:root {
    --border-color: #000;
    --bg-color: #fff;
    --text-color: #000;
    --spacing: clamp(16px, 1.5vw, 32px);
    --sidebar-width: clamp(260px, 22vw, 320px);
    --font-base: clamp(12px, 0.9vw, 14px);
}

* {
    box-sizing: border-box;
}

html {
    font-size: var(--font-base);
}

body {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    font-size: 1rem;
    line-height: 1.5;
    height: 100vh;
    overflow-x: hidden;
    text-transform: uppercase;
}

/* =========================================
   LAYOUT
   ========================================= */
.layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    height: 100vh;
    width: 100vw;
    max-width: 100%;
    overflow: hidden;
}

.sidebar {
    border-right: 2px solid var(--border-color);
    padding: clamp(16px, 1.8vw, 24px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    background: #fff;
    z-index: 10;
    overflow-y: auto;
}

.main-content {
    height: 100%;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* =========================================
   SIDEBAR ELEMENTS (Standardized)
   ========================================= */
.brand {
    font-weight: bold;
    font-size: clamp(1.1rem, 1.6vw, 1.5rem);
    margin-bottom: clamp(24px, 3vw, 40px);
    padding-bottom: clamp(12px, 1.5vw, 20px);
    border-bottom: 1px solid var(--border-color);
    letter-spacing: -1px;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-grow: 1;
}

.nav-item {
    display: block;
    padding: clamp(8px, 1vw, 14px);
    text-decoration: none;
    color: var(--text-color);
    border: 1px solid transparent;
    transition: all 0.1s;
    font-size: clamp(0.85rem, 1vw, 1rem);
}

.nav-item:hover,
.nav-item.active {
    border: 1px solid var(--border-color);
    background: #000;
    color: #fff;
}

.meta-info {
    font-size: 11px;
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing);
}

/* =========================================
   GRID CONTENT (BENTO BOX)
   ========================================= */
.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
}

.panel {
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing);
    min-height: clamp(200px, 25vh, 300px);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.panel-no-padding {
    padding: 0 !important;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0 0 1.5rem 0;
    font-weight: 800;
    letter-spacing: -1px;
}

h2 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin: 0 0 1rem 0;
    text-decoration: underline;
}

p {
    font-size: 1rem;
    max-width: 65ch;
    text-transform: none;
    margin-bottom: 1rem;
}

/* Tables & Metrics */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
    margin-top: 15px;
    text-transform: none;
}

.specs-table th {
    text-align: left;
    padding: 8px 5px;
    border-bottom: 2px solid #000;
    text-transform: uppercase;
}

.specs-table td {
    padding: 8px 5px;
    border-bottom: 1px solid #eee;
}

.metric-row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed #ccc;
    padding-bottom: 5px;
    margin-bottom: 10px;
    font-weight: bold;
}

.metric-note {
    font-size: 0.8em;
    color: #666;
    margin-bottom: 15px;
    text-transform: none;
}

/* Buttons */
.btn {
    display: inline-block;
    border: 1px solid #000;
    background: transparent;
    color: #000;
    padding: clamp(10px, 1.2vw, 18px) clamp(16px, 2vw, 30px);
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    text-decoration: none;
    transition: 0.1s;
    text-align: center;
    font-size: 1rem;
}

.btn:hover {
    background: #000;
    color: #fff;
}

/* Header Bar */
.header-bar {
    border-bottom: 2px solid var(--border-color);
    padding: var(--spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
    flex-shrink: 0;
}

/* Diagrams */
.diagram-container {
    border: 1px solid var(--border-color);
    padding: 10px;
    margin-top: 15px;
    background: #fafafa;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    filter: grayscale(100%);
}

/* =========================================
   DESKTOP GRID LOGIC (Min Width 1024px)
   ========================================= */
@media (min-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr 1fr;
    }

    .schematic-panel {
        grid-column: auto;
    }
}

/* =========================================
   MID-SIZED SCREENS (1000px - 1399px)
   ========================================= */
@media (min-width: 1000px) and (max-width: 1399px) {
    :root {
        --font-base: 11px;
        --spacing: 18px;
        --sidebar-width: 240px;
    }
}

/* =========================================
   LARGE SCREENS (1400px - 1599px)
   ========================================= */
@media (min-width: 1400px) and (max-width: 1599px) {
    :root {
        --font-base: 12px;
        --spacing: 22px;
        --sidebar-width: 280px;
    }
}

/* =========================================
   EXTRA LARGE SCREENS (Min Width 1600px)
   ========================================= */
@media (min-width: 1600px) {
    :root {
        --font-base: 14px;
        --spacing: 32px;
        --sidebar-width: 320px;
    }

    .panel {
        padding: 40px;
    }

    .content-grid>.panel:first-child {
        grid-column: span 1;
    }
}

/* =========================================
   MOBILE RESPONSIVENESS (< 900px)
   ========================================= */
@media (max-width: 900px) {
    body {
        height: auto;
        overflow: auto;
    }

    .layout {
        display: flex;
        flex-direction: column;
        height: auto;
        overflow: visible;
    }

    .sidebar {
        width: 100%;
        flex: 0 0 auto;
        border-right: none;
        border-bottom: 2px solid var(--border-color);
        height: auto;
        position: sticky;
        top: 0;
        flex-direction: row;
        align-items: center;
        padding: 15px;
    }

    .brand {
        margin: 0 20px 0 0;
        padding: 0;
        border: none;
        font-size: 1.2rem;
    }

    .nav {
        flex-direction: row;
        gap: 15px;
    }

    .log-terminal {
        display: none;
    }

    .meta-info {
        display: none;
    }

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

    .sim-container {
        display: block;
        height: auto;
    }

    .controls-area {
        padding: 20px;
    }

    .controls-area>div {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    .comparison-grid {
        display: block;
    }

    .system-col {
        border-right: none;
        border-bottom: 2px solid #000;
        padding: 20px;
    }
}