@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&display=swap');

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

:root {
    --black: #1a1a1a;
    --charcoal: #2e2e2e;
    --dark-gray: #5a5550;
    --gray: #8a857e;
    --light-gray: #c4c0ba;
    --border: #d9d5cf;
    --bg: #f0eeeb;
    --white: #f9f8f6;
    --primary: #1a1a1a;
}

body {
    font-family: 'Montserrat', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--black);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    position: relative;
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/images/hvac-bg.png') center/cover no-repeat;
    opacity: 0.25;
    z-index: -1;
}

.hidden { display: none !important; }

/* Calculator container */
.calc-container {
    width: 100%;
    max-width: 680px;
    margin: 40px auto;
    background: var(--white);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
}

/* Header */
.calc-header {
    background: #3d3d3d;
    color: var(--white);
    padding: 48px 48px 40px;
}
.calc-header .contractor-name {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    opacity: 0.5;
    margin-bottom: 12px;
}
.calc-header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 26px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.5px;
}
.calc-header p {
    font-size: 14px;
    opacity: 0.6;
    margin-top: 8px;
    font-weight: 400;
}

/* Progress bar */
.progress-bar {
    height: 2px;
    background: var(--border);
}
.progress-fill {
    height: 100%;
    background: var(--charcoal);
    transition: width 0.5s ease;
    width: 0%;
}

/* Form body */
.calc-body {
    padding: 48px;
}

/* Section headers — hidden by default */
.section-title {
    display: none;
}

.question-group {
    margin-bottom: 48px;
}
.question-group:last-of-type {
    margin-bottom: 0;
}

.question-group h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--charcoal);
    margin-bottom: 20px;
    letter-spacing: -0.3px;
}

/* Option cards — single column, card style */
.options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.options.options-single {
    flex-direction: column;
}
.options.options-three {
    flex-direction: column;
}

.option {
    padding: 18px 24px;
    border: 1px solid var(--border);
    background: var(--white);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 16px;
    font-weight: 500;
    color: var(--charcoal);
    font-family: 'Montserrat', sans-serif;
    width: 100%;
    text-align: left;
    display: block;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.option:hover {
    border-color: var(--dark-gray);
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.option.selected {
    border-color: var(--black);
    border-width: 2px;
    background: var(--bg);
    color: var(--black);
    font-weight: 600;
}

/* Text inputs */
.input-group { margin-bottom: 20px; }
.input-group label {
    display: block;
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--dark-gray);
    margin-bottom: 6px;
}
.input-group input, .input-group select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    font-size: 15px;
    font-family: 'Montserrat', sans-serif;
    color: var(--black);
    background: var(--white);
    transition: border-color 0.2s;
}
.input-group input:focus, .input-group select:focus {
    outline: none;
    border-color: var(--black);
}

/* Slider */
.slider-container { margin: 8px 0 0; }
.slider-value {
    text-align: center;
    font-family: 'Montserrat', sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 16px;
    letter-spacing: -1px;
}
.slider-value span {
    font-size: 16px;
    font-weight: 500;
    color: var(--black);
}
input[type="range"] {
    width: 100%;
    height: 2px;
    -webkit-appearance: none;
    background: var(--border);
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--black);
    border-radius: 50%;
    cursor: pointer;
}
.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--gray);
    margin-top: 8px;
}

/* Buttons */
.btn-submit {
    display: block;
    width: 100%;
    padding: 18px 32px;
    background: var(--charcoal);
    color: var(--white);
    border: none;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 48px;
}
.btn-submit:hover { background: var(--black); }
.btn-submit:disabled { background: var(--light-gray); cursor: not-allowed; }

/* Divider */
.divider {
    height: 1px;
    background: var(--border);
    margin: 48px 0;
}

/* Results */
.results-screen {
    padding: 48px;
}
.results-screen h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: -0.5px;
}

.result-card {
    background: var(--bg);
    padding: 32px;
    margin-bottom: 16px;
    border-left: 3px solid var(--charcoal);
}
.result-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
    margin-bottom: 8px;
}
.result-card .big-number {
    font-family: 'Montserrat', sans-serif;
    font-size: 40px;
    font-weight: 800;
    color: var(--black);
    letter-spacing: -1px;
}
.result-card .big-number.green {
    color: var(--black);
}
.result-card p {
    font-size: 14px;
    color: var(--dark-gray);
    margin-top: 4px;
}

/* Savings bar */
.savings-bar { margin: 32px 0; }
.savings-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 8px;
}
.savings-bar-track {
    height: 8px;
    background: var(--border);
    position: relative;
    overflow: hidden;
}
.savings-bar-fill {
    height: 100%;
    background: var(--charcoal);
    transition: width 1.5s ease;
}
.savings-bar-current {
    height: 100%;
    background: var(--black);
    position: absolute;
    top: 0;
    transition: width 1.5s ease;
}

/* Tier cards */
.tier-cards { display: flex; flex-direction: column; gap: 16px; }
.tier-card {
    border: 1px solid var(--border);
    padding: 28px;
    position: relative;
    background: var(--white);
    transition: all 0.2s;
}
.tier-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
.tier-card.recommended { border-color: var(--charcoal); border-width: 2px; }
.tier-badge {
    position: absolute; top: -1px; right: 24px;
    background: var(--charcoal); color: var(--white);
    padding: 4px 16px;
    font-family: 'Montserrat', sans-serif;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.tier-card h4 {
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}
.tier-card .tier-price {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.tier-card .tier-details { font-size: 13px; color: var(--dark-gray); }
.tier-card .tier-details div { padding: 4px 0; }

/* Rebate items */
.rebate-list { display: flex; flex-direction: column; gap: 12px; }
.rebate-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: var(--bg);
    border-left: 3px solid var(--charcoal);
}
.rebate-item .rebate-name {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--charcoal);
}
.rebate-item .rebate-desc { font-size: 12px; color: var(--gray); margin-top: 2px; }
.rebate-item .rebate-amount {
    font-family: 'Montserrat', sans-serif;
    font-size: 22px;
    font-weight: 800;
    color: var(--black);
    white-space: nowrap;
}
.rebate-total {
    text-align: center;
    padding: 32px;
    background: var(--charcoal);
    color: var(--white);
    margin-top: 20px;
}
.rebate-total .label {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.6;
}
.rebate-total .amount {
    font-family: 'Montserrat', sans-serif;
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-top: 4px;
}

/* Lead form */
.lead-form {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}
.lead-form h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}
.lead-form p { font-size: 14px; color: var(--gray); margin-bottom: 24px; }
.lead-form .btn-submit { margin-top: 16px; }

/* Thank you */
.thank-you { text-align: center; padding: 80px 48px; }
.thank-you .check-icon {
    width: 64px; height: 64px;
    border: 2px solid var(--charcoal);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 24px;
    font-size: 28px; font-weight: 700;
}
.thank-you h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
}
.thank-you p { color: var(--gray); font-size: 15px; }

/* Mobile */
@media (max-width: 640px) {
    .calc-container { margin: 0; box-shadow: none; }
    .calc-header { padding: 32px 24px; }
    .calc-header h1 { font-size: 22px; }
    .calc-body { padding: 32px 24px; }
    .results-screen { padding: 32px 24px; }
}