:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --secondary: #ec4899;
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(255, 255, 255, 0.2);
    --input-focus: #818cf8;
    --success: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
}

/* Background Animated Blobs */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #0284c7, #8b5cf6);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(5%, 10%) scale(1.1); }
    100% { transform: translate(-5%, 5%) scale(0.9); }
}

/* Layout */
.container {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    z-index: 1;
}

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

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #a5b4fc, #f472b6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
}

.logo i {
    color: #a5b4fc;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Glass Panel */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: all 0.4s ease;
}

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

.form-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-header p {
    color: var(--text-muted);
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.full-width {
    grid-column: 1 / -1;
}

label {
    font-size: 0.95rem;
    font-weight: 500;
    color: #cbd5e1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

label i {
    color: var(--primary);
    width: 16px;
}

input[type="number"], select {
    width: 100%;
    padding: 0.875rem 1rem;
    border-radius: 12px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

input::placeholder {
    color: #64748b;
}

input[type="number"]:focus, select:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

select option {
    background-color: var(--bg-color);
    color: white;
}

/* Radio Buttons */
.radio-group {
    display: flex;
    gap: 1rem;
}

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

.radio-label {
    flex: 1;
    padding: 0.875rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
}

input[type="radio"]:checked + .radio-label {
    background: rgba(79, 70, 229, 0.2);
    border-color: var(--primary);
    color: white;
    font-weight: 600;
}

/* Buttons */
.predict-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

.predict-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(79, 70, 229, 0.4);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
}

.predict-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    width: 100%;
    padding: 0.875rem;
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.3s ease;
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Loading & Results */
.hidden {
    display: none !important;
}

#loading-state {
    text-align: center;
    padding: 2rem 0;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 1rem;
}

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

#result-container {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-card {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.05));
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

.result-card h3 {
    color: var(--success);
    margin-bottom: 1rem;
    font-weight: 500;
}

.price-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.currency {
    font-size: 2rem;
    font-weight: 400;
    color: #cbd5e1;
}

#predicted-price {
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #a7f3d0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}

.unit {
    font-size: 1.5rem;
    color: var(--text-muted);
}

.disclaimer {
    font-size: 0.8rem;
    color: #64748b;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 3rem;
    color: #475569;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 640px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .glass-panel {
        padding: 1.5rem;
    }
    
    #predicted-price {
        font-size: 3rem;
    }
}