:root {
    --bg-dark: #050505;
    --text-main: #f5f5f5;
    --text-muted: #666666;
    --accent-green: #00ff88;
    --accent-red: #ff3366;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    margin: 0;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 5%;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
    margin-bottom: 2rem;
}

.back-btn:hover {
    color: var(--text-main);
}

.tool-header {
    margin-bottom: 2rem;
}

.tool-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    background: linear-gradient(180deg, #ffffff 0%, #a3a3a3 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.tool-desc {
    color: var(--text-muted);
    font-size: 1rem;
}

.calculator-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 2rem;
    backdrop-filter: blur(10px);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #ccc;
    font-weight: 500;
}

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

.input-prefix, .input-suffix {
    position: absolute;
    color: var(--text-muted);
    font-size: 1rem;
}

.input-prefix { left: 15px; }
.input-suffix { right: 15px; }

input[type="number"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px 15px;
    color: var(--text-main);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.3s;
}

.has-prefix { padding-left: 35px !important; }
.has-suffix { padding-right: 35px !important; }

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-green);
}

/* Hide arrows in number inputs */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.results-area {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.result-card {
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.result-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    color: var(--accent-green);
    font-weight: 700;
}

.secondary-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.secondary-result-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
}

.secondary-result-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    color: var(--text-main);
    margin-top: 0.5rem;
}