:root {
    --primary: #6495f7;
    --primary-light: #9b6bff;
    --danger: #ff4d4f;
    --danger-light: #ff7875;
    --bg-color: #05050a;
    --card-bg: #12121e;
    --text-main: #f0f2ff;
    --text-muted: #8892b0;
    --border-color: rgba(255,255,255,0.07);
    --border: rgba(255,255,255,0.07);
    --nav-bg: #0c0c14;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.9);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius: 14px;
}



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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--card-bg);
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

.app-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

.back-btn {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    margin-right: 20px;
}

.app-header h1 { font-size: 1.25rem; font-weight: 700; }

.content { padding: 20px; }

.description-box {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--primary);
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
}

.input-section { margin-bottom: 30px; }

.form-group { margin-bottom: 16px; }

.highlight-input {
    background-color: var(--bg-color);
    padding: 16px;
    border-radius: var(--radius);
    border: 1px dashed var(--primary);
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text-main);
    font-size: 1.1rem;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-primary {
    width: 100%;
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 10px;
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.4);
}

.btn-primary:active { transform: scale(0.98); }

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.comparison-card {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    text-align: center;
    position: relative;
}

.highlight-card {
    border-color: var(--primary);
    background-color: rgba(16, 185, 129, 0.05);
}

.card-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-muted);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
}

.card-badge.success { background-color: var(--primary); }

.comparison-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 10px;
}

.comparison-card h3 {
    font-size: 1.25rem;
    margin: 8px 0;
    color: var(--text-main);
}

.comparison-card .muted-text {
    font-size: 0.8rem;
    opacity: 0.8;
}

.savings-banner {
    background: linear-gradient(135deg, var(--primary), #059669);
    color: white;
    padding: 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 10px 15px -3px rgba(16, 185, 129, 0.3);
}

.savings-banner h3 { font-size: 1rem; opacity: 0.9; margin-bottom: 4px; }
.savings-banner h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 8px; }
.savings-banner p { font-size: 0.95rem; opacity: 0.9; }

[data-theme="light"] {
    --bg-color: #f0f4ff;
    --card-bg: #ffffff;
    --text-main: #0d1829;
    --text-muted: #6880b0;
    --primary: #4f8ef7;
    --primary-light: #7c5bf7;
    --border-color: rgba(79,142,247,0.24);
    --border: rgba(79,142,247,0.24);
}
[data-theme='light'] {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border: #e2e8f0;
    --nav-bg: #ffffff;
}