/* ============================================================
   BuildCostCheck — app.css
   Clean one-input feasibility engine UI
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; overflow-x: hidden; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

:root {
    --bg: #f7f8fa;
    --bg-card: #ffffff;
    --bg-input: #f1f3f7;
    --border: #e2e5eb;
    --text: #374151;
    --text-dim: #6b7280;
    --text-bright: #111827;
    --accent: #2563eb;
    --accent-glow: rgba(37,99,235,0.10);
    --green: #16a34a;
    --red: #dc2626;
    --orange: #ea580c;
    --yellow: #ca8a04;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
    --max-w: 960px;
}

/* ============================================================
   TOP NAV
   ============================================================ */
.topnav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.topnav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-bright);
    letter-spacing: -0.5px;
}
.logo:hover { text-decoration: none; }
.nav-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dim);
    transition: color 0.2s;
}
.nav-link:hover { color: var(--text-bright); text-decoration: none; }

/* ============================================================
   LANDING PAGE — HERO
   ============================================================ */
.landing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 100px 24px 60px;
    text-align: center;
}
.landing-inner {
    max-width: 600px;
    width: 100%;
}
.landing-tag {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 20px;
}
.landing h1 {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--text-bright);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 18px;
}
.landing-sub {
    font-size: 1.15rem;
    color: var(--text-dim);
    line-height: 1.7;
    margin-bottom: 32px;
}
.landing h1 em { font-style: italic; color: var(--accent); }
.landing-sub strong { color: var(--text); }

/* Search box */
.search-box {
    position: relative;
    max-width: 560px;
    margin: 0 auto;
}
.search-input {
    width: 100%;
    padding: 18px 140px 18px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-bright);
    font-size: 1.05rem;
    font-family: inherit;
    outline: none;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.25s, box-shadow 0.25s;
}
.search-input::placeholder { color: var(--text-dim); }
.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
}
.search-btn {
    position: absolute;
    right: 6px;
    top: 6px;
    bottom: 6px;
    padding: 0 28px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 1px 3px rgba(37,99,235,0.25);
}
.search-btn:hover { background: #1d4ed8; box-shadow: 0 2px 8px rgba(37,99,235,0.35); }
.search-btn:active { transform: scale(0.97); }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.search-hint {
    margin-top: 12px;
    font-size: 0.82rem;
    color: var(--text-dim);
}

/* Social proof bar */
.social-proof-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 24px 0;
    margin-bottom: 48px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.proof-item { text-align: center; }
.proof-num {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.5px;
}
.proof-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 2px;
}
.proof-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

/* How it works */
.how-it-works {
    margin-top: 80px;
    max-width: 900px;
}
.how-it-works h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 32px;
}
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
    text-align: left;
}
.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, transform 0.2s;
}
.step:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.step-num {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-weight: 800;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}
.step h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 6px;
}
.step p {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* Loading overlay */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.92);
    z-index: 200;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.loading-overlay.active { display: flex; }
.spinner {
    width: 48px; height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
    margin-top: 24px;
    font-size: 1.1rem;
    color: var(--text);
    font-weight: 600;
}
.loading-sub {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* ============================================================
   REPORT PAGE
   ============================================================ */
.report {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 80px 24px 60px;
}
.report-header {
    text-align: center;
    margin-bottom: 40px;
}
.report-tag {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 12px;
}
.report-address {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-bright);
    margin-bottom: 8px;
    line-height: 1.3;
}
.report-meta {
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}
.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.card-desc {
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-bottom: 20px;
}
.sub-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin: 24px 0 12px;
}
.sub-title:first-of-type { margin-top: 0; }

