:root {
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --accent-color: #8b5e3c;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --item-bg-color: #f1f3f5;
    --sidebar-width: 280px;
    --transition-speed: 0.2s;
}

body.light-mode {
    --bg-color: #121212;
    --surface-color: #1a1a1a;
    --accent-color: #e0ac69;
    --text-color: #e0e0e0;
    --border-color: #333;
    --item-bg-color: #222;
}


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

body {
    font-family: 'Shippori Mincho', serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    height: 100vh;
}

.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Main Sidebar */
.main-sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: margin-left var(--transition-speed);
}

.main-sidebar.hidden {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-top {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 8px;
}

.logo {
    font-size: 1.25rem;
    color: var(--accent-color);
    flex: 1;
    text-align: center;
    margin: 0;
    line-height: 1;
}

.logo small {
    font-size: 0.7rem;
    opacity: 0.8;
}

.project-info {
    margin-bottom: 16px;
}

.sidebar-input {
    width: 100%;
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    outline: none;
}

.sidebar-input.error {
    border-color: #ff4d4d;
    box-shadow: 0 0 0 2px rgba(255, 77, 77, 0.2);
}

.nav-groups {
    display: flex;
    gap: 4px;
    background: var(--item-bg-color);
    padding: 4px;
    border-radius: 8px;
}

.nav-btn {
    flex: 1;
    background: none;
    border: none;
    color: #888;
    padding: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-btn i {
    width: 18px;
    height: 18px;
}

.nav-btn span {
    font-size: 10px;
}

.nav-btn.active {
    background-color: var(--surface-color);
    color: var(--accent-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

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

.settings-section h3 {
    font-size: 0.8rem;
    color: #888;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-item {
    margin-bottom: 16px;
}

.setting-item label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-row input {
    width: 60px;
    padding: 6px;
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
}

select {
    width: 100%;
    padding: 8px;
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    outline: none;
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.action-btn {
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.action-btn i {
    width: 16px;
    height: 16px;
}

.action-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.action-btn.primary {
    background-color: var(--accent-color);
    color: var(--surface-color);
    border-color: var(--accent-color);
}

.action-btn.primary:hover {
    filter: brightness(1.1);
}

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

.add-btn {
    background: none;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 4px;
    border-radius: 4px;
    cursor: pointer;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.05);
}

.status-summary {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #888;
}

/* Sidebar Toggle Buttons */
.icon-btn {
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    padding: 4px;
}

.sidebar-show-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 101;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--accent-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hidden {
    display: none !important;
}

/* Editor Area */
.editor-area {
    flex: 1;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background-color: var(--bg-color);
}

.editor-container {
    height: 100%;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    display: flex;
    flex-direction: row-reverse;
}

.editor-scroll-wrapper {
    height: 100%;
    display: flex;
    flex-direction: row-reverse;
    padding: 10px 50vw;
    align-items: center;
    /* Keep some space at the start and end */
}

.vertical-writing {
    writing-mode: vertical-rl;
    -webkit-writing-mode: vertical-rl;
    outline: none;
    text-align: justify;
    white-space: pre-wrap;
    padding: 40px 40px;
    min-width: 1000px;
    background-color: var(--surface-color);
    box-shadow: 0 0 100px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
    position: relative;
}

/* Ruby Popup */
.ruby-popup {
    position: fixed;
    z-index: 1000;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    display: flex;
    gap: 8px;
    transform: translate(-50%, -120%);
}

.ruby-popup input {
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
    outline: none;
    width: 120px;
}

.ruby-popup button {
    background: var(--accent-color);
    border: none;
    color: var(--surface-color);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

/* Item List Styles (for Character/Plot) */
.item-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar-item {
    background: var(--item-bg-color);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid transparent;
}

.sidebar-item:focus-within {
    border-color: var(--accent-color);
}

.item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.item-title {
    background: none;
    border: none;
    color: var(--text-color);
    font-weight: bold;
    font-size: 0.9rem;
    width: 80%;
    outline: none;
}

.delete-item-btn {
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
}

.item-content {
    width: 100%;
    height: 60px;
    background: none;
    border: none;
    color: #aaa;
    font-size: 0.8rem;
    resize: none;
    outline: none;
}

