:root {
    --bg-color: #050505;
    --card-bg: rgba(25, 25, 25, 0.4);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent-purple: #a855f7;
    --accent-purple-glow: rgba(168, 85, 247, 0.4);
    --accent-blue: #0070f3;
    --accent-blue-glow: rgba(0, 112, 243, 0.4);
    --blur: blur(24px);
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: hidden;
    position: relative;
    padding: 6rem 1rem 2rem 1rem;
}

/* Global Nav */
.global-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 5, 5, 0.7);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* Sleek Mesh Gradient Background */
.mesh-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background-color: #000;
    background-image: 
        radial-gradient(at 0% 0%, hsla(271,81%,42%,0.25) 0px, transparent 50%),
        radial-gradient(at 100% 0%, hsla(210,100%,48%,0.2) 0px, transparent 50%),
        radial-gradient(at 100% 100%, hsla(271,81%,42%,0.15) 0px, transparent 50%),
        radial-gradient(at 0% 100%, hsla(210,100%,48%,0.1) 0px, transparent 50%);
    filter: blur(80px);
}

.container {
    max-width: 800px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    padding: 0.4rem 1rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(180deg, #FFFFFF 0%, #A1A1AA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Glassmorphism utility */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.calculator-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.currency-symbol {
    position: absolute;
    left: 1rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 500;
}

input[type="number"], select {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-family: var(--font-stack);
    outline: none;
    transition: all 0.2s ease;
    appearance: none;
}

input[type="number"] {
    padding-left: 2.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

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

select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1.41 0.589966L6 5.16997L10.59 0.589966L12 1.99997L6 7.99997L0 1.99997L1.41 0.589966Z' fill='%23A1A1AA'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

select option {
    background-color: #1a1a1a;
    color: #fff;
}

input:focus, select:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 2px rgba(168, 85, 247, 0.2);
}

.results-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.result-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
}

.stripe-card::before { background: var(--accent-purple); }
.paypal-card::before { background: var(--accent-blue); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.fee-percentage-display {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.05);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.breakdown-item.sub-item {
    padding-left: 0.5rem;
    border-left: 2px solid rgba(255,255,255,0.1);
}

.breakdown-item .value {
    color: var(--text-primary);
    font-weight: 500;
}

.breakdown-item .fee-value {
    color: #ef4444; /* red for fees */
}

.divider {
    height: 1px;
    background: var(--card-border);
    width: 100%;
}

.net-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.125rem;
    font-weight: 600;
    padding: 1rem;
    border-radius: var(--radius-md);
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--card-border);
}

.glow-purple .net-value {
    color: var(--accent-purple);
    text-shadow: 0 0 12px var(--accent-purple-glow);
}

.glow-blue .net-value {
    color: var(--accent-blue);
    text-shadow: 0 0 12px var(--accent-blue-glow);
}

footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
    .row {
        grid-template-columns: 1fr;
    }
    .results-container {
        grid-template-columns: 1fr;
    }
    h1 {
        font-size: 2rem;
    }
}