/* Deal card */
.deal-card {
    border: 1px solid var(--green);
    background: linear-gradient(135deg, rgba(22,163,74,0.06) 0%, var(--bg-card) 100%);
}
.deal-card.deal-yellow {
    border-color: var(--yellow);
    background: linear-gradient(135deg, rgba(202,138,4,0.06) 0%, var(--bg-card) 100%);
}
.deal-card.deal-orange {
    border-color: var(--orange);
    background: linear-gradient(135deg, rgba(234,88,12,0.06) 0%, var(--bg-card) 100%);
}
.deal-card.deal-red {
    border-color: var(--red);
    background: linear-gradient(135deg, rgba(220,38,38,0.06) 0%, var(--bg-card) 100%);
}
.deal-inner {
    display: flex;
    gap: 32px;
    align-items: center;
}
.deal-score {
    text-align: center;
    min-width: 100px;
}
.deal-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-bright);
}
.deal-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
    margin-top: 4px;
}
.deal-details { flex: 1; }
.deal-details > p {
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 20px;
    line-height: 1.6;
}
.deal-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.stat {
    background: rgba(0,0,0,0.03);
    border-radius: var(--radius-sm);
    padding: 14px;
    text-align: center;
}
.stat-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}
.stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-bright);
}
.text-green { color: var(--green) !important; }
.text-red { color: var(--red) !important; }

/* KV Grid */
.kv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.kv {
    display: flex;
    flex-direction: column;
    padding: 12px;
    background: rgba(0,0,0,0.03);
    border-radius: var(--radius-sm);
}
.kv-k {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}
.kv-v {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-bright);
}

/* Comps grid */
.comps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
.comp-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 16px;
}
.comp-head {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}
.comp-num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
}
.comp-dist {
    font-size: 0.75rem;
    color: var(--text-dim);
}
.comp-addr {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 6px;
}
.comp-price {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--green);
    margin-bottom: 8px;
}
.comp-details {
    display: flex;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-bottom: 4px;
}
.comp-meta {
    font-size: 0.75rem;
    color: var(--text-dim);
    opacity: 0.7;
}

/* Value summary */
.value-summary {
    background: rgba(59,130,246,0.06);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: var(--radius-sm);
    padding: 24px;
    text-align: center;
}
.value-summary h3 {
    font-size: 1rem;
    color: var(--text-bright);
    margin-bottom: 16px;
}
.value-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}
.vb-item {
    padding: 12px;
    border-radius: var(--radius-sm);
    background: rgba(0,0,0,0.03);
}
.vb-highlight {
    background: rgba(59,130,246,0.12);
    border: 1px solid rgba(59,130,246,0.3);
}
.vb-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 4px;
}
.vb-val {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
}
.value-point {
    font-size: 0.9rem;
    color: var(--text-dim);
}
.value-point strong {
    color: var(--text-bright);
    font-size: 1.1rem;
}
.value-method {
    font-size: 0.78rem;
    color: var(--text-dim);
    opacity: 0.7;
}

/* Cost tables */
.cost-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-bottom: 16px;
}
.cost-table th {
    text-align: left;
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
}
.cost-table th:not(:first-child) { text-align: right; }
.cost-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
.cost-table td:not(:first-child) { text-align: right; font-variant-numeric: tabular-nums; }
.total-row td {
    font-weight: 800;
    color: var(--text-bright);
    border-top: 2px solid var(--border);
    border-bottom: none;
}
.checklist-table td { font-size: 0.85rem; }
.note-cell { max-width: 400px; font-size: 0.82rem !important; color: var(--text-dim) !important; }

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.badge-clears { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-tight { background: rgba(234,179,8,0.15); color: var(--yellow); }
.badge-fails { background: rgba(239,68,68,0.15); color: var(--red); }
.badge-pass { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-verify { background: rgba(234,179,8,0.15); color: var(--yellow); }
.badge-action_required { background: rgba(239,68,68,0.15); color: var(--red); }
.badge-resolved { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-low { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-moderate { background: rgba(245,158,11,0.15); color: var(--orange); }
.badge-high { background: rgba(239,68,68,0.15); color: var(--red); }

/* Risk items */
.risk-item {
    padding: 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    background: rgba(0,0,0,0.02);
    border-left: 3px solid var(--border);
}
.risk-item.risk-resolved { border-left-color: var(--green); }
.risk-item.risk-low { border-left-color: var(--green); }
.risk-item.risk-moderate { border-left-color: var(--orange); }
.risk-item.risk-high { border-left-color: var(--red); }
.risk-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}
.risk-head strong { color: var(--text-bright); font-size: 0.95rem; }
.risk-item p {
    font-size: 0.88rem;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 6px;
}
.risk-mitigation { color: var(--text) !important; }

