/* --- SCIENTIFIC THEME --- */
:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --accent: #38bdf8;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --font-ui: 'Inter', sans-serif;
    --font-code: 'Roboto Mono', monospace;
}

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

body {
    display: flex;
    height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-ui);
    overflow: hidden;
}

/* SIDEBAR */
.sidebar {
    width: 300px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
}

.brand h2 {
    font-family: var(--font-code);
    font-size: 1.2rem;
}

.brand .accent {
    color: var(--accent);
}

.control-group label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.3rem;
    display: block;
}

input, textarea {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.8rem;
    border-radius: 4px;
    font-family: var(--font-code);
    font-size: 0.9rem;
}

    input:focus, textarea:focus {
        outline: 1px solid var(--accent);
        border-color: var(--accent);
    }

.data-input-area textarea {
    height: 150px;
    resize: vertical;
}

.hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* BUTTONS */
button {
    padding: 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s;
    width: 100%;
}

.btn-primary {
    background: var(--accent);
    border: none;
    color: #000;
    margin-bottom: 0.5rem;
}

    .btn-primary:hover {
        opacity: 0.9;
    }

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

    .btn-secondary:hover {
        border-color: var(--text-main);
        color: var(--text-main);
    }

.back-link {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
}

/* WORKSPACE */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    overflow-y: auto;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
}

.status {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.online {
    color: #22c55e;
}

.export-tools button {
    width: auto;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* SCALE INFO BAR */
.info-bar {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid var(--accent);
    padding: 0.8rem;
    border-radius: 4px;
}

.scale-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-code);
    font-size: 0.9rem;
}

    .scale-box .label {
        color: var(--accent);
        font-weight: 700;
    }

/* GRAPH AREA */
.graph-container {
    flex: 2;
    min-height: 350px;
    background: #ffffff; /* FORCE WHITE BG FOR GRAPH PAPER LOOK */
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

/* BOTTOM PANEL (Results + Table) */
.bottom-panel {
    display: flex;
    gap: 1rem;
    flex: 1;
    min-height: 200px;
}

.analysis-panel, .table-panel {
    flex: 1;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: 6px;
    display: flex;
    flex-direction: column;
}

    .analysis-panel h3, .table-panel h3 {
        font-size: 0.85rem;
        color: var(--text-muted);
        text-transform: uppercase;
        margin-bottom: 1rem;
    }

.stats-grid {
    display: grid;
    gap: 1rem;
}

.stat-box {
    background: var(--bg-dark);
    padding: 0.8rem;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

    .stat-box .value {
        font-family: var(--font-code);
        color: var(--accent);
        font-weight: 700;
    }

/* DATA TABLE */
.table-wrapper {
    overflow-y: auto;
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 4px;
}

#pointsTable {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-code);
    font-size: 0.85rem;
}

    #pointsTable th {
        background: var(--bg-dark);
        color: var(--text-muted);
        padding: 0.5rem;
        text-align: left;
        position: sticky;
        top: 0;
    }

    #pointsTable td {
        padding: 0.5rem;
        border-bottom: 1px solid var(--border);
        color: var(--text-main);
    }

    #pointsTable tr:nth-child(even) {
        background: rgba(255,255,255,0.02);
    }

@media (max-width: 768px) {
    body {
        flex-direction: column;
        height: auto;
        overflow-y: auto;
    }

    .sidebar {
        width: 100%;
        border-right: none;
    }

    .bottom-panel {
        flex-direction: column;
    }

    .graph-container {
        min-height: 300px;
    }
}