:root {
    /* Colors - Light Mode (Default) */
    --primary-color: #107c41;
    --primary-hover: #0c5e31;
    --primary-light: #e6f7ef;

    --text-main: #1f2937;
    --text-secondary: #4b5563;
    --text-light: #9ca3af;

    --bg-body: #f9fafb;
    --bg-card: #ffffff;
    --bg-secondary: #f3f4f6;
    --border-color: #e5e7eb;

    --gradient-1: linear-gradient(135deg, #107c41 0%, #22c55e 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-focus: 0 0 0 3px rgba(16, 124, 65, 0.3);

    /* Typography */
    --font-sans: 'Inter', 'Noto Sans JP', sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
}

[data-theme="dark"] {
    --text-main: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;

    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-secondary: #334155;
    --border-color: #334155;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);

    --primary-light: rgba(16, 124, 65, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.1s ease;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

[data-theme="dark"] .category-pill:not(.active) {
    background: #334155;
    color: #94a3b8;
}

[data-theme="dark"] .tag-btn {
    background: #1e293b;
    color: #94a3b8;
}

[data-theme="dark"] .func-syntax-preview {
    background: var(--bg-secondary);
    color: #4ade80;
    /* Match modal syntax box color */
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none !important;
}

/* Background Decoration */
.bg-gradient-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 600px;
    background: radial-gradient(circle at 50% 0%, rgba(34, 197, 94, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

[data-theme="dark"] .bg-gradient-decoration {
    background: radial-gradient(circle at 50% 0%, rgba(34, 197, 94, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
}

/* Header */
.site-header {
    height: 70px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

/* Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

.menu-toggle:hover {
    color: var(--primary-color);
}

.main-nav {
    display: flex;
    gap: 2rem;
    margin-left: auto;
    margin-right: 2rem;
}


/* Mobile Header Fix - Hamburger Menu Implementation */
@media (max-width: 992px) {
    .site-header {
        height: 60px;
    }

    .site-header .container {
        padding: 0 1.25rem;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 0;
    }

    .logo {
        margin-bottom: 0;
        font-size: 1.4rem;
    }

    .header-actions {
        margin-left: auto;
    }

    .theme-toggle-btn {
        order: 1;
    }

    .menu-toggle {
        display: block;
        order: 2;
        margin-left: 0.5rem;
    }

    .main-nav {
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
        /* Hidden by default */
        z-index: 99;
    }

    .site-header.nav-open .main-nav {
        display: flex;
    }

    .nav-link {
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1rem;
        background: transparent;
        border-radius: 0;
        border-bottom: 1px solid var(--border-color-light);
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    [data-theme="dark"] .main-nav {
        background: #1e293b;
    }

    .main-nav::-webkit-scrollbar {
        display: none;
    }
}

[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.8);
}

.site-header .container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: -0.025em;
    transition: transform 0.2s ease;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--primary-color);
    filter: drop-shadow(0 2px 4px rgba(16, 124, 65, 0.2));
}

.logo span {
    background: linear-gradient(135deg, var(--text-main) 30%, #4b5563 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .logo span {
    background: linear-gradient(135deg, #f9fafb 30%, #9ca3af 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo .highlight {
    color: var(--primary-color);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
    font-style: italic;
    margin-left: -1px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}



.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* Theme Toggle */
.theme-toggle-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    margin-left: 1rem;
}

.theme-toggle-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Hero Section */
.hero-section {
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Search Bar */
.search-container {
    max-width: 600px;
    margin: 0 auto 2rem;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 1.15rem 1.5rem 1.15rem 3.5rem;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s;
    color: var(--text-main);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), var(--shadow-focus);
}

.search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 1.25rem;
}

.popular-tags {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.tag-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.tag-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

/* Categories */
.categories-section {
    padding-top: 2rem;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.category-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.category-pill {
    padding: 0.6rem 1.25rem;
    border-radius: 50px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
}

.category-pill:hover,
.category-pill.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Functions Grid */
.functions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
    gap: 1.5rem;
    padding-bottom: 4rem;
}

.function-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    /* overflow: hidden; Removed to allow badges to protrude */
    min-width: 0;
}

.function-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.func-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.func-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.func-category {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 4px;
    font-weight: 600;
    white-space: nowrap;
}

.func-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.func-syntax-preview {
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    background: var(--bg-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .func-syntax-preview {
    background: var(--bg-secondary);
    color: #4ade80;
    border-color: var(--border-color);
}

/* Footer */
.site-footer {
    margin-top: auto;
    padding: 2rem 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-card);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    position: relative;
    z-index: 1010;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    color: var(--text-main);
}

.modal:not(.hidden) .modal-content {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.2s;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-modal:hover {
    color: var(--text-main);
    background: var(--bg-secondary);
}

