/* --- Retro Dark Aesthetic Setup --- */
:root {
    --bg-dark: #0d0e15;
    --neon-cyan: #00f3ff;
    --neon-magenta: #ff00ff;
    --text-main: #e0e0e0;
    --border-color: rgba(0, 243, 255, 0.4);
}

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

body {
    font-family: 'Space Mono', monospace;
    background-color: var(--bg-dark);
    /* Retro Grid Background */
    background-image: 
        linear-gradient(rgba(0, 243, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    background-position: center center;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-main);
    overflow: hidden;
    cursor: none; /* Hide default cursor to show our chaser better */
}

/* --- Mouse Cursor Chaser --- */
.cursor-chaser {
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--neon-magenta);
    box-shadow: 0 0 15px var(--neon-magenta), 0 0 30px var(--neon-magenta);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s;
    mix-blend-mode: screen;
}

body:hover .cursor-chaser {
    width: 15px;
    height: 15px;
}

/* --- Retro Converter Card --- */
.container {
    background-color: rgba(13, 14, 21, 0.85);
    border: 2px solid var(--neon-cyan);
    padding: 40px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.2), inset 0 0 20px rgba(0, 243, 255, 0.1);
    z-index: 10;
    opacity: 0;
}

/* Fade in animation on load */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Typography & Header --- */
.header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 20px;
}

.header h1 {
    font-size: 22px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.8);
    margin-bottom: 8px;
}

.header p {
    font-size: 12px;
    color: var(--neon-magenta);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Form Elements --- */
.input-group, .select-box {
    margin-bottom: 24px;
}

label {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: var(--neon-cyan);
}

/* Amount Input Wrapper */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: 16px;
    color: var(--neon-cyan);
}

input[type="number"] {
    width: 100%;
    padding: 14px 16px 14px 40px;
    border: 1px solid var(--border-color);
    background: transparent;
    font-family: 'Space Mono', monospace;
    font-size: 16px;
    color: var(--neon-cyan);
    outline: none;
    transition: all 0.3s ease;
}

input[type="number"]:focus {
    border-color: var(--neon-magenta);
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.3);
}

/* --- Currency Selectors & Swap --- */
.currency-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
}

.select-box {
    flex: 1;
    margin-bottom: 0;
}

.select-container {
    display: flex;
    align-items: center;
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    transition: all 0.3s ease;
}

.select-container:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

.select-container img {
    width: 24px;
    margin-right: 10px;
    filter: grayscale(0%);
}

select {
    width: 100%;
    border: none;
    background: var(--bg-dark);
    font-family: 'Space Mono', monospace;
    font-size: 14px;
    color: var(--neon-cyan);
    outline: none;
    cursor: pointer;
    appearance: none;
    padding: 6px 0;
}

/* Swap Button */
.swap-icon {
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--neon-magenta);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--neon-magenta);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 24px; 
}

.swap-icon:hover {
    background: var(--neon-magenta);
    color: var(--bg-dark);
    box-shadow: 0 0 15px var(--neon-magenta);
}

.swap-icon.rotate {
    animation: spin 0.4s ease-in-out;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(180deg); }
}

/* --- Info & Action --- */
.exchange-rate {
    text-align: center;
    font-size: 12px;
    color: #888;
    margin-bottom: 24px;
    min-height: 21px;
}

button[type="submit"] {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--neon-cyan);
    background: transparent;
    color: var(--neon-cyan);
    font-family: 'Space Mono', monospace;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
}

button[type="submit"]:hover {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    box-shadow: 0 0 20px var(--neon-cyan);
}

/* --- Loader & Result Card --- */
.loader-container {
    text-align: center;
    margin-top: 20px;
    animation: fadeIn 0.3s;
}

.loader {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(0, 243, 255, 0.2);
    border-top-color: var(--neon-cyan);
    border-radius: 50%;
    animation: spin-loader 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin-loader {
    to { transform: rotate(360deg); }
}

.loader-container p {
    font-size: 12px;
    color: var(--neon-cyan);
}

.result-card {
    margin-top: 24px;
    padding: 20px;
    background: transparent;
    border: 1px dashed var(--neon-magenta);
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.from-amount {
    font-size: 14px;
    color: var(--text-main);
    margin-bottom: 4px;
}

.to-amount {
    font-size: 24px;
    font-weight: 700;
    color: var(--neon-magenta);
    text-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
}

.error-message {
    margin-top: 20px;
    padding: 12px;
    border: 1px solid red;
    color: red;
    text-align: center;
    font-size: 12px;
    animation: fadeIn 0.3s;
}

/* --- Responsive --- */
@media (max-width: 480px) {
    .container {
        margin: 20px;
        padding: 24px;
    }
    
    .currency-group {
        flex-direction: column;
        gap: 10px;
    }

    .swap-icon {
        margin-top: 0;
        transform: rotate(90deg);
    }
    
    .swap-icon.rotate {
        animation: spin-mobile 0.4s ease-in-out;
    }
    
    @keyframes spin-mobile {
        0% { transform: rotate(90deg); }
        100% { transform: rotate(270deg); }
    }
}