/* ── Reset & Base ── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --black:   #171717;
      --orange:  #E85D2F;
      --orange2: #C94D22;
      --blue:    #1F3A5F;
      --cream:   #F4F3EE;
      --mortar:  #9A9690;
      --warm:    #D5D3CD;
      --white:   #FFFFFF;
      --green:   #16A34A;
      --red:     #DC2626;
      --amber:   #D97706;
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: 'DM Sans', sans-serif;
      background: var(--cream);
      color: var(--black);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }

    /* ── Nav (matches v4) ── */
    .nav {
      position: fixed; top: 0; left: 0; right: 0;
      z-index: 100;
      background: var(--white);
      border-bottom: 1px solid var(--warm);
      padding: 0 2rem;
      display: flex; align-items: center; justify-content: space-between;
      height: 60px;
    }
    .nav-logo {
      font-family: 'JetBrains Mono', monospace;
      font-weight: 700; font-size: 1rem;
      letter-spacing: 0.06em;
      color: var(--black); text-decoration: none;
    }
    .nav-cta {
      background: var(--orange); color: var(--white);
      font-family: 'DM Sans', sans-serif;
      font-size: 0.8125rem; font-weight: 700;
      letter-spacing: 0.08em; text-transform: uppercase;
      padding: 8px 18px; border-radius: 3px;
      text-decoration: none;
      transition: background 0.2s;
    }
    .nav-cta:hover { background: var(--orange2); }

    /* ── Page Header ── */
    .page-header {
      padding: 100px 2rem 48px;
      max-width: 860px; margin: 0 auto;
      text-align: center;
    }
    .page-eyebrow {
      font-size: 0.6875rem; font-weight: 700;
      letter-spacing: 0.22em; text-transform: uppercase;
      color: var(--orange); margin-bottom: 16px;
      display: flex; align-items: center; justify-content: center; gap: 8px;
    }
    .eyebrow-dot {
      width: 5px; height: 5px; border-radius: 50%;
      background: var(--orange);
    }
    .page-title {
      font-family: 'JetBrains Mono', monospace;
      font-size: clamp(1.75rem, 5vw, 3.25rem);
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.1;
      color: var(--black);
      margin-bottom: 16px;
    }
    .page-sub {
      font-size: 1.0625rem;
      line-height: 1.7;
      color: var(--mortar);
      max-width: 580px;
      margin: 0 auto 0;
    }

    /* ── Main Calculator Container ── */
    .calc-wrap {
      max-width: 860px;
      margin: 0 auto;
      padding: 0 2rem 80px;
    }

    /* ── Input Panel ── */
    .input-panel {
      background: var(--white);
      border: 1px solid var(--warm);
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 24px;
    }

    .input-header {
      background: var(--black);
      padding: 20px 28px;
      display: flex; align-items: center; gap: 14px;
    }
    .input-header-icon {
      width: 36px; height: 36px;
      background: var(--orange);
      border-radius: 4px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .input-header-icon svg { width: 18px; height: 18px; fill: white; }
    .input-header-text h2 {
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.9375rem; font-weight: 700;
      color: var(--white); letter-spacing: -0.01em;
    }
    .input-header-text p {
      font-size: 0.8125rem; color: rgba(255,255,255,0.45);
      margin-top: 2px;
    }

    .input-body { padding: 28px; }

    .project-textarea {
      width: 100%;
      min-height: 140px;
      border: 1.5px solid var(--warm);
      border-radius: 6px;
      padding: 16px 18px;
      font-family: 'DM Sans', sans-serif;
      font-size: 1rem;
      line-height: 1.65;
      color: var(--black);
      background: var(--cream);
      resize: vertical;
      outline: none;
      transition: border-color 0.2s, background 0.2s;
    }
    .project-textarea:focus {
      border-color: var(--orange);
      background: var(--white);
    }
    .project-textarea::placeholder { color: var(--mortar); }

