@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&family=Tajawal:wght@400;700&display=swap');

:root {
    --dark-bg: #000000;
    --card-bg: #111111;
    --glass-bg: rgba(17, 17, 17, 0.5);
    --neon-blue: #00e5ff;
    --neon-purple: #d500f9;
    --neon-green: #69f0ae;
    --neon-white: #ffffff;
    --text-color: #f5f5f5;
    --warning-neon: #ffee00;
    --grid-color: rgba(0, 188, 212, 0.05);
}

/* --- Theme Palettes (20 Professional Themes) --- */
body.theme-1 { --neon-blue: #00e5ff; --neon-purple: #d500f9; --neon-green: #69f0ae; }
body.theme-2 { --neon-blue: #ff6e40; --neon-purple: #ff4081; --neon-green: #fff59d; }
body.theme-3 { --neon-blue: #00e676; --neon-purple: #00c853; --neon-green: #a7ffeb; }
body.theme-4 { --neon-blue: #3d5afe; --neon-purple: #651fff; --neon-green: #448aff; }
body.theme-5 { --neon-blue: #e040fb; --neon-purple: #ea80fc; --neon-green: #7c4dff; }
body.theme-6 { --neon-blue: #ff5252; --neon-purple: #ff1744; --neon-green: #ff8a80; }
body.theme-7 { --neon-blue: #2979ff; --neon-purple: #448aff; --neon-green: #64ffda; }
body.theme-8 { --neon-blue: #ff8a65; --neon-purple: #ffab40; --neon-green: #ffd740; }
body.theme-9 { --neon-blue: #f50057; --neon-purple: #ff4081; --neon-green: #ff80ab; }
body.theme-10 { --neon-blue: #9c27b0; --neon-purple: #e040fb; --neon-green: #ffc400; }
body.theme-11 { --neon-blue: #33e2a9; --neon-purple: #12b77c; --neon-green: #a7f6c6; }
body.theme-12 { --neon-blue: #d4e157; --neon-purple: #c0ca33; --neon-green: #e6ee9c; }
body.theme-13 { --neon-blue: #b9f6ca; --neon-purple: #69f0ae; --neon-green: #00e676; }
body.theme-14 { --neon-blue: #f9a825; --neon-purple: #fbc02d; --neon-green: #ffea00; }
body.theme-15 { --neon-blue: #ef5350; --neon-purple: #d32f2f; --neon-green: #ff8a80; }
body.theme-16 { --neon-blue: #42a5f5; --neon-purple: #1e88e5; --neon-green: #64b5f6; }
body.theme-17 { --neon-blue: #5c6bc0; --neon-purple: #3f51b5; --neon-green: #9fa8da; }
body.theme-18 { --neon-blue: #ff9800; --neon-purple: #fb8c00; --neon-green: #ffb74d; }
body.theme-19 { --neon-blue: #009688; --neon-purple: #00796b; --neon-green: #4db6ac; }
body.theme-20 { --neon-blue: #ff8a80; --neon-purple: #ff5252; --neon-green: #f48fb1; }


body {
    font-family: 'Tajawal', 'Orbitron', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.main-content {
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
    transition: margin-right 0.4s ease, margin-left 0.4s ease, transform 0.4s ease;
    background-image: linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
                      linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: moveGrid 30s linear infinite;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body.sidebar-open-right .main-content { margin-right: 280px; }
body.sidebar-open-left .main-content { margin-left: 280px; }

@keyframes moveGrid {
    from { background-position: 0 0; } to { background-position: 50px 50px; }
}

.neon-text, .main-logo {
    color: var(--neon-white);
    text-shadow: 0 0 10px var(--neon-white), 0 0 20px rgba(255, 255, 255, 0.8), 0 0 30px var(--neon-blue), 0 0 40px var(--neon-purple);
}
.neon-text-alert {
    color: var(--warning-neon);
    text-shadow: 0 0 8px var(--warning-neon), 0 0 15px var(--warning-neon), 0 0 25px var(--warning-neon);
    animation: pulseWarning 1.5s infinite alternate;
}
@keyframes pulseWarning {
    from { transform: scale(1); } to { transform: scale(1.03); }
}

