:root {
    --primary: #0d7f6a;
    --primary-light: #10a386;
    --primary-dark: #085c4d;
    --accent: #ff6b35;
    --accent-light: #ff8c61;
    --accent-dark: #e85a2a;
    --text: #1a1a1a;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #fafbfc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --warning: #f59e0b;
    --success: #10b981;
    --gradient-1: linear-gradient(135deg, #0d7f6a 0%, #10a386 100%);
    --gradient-2: linear-gradient(135deg, #ff6b35 0%, #ff8c61 100%);
    --gradient-bg: linear-gradient(180deg, #fafbfc 0%, #f8fafc 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-primary: 0 10px 25px -5px rgba(13, 127, 106, 0.2);
    --shadow-accent: 0 10px 25px -5px rgba(255, 107, 53, 0.25);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

body {
    font-family: 'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gradient-bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

/* Header */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-light);
    padding: 40px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

h1 {
    font-family: 'Fraunces', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-light);
    font-weight: 400;
    max-width: 700px;
    line-height: 1.5;
}

.disclaimer {
    background: linear-gradient(135deg, #fff7ed 0%, #fffbf5 100%);
    border-left: 4px solid var(--accent);
    padding: 20px 24px;
    margin: 28px 0 0;
    border-radius: var(--radius);
    font-size: 0.95rem;
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

/* Main Layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 60px 0 100px;
    align-items: start;
    animation: fadeInUp 0.6s ease-out;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Sections */
section {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

section:hover {
    box-shadow: var(--shadow-lg);
}

.sticky-results {
    position: sticky;
    top: 200px;
}

h2 {
    font-family: 'Fraunces', serif;
    font-size: 2rem;
    color: var(--text);
    margin-bottom: 32px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.01em;
}

h3 {
    font-family: 'Fraunces', serif;
    font-size: 1.5rem;
    color: var(--text);
    margin: 36px 0 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* Form Controls */
.form-group {
    margin-bottom: 28px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.helper-text {
    display: block;
    font-size: 0.875rem;
    color: var(--text-lighter);
    margin-top: 6px;
    line-height: 1.5;
}

input[type="number"],
input[type="text"],
select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    background: var(--surface);
    color: var(--text);
    font-weight: 500;
}

input[type="number"]:hover,
input[type="text"]:hover,
select:hover {
    border-color: var(--primary-light);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(13, 127, 106, 0.1);
    background: #fefefe;
}

/* Toggle Switch */
.toggle-group {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}

.toggle-switch {
    position: relative;
    width: 56px;
    height: 30px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border);
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 30px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background: white;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

input:checked + .toggle-slider {
    background: var(--gradient-1);
    box-shadow: inset 0 2px 4px rgba(13, 127, 106, 0.2);
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

input:focus + .toggle-slider {
    box-shadow: 0 0 0 4px rgba(13, 127, 106, 0.1);
}

/* Advanced Toggle Button */
.advanced-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    color: var(--primary);
    transition: all 0.2s ease;
    margin: 16px 0;
}

.advanced-toggle:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.advanced-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
}

.advanced-section.open {
    max-height: 3000px;
    opacity: 1;
}

/* Results Section */
.results {
    animation: fadeInUp 0.5s ease;
}

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

.price-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 32px 0;
}

.price-card {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
    border: 2px solid var(--border-light);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.price-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.price-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.price-card:hover::before {
    opacity: 1;
}

.price-card.featured {
    background: linear-gradient(135deg, #f0fdfa 0%, #ecfdf5 100%);
    border: 2px solid var(--primary);
    position: relative;
    transform: scale(1.05);
    box-shadow: var(--shadow-primary);
}

.price-card.featured::before {
    opacity: 1;
    height: 6px;
    background: var(--gradient-1);
}

.price-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.price-card.featured::after {
    content: "Recommended";
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-1);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: var(--shadow);
}

.price-label {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    margin-bottom: 12px;
}

.price-amount {
    font-family: 'Fraunces', serif;
    font-size: 2.75rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    line-height: 1;
    margin: 8px 0;
    letter-spacing: -0.02em;
}

