:root {
    --bg: #f3f6f8;
    --panel: #ffffff;
    --panel-soft: #f8fafc;
    --text: #111827;
    --muted: #667085;
    --border: #d8e0ea;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --action: #f97316;
    --danger: #dc2626;
    --success: #157347;
    --shadow: 0 18px 45px rgba(17, 24, 39, 0.08);
    --radius: 8px;
    --focus: 0 0 0 3px rgba(15, 118, 110, 0.24);
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

html {
    min-height: 100%;
}

body {
    min-height: 100%;
    margin: 0;
    background:
        linear-gradient(180deg, #ffffff 0, rgba(255, 255, 255, 0) 320px),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

button,
input,
textarea,
select {
    font: inherit;
}

button,
a,
input,
textarea,
select {
    outline-offset: 3px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: none;
    box-shadow: var(--focus);
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: 1rem;
    z-index: 20;
    transform: translateY(-140%);
    background: var(--text);
    color: #fff;
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header,
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: clamp(1.25rem, 3vw, 2rem);
    max-width: 1220px;
    margin: 0 auto;
}

.site-header {
    padding-bottom: 1.25rem;
}

.site-header h1,
.admin-header h1,
.auth-card h1,
.section-header h2,
.panel-heading h2 {
    margin: 0;
    line-height: 1.12;
    letter-spacing: 0;
}

.site-header h1 {
    font-size: clamp(2rem, 5vw, 3.4rem);
}

.brand-lockup {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-lockup img {
    width: clamp(56px, 10vw, 92px);
    height: clamp(56px, 10vw, 92px);
    object-fit: contain;
    flex: 0 0 auto;
}

.site-header p,
.panel-heading p {
    max-width: 760px;
    color: var(--muted);
    margin: 0.75rem 0 0;
}

.eyebrow {
    margin: 0 0 0.35rem;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.app-shell {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 1.5rem);
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 3vw, 2rem) 2rem;
}

.estimator-tabs {
    display: grid;
    align-self: start;
    gap: 0.5rem;
}

.estimator-tabs a {
    display: flex;
    min-height: 48px;
    align-items: center;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    text-decoration: none;
    box-shadow: 0 10px 25px rgba(17, 24, 39, 0.04);
    font-weight: 800;
}

.estimator-tabs a.is-active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.estimator-panel,
.admin-section,
.auth-card,
.empty-state,
.cookie-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.estimator-panel,
.admin-section,
.auth-card,
.empty-state {
    padding: clamp(1rem, 3vw, 1.75rem);
}

.panel-heading,
.section-header,
.subsection-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-field {
    display: grid;
    gap: 0.4rem;
    color: var(--text);
    font-weight: 700;
}

.form-field input,
.form-field textarea,
.form-field select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    min-height: 46px;
    padding: 0.78rem 0.9rem;
    font-weight: 500;
}

.form-field input[type="file"] {
    padding: 0.65rem;
}

.input-with-unit {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(150px, 190px);
    gap: 0.5rem;
}

.input-with-unit.compact {
    grid-template-columns: minmax(0, 110px) minmax(90px, 120px);
}

.form-field small {
    color: var(--muted);
    font-weight: 500;
}

.check-field {
    display: flex;
    align-items: center;
    min-height: 48px;
    gap: 0.65rem;
    font-weight: 700;
}

.check-field input {
    width: 1.2rem;
    height: 1.2rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border: 0;
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--primary);
}

.button-primary:hover {
    background: var(--primary-dark);
}

.button-secondary {
    background: #263244;
}

.button-secondary.is-active {
    background: var(--primary);
}

.button-action {
    background: var(--action);
}

.button-danger {
    background: var(--danger);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.result-panel {
    margin-top: 1.25rem;
    padding: 1rem;
    border-radius: var(--radius);
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
}

.result-panel strong {
    display: block;
    font-size: clamp(1.5rem, 4vw, 2.4rem);
    line-height: 1.1;
}

.cost-result {
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px solid #a7f3d0;
    color: var(--text);
    font-weight: 800;
}

.admin-body {
    background: #eef3f9;
}

.admin-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.header-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.75rem;
}

.site-footer {
    max-width: 1220px;
    margin: 0 auto;
    padding: 1.25rem clamp(1.25rem, 3vw, 2rem) 2rem;
    color: var(--muted);
}

.site-footer p {
    margin: 0.45rem 0 0;
}

.footer-actions,
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-bottom: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--text);
    color: #fff;
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 900;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.58);
}

