:root {
    --primary-hue: 250;
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary-color: hsl(var(--primary-hue), 90%, 60%);
    --primary-glow: hsl(var(--primary-hue), 90%, 60%, 0.5);
    --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);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background Animations */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: #4f46e5;
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 350px;
    height: 350px;
    background: #8b5cf6;
    top: 40%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes move {
    from {
        transform: translate(0, 0) scale(1);
    }

    to {
        transform: translate(50px, -50px) scale(1.1);
    }
}

/* Glass Panel */
.container {
    width: 100%;
    max-width: 500px;
    padding: 2.5rem;
    border-radius: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin: 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Form Elements */
.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

input[type="number"] {
    width: 100%;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: white;
    font-size: 1.25rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Language Toggle */
.language-selector {
    margin-bottom: 2rem;
}

.toggle-container {
    display: flex;
    background: var(--input-bg);
    padding: 4px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

input[type="radio"] {
    display: none;
}

.toggle-btn {
    flex: 1;
    text-align: center;
    padding: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: var(--text-muted);
    margin: 0;
    /* Override label margin from above */
    text-transform: none;
    /* Override valid for inputs */
    letter-spacing: normal;
}

input[type="radio"]:checked+.toggle-btn {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

/* Result Area */
.result-area {
    position: relative;
}

.output-wrapper {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    padding: 1rem;
    min-height: 80px;
}

.result-text {
    flex: 1;
    font-size: 1.1rem;
    line-height: 1.5;
    word-break: break-word;
    color: #e2e8f0;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s;
    margin-left: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.icon-btn:active {
    transform: scale(0.95);
}

.feedback-msg {
    position: absolute;
    bottom: -30px;
    right: 0;
    font-size: 0.8rem;
    color: #4ade80;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.feedback-msg.show {
    opacity: 1;
    transform: translateY(0);
}