    /* Example prompts */
    .example-prompts {
      margin-top: 12px;
      display: flex; flex-wrap: wrap; gap: 8px;
    }
    .example-prompt {
      font-size: 0.8rem;
      color: var(--mortar);
      background: var(--cream);
      border: 1px solid var(--warm);
      border-radius: 20px;
      padding: 5px 12px;
      cursor: pointer;
      transition: all 0.2s;
      line-height: 1.4;
    }
    .example-prompt:hover {
      border-color: var(--orange);
      color: var(--orange);
      background: #FEF3EE;
    }

    /* Email gate */
    .email-row {
      display: flex; gap: 12px; margin-top: 16px; align-items: flex-end;
    }
    .email-group { flex: 1; }
    .email-label {
      display: block;
      font-size: 0.75rem; font-weight: 700;
      letter-spacing: 0.1em; text-transform: uppercase;
      color: var(--black); margin-bottom: 6px;
    }
    .email-input {
      width: 100%;
      border: 1.5px solid var(--warm);
      border-radius: 6px;
      padding: 12px 14px;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.9375rem;
      color: var(--black);
      outline: none;
      transition: border-color 0.2s;
    }
    .email-input:focus { border-color: var(--orange); }
    .email-note {
      font-size: 0.75rem; color: var(--mortar);
      margin-top: 5px;
    }

    .calc-btn {
      background: var(--orange);
      color: var(--white);
      border: none;
      border-radius: 6px;
      padding: 12px 28px;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.875rem; font-weight: 700;
      letter-spacing: 0.08em; text-transform: uppercase;
      cursor: pointer;
      transition: all 0.2s;
      white-space: nowrap;
      flex-shrink: 0;
      display: flex; align-items: center; gap: 8px;
      height: 48px;
    }
    .calc-btn:hover:not(:disabled) {
      background: var(--orange2);
      transform: translateY(-1px);
    }
    .calc-btn:disabled {
      background: var(--warm);
      cursor: not-allowed;
      transform: none;
    }
    .calc-btn svg { width: 16px; height: 16px; fill: white; }

    /* ── Loading State ── */
    .loading-panel {
      background: var(--white);
      border: 1px solid var(--warm);
      border-radius: 8px;
      padding: 48px 28px;
      text-align: center;
      display: none;
    }
    .loading-panel.show { display: block; }

    .loading-spinner {
      width: 40px; height: 40px;
      border: 3px solid var(--warm);
      border-top-color: var(--orange);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      margin: 0 auto 20px;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    .loading-text {
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.875rem; color: var(--mortar);
    }
    .loading-steps {
      margin-top: 12px;
      font-size: 0.8125rem; color: var(--warm);
    }
    .loading-step {
      opacity: 0;
      transition: opacity 0.4s;
      margin-top: 4px;
    }
    .loading-step.visible { opacity: 1; }

    /* ── Result Panel ── */
    .result-panel {
      display: none;
      flex-direction: column;
      gap: 20px;
    }
    .result-panel.show { display: flex; }

    /* Estimate hero */
    .estimate-hero {
      background: var(--black);
      border-radius: 8px;
      padding: 32px 28px;
      position: relative;
      overflow: hidden;
    }
    .estimate-hero::before {
      content: '';
      position: absolute; top: 0; left: 0;
      width: 4px; height: 100%;
      background: var(--orange);
    }
    .estimate-label {
      font-size: 0.6875rem; font-weight: 700;
      letter-spacing: 0.2em; text-transform: uppercase;
      color: rgba(255,255,255,0.35);
      margin-bottom: 8px;
    }
    .estimate-range {
      font-family: 'JetBrains Mono', monospace;
      font-size: clamp(2rem, 6vw, 3.5rem);
      font-weight: 700;
      color: var(--orange);
      letter-spacing: -0.03em;
      line-height: 1;
      margin-bottom: 16px;
    }
    .estimate-summary {
      font-size: 0.9375rem;
      line-height: 1.7;
      color: rgba(255,255,255,0.6);
      margin-bottom: 24px;
    }
    .estimate-meta {
      display: flex; gap: 32px; flex-wrap: wrap;
    }
    .meta-item { }
    .meta-label {
      font-size: 0.6875rem; font-weight: 700;
      letter-spacing: 0.15em; text-transform: uppercase;
      color: rgba(255,255,255,0.3);
      display: block; margin-bottom: 4px;
    }
    .meta-value {
      font-family: 'JetBrains Mono', monospace;
      font-size: 1rem; font-weight: 600;
      color: var(--white);
    }

