:root {
    --bg-color: #0e0f10;
    --container-bg: #17191c;
    --card-bg: #1f2226;
    --border-color: #33373d;
    --text-primary: #eef0f2;
    --text-secondary: #9aa0a8;
    --accent-amber: #f5a623;
    --accent-red: #e63946;
    --accent-green: #4caf6d;
    --panel-sunken: rgba(0, 0, 0, 0.35);
    --font-header: 'Bebas Neue', sans-serif;
    --font-body: 'Roboto Condensed', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    --shadow-color: rgba(0, 0, 0, 0.6);

    /* Shared kit mapping */
    --kit-accent: var(--accent-amber);
    --kit-accent-ink: #1a1300;
    --kit-accent-glow: rgba(245, 166, 35, 0.25);
    --kit-surface: var(--card-bg);
    --kit-border: var(--border-color);
    --kit-input-bg: var(--container-bg);
    --kit-error: var(--accent-red);
}

body.light-mode {
    --bg-color: #f7f5f0;
    --container-bg: #ffffff;
    --card-bg: #f0ede4;
    --border-color: #d8d3c4;
    --text-primary: #1c1b17;
    --text-secondary: #5c584c;
    --accent-amber: #b3690a;
    --accent-red: #c0293a;
    --accent-green: #2f7d4f;
    --panel-sunken: rgba(0, 0, 0, 0.05);
    --shadow-color: rgba(0, 0, 0, 0.12);

    /* Shared kit mapping (light theme) */
    --kit-accent: var(--accent-amber);
    --kit-accent-ink: #ffffff;
    --kit-accent-glow: rgba(179, 105, 10, 0.18);
    --kit-surface: var(--card-bg);
    --kit-border: var(--border-color);
    --kit-input-bg: var(--container-bg);
    --kit-error: var(--accent-red);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.top-controls {
    position: fixed;
    top: 20px;
    right: 24px;
    z-index: 1000;
}

.theme-toggle-btn {
    background: var(--container-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 9px 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    box-shadow: 0 4px 10px var(--shadow-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-amber);
}

.station-container {
    width: 100%;
    max-width: 900px;
    background: var(--container-bg);
    border: 2px solid var(--border-color);
    border-top: 6px solid var(--accent-amber);
    border-radius: 8px;
    padding: 36px;
    box-shadow: 0 12px 30px var(--shadow-color);
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.station-icon {
    font-size: 2.6rem;
    text-align: center;
    margin-bottom: 8px;
}

.station-title {
    font-family: var(--font-header);
    font-size: 2.4rem;
    color: var(--accent-amber);
    text-align: center;
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.station-subtitle {
    font-family: var(--font-mono);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 22px;
    letter-spacing: 0.3px;
}

/* HUD Status Bar */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 20px;
    margin-bottom: 20px;
    font-family: var(--font-mono);
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 700;
}

.status-label {
    color: var(--text-secondary);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-value {
    color: var(--accent-amber);
    font-size: 1.05rem;
}

/* Weigh Readout Card */
.weigh-card {
    background: var(--panel-sunken);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-amber);
    border-radius: 6px;
    padding: 22px 24px;
    margin-bottom: 20px;
    text-align: center;
}

.weigh-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--accent-amber);
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.inequality-text {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
}

/* Number Line */
.numberline-wrapper {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px 18px 6px;
    margin-bottom: 16px;
}

.numberline-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 0.6px;
    text-align: center;
}

.numberline-host {
    width: 100%;
    cursor: grab;
    user-select: none;
    touch-action: none;
}

.numberline-host.dragging {
    cursor: grabbing;
}

.numberline-host svg {
    width: 100%;
    height: auto;
    display: block;
}

/* Grumpy Inspector Commentary */
.inspector-panel {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 18px;
}

.inspector-avatar {
    font-size: 2.4rem;
    line-height: 1;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px var(--shadow-color));
}

.inspector-bubble {
    position: relative;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 14px;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    flex: 1;
    min-height: 20px;
    color: var(--text-primary);
}

.inspector-bubble::before {
    content: "";
    position: absolute;
    left: -8px;
    top: 16px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 8px solid var(--border-color);
}

.inspector-bubble.mood-idle {
    border-color: var(--border-color);
    color: var(--text-primary);
}

.inspector-bubble.mood-success {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.inspector-bubble.mood-error {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.inspector-final-line {
    font-family: var(--font-mono);
    font-style: italic;
    color: var(--text-secondary);
    max-width: 620px;
    margin: 0 0 16px;
    font-size: 0.9rem;
}

/* Certify Button */
.certify-btn {
    display: block;
    width: 100%;
    background: var(--accent-amber);
    color: #1a1300;
    border: none;
    padding: 14px;
    font-family: var(--font-header);
    font-size: 1.2rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 6px;
    box-shadow: 0 4px 12px var(--shadow-color);
}

.certify-btn:hover {
    opacity: 0.92;
}

/* Feedback */
.feedback-line {
    font-family: var(--font-mono);
    text-align: center;
    font-size: 0.92rem;
    font-weight: 700;
    min-height: 24px;
    margin-top: 12px;
}

.text-success { color: var(--accent-green); }
.text-error { color: var(--accent-red); }

/* General Screen Centering */
.screen-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10px 0;
}

.action-btn {
    background: var(--accent-amber);
    color: #1a1300;
    border: none;
    padding: 14px 36px;
    font-family: var(--font-header);
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    margin-top: 20px;
    border-radius: 6px;
    box-shadow: 0 4px 12px var(--shadow-color);
}

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

.brief-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 20px 28px;
    text-align: left;
    margin: 20px 0;
    max-width: 680px;
    line-height: 1.7;
    font-size: 0.95rem;
}

.brief-box code {
    font-family: var(--font-mono);
    background: var(--panel-sunken);
    padding: 1px 6px;
    border-radius: 4px;
}

.brief-box ul {
    padding-left: 20px;
}

.brief-box li {
    margin-bottom: 8px;
}

footer {
    margin-top: 24px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    letter-spacing: 0.5px;
}