/* Typography */
ruby {
    ruby-align: center;
}

rt {
    font-size: 0.6em;
    color: var(--text-color);
}

::highlight(ruby-selection) {
    background-color: rgba(139, 94, 60, 0.4);
    color: inherit;
}

/* Switch Toggle */
.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--item-bg-color);
    transition: .4s;
    border-radius: 24px;
    border: 1px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-color);
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

input:checked+.slider:before {
    transform: translateX(20px);
    background-color: var(--surface-color);
}

.required {
    color: #ff4d4d;
    margin-left: 2px;
}

/* Ruby Popup Actions */
.ruby-popup-actions {
    display: flex;
    gap: 4px;
}

.ruby-popup button.cancel-btn {
    background: var(--item-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 6000;
}

.modal-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 24px;
    cursor: pointer;
}

.modal-content h2 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    background: var(--item-bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 6px;
    outline: none;
}

.hp-field {
    display: none;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

.privacy-text {
    max-height: 400px;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.6;
}

.privacy-text h3 {
    margin: 16px 0 8px;
    font-size: 1.1rem;
}

.privacy-text ul {
    list-style: none;
    /* 標準の点を消す */
    padding-left: 1.2em;
    margin-top: 1em;
    margin-bottom: 1em;
}

.privacy-text li {
    position: relative;
}

.privacy-text li::before {
    content: "・";
    /* 中黒を使用 */
    position: absolute;
    left: -1.2em;
    color: var(--text-color);
    /* アクセントカラーを適用 */
    font-weight: bold;
}



/* Home Screen Styles */
.home-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    z-index: 5000;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    overflow-y: auto;
}

.home-container {
    width: 100%;
    max-width: 800px;
    padding: 40px;
}

.home-title {
    font-size: 3rem;
    color: var(--accent-color);
    text-align: center;
    margin-bottom: 8px;
}

.home-subtitle {
    text-align: center;
    color: #888;
    margin-bottom: 40px;
}

.home-actions {
    display: flex;
    justify-content: center;
    margin-bottom: 60px;
}

.large-btn {
    padding: 16px 32px;
    font-size: 1.2rem;
    border-radius: 8px;
}

.home-pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.home-pane-header h2 {
    font-size: 1.2rem;
    color: #888;
    margin: 0;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
}

.project-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.project-info-home h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.project-info-home p {
    font-size: 0.9rem;
    color: #888;
}

.project-card-actions {
    display: flex;
    gap: 8px;
}

.project-card-actions button {
    background: var(--item-bg-color);
    border: none;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-color);
    transition: all 0.2s;
}

.project-card-actions button:hover {
    background: #ff4d4d;
    color: #fff;
}

/* Full Screen Toast */
.fullscreen-toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 12px 24px;
    border-radius: 30px;
    z-index: 3000;
    pointer-events: none;
    font-size: 0.9rem;
    animation: fadeInOut 2.5s forwards;
}

@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translate(-50%, 20px);
    }

    10% {
        opacity: 1;
        transform: translate(-50%, 0);
    }

    80% {
        opacity: 1;
        transform: translate(-50%, 0);
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* 灯を感じる送信完了通知 */
.tomoshi-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(26, 26, 26, 0.95);
    /* 深い背景色 */
    color: #e0ac69;
    /* 暖色系のアクセントカラー */
    padding: 30px 40px;
    border-radius: 4px;
    border: 1px solid rgba(224, 172, 105, 0.3);
    box-shadow: 0 0 30px rgba(224, 172, 105, 0.15);
    /* ぼんやりとした光 */
    z-index: 9999;
    text-align: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
    backdrop-filter: blur(8px);
}

.tomoshi-toast.show {
    opacity: 1;
    transform: translate(-50%, -60%);
    /* 少し上に浮き上がる */
}

.tomoshi-toast i {
    display: block;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 8px #e0ac69);
}

.tomoshi-toast span {
    font-family: 'Shippori Mincho', serif;
    letter-spacing: 0.1em;
    font-size: 1.0rem;
}