/* ═══════════════════════════════════════════════════════════════════
   Pool Cost Estimator - Main Stylesheet
   Mobile-first responsive design
   ═══════════════════════════════════════════════════════════════════ */

/* ── CSS Variables ───────────────────────────────────────────────── */
:root {
    --primary: #0077B6;
    --primary-dark: #023E8A;
    --primary-light: #90E0EF;
    --primary-bg: #e8f4f8;
    --accent: #00B4D8;
    --success: #06D6A0;
    --success-bg: #e8f8f0;
    --warning: #FFD166;
    --warning-bg: #fff8e6;
    --danger: #EF476F;
    --danger-bg: #fde8ec;
    --info: #00B4D8;
    --info-bg: #e3f6fb;

    --bg: #f5f7fa;
    --bg-card: #ffffff;
    --text: #212529;
    --text-secondary: #6C757D;
    --text-muted: #ADB5BD;
    --border: #dee2e6;
    --border-light: #f0f0f0;

    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);

    --header-height: 56px;
    --sidebar-width: 250px;
    --bottom-nav-height: 64px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; height: auto; }
hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* ── Typography ──────────────────────────────────────────────────── */
h1 { font-size: 1.5rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }

.text-muted { color: var(--text-secondary); font-size: 0.9rem; }

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.625rem 1.25rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn .material-icons-round { font-size: 1.1rem; }

.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-dark); color: white; }

.btn-secondary {
    background: #e9ecef;
    color: var(--text);
}
.btn-secondary:hover { background: #d3d8de; }

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc3060; color: white; }

.btn-danger-text { color: var(--danger) !important; }
.btn-danger-text:hover { background: var(--danger-bg) !important; border-color: var(--danger) !important; }

.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8rem; }
.btn-lg { padding: 0.875rem 1.5rem; font-size: 1rem; }
.btn-block { display: flex; width: 100%; }

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.btn-icon:hover { background: rgba(0,0,0,0.05); color: var(--text); }

.btn-danger-icon:hover { background: var(--danger-bg); color: var(--danger); }

.btn-group-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

/* ── Forms ────────────────────────────────────────────────────────── */
.form-group {
    margin-bottom: 1rem;
    flex: 1;
    min-width: 0;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.form-group label small {
    text-transform: none;
    font-weight: 400;
    letter-spacing: 0;
}

.form-group-grow { flex: 2; }

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="password"],
input[type="date"],
input[type="search"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--text);
    background: white;
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,119,182,0.15);
}

input[readonly] {
    background: #f8f9fa;
    color: var(--text-secondary);
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236C757D' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

textarea { resize: vertical; min-height: 60px; }

.form-row {
    display: flex;
    gap: 0.75rem;
}

.form-row-3 > .form-group { flex: 1; min-width: 100px; }
.form-row-4 > .form-group { flex: 1; min-width: 80px; }

.form-help {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.form-narrow { max-width: 600px; }

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    padding: 1rem 0;
}

.input-with-prefix,
.input-with-suffix {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.input-with-prefix span,
.input-with-suffix span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-with-prefix input,
.input-with-suffix input {
    text-align: right;
}

/* ── Alerts ──────────────────────────────────────────────────────── */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-success { background: var(--success-bg); color: #0a7c5a; border-left: 4px solid var(--success); }
.alert-danger { background: var(--danger-bg); color: #c0334d; border-left: 4px solid var(--danger); }
.alert-warning { background: var(--warning-bg); color: #9a7b1a; border-left: 4px solid var(--warning); }
.alert-info { background: var(--info-bg); color: #007c9a; border-left: 4px solid var(--info); }

/* ── Badges ──────────────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-primary { background: var(--primary-bg); color: var(--primary); }
.badge-secondary { background: #e9ecef; color: var(--text-secondary); }
.badge-success { background: var(--success-bg); color: #0a7c5a; }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: #9a7b1a; }

/* ── App Header ──────────────────────────────────────────────────── */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.header-title {
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-right { display: flex; align-items: center; gap: 0.5rem; }

.header-new-btn .btn-label { display: none; }

/* ── Sidebar ─────────────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background: white;
    z-index: 200;
    transition: left 0.3s ease;
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
}

.sidebar.open { left: 0; }

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo { font-size: 2rem; }
.sidebar-brand {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
}

.sidebar-nav {
    list-style: none;
    padding: 0.5rem 0;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text);
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-nav li a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.sidebar-nav li.active a {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
    border-right: 3px solid var(--primary);
}

.sidebar-nav li a .material-icons-round {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.sidebar-nav li.active a .material-icons-round { color: var(--primary); }

.sidebar-divider {
    border-top: 1px solid var(--border);
    margin: 0.5rem 0;
}

