:root {
    --primary: #0b9b53;
    --primary-hover: #087d43;
    --bg: #f4f4f5;
    --panel-bg: #ffffff;
    --text: #27272a;
    --border: #e4e4e7;
    --danger: #ef4444;
}

body.dark-mode {
    --bg: #121212;
    --panel-bg: #1e1e1e;
    --text: #e0e0e0;
    --border: #333333;
    --danger: #ff6b6b;
}

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

body { 
    font-family: system-ui, sans-serif; 
    background: var(--bg); 
    color: var(--text); 
    display: flex; 
    flex-direction: column; 
    min-height: 100vh; 
    transition: background 0.3s, color 0.3s;
    overflow-y: scroll;
}

/* --- NAVBAR STYLES --- */
.navbar {
    background: var(--panel-bg);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between; /* Spreads items Left, Center, Right */
    border-bottom: 1px solid var(--border);
    transition: 0.3s;
}

.logo {
    display: flex;
    align-items: center;
}

.nav-logo {
    max-height: 50px;
    width: auto;
    object-fit: contain;
    display: block;
    cursor: pointer;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

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

.nav-links a.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 5px;
}

.theme-btn {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    padding: 8px 12px;
    border-radius: 6px;
}

.theme-btn:hover {
    background: var(--border);
}

.theme-btn:hover { 
    background: var(--border); 
}

/* --- MAIN LAYOUT --- */
.main-container { 
    display: flex; 
    flex: 1; 
    padding: 20px; 
    gap: 20px; 
    max-width: 1800px; 
    margin: 0 auto; 
    width: 100%; 
}

.hidden { 
    display: none !important; 
}

.content-page { 
    background: var(--panel-bg); 
    padding: 40px; 
    border-radius: 8px; 
    width: 100%; 
    border: 1px solid var(--border); 
    transition: 0.3s; 
    line-height: 1.6; 
}

.content-page h2 { 
    color: var(--primary); 
}

.content-page h3 { 
    border-bottom: none; 
    padding-bottom: 0; 
}

.red-text { 
    color: var(--danger); 
    font-weight: bold; 
}

.left-panel { 
    flex: 0 0 440px; 
    display: flex; 
    flex-direction: column; 
    gap: 12px; 
}

.right-panel { 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
    gap: 20px; 
    min-width: 0; 
}

.panel-section { 
    background: var(--panel-bg); 
    padding: 20px; 
    border-radius: 8px; 
    border: 1px solid var(--border); 
    transition: 0.3s; 
}

h3 { 
    margin-bottom: 15px; 
    font-size: 1.1rem; 
    color: var(--text); 
    border-bottom: 1px solid var(--border); 
    padding-bottom: 8px; 
}

/* --- INPUTS & CONTROLS --- */
.input-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 15px; 
}

.input-col label { 
    display: block; 
    font-size: 0.85rem; 
    margin-bottom: 6px; 
    color: var(--text); 
    font-weight: 600; 
    opacity: 0.8; 
}

.full-width { 
    grid-column: span 2; 
}

input, 
select { 
    width: 100%; 
    padding: 10px; 
    border: 1px solid var(--border); 
    border-radius: 6px; 
    font-size: 0.95rem; 
    background: var(--panel-bg); 
    color: var(--text); 
    transition: 0.3s; 
}

input:focus, 
select:focus { 
    outline: none; 
    border-color: var(--primary); 
    box-shadow: 0 0 5px rgba(11, 155, 83, 0.3); 
}

/* --- TOGGLE SWITCHES --- */
.view-toggle { 
    display: flex; 
    background: rgba(0,0,0,0.04); 
    border-radius: 10px; 
    padding: 5px; 
    gap: 5px; 
    margin-top: 5px; 
}

body.dark-mode .view-toggle { 
    background: rgba(255,255,255,0.05); 
}

.view-btn { 
    flex: 1; 
    padding: 12px 10px; 
    border: none; 
    background: transparent; 
    color: var(--text); 
    border-radius: 8px; 
    cursor: pointer; 
    font-weight: 600; 
    font-size: 0.95rem; 
    transition: all 0.3s ease; 
}

.view-btn:hover { 
    background: rgba(0,0,0,0.05); 
}

body.dark-mode .view-btn:hover { 
    background: rgba(255,255,255,0.05); 
}

.view-btn.active { 
    background: var(--primary); 
    color: white; 
    box-shadow: 0 0 15px rgba(11, 155, 83, 0.5); 
    transform: scale(1.02); 
}

/* --- ADD CELLS & LIST --- */
.manual-add-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 10px; 
    margin-bottom: 15px; 
}

.add-btn { 
    grid-column: span 2; 
    background: var(--border); 
    color: var(--text); 
    border: none; 
    border-radius: 6px; 
    padding: 12px; 
    cursor: pointer; 
    font-weight: bold; 
    transition: 0.2s; 
    font-size: 1rem;
}

.add-btn:hover { 
    background: #d4d4d8; 
}

body.dark-mode .add-btn:hover { 
    background: #444; 
}

.bulk-upload { 
    text-align: center; 
    margin-bottom: 15px; 
    padding: 15px; 
    border: 2px dashed var(--border); 
    border-radius: 6px; 
}

.bulk-upload span { 
    display: block; 
    font-size: 0.85rem;
    color: var(--text); 
    opacity: 0.7; 
    margin-bottom: 10px; 
    font-weight: bold; 
}