/* --- Sidebar Styles --- */
.sidebar {
    position: fixed;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 1100;
    transition: transform 0.4s ease-in-out;
    display: flex;
    flex-direction: column;
}
.sidebar.right {
    right: 0;
    transform: translateX(100%);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}
.sidebar.left {
    left: 0;
    transform: translateX(-100%);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.sidebar.open { transform: translateX(0); }
.sidebar .close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 2.5em;
    color: var(--neon-white);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1002;
    transition: transform 0.3s ease;
}
.sidebar .close-btn:hover {
    transform: rotate(90deg);
}
.sidebar-content {
    padding: 20px 15px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
}
.sidebar-title, .sidebar-subtitle {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    color: var(--neon-green);
    text-shadow: 0 0 8px var(--neon-green);
    margin: 0;
}
.sidebar-title { font-size: 1.8em; margin-bottom: 15px; }
.sidebar-subtitle { font-size: 1.2em; margin-top: 10px; padding-bottom: 5px; border-bottom: 1px solid var(--neon-blue); }

.actions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.sidebar .action-btn {
    width: 100%;
    padding: 10px;
    font-size: 0.9em;
    font-weight: bold;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    color: var(--neon-white);
    background: linear-gradient(45deg, var(--neon-green), var(--neon-blue));
    box-shadow: 0 0 8px var(--neon-green);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.sidebar .action-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 12px var(--neon-blue), 0 0 20px var(--neon-green);
}
.sidebar .save-btn { background: linear-gradient(45deg, var(--neon-purple), var(--neon-blue)); }
.sidebar .add-new-card-btn { background: linear-gradient(45deg, var(--neon-green), var(--neon-purple)); }
.sidebar .add-group-btn { background: linear-gradient(45deg, #DAA520, var(--neon-blue)); }
.sidebar .position-btn { background: linear-gradient(45deg, #ff6347, #ffeb3b); }
#color-theme-toggle { background: linear-gradient(45deg, #8A2BE2, #00BFFF); }


/* --- Cards Display & Sections --- */
#cards-wrapper {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px;
    box-sizing: border-box;
    border: 2px solid transparent;
    border-image: linear-gradient(45deg, var(--neon-blue), var(--neon-purple));
    border-image-slice: 1;
    border-radius: 12px;
    position: relative;
    z-index: 1;
}
#cards-wrapper::-webkit-scrollbar { width: 10px; }
#cards-wrapper::-webkit-scrollbar-track { background: var(--dark-bg); }
#cards-wrapper::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--neon-blue), var(--neon-purple)); border-radius: 10px; }

#content-container { display: flex; flex-direction: column; gap: 25px; }

.card-section {
    background: rgba(0,0,0,0.2);
    border-radius: 10px;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.card-section-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px solid var(--neon-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}
.card-section-header:hover {
    background-color: rgba(255,255,255,0.05);
}
.card-section-header h2 {
    color: var(--neon-green); text-shadow: 0 0 8px var(--neon-green); margin: 0; font-size: 1.5em;
}
.card-section-header .actions {
    display: flex;
    gap: 8px;
    align-items: center;
}
.edit-group-name-btn {
    background: none; border: 1px solid var(--neon-blue); border-radius: 5px; color: var(--neon-blue);
    padding: 4px 8px; font-size: 0.8em; cursor: pointer; transition: all 0.3s ease;
}
.edit-group-name-btn:hover { background-color: var(--neon-blue); color: white; box-shadow: 0 0 10px var(--neon-blue); }

.delete-group-btn {
    background: none; border: 1px solid #ff4500; border-radius: 5px; color: #ff4500;
    padding: 4px 8px; font-size: 0.8em; cursor: pointer; transition: all 0.3s ease;
}
.delete-group-btn:hover { background-color: #ff4500; color: white; box-shadow: 0 0 10px #ff4500; }

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
    justify-content: center;
}
.card {
    background-color: var(--card-bg);
    border: 1px solid transparent;
    border-image: linear-gradient(45deg, var(--neon-blue), var(--neon-purple));
    border-image-slice: 1;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 0 10px rgba(0,0,0,0.4);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 120px;
}
.card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 0 20px var(--neon-blue), 0 0 30px var(--neon-purple);
    border-image: linear-gradient(45deg, var(--neon-green), var(--neon-blue));
}
.card:hover .card-actions { opacity: 1; transform: translateY(0); }