/* ── Bottom Navigation (mobile) ──────────────────────────────────── */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: white;
    border-top: 1px solid var(--border);
    display: flex;
    z-index: 100;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
    text-decoration: none;
}

.bottom-nav-item .material-icons-round { font-size: 1.4rem; }

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item.active .material-icons-round {
    color: var(--primary);
}

/* ── Main Content Area ───────────────────────────────────────────── */
.main-content {
    padding: calc(var(--header-height) + 1rem) 1rem calc(var(--bottom-nav-height) + 1rem);
    max-width: 1200px;
    margin: 0 auto;
}

/* ── Stats Grid ──────────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon .material-icons-round { font-size: 1.4rem; color: white; }
.bg-primary { background: var(--primary); }
.bg-success { background: var(--success); }
.bg-warning { background: var(--warning); }
.bg-info { background: var(--info); }

.stat-info { min-width: 0; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 700; line-height: 1.2; }
.stat-label { display: block; font-size: 0.7rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.3px; }

/* ── Section Headers ─────────────────────────────────────────────── */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

.section-header h2 { font-size: 1.1rem; }

/* ── Quick Actions ───────────────────────────────────────────────── */
.quick-actions {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    min-width: 100px;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--text);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.quick-action-btn .material-icons-round { font-size: 1.5rem; color: var(--primary); }
.quick-action-btn:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); color: var(--text); }

/* ── Search Bar ──────────────────────────────────────────────────── */
.search-bar {
    margin-bottom: 1rem;
}

.search-form {
    display: flex;
    gap: 0.5rem;
    align-items: stretch;
}

.search-input-group {
    flex: 1;
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 0.75rem;
    transition: border-color 0.2s;
}

.search-input-group:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,119,182,0.15);
}

.search-input-group .material-icons-round { color: var(--text-muted); font-size: 1.2rem; }

.search-input-group input {
    border: none;
    padding: 0.625rem 0.5rem;
    flex: 1;
    background: transparent;
}

.search-input-group input:focus { outline: none; box-shadow: none; }

.search-clear {
    font-size: 1.2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0 0.25rem;
}

.search-form select {
    width: auto;
    min-width: 120px;
}

/* ── Estimate List (cards) ───────────────────────────────────────── */
.estimate-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.estimate-card {
    display: block;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s;
    border-left: 4px solid transparent;
}

.estimate-card:hover {
    box-shadow: var(--shadow-md);
    border-left-color: var(--primary);
    color: var(--text);
}

.estimate-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.estimate-number { font-weight: 700; font-size: 0.95rem; }

.estimate-card-body { margin-bottom: 0.5rem; }

.estimate-client {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.estimate-client .material-icons-round { font-size: 1rem; color: var(--text-secondary); }

.estimate-details {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.estimate-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.estimate-date { font-size: 0.8rem; color: var(--text-secondary); }
.estimate-total { font-size: 1.1rem; font-weight: 700; color: var(--primary); }

/* ── Client List ─────────────────────────────────────────────────── */
.client-list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.client-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s;
}

.client-card:hover { box-shadow: var(--shadow-md); color: var(--text); }

.client-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.client-info { flex: 1; min-width: 0; }
.client-name { font-weight: 600; font-size: 0.95rem; }
.client-detail {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.125rem;
}

.client-detail span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.client-detail .material-icons-round { font-size: 0.9rem; }
.client-arrow { color: var(--text-muted); }

/* ── Detail Grid ─────────────────────────────────────────────────── */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.detail-label { font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.3px; }
.detail-value { font-size: 0.95rem; margin-top: 0.125rem; }
.detail-value a { color: var(--primary); }

/* ── Breadcrumb ──────────────────────────────────────────────────── */
.breadcrumb {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a::after { content: ' /'; color: var(--text-muted); }

/* ── Form Cards ──────────────────────────────────────────────────── */
.form-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
    overflow: hidden;
}

.form-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    cursor: pointer;
    user-select: none;
    border-bottom: 1px solid var(--border-light);
    transition: background 0.2s;
}

.form-card-header:hover { background: #fafafa; }

.form-card-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.form-card-header h3 .material-icons-round { color: var(--primary); font-size: 1.25rem; }

.section-toggle {
    color: var(--text-muted);
    transition: transform 0.3s;
}

.form-card.collapsed .form-card-body { display: none; }
.form-card.collapsed .section-toggle { transform: rotate(180deg); }

.form-card-body { padding: 1rem; }

/* ── Estimate Form Layout ────────────────────────────────────────── */
.form-layout {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.form-main { flex: 1; }

.form-sidebar {
    margin-top: 1rem;
}

/* ── Summary Card ────────────────────────────────────────────────── */
.summary-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
}