/* Modal Internal Styles */
.modal-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.modal-badges {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    /* Ensure badges are centered vertically */
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary-color);
}

.detail-section {
    margin-bottom: 1.5rem;
}

/* Modal Details List (LLMO Semantic) */
.func-details-list {
    margin-top: 1.5rem;
}

.detail-group {
    margin-bottom: 2rem;
}

.detail-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.detail-label::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--gradient-1);
    border-radius: 2px;
}

.detail-content {
    margin: 0;
    color: var(--text-main);
    line-height: 1.7;
}

.syntax-box {
    background: var(--bg-secondary);
    padding: 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    position: relative;
    margin-top: 0.5rem;
}

.syntax-box code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1.05rem;
    color: var(--primary-color);
    font-weight: 600;
    line-height: 1.5;
    word-break: break-all;
}

[data-theme="dark"] .syntax-box code {
    color: #4ade80;
    /* Brighter green for dark mode */
}

.example-result {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--primary-light);
    border-left: 4px solid #22c55e;
    border-radius: 0 4px 4px 0;
    font-size: 0.95rem;
    color: var(--primary-color);
}

[data-theme="dark"] .example-result {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border-left-color: #4ade80;
}

.example-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    color: var(--text-main);
}

.copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.copy-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.category-pill:hover,
.category-pill.active {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .main-nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .site-header {
        height: 60px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .functions-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        padding: 1.5rem;
    }
}

/* VERSION BADGES */
.version-list {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

.version-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    font-weight: 600;
    white-space: nowrap;
}

[data-theme="dark"] .version-badge {
    background: rgba(16, 124, 65, 0.2);
    color: #4ade80;
    border-color: #107c41;
}

/* .version-badge.v-365 removed */

.version-badge.v-new {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

/* EXCEL EXAMPLE TABLE */
.excel-table-container {
    margin-top: 1rem;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.excel-table {
    border-collapse: collapse;
    width: 100%;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    background: var(--bg-card);
}

.excel-table th,
.excel-table td {
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    text-align: left;
    min-width: 50px;
    color: var(--text-main);
}

/* Excel Header Style */
.excel-table thead th {
    background-color: #f8fafc;
    color: #64748b;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    border-bottom: 2px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Excel Row Number Column */
.excel-table tbody th {
    background-color: #f8fafc;
    color: #64748b;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    width: 40px;
    border-right: 2px solid var(--border-color);
}

.excel-table td.highlight-cell {
    background-color: rgba(249, 115, 22, 0.1);
    border: 2px solid #f97316;
}

.excel-table td.result-cell {
    background-color: rgba(34, 197, 94, 0.1);
    font-weight: bold;
    color: var(--primary-color);
}

/* Excel First Row Data Header */
.excel-table tbody tr:first-child td {
    background-color: var(--bg-secondary);
    font-weight: 700;
    color: var(--text-main);
}

[data-theme="dark"] .excel-table {
    background-color: #1e293b;
}

[data-theme="dark"] .excel-table thead th,
[data-theme="dark"] .excel-table tbody th {
    background-color: #0f172a;
    color: #94a3b8;
    border-color: #475569;
    /* Slightly lighter borders for th */
}

/* Dark mode override for the first row header */
[data-theme="dark"] .excel-table tbody tr:first-child td {
    background-color: #334155;
    /* Distinct blue-gray for the "Data Name" row */
    font-weight: 700;
    color: #f8fafc;
    border-color: #475569;
}

[data-theme="dark"] .excel-table td {
    border-color: #334155;
    /* Base border for cells */
}

[data-theme="dark"] .excel-table td.result-cell {
    background-color: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

[data-theme="dark"] .excel-table td.result-cell {
    color: #4ade80;
}

/* Split Tables Layout */
.example-split-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.table-wrapper {
    background: var(--bg-secondary);
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

[data-theme="dark"] .table-wrapper {
    background: #1e293b;
}

.table-label {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: var(--primary-light);
    border-left: 3px solid var(--primary-color);
    border-radius: 0 4px 4px 0;
}

[data-theme="dark"] .table-label {
    background: rgba(16, 124, 65, 0.15);
    color: #4ade80;
    border-left-color: #4ade80;
}

/* @media (min-width: 640px) {
    .example-split-container {
        flex-direction: row;
        gap: 1.5rem;
        align-items: flex-start;
    }

    .table-wrapper {
        flex: 1;
    }
} */

/* Modal adjustments */
.modal-header {
    padding-right: 2rem;
    /* Space for close button */
}

.views-count {
    display: inline-block;
    background: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    border: 1px solid var(--border-color);
}

/* Recipes Page Styles */
.recipe-card {
    border-left: 5px solid var(--primary-color);
}

