:root {
    --bg-dark: #050507;
    --card-bg: rgba(20, 20, 25, 0.85);
    --cyan: #00f3ff;
    --purple: #bc13fe;
    --text-muted: #6f7182;
    --gauge-track: #2b2b36;
}

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

body {
    background-color: var(--bg-dark);
    background-image: radial-gradient(circle at 50% 50%, rgba(0, 243, 255, 0.05) 0%, transparent 60%);
    font-family: 'Inter', sans-serif;
    /* Mobile Viewport Fixes */
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    padding: 20px;
    overflow-y: auto;
    /* Allow scrolling on small landscape screens */
}

.glass-card {
    width: 100%;
    max-width: 400px;
    padding: 30px;
    border-radius: 24px;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.8);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: auto;
    /* Centers in flex container even if scrolling */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.brand {
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 800;
    margin-bottom: 20px;
}

/* --- GAUGE --- */
.gauge-wrapper {
    position: relative;
    width: 260px;
    height: 260px;
    margin-bottom: -30px;
    /* Fluid resizing for smaller screens */
    max-width: 100%;
    aspect-ratio: 1/1;
}

.gauge-svg {
    width: 100%;
    height: 100%;
    transform: rotate(135deg);
    overflow: visible;
}

.track-bg {
    fill: none;
    stroke: var(--gauge-track);
    stroke-width: 10;
    stroke-linecap: round;
    stroke-dasharray: 330 600;
}

.track-fill {
    fill: none;
    stroke: url(#gradient-dl);
    stroke-width: 10;
    stroke-linecap: round;
    stroke-dasharray: 330 600;
    stroke-dashoffset: 330;
    transition: stroke-dashoffset 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), stroke 0.3s ease;
    filter: drop-shadow(0 0 8px rgba(0, 243, 255, 0.4));
}

.needle-group {
    transform-origin: 100px 100px;
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.needle {
    fill: #fff;
    filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.8));
}

/* --- DISPLAY --- */
.readout {
    position: relative;
    z-index: 5;
    margin-bottom: 30px;
}

.speed-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 64px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -3px;
}

.unit {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 6px;
}

.status-pill {
    display: inline-block;
    margin-top: 10px;
    padding: 5px 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.06);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

/* --- STATS --- */
.stats-grid {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: 15px;
    text-align: left;
    transition: 0.3s;
}

.stat-card.active-dl {
    border-color: var(--cyan);
    background: rgba(0, 243, 255, 0.08);
}

.stat-card.active-ul {
    border-color: var(--purple);
    background: rgba(188, 19, 254, 0.08);
}

.stat-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 20px;
    color: #fff;
}

.start-btn {
    width: 100%;
    padding: 18px;
    background: #fff;
    border: none;
    border-radius: 14px;
    color: #000;
    font-weight: 800;
    text-transform: uppercase;
    cursor: pointer;
    transition: 0.2s;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    /* Prevent tap highlight on mobile */
    -webkit-tap-highlight-color: transparent;
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.15);
}

.start-btn:active {
    transform: scale(0.98);
}

.start-btn:disabled {
    background: #333;
    color: #666;
    transform: none;
    cursor: not-allowed;
}

/* --- MOBILE RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 480px) {
    .glass-card {
        padding: 20px 20px 25px 20px;
    }

    .gauge-wrapper {
        width: 220px;
        height: 220px;
        margin-bottom: -20px;
    }

    .speed-value {
        font-size: 52px;
        /* Smaller font for small screens */
    }

    .stats-grid {
        gap: 10px;
        margin-bottom: 25px;
    }

    .stat-num {
        font-size: 18px;
    }
}

/* Landscape Mode Fix */
@media (max-height: 700px) {
    body {
        align-items: flex-start;
        /* Starts at top to allow scrolling down */
    }
}