.summary-card h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--primary);
}

.summary-items {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 0.75rem;
}

.summary-empty {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 1rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.375rem 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-light);
}

.summary-item:last-child { border-bottom: none; }
.summary-item-label { flex: 1; color: var(--text-secondary); padding-right: 0.5rem; }
.summary-item-value { font-weight: 600; white-space: nowrap; }

.summary-category {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary);
    padding: 0.5rem 0 0.25rem;
    letter-spacing: 0.3px;
}

.summary-totals {
    border-top: 2px solid var(--border);
    padding-top: 0.75rem;
}

.summary-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.375rem 0;
    font-size: 0.9rem;
}

.summary-line-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    cursor: default;
}

.summary-total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    border-top: 2px solid var(--text);
    margin-top: 0.25rem;
    padding-top: 0.5rem;
}

.summary-actions {
    margin-top: 1rem;
}

.summary-actions .btn { margin-bottom: 0.5rem; }

/* ── Pool Metrics ────────────────────────────────────────────────── */
.pool-metrics {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.75rem;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
    margin-top: 0.75rem;
}

.metric {
    font-size: 0.85rem;
}

.metric-label {
    font-weight: 600;
    color: var(--primary);
}

/* ── Toggle Switches ─────────────────────────────────────────────── */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
}

.feature-item {
    padding: 0.5rem;
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.toggle-switch input { display: none; }

.toggle-slider {
    width: 44px;
    height: 24px;
    background: #d1d5db;
    border-radius: 12px;
    position: relative;
    transition: background 0.3s;
    flex-shrink: 0;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.9rem;
    font-weight: 500;
}

.feature-options {
    margin-top: 0.5rem;
    padding-left: 0;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-0.5rem); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Custom Items ────────────────────────────────────────────────── */
.custom-item-row {
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background: #fafafa;
    border-radius: var(--radius-sm);
}

.custom-item-row .form-row {
    align-items: flex-end;
}

.custom-item-row input { font-size: 0.85rem; padding: 0.5rem; }

/* ── Mobile Summary Bar ──────────────────────────────────────────── */
.mobile-summary-bar {
    display: flex;
    position: fixed;
    bottom: var(--bottom-nav-height);
    left: 0;
    right: 0;
    background: white;
    border-top: 2px solid var(--primary);
    padding: 0.625rem 1rem;
    align-items: center;
    justify-content: space-between;
    z-index: 90;
    box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
}

.mobile-summary-total {
    font-size: 1.1rem;
    font-weight: 700;
}

.mobile-summary-total span:first-child {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-right: 0.25rem;
}

/* ── Tabs ────────────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: 0;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

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

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: var(--primary-bg);
}

.tab .material-icons-round { font-size: 1.1rem; }

/* ── Pricing Table ───────────────────────────────────────────────── */
.pricing-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--border-light);
    gap: 0.75rem;
}

.pricing-row:last-child { border-bottom: none; }

.pricing-info { flex: 1; min-width: 0; }
.pricing-label { font-size: 0.9rem; font-weight: 500; display: block; }
.pricing-desc { font-size: 0.75rem; color: var(--text-muted); display: block; }

.pricing-input {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    flex-shrink: 0;
}

.pricing-input input {
    width: 90px;
    text-align: right;
    padding: 0.375rem 0.5rem;
    font-size: 0.9rem;
}

.pricing-unit {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 35px;
}

/* ── Autocomplete ────────────────────────────────────────────────── */
.autocomplete-wrapper { position: relative; }

.autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1.5px solid var(--primary);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    max-height: 200px;
    overflow-y: auto;
    z-index: 50;
    display: none;
    box-shadow: var(--shadow-lg);
}

.autocomplete-results.show { display: block; }

.autocomplete-item {
    padding: 0.625rem 0.875rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-light);
    transition: background 0.15s;
}

.autocomplete-item:hover { background: var(--primary-bg); }
.autocomplete-item:last-child { border-bottom: none; }
.autocomplete-item .ac-name { font-weight: 600; font-size: 0.9rem; }
.autocomplete-item .ac-detail { font-size: 0.75rem; color: var(--text-secondary); }

/* ── Toast Notifications ─────────────────────────────────────────── */
#toast-container {
    position: fixed;
    top: calc(var(--header-height) + 0.5rem);
    right: 0.5rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: white;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    max-width: 350px;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: #e6a817; }
.toast-info { background: var(--primary); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* ── Confirm Modal ───────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    padding: 1rem;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-dialog {
    background: white;
    border-radius: var(--radius);
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-header {
    padding: 1.25rem 1.25rem 0;
}

