:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --primary: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.5);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(15, 23, 42, 0.6);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.container {
    width: 100%;
    max-width: 480px;
}

.calculator-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
}

.title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.subtitle {
    text-align: center;
    color: #e2e8f0;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.input-group {
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0 1.25rem;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow), inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
}

.currency-symbol {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 1.25rem;
    margin-right: 0.5rem;
}

.input-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.75rem;
    font-weight: 700;
    padding: 1rem 0;
    outline: none;
    width: 100%;
}

.input-wrapper input::placeholder {
    color: rgba(148, 163, 184, 0.3);
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.2s ease, background 0.2s ease;
    text-align: center;
}

.result-box:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-2px);
}

.result-box.primary {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.result-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
}

.result-box.primary .result-label {
    color: #a78bfa;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    word-break: break-all;
    background: linear-gradient(to right, #93c5fd, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0.25rem 0;
}

.result-box.secondary {
    padding: 1.5rem;
}

.uppercase {
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mb-2 {
    margin-bottom: 1rem;
}

.equivalents {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.equivalents p {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.equivalents span.value {
    font-weight: 600;
    color: var(--text-main);
}

.exact-box {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.result-exact {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 0.25rem;
}

@media (max-width: 480px) {
    .calculator-card {
        padding: 2rem 1.5rem;
    }
}