.cell-list-container { 
    border: 1px solid var(--border); 
    border-radius: 6px; 
    padding: 12px; 
    height: 180px; 
    overflow-y: auto; 
    margin-bottom: 15px; 
    background: rgba(0,0,0,0.02); 
}

body.dark-mode .cell-list-container { 
    background: rgba(255,255,255,0.02); 
}

.list-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 10px; 
    padding-bottom: 8px; 
    border-bottom: 1px solid var(--border); 
}

#cellCount { 
    font-size: 0.9rem; 
    font-weight: bold; 
}

.clear-btn { 
    background: var(--danger); 
    color: white; 
    border: none; 
    padding: 6px 12px; 
    border-radius: 4px; 
    font-size: 0.8rem; 
    font-weight: bold; 
    cursor: pointer; 
}

#cellList { 
    list-style: none; 
    font-size: 0.9rem; 
}

#cellList li { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 8px 0; 
    border-bottom: 1px solid var(--border); 
}

.cell-info { 
    line-height: 1.4; 
}

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

.del-btn { 
    background: none; 
    border: none; 
    color: var(--danger); 
    font-weight: bold; 
    cursor: pointer; 
    font-size: 1.2rem; 
    padding: 0 10px; 
}

/* --- ACTION BUTTONS --- */
.action-buttons-row { 
    display: flex; 
    gap: 15px; 
    margin-top: 15px; 
    padding-top: 15px; 
    border-top: 1px solid var(--border); 
}

.action-btn { 
    flex: 2; 
    background: var(--primary); 
    color: white; 
    border: none; 
    padding: 15px; 
    border-radius: 8px; 
    font-size: 1.1rem; 
    font-weight: bold; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.1); 
}

.action-btn:hover { 
    background: var(--primary-hover); 
    box-shadow: 0 6px 12px rgba(11, 155, 83, 0.4); 
    transform: translateY(-2px); 
}

.demo-btn { 
    flex: 1; 
    background: #3b82f6; 
}

.demo-btn:hover { 
    background: #2563eb; 
    box-shadow: 0 6px 12px rgba(59, 130, 246, 0.4); 
}

/* --- RESULTS SECTION --- */
.summary-bar { 
    background: var(--panel-bg); 
    border-radius: 8px; 
    padding: 25px; 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); 
    gap: 20px; 
    border: 1px solid var(--border); 
    transition: 0.3s; 
}

.meter-box span { 
    display: block; 
    font-size: 0.8rem; 
    color: var(--text); 
    opacity: 0.7; 
    text-transform: uppercase; 
    font-weight: 600;
}

.meter-box strong { 
    display: block; 
    font-size: 1.4rem; 
    color: var(--text); 
    margin-top: 6px; 
}

.meter-box .highlight { 
    color: var(--primary); 
}

.results-area { 
    background: var(--panel-bg); 
    border-radius: 8px; 
    padding: 25px; 
    border: 1px solid var(--border); 
    flex: 1; 
    overflow-y: auto; 
    transition: 0.3s; 
}

.detailed-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 25px; 
}

@media (max-width: 1300px) { 
    .detailed-grid { 
        grid-template-columns: 1fr; 
    } 
}

.detailed-block { 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    padding: 20px; 
    background: rgba(0,0,0,0.02); 
}

body.dark-mode .detailed-block { 
    background: rgba(255,255,255,0.02); 
}

.detailed-block h4 { 
    margin-bottom: 15px; 
    font-size: 1.1rem; 
    color: var(--text); 
}

/* --- TABLES --- */
.styled-table { 
    width: 100%; 
    border-collapse: collapse; 
    font-size: 0.9rem; 
    background: transparent; 
}

.styled-table th, 
.styled-table td { 
    border: 1px solid var(--border); 
    padding: 10px; 
    text-align: center; 
}

.styled-table th { 
    background: rgba(0,0,0,0.04); 
    font-weight: 600; 
}

body.dark-mode .styled-table th { 
    background: rgba(255,255,255,0.04); 
}

.total-row { 
    font-weight: bold; 
    background: rgba(0,0,0,0.04); 
}

body.dark-mode .total-row { 
    background: rgba(255,255,255,0.04); 
}

.block-stats { 
    margin-top: 15px; 
    font-size: 0.95rem; 
    text-align: center; 
    background: transparent; 
    padding: 10px; 
    border: 1px solid var(--border); 
    border-radius: 6px;
}

/* MOBILE RESPONSIVENESS FIXES       -*/

@media (max-width: 1050px) {
    .main-container {
        flex-direction: column;
        padding: 15px;
        gap: 20px;
    }

    .left-panel {
        flex: none;
        width: 100%;
    }

    .right-panel {
        flex: none;
        width: 100%;
    }

    .navbar {
        flex-direction: column;
        gap: 15px;
        padding: 20px 15px;
    }

    .input-grid, .manual-add-grid {
        grid-template-columns: 1fr;
    }

    .full-width, .add-btn {
        grid-column: span 1;
    }

    .results-area, .detailed-block {
        overflow-x: auto;
    }

    .summary-bar {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 650px) {
    .summary-bar {
        grid-template-columns: 1fr;
    }
    .action-buttons-row {
        flex-direction: column;
    }
    .action-btn {
        width: 100%;
    }

    .styled-table th, .styled-table td {
        padding: 6px 4px;
        font-size: 0.75rem;
        word-break: break-word;
    }

    .detailed-block {
        padding: 12px;
    }

    .detailed-block h4 {
        font-size: 0.95rem;
        margin-bottom: 10px;
    }

    .block-stats {
        font-size: 0.8rem;
        padding: 8px;
    }
}