.card-content { z-index: 1; }
.card h3 { color: var(--neon-green); font-size: 1.1em; margin: 0 0 8px; text-shadow: 0 0 6px var(--neon-green); word-wrap: break-word; }
.card p { color: var(--text-color); font-size: 0.9em; line-height: 1.5; word-wrap: break-word; max-height: 65px; overflow: hidden; margin-bottom: 10px; }
.card .copy-message { position: absolute; top: 8px; left: 10px; background-color: var(--neon-green); color: var(--dark-bg); padding: 3px 8px; border-radius: 5px; font-size: 0.7em; opacity: 0; transition: opacity 0.3s ease-in-out; pointer-events: none; box-shadow: 0 0 8px var(--neon-green); }
.card.copied .copy-message { opacity: 1; }
.card-actions { position: absolute; bottom: 0; right: 0; left: 0; background: linear-gradient(to top, var(--card-bg) 60%, transparent); padding: 10px; display: flex; justify-content: flex-end; gap: 8px; opacity: 0; transform: translateY(100%); transition: all 0.3s ease; }
.card-action-btn { background: none; border: 1px solid var(--neon-white); border-radius: 5px; color: var(--neon-white); padding: 4px 8px; font-size: 0.8em; cursor: pointer; transition: all 0.3s ease; }
.card-action-btn.edit-btn:hover { background-color: var(--neon-blue); border-color: var(--neon-blue); }
.card-action-btn.delete-btn:hover { background-color: #ff4500; border-color: #ff4500; }

/* --- Modals, Panels, and Other UI --- */
.hidden { display: none !important; }
.create-card-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1200;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.create-card-panel.active {
    opacity: 1;
    visibility: visible;
}
.create-card-modal {
    background: var(--glass-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 0 30px var(--neon-purple);
    width: 90%;
    max-width: 500px;
    position: relative;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}
.create-card-panel.active .create-card-modal {
    transform: scale(1);
}

.modal-backdrop {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px);
    z-index: 1000; display: flex; justify-content: center; align-items: center;
    opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-backdrop:not(.hidden) { opacity: 1; visibility: visible; }
.modal-content {
    background: var(--glass-bg); padding: 30px; border-radius: 15px; border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 0 30px var(--neon-purple); width: 90%; max-width: 500px;
    position: relative; text-align: center; transform: scale(0.9); transition: transform 0.3s ease;
}
.modal-backdrop:not(.hidden) .modal-content { transform: scale(1); }
.modal-content h2, .create-card-container h2 { color: var(--neon-green); text-shadow: 0 0 10px var(--neon-green); margin-top: 0; margin-bottom: 20px; }
.modal-content p { font-size: 1.1em; line-height: 1.6; margin-bottom: 30px; }
.modal-actions { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.modal-actions .action-btn, .create-card-container .action-btn { width: 100%; padding: 12px 25px; font-size: 1.1em; }
.close-btn { position: absolute; top: 15px; right: 20px; font-size: 2.5em; color: var(--neon-white); background: none; border: none; cursor: pointer; z-index: 1002; }
.create-card-container input, .create-card-container textarea, .create-card-container select, .modal-content input, .modal-content textarea { width: 100%; padding: 15px; border: 1px solid var(--neon-blue); border-radius: 5px; background-color: var(--dark-bg); color: var(--text-color); font-family: 'Tajawal', sans-serif; font-size: 1em; box-sizing: border-box; margin-bottom: 20px; }

.unsaved-warning {
    position: fixed; top: 10px; left: 50%; transform: translateX(-50%);
    background-color: var(--glass-bg); border: 2px solid var(--warning-neon); border-radius: 8px;
    padding: 8px 15px; z-index: 1200; opacity: 0; visibility: hidden;
    transition: all 0.5s ease-in-out; pointer-events: none;
}
.unsaved-warning.visible { opacity: 1; visibility: visible; }

footer { padding: 10px 20px; text-align: center; font-size: 1em; }
#scroll-to-top { display: none; position: fixed; bottom: 20px; z-index: 99; font-size: 24px; border: none; background: linear-gradient(45deg, var(--neon-purple), var(--neon-blue)); color: var(--neon-white); cursor: pointer; padding: 12px 18px; border-radius: 50%; box-shadow: 0 0 15px var(--neon-purple); }
body.sidebar-open-right #scroll-to-top { right: calc(280px + 20px); transition: right 0.4s ease; }
body.sidebar-open-left #scroll-to-top { right: 20px; transition: right 0.4s ease; }
body:not(.sidebar-open-right):not(.sidebar-open-left) #scroll-to-top { right: 20px; }

/* Add new styles for the tooltip */
.tooltip {
    position: fixed;
    background-color: var(--card-bg);
    border: 1px solid var(--neon-blue);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 0 15px var(--neon-blue);
    max-width: 300px;
    word-wrap: break-word;
    z-index: 1000;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}
.tooltip.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.tooltip strong {
    color: var(--neon-green);
    display: block;
    margin-bottom: 5px;
}
.tooltip p {
    color: var(--text-color);
    margin: 0;
    font-size: 0.9em;
}