.policy-modal {
    width: min(760px, 100%);
    max-height: min(760px, calc(100vh - 2rem));
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    margin: 0;
}

.modal-content {
    overflow-y: auto;
    padding: 1rem;
    color: var(--text);
    white-space: normal;
}

.has-modal {
    overflow: hidden;
}

.admin-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 0.65rem 0.8rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 800;
}

.admin-main {
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 3vw, 2rem) 2rem;
}

.settings-block {
    display: grid;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #f8fafc;
}

.pricing-panel {
    display: grid;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--panel-soft);
}

.measurement-bar {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto;
    gap: 1rem;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #f7fbfa;
}

.measurement-bar h3,
.planner-panel h3 {
    margin: 0;
}

.measurement-bar p,
.planner-panel p {
    margin: 0.35rem 0 0;
    color: var(--muted);
}

.unit-toggle {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
}

.unit-toggle label {
    cursor: pointer;
}

.unit-toggle input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.unit-toggle span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 52px;
    min-height: 42px;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    font-weight: 900;
}

.unit-toggle input:checked + span {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.unit-toggle input:focus-visible + span {
    box-shadow: var(--focus);
}

.planner-panel {
    display: grid;
    grid-template-columns: minmax(220px, 0.36fr) minmax(0, 0.64fr);
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--panel-soft);
}

.planner-copy {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
}

.planner-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 0.65rem;
}

.planner-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.planner-presets .button,
.planner-toolbar .button {
    min-height: 40px;
    padding: 0.62rem 0.8rem;
}

.planner-scale {
    flex: 1 1 220px;
}

.planner-board {
    min-width: 0;
    display: grid;
    gap: 0.75rem;
}

.planner-board canvas {
    width: 100%;
    aspect-ratio: 13 / 7;
    display: block;
    border: 1px solid #cad6e2;
    border-radius: var(--radius);
    background: #fbfcff;
    cursor: crosshair;
    touch-action: none;
}

.planner-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    align-items: center;
}

.planner-output {
    display: block;
    min-height: 42px;
    padding: 0.65rem 0.75rem;
    border: 1px dashed #b7c5d4;
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    font-weight: 800;
}

.pricing-panel h3 {
    margin: 0;
}

.pricing-panel p {
    margin: 0.35rem 0 0;
    color: var(--muted);
}

.settings-block h3 {
    margin: 0;
}

.settings-block p {
    margin: 0.35rem 0 0;
    color: var(--muted);
}

.logo-preview {
    width: min(220px, 100%);
    max-height: 120px;
    object-fit: contain;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.25rem;
}

.auth-card {
    width: min(100%, 440px);
}

.auth-card form,
.admin-form,
.estimate-form {
    display: grid;
    gap: 1rem;
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-weight: 700;
}

.alert-danger {
    color: #7f1d1d;
    background: #fee2e2;
    border: 1px solid #fecaca;
}

.alert-success {
    color: #14532d;
    background: #dcfce7;
    border: 1px solid #bbf7d0;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

th,
td {
    text-align: left;
    padding: 0.85rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

th {
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0;
}

.table-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.field-list {
    display: grid;
    gap: 1rem;
}

.field-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.field-row legend {
    padding: 0 0.4rem;
    font-weight: 800;
}

.cookie-panel {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 15;
    width: min(420px, calc(100vw - 2rem));
    padding: 1rem;
}

.cookie-panel p {
    margin-top: 0;
}

code {
    background: #eef2ff;
    color: #27327a;
    border-radius: 6px;
    padding: 0.12rem 0.3rem;
}

@media (max-width: 820px) {
    .site-header,
    .admin-header,
    .section-header,
    .panel-heading,
    .subsection-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .brand-lockup {
        align-items: flex-start;
    }

    .header-actions,
    .footer-actions {
        justify-content: flex-start;
    }

    .modal-header {
        align-items: stretch;
        flex-direction: column;
    }

    .app-shell {
        grid-template-columns: 1fr;
    }

    .estimator-tabs {
        display: flex;
        overflow-x: auto;
        padding-bottom: 0.25rem;
        scroll-snap-type: x mandatory;
    }

    .estimator-tabs a {
        min-width: 170px;
        scroll-snap-align: start;
    }

    .field-grid,
    .field-row,
    .measurement-bar,
    .planner-panel,
    .input-with-unit {
        grid-template-columns: 1fr;
    }

    .unit-toggle {
        justify-content: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}