.modal-header h3 { font-size: 1.1rem; }

.modal-body {
    padding: 1rem 1.25rem;
    color: var(--text-secondary);
}

.modal-footer {
    padding: 0 1.25rem 1.25rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* ── Pool Shape Preview ──────────────────────────────────────────── */
.shape-preview-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    color: var(--primary);
    text-decoration: none;
    margin-top: 6px;
}

.shape-preview-link:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

.shape-preview-link .material-icons-round {
    font-size: 1rem;
}

.shape-preview-dialog {
    max-width: 580px;
    width: 92%;
}

.shape-preview-dialog .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.75rem;
}

.shape-preview-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    padding: 2px;
    line-height: 1;
    display: flex;
    align-items: center;
}

.shape-preview-close:hover {
    color: var(--text);
    background: var(--border-light);
}

.shape-preview-img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

/* ── Empty State ─────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state .material-icons-round {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.empty-state h3 { color: var(--text); margin-bottom: 0.5rem; }
.empty-state p { margin-bottom: 1rem; font-size: 0.9rem; }

/* ── Pagination ──────────────────────────────────────────────────── */
.pagination {
    display: flex;
    gap: 0.375rem;
    justify-content: center;
    padding: 1rem 0;
    flex-wrap: wrap;
}

/* ── Install Page ────────────────────────────────────────────────── */
.install-progress {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
}

.progress-step {
    flex: 1;
    text-align: center;
    padding: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 3px solid var(--border);
}

.progress-step.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.progress-step.done {
    color: var(--success);
    border-bottom-color: var(--success);
}

.install-step h3 { margin-bottom: 0.75rem; }

.code-block {
    background: #f8f9fa;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    margin-bottom: 1rem;
}

.code-block pre {
    font-family: monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
}

/* ── Login Page ──────────────────────────────────────────────────── */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #023E8A 0%, #0077B6 50%, #00B4D8 100%);
    padding: 1rem;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-logo {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.5rem;
}

.login-header h1 {
    font-size: 1.3rem;
    color: var(--primary-dark);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.pin-input-group {
    margin-bottom: 1.25rem;
}

.pin-input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-align: center;
}

.pin-input-group input {
    text-align: center;
    font-size: 1.5rem;
    letter-spacing: 0.5rem;
    padding: 0.875rem;
}

.login-footer {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
}

.login-form { margin-top: 1rem; }

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ═══════════════════════════════════════════════════════════════════ */

/* ── Tablet (768px+) ─────────────────────────────────────────────── */
@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .header-new-btn .btn-label { display: inline; }

    .form-layout {
        flex-direction: row;
        gap: 1.5rem;
    }

    .form-main { flex: 1; min-width: 0; }

    .form-sidebar {
        width: 320px;
        flex-shrink: 0;
        margin-top: 0;
    }

    .sticky {
        position: sticky;
        top: calc(var(--header-height) + 1rem);
    }

    .mobile-summary-bar { display: none; }

    .main-content {
        padding-bottom: calc(var(--bottom-nav-height) + 1.5rem);
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Desktop (1024px+) ───────────────────────────────────────────── */
@media (min-width: 1024px) {
    .sidebar {
        left: 0;
        top: var(--header-height);
        width: var(--sidebar-width);
        height: calc(100% - var(--header-height));
        box-shadow: var(--shadow);
        border-right: 1px solid var(--border);
    }

    .sidebar-overlay { display: none !important; }

    .menu-toggle { display: none; }

    .bottom-nav { display: none; }

    .main-content {
        margin-left: var(--sidebar-width);
        padding-bottom: 2rem;
    }

    .mobile-summary-bar { display: none; }

    .form-sidebar { width: 350px; }

    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ── Small phones ────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .form-row-4 {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .form-row-4 > .form-group {
        flex: 1 1 45%;
    }

    .search-form {
        flex-direction: column;
    }

    .search-form select {
        width: 100%;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .pricing-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .pricing-input {
        width: 100%;
        justify-content: flex-end;
    }

    .custom-item-row .form-row {
        flex-wrap: wrap;
    }

    .btn-group-row {
        flex-direction: column;
    }

    .btn-group-row .btn {
        width: 100%;
        justify-content: center;
    }

    .tabs { overflow-x: auto; }

    .tab {
        min-width: 80px;
        font-size: 0.7rem;
        padding: 0.625rem 0.5rem;
    }

    .tab .material-icons-round { font-size: 1rem; }
}

/* ── Print Styles ────────────────────────────────────────────────── */
@media print {
    .app-header,
    .sidebar,
    .sidebar-overlay,
    .bottom-nav,
    .mobile-summary-bar,
    #toast-container,
    .modal-overlay {
        display: none !important;
    }

    .main-content {
        margin: 0;
        padding: 0;
    }

    body { background: white; }
}