/* New styles for the control panel toggle and top search */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    margin-bottom: 20px;
    background: var(--glass-bg);
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
}
.main-header-actions {
    display: flex;
    gap: 10px;
}
.control-panel-btn {
    padding: 10px 20px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    border: 2px solid var(--neon-blue);
    border-radius: 8px;
    color: var(--neon-white);
    background: transparent;
    box-shadow: 0 0 10px var(--neon-blue);
    transition: all 0.3s ease;
}
.control-panel-btn:hover {
    background: var(--neon-blue);
    color: var(--dark-bg);
    box-shadow: 0 0 20px var(--neon-blue), 0 0 30px var(--neon-purple);
}
/* === الأنماط الجديدة للأزرار المضافة === */
.excel-btn { border-color: #28a745; box-shadow: 0 0 10px #28a745; }
.excel-btn:hover { background: #28a745; box-shadow: 0 0 20px #28a745, 0 0 30px var(--neon-green); }
.word-btn { border-color: #007bff; box-shadow: 0 0 10px #007bff; }
.word-btn:hover { background: #007bff; box-shadow: 0 0 20px #007bff, 0 0 30px var(--neon-blue); }

.main-logo {
    font-size: 2em;
    font-family: 'Orbitron', sans-serif;
    margin: 0;
}
.file-and-search-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}
.file-input-container {
    padding: 15px; 
    border: 2px dashed var(--neon-blue); 
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    text-align: center;
}
.file-input-label {
    padding: 8px 15px;
    font-size: 0.9em;
    cursor: pointer;
    background: linear-gradient(45deg, var(--neon-purple), var(--neon-blue));
    color: var(--neon-white);
    border-radius: 8px;
    box-shadow: 0 0 8px var(--neon-purple);
    display: inline-block;
    transition: all 0.3s ease;
}
.file-input-label:hover {
    transform: scale(1.05);
    box-shadow: 0 0 12px var(--neon-blue), 0 0 20px var(--neon-purple);
}
#file-name-display {
    margin-top: 10px;
    font-size: 0.8em;
    color: var(--text-color);
}
#btbackup-file {
    display: none;
}
.middle-search-container {
    width: 100%;
    max-width: 600px;
}
#top-search-input {
    width: 100%;
    padding: 12px 20px;
    border: 2px solid var(--neon-purple);
    border-radius: 25px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1em;
    box-sizing: border-box;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    outline: none;
    text-align: right;
}
#top-search-input::placeholder {
    color: #888;
}
#top-search-input:focus {
    border-color: var(--neon-green);
    box-shadow: 0 0 15px var(--neon-green), 0 0 25px rgba(76, 175, 80, 0.4);
}
.search-container {
    display: block;
}
.search-result-group {
    background: rgba(0,0,0,0.4);
    padding: 8px 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    color: var(--neon-green);
    text-shadow: 0 0 5px var(--neon-green);
    font-weight: bold;
    font-size: 1.2em;
    border-left: 4px solid var(--neon-blue);
}