    /* Confidence badge */
    .confidence-badge {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 0.75rem; font-weight: 700;
      letter-spacing: 0.08em; text-transform: uppercase;
      padding: 4px 10px; border-radius: 3px;
      margin-top: 16px;
    }
    .confidence-badge.high { background: rgba(22,163,74,0.15); color: #4ADE80; }
    .confidence-badge.medium { background: rgba(217,119,6,0.15); color: #FCD34D; }
    .confidence-badge.low { background: rgba(220,38,38,0.15); color: #FCA5A5; }
    .confidence-dot {
      width: 6px; height: 6px; border-radius: 50%;
    }
    .confidence-badge.high .confidence-dot { background: #4ADE80; }
    .confidence-badge.medium .confidence-dot { background: #FCD34D; }
    .confidence-badge.low .confidence-dot { background: #FCA5A5; }

    /* Breakdown table */
    .breakdown-panel {
      background: var(--white);
      border: 1px solid var(--warm);
      border-radius: 8px;
      overflow: hidden;
    }
    .panel-header {
      padding: 16px 20px;
      border-bottom: 1px solid var(--warm);
      display: flex; align-items: center; gap: 8px;
    }
    .panel-header-dot {
      width: 8px; height: 8px;
      border-radius: 50%; background: var(--orange);
    }
    .panel-title {
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.8125rem; font-weight: 700;
      color: var(--black); letter-spacing: 0.04em;
    }

    .breakdown-table { width: 100%; border-collapse: collapse; }
    .breakdown-table th {
      background: var(--cream);
      padding: 10px 20px;
      font-size: 0.6875rem; font-weight: 700;
      letter-spacing: 0.12em; text-transform: uppercase;
      color: var(--mortar);
      text-align: left;
    }
    .breakdown-table th:not(:first-child) { text-align: right; }
    .breakdown-table td {
      padding: 14px 20px;
      font-size: 0.9375rem;
      border-bottom: 1px solid var(--cream);
      vertical-align: top;
    }
    .breakdown-table tr:last-child td { border-bottom: none; }
    .breakdown-table td:not(:first-child) {
      text-align: right;
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.875rem;
      white-space: nowrap;
    }
    .breakdown-cat { font-weight: 600; color: var(--black); }
    .breakdown-note {
      font-size: 0.8125rem;
      color: var(--mortar);
      margin-top: 2px;
    }
    .breakdown-table tr:hover td { background: #FAFAF9; }

    /* Factors */
    .factors-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 12px;
    }
    .factor-card {
      border-radius: 6px;
      padding: 16px 18px;
      border-left: 3px solid transparent;
    }
    .factor-card.warning {
      background: #FFF7ED;
      border-left-color: var(--amber);
    }
    .factor-card.info {
      background: #EFF6FF;
      border-left-color: #3B82F6;
    }
    .factor-card.savings {
      background: #F0FDF4;
      border-left-color: var(--green);
    }
    .factor-icon { font-size: 1rem; margin-bottom: 6px; }
    .factor-title {
      font-size: 0.875rem; font-weight: 700;
      color: var(--black); margin-bottom: 4px;
    }
    .factor-detail {
      font-size: 0.8125rem;
      color: var(--mortar);
      line-height: 1.55;
    }