.recipe-functions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

[data-theme="dark"] .recipe-card {
    border-left-color: #4ade80;
}

[data-theme="dark"] .recipe-card .func-category {
    background: rgba(74, 222, 128, 0.1);
    color: #4ade80;
}

[data-theme="dark"] .views-count {
    background: #1e293b;
    color: var(--text-secondary);
    border-color: #334155;
    /* font-size and weight should inherit or match base style (0.8rem / 600) */
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
}

.reset-demo-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.reset-demo-btn:hover {
    background: var(--bg-card);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.formula-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-sm);
}

.formula-icon {
    font-style: italic;
    font-weight: 700;
    color: var(--text-light);
    user-select: none;
}

.formula-display {
    flex: 1;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.spreadsheet-grid {
    display: grid;
    grid-template-columns: 40px repeat(3, 1fr);
    gap: 0;
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    user-select: none;
}

.ss-header {
    background: #f1f5f9;
    color: #64748b;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    padding: 0.5rem 0;
    border-right: 1px solid var(--border-color);
    border-bottom: 2px solid var(--border-color);
}

.ss-row-label {
    background: #f1f5f9;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    border-right: 2px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.ss-cell {
    background: var(--bg-card);
    min-height: 40px;
    display: flex;
    align-items: center;
    padding: 0 0.75rem;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    position: relative;
    color: var(--text-main);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    transition: none;
    /* Instant feedback */
}

.ss-cell.editable {
    cursor: cell;
}

.ss-cell.editable:hover {
    background: #f8fafc;
}

.ss-cell.active-val {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
    z-index: 2;
    background: var(--bg-card) !important;
}

[data-theme="dark"] .ss-cell.active-val {
    outline-color: #4ade80;
}

.ss-cell-input {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    padding: 0;
}


[data-theme="dark"] .ss-header,
[data-theme="dark"] .ss-row-label {
    background: #0f172a;
    color: #94a3b8;
    border-color: #475569 !important;
}

[data-theme="dark"] .spreadsheet-grid {
    border-color: #475569;
}

[data-theme="dark"] .ss-cell.editable:hover {
    background: #1e293b;
}

/* Interactive Demo Header Cell */
.ss-cell.header-cell {
    background-color: var(--bg-secondary) !important;
    font-weight: 700;
}

[data-theme="dark"] .ss-cell.header-cell {
    background-color: #334155 !important;
    color: #f8fafc;
    border-color: #475569;
}

[data-theme="dark"] .ss-cell {
    border-color: #334155;
    background-color: #1e293b;
}

[data-theme="dark"] .playground-section {
    border-color: #334155;
}

/* Tutorial Elements */
.tutorial-formula-box {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

[data-theme="dark"] .tutorial-formula-box {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.2);
}

.tutorial-label {
    background: #22c55e;
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.tutorial-formula-box code {
    font-family: 'Consolas', monospace;
    font-size: 1.1rem;
    color: #166534;
    font-weight: 600;
}

[data-theme="dark"] .tutorial-formula-box code {
    color: #4ade80;
}

.tutorial-formula-box.hidden {
    display: none;
}

/* Ranking Page Tabs */
.ranking-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--text-main);
    background: var(--bg-secondary);
}

.tab-btn.active {
    color: white;
    background: var(--primary-color);
}

/* Ranking Filters */
.ranking-filter-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-main);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.year-selector-wrapper {
    position: relative;
    margin-left: 0.5rem;
}

.year-select {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 2rem 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    appearance: none;
    transition: all 0.2s;
}

.year-selector-wrapper::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-muted);
}

.year-select:hover {
    background: var(--bg-secondary);
    color: var(--text-main);
}

.year-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Diagnostic Ranking Grid */
.diagnostic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

@media (max-width: 640px) {
    .diagnostic-grid {
        grid-template-columns: 100%;
    }
}

.diagnostic-rank-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    gap: 1.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    min-width: 0;
}

.diagnostic-rank-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}


.diag-rank-info {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.diag-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.diag-rank-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-main);
    border-radius: 4px;
    font-weight: 700;
    white-space: nowrap;
    border: 1px solid var(--border-color);
}

.diag-rank-badge.rank-god {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: white;
    border: none;
}

.diag-rank-badge.rank-expert {
    background: rgba(16, 124, 65, 0.1);
    color: var(--primary-color);
    border-color: rgba(16, 124, 65, 0.2);
}

.diag-user-name {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}

.diag-type-badge {
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Consolas', monospace;
    background: var(--bg-secondary);
    color: var(--primary-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    display: block;
    width: 100%;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

.diag-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.diag-stats strong {
    color: var(--text-main);
}

.diag-date {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: auto;
}