:root {
    --vwr-bg: #0f172a;
    --vwr-card: #1e293b;
    --vwr-accent: #38bdf8;
    --vwr-accent-glow: rgba(56, 189, 248, 0.15);
    --vwr-text: #f1f5f9;
    --vwr-text-dim: #94a3b8;
    --vwr-border: #334155;
    --vwr-input-bg: #0f172a;
    --vwr-success: #4ade80;
}

.vwr-container {
    font-family: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--vwr-text);
    max-width: 800px;
    margin: 2rem auto;
    background: transparent;
}

.vwr-card {
    background: var(--vwr-card);
    border-radius: 24px;
    border: 1px solid var(--vwr-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

/* Header */
.vwr-header {
    padding: 1.5rem 2rem;
    background: rgba(255,255,255,0.02);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--vwr-border);
}

.vwr-brand { display: flex; align-items: center; gap: 1rem; }
.vwr-logo {
    background: var(--vwr-accent);
    color: var(--vwr-bg);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.vwr-logo svg { width: 24px; height: 24px; }
.vwr-header h1 { font-size: 1.25rem; font-weight: 700; margin: 0; letter-spacing: -0.02em; }
.vwr-header p { font-size: 0.85rem; color: var(--vwr-text-dim); margin: 0; }
.vwr-status { font-size: 0.75rem; font-weight: 600; color: var(--vwr-accent); text-transform: uppercase; letter-spacing: 0.05em; }

/* Navigation */
.vwr-nav {
    display: flex;
    padding: 0.75rem;
    gap: 0.5rem;
    background: rgba(0,0,0,0.2);
}
.vwr-nav-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--vwr-text-dim);
    padding: 0.6rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.vwr-nav-btn.active {
    background: var(--vwr-border);
    color: var(--vwr-accent);
}

/* Inputs */
.vwr-content { padding: 2rem; }
.vwr-panel { display: none; }
.vwr-panel.active { display: block; }

.vwr-input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.vwr-input-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--vwr-text-dim);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.vwr-input-wrapper {
    position: relative;
    background: var(--vwr-input-bg);
    border: 2px solid var(--vwr-border);
    border-radius: 14px;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    transition: all 0.3s;
}

.vwr-input-wrapper:focus-within {
    border-color: var(--vwr-accent);
    box-shadow: 0 0 0 4px var(--vwr-accent-glow);
}

.vwr-main-input, .vwr-sub-input {
    background: transparent !important;
    border: none !important;
    color: var(--vwr-text) !important;
    font-size: 1.5rem !important;
    font-weight: 600 !important;
    width: 100% !important;
    outline: none !important;
    padding: 0 !important;
    font-family: 'JetBrains Mono', monospace !important;
}

/* Chrome/Safari arrows weg */
.vwr-main-input::-webkit-outer-spin-button,
.vwr-main-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.vwr-unit-label { font-size: 1rem; color: var(--vwr-text-dim); font-weight: 700; margin-left: 0.5rem; }

.vwr-lock {
    background: transparent;
    border: none;
    color: var(--vwr-text-dim);
    cursor: pointer;
    margin-left: 0.75rem;
    opacity: 0.3;
    transition: all 0.2s;
}
.vwr-lock.on { color: var(--vwr-accent); opacity: 1; }
.vwr-lock svg { width: 18px; height: 18px; }

/* Dashboard Results */
.vwr-dashboard {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: rgba(0,0,0,0.3);
    padding: 1.5rem;
    gap: 1rem;
}
.vwr-dash-item {
    text-align: center;
    display: flex;
    flex-direction: column;
}
.vwr-dash-label { font-size: 0.65rem; color: var(--vwr-text-dim); text-transform: uppercase; font-weight: 700; }
.vwr-dash-val { font-size: 1.15rem; font-weight: 700; color: var(--vwr-text); font-family: 'JetBrains Mono', monospace; margin: 0.25rem 0; }
.vwr-dash-val.lit { color: var(--vwr-success); }
.vwr-dash-unit { font-size: 0.65rem; color: var(--vwr-text-dim); }

.vwr-result-highlight {
    grid-column: span 2;
    background: var(--vwr-accent-glow);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px dashed var(--vwr-accent);
    text-align: center;
}
.vwr-big-res { font-size: 2rem; font-weight: 800; color: var(--vwr-accent); font-family: 'JetBrains Mono', monospace; }

/* Footer */
.vwr-footer { padding: 1.5rem; text-align: center; }
.vwr-btn-reset {
    background: transparent;
    border: 1px solid var(--vwr-border);
    color: var(--vwr-text-dim);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}
.vwr-btn-reset:hover { background: var(--vwr-border); color: var(--vwr-text); }

@media (max-width: 600px) {
    .vwr-input-grid { grid-template-columns: 1fr; }
    .vwr-dashboard { grid-template-columns: 1fr 1fr; }
    .vwr-result-highlight { grid-column: span 1; }
}