    /* Permit panel */
    .permit-panel {
      background: var(--blue);
      border-radius: 8px;
      padding: 20px 24px;
      display: flex; align-items: flex-start; gap: 16px;
    }
    .permit-badge {
      background: var(--orange);
      border-radius: 4px;
      padding: 6px 10px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.875rem; font-weight: 700;
      color: white;
      flex-shrink: 0;
    }
    .permit-body { }
    .permit-title {
      font-size: 0.75rem; font-weight: 700;
      letter-spacing: 0.12em; text-transform: uppercase;
      color: rgba(255,255,255,0.4);
      margin-bottom: 4px;
    }
    .permit-detail {
      font-size: 0.9rem;
      color: rgba(255,255,255,0.75);
      line-height: 1.6;
    }
    .permit-timeline {
      margin-top: 6px;
      font-size: 0.8rem;
      color: rgba(255,255,255,0.4);
    }

    /* Site visit note */
    .site-visit-panel {
      border: 1.5px dashed var(--warm);
      border-radius: 8px;
      padding: 20px 24px;
      display: flex; align-items: flex-start; gap: 14px;
    }
    .site-visit-icon {
      width: 36px; height: 36px;
      background: var(--orange);
      border-radius: 4px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .site-visit-icon svg { width: 18px; height: 18px; fill: white; }
    .site-visit-text h4 {
      font-size: 0.875rem; font-weight: 700;
      color: var(--black); margin-bottom: 4px;
    }
    .site-visit-text p {
      font-size: 0.875rem;
      color: var(--mortar); line-height: 1.6;
    }

    /* CTA panel */
    .cta-panel {
      background: var(--black);
      border-radius: 8px;
      padding: 28px;
      display: flex; align-items: center;
      justify-content: space-between; gap: 24px;
      flex-wrap: wrap;
    }
    .cta-text h3 {
      font-family: 'JetBrains Mono', monospace;
      font-size: 1.125rem; font-weight: 700;
      color: white; margin-bottom: 4px;
      letter-spacing: -0.02em;
    }
    .cta-text p {
      font-size: 0.875rem;
      color: rgba(255,255,255,0.45);
    }
    .cta-btn {
      background: var(--orange); color: white;
      border: none; border-radius: 5px;
      padding: 13px 24px;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.875rem; font-weight: 700;
      letter-spacing: 0.08em; text-transform: uppercase;
      cursor: pointer; text-decoration: none;
      transition: background 0.2s; white-space: nowrap;
      display: inline-block;
    }
    .cta-btn:hover { background: var(--orange2); }

    /* New estimate btn */
    .new-estimate-btn {
      background: none;
      border: 1.5px solid var(--warm);
      border-radius: 6px;
      padding: 10px 20px;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.8125rem; font-weight: 600;
      color: var(--mortar);
      cursor: pointer;
      transition: all 0.2s;
      width: 100%;
      margin-top: 8px;
    }
    .new-estimate-btn:hover {
      border-color: var(--orange);
      color: var(--orange);
    }

    /* ── Error state ── */
    .error-panel {
      background: #FFF1F2;
      border: 1px solid #FECDD3;
      border-radius: 8px;
      padding: 20px 24px;
      display: none;
    }
    .error-panel.show { display: block; }
    .error-text {
      font-size: 0.9375rem;
      color: var(--red);
    }

    /* ── Disclaimer ── */
    .disclaimer {
      margin-top: 24px;
      font-size: 0.8rem;
      color: var(--mortar);
      line-height: 1.6;
      text-align: center;
    }

    /* ── Responsive ── */
    @media (max-width: 640px) {
      .email-row { flex-direction: column; }
      .calc-btn { width: 100%; justify-content: center; }
      .estimate-meta { gap: 20px; }
      .cta-panel { flex-direction: column; }
      .cta-btn { width: 100%; text-align: center; }
    }