:root {
    --bg-color: #04111d;
    --card-bg: #0b1a2b;
    --card-border: #1e2d3d;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-hover: #2563eb;
    --input-bg: #152433;
    --badge-bg: #2d261a;
    --badge-text: #eab308;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

.badge {
    display: inline-block;
    background-color: var(--badge-bg);
    color: var(--badge-text);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.input-group {
    margin-bottom: 24px;
}

.input-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

input {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 1.1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.unit {
    position: absolute;
    right: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type=number] {
  -moz-appearance: textfield;
}

.result-card {
    background: linear-gradient(135deg, #0b1a2b 0%, #0d2238 100%);
}

.result-header h2 {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--accent-blue);
    margin-bottom: 20px;
}

.result-item {
    margin-bottom: 24px;
}

.result-item .label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.result-item .value {
    font-size: 2.2rem;
    font-weight: 700;
}

.divider {
    height: 1px;
    background-color: var(--card-border);
    margin: 24px 0;
}

.result-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 1.8rem;
    }
}