/* === أنماط عارض الملفات الجديد === */
.file-viewer-content {
    background: var(--glass-bg);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 0 30px var(--neon-purple);
    width: 95%;
    height: 90vh;
    max-width: 1200px;
    position: relative;
    display: flex;
    flex-direction: column;
}
.file-viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 15px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--neon-blue);
    position: relative;
}
.file-viewer-header h2 {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green);
    margin: 0;
    white-space: nowrap;
}
.viewer-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex: 1;
    flex-wrap: wrap;
}
.viewer-search-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(0, 229, 255, 0.45);
    padding: 6px 10px;
    border-radius: 999px;
    box-shadow: inset 0 0 10px rgba(0, 229, 255, 0.08);
}
.viewer-search-wrap input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--neon-white);
    min-width: 260px;
    font-family: 'Tajawal', sans-serif;
}
.viewer-search-wrap input::placeholder {
    color: rgba(255,255,255,0.6);
}
.viewer-search-clear-btn {
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.06);
    color: var(--neon-white);
    padding: 4px 10px;
    border-radius: 999px;
    cursor: pointer;
}
.viewer-search-clear-btn:hover {
    background: rgba(0, 229, 255, 0.14);
    border-color: var(--neon-blue);
}
.viewer-search-status {
    color: var(--neon-green);
    font-size: 0.85em;
    white-space: nowrap;
}
.viewer-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}
.viewer-action-btn,
.viewer-control-btn {
    border: 1px solid var(--neon-blue);
    color: var(--neon-white);
    cursor: pointer;
    transition: all 0.25s ease;
}
.viewer-action-btn {
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.18), rgba(213, 0, 249, 0.24));
    padding: 8px 14px;
    border-radius: 999px;
    font-weight: 700;
}
.viewer-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
}
.viewer-control-btn {
    background-color: var(--card-bg);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5em;
}
.viewer-control-btn:hover {
    background-color: var(--neon-blue);
    color: var(--dark-bg);
    box-shadow: 0 0 10px var(--neon-blue);
}
.viewer-sheet-summary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    margin-bottom: 12px;
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(105, 240, 174, 0.35);
    color: var(--neon-green);
    font-size: 0.9em;
}
.viewer-sheets-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
    padding-bottom: 8px;
}
.sheet-tab {
    padding: 9px 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(213, 0, 249, 0.5);
    color: var(--text-color);
    cursor: pointer;
    border-radius: 999px;
    transition: all 0.25s ease;
    box-shadow: inset 0 0 0 1px transparent;
}
.sheet-tab:hover {
    background: linear-gradient(135deg, rgba(213,0,249,0.25), rgba(0,229,255,0.2));
    color: var(--neon-white);
    transform: translateY(-1px);
}
.sheet-tab.active {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    color: #071018;
    border-color: transparent;
    box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
}
.viewer-content-area {
    flex-grow: 1;
    overflow: auto;
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(0,0,0,0.3));
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    padding: 18px;
    transform-origin: top left;
    transition: transform 0.2s ease-in-out;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.35);
}
.viewer-content-area::-webkit-scrollbar { width: 8px; }
.viewer-content-area::-webkit-scrollbar-track { background: var(--dark-bg); }
.viewer-content-area::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--neon-blue), var(--neon-green)); border-radius: 8px; }
.viewer-content-area table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-color);
    backdrop-filter: blur(4px);
}
.viewer-content-area th, .viewer-content-area td {
    border: 1px solid rgba(0, 229, 255, 0.5);
    padding: 10px 12px;
    text-align: right;
    min-width: 120px;
}
.viewer-content-area thead th {
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-blue));
    color: var(--neon-white);
    position: sticky;
    top: 0;
    z-index: 1;
    text-shadow: 0 0 8px rgba(255,255,255,0.5);
}
.viewer-content-area tbody tr:nth-child(even) {
    background-color: rgba(255,255,255,0.03);
}
.viewer-content-area tbody tr:hover {
    background-color: rgba(0, 229, 255, 0.08);
}
.viewer-content-area .excel-cell {
    cursor: copy;
    transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.viewer-content-area .excel-cell:hover {
    background: rgba(105, 240, 174, 0.10);
    box-shadow: inset 0 0 0 1px rgba(105, 240, 174, 0.7);
}
.viewer-content-area .excel-cell.copied-cell {
    background: rgba(105, 240, 174, 0.18);
    box-shadow: inset 0 0 0 1px rgba(105, 240, 174, 0.9);
}
.viewer-content-area .excel-highlight {
    background: rgba(255, 238, 0, 0.38);
    color: #fff;
    padding: 0 2px;
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(255, 238, 0, 0.35);
}
.viewer-content-area p, .viewer-content-area h1, .viewer-content-area h2, .viewer-content-area h3 {
    color: var(--text-color);
}
.viewer-copy-toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    transform: translateX(-50%) translateY(20px);
    background: linear-gradient(135deg, var(--neon-green), var(--neon-blue));
    color: #08131a;
    padding: 10px 16px;
    border-radius: 999px;
    font-weight: 700;
    z-index: 1300;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.45);
}
.viewer-copy-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}


@media (max-width: 768px) {
    body.sidebar-open-right .main-content { margin-right: 0; transform: translateX(-280px); }
    body.sidebar-open-left .main-content { margin-left: 0; transform: translateX(280px); }
    .sidebar.right { transform: translateX(0); box-shadow: -3px 0 15px rgba(0,0,0,0.5); }
    .sidebar.left { transform: translateX(0); box-shadow: 3px 0 15px rgba(0,0,0,0.5); }
    .sidebar.right:not(.open) { transform: translateX(100%); }
    .sidebar.left:not(.open) { transform: translateX(-100%); }
    .main-header { flex-direction: column; gap: 10px; }
    .main-header-actions { flex-wrap: wrap; justify-content: center; }
    .middle-search-container { margin: 0; }
    .file-viewer-header { flex-direction: column; align-items: stretch; }
    .viewer-toolbar { width: 100%; }
    .viewer-search-wrap input { min-width: 120px; }
}
@media (max-width: 480px) {
    .cards-container { grid-template-columns: 1fr; }
    .card-actions { opacity: 1; transform: translateY(0); background: none; }
    .card:hover { transform: none; }
}