e74c3c !important;
    color: #e74c3c !important;
}

[data-theme="dark"] .gantt-assignee-overload select {
    background-color: #4a1a1a !important;
    border-color: #e74c3c !important;
    color: #ff6b6b !important;
}

/* Workload matrix */
.gantt-workload {
    flex: 1;
    overflow: auto;
    padding: 12px 20px;
    display: none;
}

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

.gantt-workload-table th {
    text-align: center;
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    color: var(--text);
    font-weight: bold;
    border: 1px solid var(--border);
}

.gantt-workload-table td {
    text-align: center;
    padding: 8px 12px;
    border: 1px solid var(--border);
    color: var(--text);
}

.gantt-workload-cell-ok {
    background-color: var(--bg);
}

.gantt-workload-cell-over {
    background-color: #fde8e8;
    color: #e74c3c;
    font-weight: bold;
}

[data-theme="dark"] .gantt-workload-cell-over {
    background-color: #4a1a1a;
    color: #ff6b6b;
}

/* Gantt responsive */
@media screen and (max-width: 768px) {
    .gantt-task-list {
        width: 160px;
    }

    .gantt-task-label {
        font-size: 11px;
    }

    .gantt-settings {
        gap: 8px;
        padding: 8px 12px;
    }

    .gantt-chart {
        padding: 8px;
    }

    .gantt-bar-area {
        min-width: 300px;
    }

    .gantt-assignee-col,
    .gantt-assignee-spacer {
        width: 80px;
    }

    .gantt-member-form input[type="text"] {
        width: 100px;
    }

    .gantt-tab {
        padding: 8px 14px;
        font-size: 12px;
    }
}

@media screen and (max-width: 480px) {
    .gantt-task-list {
        width: 120px;
    }

    .gantt-task-label {
        font-size: 10px;
        height: 28px;
    }

    .gantt-bar-row {
        height: 28px;
    }

    .gantt-assignee-cell {
        height: 28px;
    }

    .gantt-assignee-col,
    .gantt-assignee-spacer {
        width: 70px;
    }

    .gantt-assignee-cell select {
        font-size: 10px;
    }

    .gantt-tab {
        padding: 6px 10px;
        font-size: 11px;
    }

    .gantt-member-form {
        gap: 4px;
    }
}

/* ============ Toast / Notification ============ */

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

#pop {
    display: flex;
    justify-content: flex-end;
    animation: slideInRight 0.5s ease-out;
    position: fixed;
    top: 80px;
    right: 16px;
    padding: 10px;
    z-index: 9999;
}

#pop h5 {
    width: 280px;
    padding: 12px;
    border-radius: 10px;
    background-color: var(--toast-bg);
    color: var(--text);
    box-shadow: 4px 4px 10px var(--shadow);
    font-size: 14px;
    line-height: 1.5;
}

#close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    background-color: transparent;
    border: none;
    text-align: center;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 14px;
}

#close:hover {
    background-color: var(--hover-bg);
}

/* ============ Responsive: Tablet (<=1024px) ============ */

@media screen and (max-width: 1024px) {

    #title {
        font-size: 22px;
    }

    #nav a {
        font-size: 13px;
    }

    #nav ul {
        gap: 16px;
    }

    .sum_all h1, .sum_all input {
        font-size: 24px;
    }
}

/* ============ Responsive: Mobile (<=768px) ============ */

@media screen and (max-width: 768px) {

    header {
        flex-wrap: wrap;
        height: auto;
        min-height: 56px;
        padding: 8px 12px;
    }

    #title {
        font-size: 20px;
    }

    #hamburger {
        display: flex;
        order: 2;
    }

    #dark_toggle {
        order: 3;
        margin-left: 8px;
        font-size: 16px;
        padding: 4px 8px;
    }

    #url_copy {
        display: none;
    }

    #nav {
        display: none;
        flex-basis: 100%;
        order: 4;
        margin-left: 0;
        margin-top: 8px;
    }

    #nav.open {
        display: flex;
    }

    #nav ul {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    #nav ul li {
        border-top: 1px solid var(--border);
    }

    #nav a {
        display: block;
        padding: 12px 8px;
        font-size: 15px;
    }

    #nav a:hover {
        border-bottom: none;
        background-color: var(--hover-bg);
    }

    /* Buttons */
    #button_group {
        margin-top: 72px;
        padding: 0 12px;
        gap: 6px;
    }

    .btn, #file_select {
        font-size: 13px;
        padding: 6px 10px;
    }

    /* Total */
    .sum_all {
        padding: 8px 12px;
    }

    .sum_all h1 {
        font-size: 22px;
    }

    .sum_all input {
        width: 120px;
        font-size: 22px;
    }

    /* Table */
    .table-wrapper {
        padding: 0 8px;
    }

    #tbl {
        min-width: 600px;
    }

    #tbl th:nth-child(2),
    #tbl td:nth-child(2) {
        display: none;
    }

    #tbl th {
        font-size: 11px;
        padding: 6px 2px;
    }

    #tbl input {
        font-size: 13px;
        padding: 6px 2px;
    }

    /* Footer */
    #footer {
        flex-direction: column;
        gap: 32px;
    }

    /* Document page */
    .doc-sidebar {
        display: none;
    }

    .doc-main {
        padding: 24px 16px 60px;
    }

    .doc-section h1 {
        font-size: 22px;
    }

    .doc-section h2 {
        font-size: 16px;
    }

    /* Changelog */
    .changelog-header h1 {
        font-size: 24px;
    }

    .changelog-entry {
        gap: 16px;
    }

    .changelog-entry-content {
        padding-bottom: 28px;
    }

    .changelog-version {
        font-size: 17px;
    }

    /* Contact */
    .contact-page {
        margin-top: 64px;
        padding: 24px 12px;
        min-height: 60vh;
    }

    #profile {
        width: 280px;
        height: 280px;
    }

    #profile img {
        width: 180px;
        height: 180px;
    }

    #contact {
        font-size: 18px;
        width: 280px;
    }

    /* WBS */
    .wbs-cell {
        font-size: 11px;
    }

    #indent_hint {
        padding: 4px 12px;
        font-size: 11px;
    }

    /* Spacer */
    .page-spacer {
        height: 80px;
    }
}

/* ============ Responsive: Small phone (<=480px) ============ */

@media screen and (max-width: 480px) {

    #title {
        font-size: 17px;
    }

    #button_group {
        margin-top: 68px;
    }

    .btn, #file_select {
        font-size: 12px;
        padding: 6px 8px;
    }

    .sum_all h1 {
        font-size: 18px;
    }

    .sum_all input {
        width: 100px;
        font-size: 18px;
    }

    #tbl {
        min-width: 520px;
    }
}