:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(148, 163, 184, 0.1);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 40%);
    z-index: -1;
}

header {
    padding: 2rem;
    text-align: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    background: linear-gradient(to right, #818cf8, #e879f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    max-width: 600px;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.card h2 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-placeholder {
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 0.5rem;
    object-fit: contain;
}

.hidden {
    display: none !important;
}

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

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

.form-group label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

input, select {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.75rem;
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus {
    border-color: var(--primary-color);
}

/* Slider */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    margin-top: -6px;
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), #818cf8);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    width: 100%;
    padding: 0.75rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 0.75rem;
    font-size: 0.9rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.2s;
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    color: var(--text-color);
}

/* Result Section */
.result-section {
    text-align: center;
}

.price-display {
    margin: 2rem 0;
}

.currency {
    font-size: 1.5rem;
    color: var(--text-muted);
    vertical-align: top;
    margin-right: 0.25rem;
}

.amount {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.analysis-box {
    background: rgba(15, 23, 42, 0.3);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
}

.analysis-box h3 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.tag {
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 500;
}

.breakdown {
    text-align: left;
    margin-bottom: 2rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
}

.breakdown-item.highlight {
    color: var(--text-color);
    font-weight: 600;
    border-bottom: none;
}

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

.result-section:not(.hidden) {
    animation: fadeIn 0.5s ease forwards;
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}