/* Rec items */
.rec-item {
    padding: 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    background: rgba(0,0,0,0.02);
    border-left: 3px solid var(--border);
}
.rec-good { border-left-color: var(--green); }
.rec-warn { border-left-color: var(--orange); }
.rec-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}
.rec-head strong { color: var(--text-bright); font-size: 0.95rem; }
.rec-item p {
    font-size: 0.88rem;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 4px;
}
.rec-cost { font-size: 0.82rem !important; color: var(--text) !important; }
.rec-advice { color: var(--text) !important; }

/* Disclaimer */
.disclaimer-card {
    background: transparent;
    border: 1px dashed var(--border);
}
.disclaimer-card p {
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.7;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 32px 24px;
    border-top: 1px solid var(--border);
}
.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
}
.footer-logo {
    font-weight: 800;
    color: var(--text-dim);
    font-size: 0.9rem;
}
.site-footer p {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 6px;
    opacity: 0.6;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .landing h1 { font-size: 2rem; }
    .landing-sub { font-size: 1rem; margin-bottom: 32px; }
    .search-input { padding-right: 16px; font-size: 0.95rem; }
    .search-box { display: flex; flex-direction: column; }
    .search-btn {
        position: relative;
        right: auto; top: auto; bottom: auto;
        width: 100%;
        padding: 16px;
        margin-top: 10px;
        border-radius: var(--radius-sm);
        font-size: 1rem;
    }
    .steps { grid-template-columns: 1fr; }
    .social-proof-bar { gap: 20px; flex-wrap: wrap; padding: 20px 16px; }
    .proof-num { font-size: 1.25rem; }
    .proof-label { font-size: 0.68rem; }
    .proof-divider { height: 28px; }
    .deal-inner { flex-direction: column; text-align: center; }
    .deal-stats { grid-template-columns: 1fr; }
    .deal-num { font-size: 2rem; }
    .kv-grid { grid-template-columns: 1fr; }
    .comps-grid { grid-template-columns: 1fr; }
    .value-bar { grid-template-columns: 1fr; }
    .cost-table { font-size: 0.78rem; overflow-x: auto; display: block; }
    .cost-table th, .cost-table td { padding: 8px 6px; white-space: nowrap; }
    .report-address { font-size: 1.3rem; word-break: break-word; }
    .report { padding: 72px 16px 40px; }
    .card { padding: 24px 18px; overflow: hidden; }
    .adj-table { font-size: 0.72rem; overflow-x: auto; display: block; }
    .adj-table th, .adj-table td { padding: 6px 4px; white-space: nowrap; }
    .topnav-inner { padding: 0 16px; }
    .infra-checks { gap: 12px; }
    .how-it-works { margin-top: 48px; }
    .value-summary { padding: 16px; }
}

@media (max-width: 480px) {
    .landing { padding: 80px 16px 40px; }
    .landing h1 { font-size: 1.6rem; line-height: 1.2; }
    .landing-sub { font-size: 0.92rem; margin-bottom: 24px; }
    .social-proof-bar { gap: 16px; padding: 16px 12px; }
    .proof-divider { display: none; }
    .report { padding: 64px 12px 32px; }
    .card { padding: 20px 14px; overflow: hidden; }
    .cost-table th:first-child, .cost-table td:first-child { max-width: 100px; word-wrap: break-word; }
    .deal-stats .stat { padding: 12px 10px; }
    .stat-label { font-size: 0.7rem; letter-spacing: 0.3px; }
    .stat-value { font-size: 1.1rem; }
    .topnav-inner { padding: 0 12px; height: 54px; }
    .logo { font-size: 1rem; }
    .nav-link { font-size: 0.78rem; }
    .nav-btn { padding: 8px 14px; font-size: 0.78rem; }
}