.price-period {
    font-size: 0.875rem;
    color: var(--text-lighter);
    margin-top: 8px;
    font-weight: 500;
}

/* Breakdown */
.breakdown {
    background: linear-gradient(135deg, #fafbfc 0%, #f8fafc 100%);
    padding: 24px;
    border-radius: var(--radius);
    margin: 28px 0;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.breakdown-toggle {
    cursor: pointer;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    transition: color 0.2s ease;
}

.breakdown-toggle:hover {
    color: var(--primary);
}

.breakdown-toggle::after {
    content: "▼";
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.875rem;
    color: var(--primary);
}

.breakdown-toggle.open::after {
    transform: rotate(180deg);
}

.breakdown-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.breakdown-content.open {
    max-height: 1000px;
    margin-top: 20px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
    gap: 16px;
}

.breakdown-item:last-child {
    border-bottom: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary);
    padding-top: 16px;
    margin-top: 8px;
    border-top: 2px solid var(--border);
}

.breakdown-label {
    color: var(--text);
    flex: 1;
}

.breakdown-value {
    font-weight: 600;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

/* Confidence Meter */
.confidence-meter {
    margin: 28px 0;
    padding: 20px 24px;
    background: linear-gradient(135deg, #fafbfc 0%, #f8fafc 100%);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
}

.confidence-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}

.confidence-bar {
    height: 10px;
    background: var(--border-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.confidence-fill {
    height: 100%;
    background: var(--gradient-1);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.confidence-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Alerts */
.alert {
    padding: 18px 24px;
    border-radius: var(--radius);
    margin: 20px 0;
    font-size: 0.95rem;
    display: flex;
    align-items: start;
    gap: 14px;
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
}

.alert-warning {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-left: 4px solid var(--warning);
    color: #92400e;
}

.alert-info {
    background: linear-gradient(135deg, #f0fdfa 0%, #ccfbf1 100%);
    border-left: 4px solid var(--success);
    color: #065f46;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 32px 0;
}

button {
    padding: 16px 28px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

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

.btn-secondary {
    background: var(--surface);
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.advanced-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: linear-gradient(135deg, #fafbfc 0%, #f8fafc 100%);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    color: var(--text);
    transition: all 0.3s ease;
    margin: 20px 0;
}

.advanced-toggle:hover {
    background: var(--gradient-1);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* How It Works */
.how-it-works {
    background: linear-gradient(135deg, #f0fdfa 0%, #ecfdf5 100%);
    padding: 48px;
    border-radius: var(--radius-xl);
    margin: 60px 0;
    box-shadow: var(--shadow);
    border: 1px solid rgba(16, 185, 129, 0.1);
}

.how-it-works h2 {
    margin-bottom: 32px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.how-it-works ol {
    margin-left: 28px;
}

.how-it-works li {
    margin-bottom: 20px;
    padding-left: 12px;
    color: var(--text);
    line-height: 1.7;
}

.how-it-works strong {
    color: var(--primary);
    font-weight: 700;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
    color: white;
    padding: 48px 0;
    text-align: center;
    margin-top: 80px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

footer a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

footer a:hover {
    color: white;
}

/* Grid Layout for Form Groups */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    margin-left: 4px;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    white-space: nowrap;
    font-size: 0.85rem;
    font-weight: 400;
    z-index: 10;
    margin-bottom: 8px;
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Responsive */
@media (max-width: 768px) {
    .price-cards {
        grid-template-columns: 1fr;
    }

    section {
        padding: 28px 24px;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    button {
        width: 100%;
        justify-content: center;
    }

    .how-it-works {
        padding: 32px 24px;
    }

    .sticky-results {
        position: relative;
        top: 0;
    }

    .main-content {
        gap: 28px;
        margin: 40px 0 60px;
    }

    .price-card.featured {
        transform: scale(1);
    }

    .price-card.featured:hover {
        transform: translateY(-4px);
    }
}

/* Presets */
.preset-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.preset-chip {
    padding: 8px 16px;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-chip:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.preset-chip.active {
    background: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
}