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

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #10b981;
    --warning: #f59e0b;
    --info: #3b82f6;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* ===== Header & Navigation ===== */
.app-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
    height: 56px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.app-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
}

.main-nav {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 16px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all .2s;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text);
    text-decoration: none;
}

.nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-name {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Bottom nav hidden by default (shown via media query) */
.bottom-nav { display: none; }

/* ===== Layout ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.mb { margin-bottom: 20px; }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

/* ===== Card ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card h4 {
    font-size: 14px;
    margin-bottom: 8px;
}

/* ===== Login ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,.15);
    text-align: center;
}

.login-card h1 { font-size: 28px; margin-bottom: 4px; color: var(--primary); }
.login-subtitle { color: var(--text-secondary); margin-bottom: 30px; font-size: 14px; }
.login-hint { margin-top: 20px; font-size: 12px; color: var(--text-secondary); }

/* ===== Stats Cards ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow);
}

.stat-card.mini { padding: 12px 16px; }

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
}

.stat-card .stat-value.text-sm { font-size: 18px; }

.stat-card .stat-value .currency {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
}

.stat-card .stat-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* ===== Charts ===== */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.chart-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chart-card canvas { max-height: 300px; }

.period-selector { display: flex; gap: 4px; }

.period-btn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: transparent;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all .2s;
}

.period-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color .2s;
    background: #fff;
    color: var(--text);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.1);
}

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

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.form-grid-4 { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.form-grid-6 { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.form-grid-2 .form-group,
.form-grid-3 .form-group,
.form-grid-4 .form-group,
.form-grid-6 .form-group { margin-bottom: 0; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.error-msg {
    background: #fef2f2;
    color: var(--danger);
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 12px;
}

.success-msg {
    background: #ecfdf5;
    color: var(--success);
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 12px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s;
    line-height: 1.4;
    white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.6;
}

.badge-success { background: #ecfdf5; color: var(--success); }
.badge-danger { background: #fef2f2; color: var(--danger); }
.badge-info { background: #eff6ff; color: var(--info); }
.badge-muted { background: var(--bg); color: var(--text-secondary); }

/* ===== Category Tree ===== */
.cat-tree {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 6px;
    margin-bottom: 16px;
}

.cat-node {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: border-color .2s;
}

.cat-node:hover { border-color: var(--primary); }

.cat-parent {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--bg);
    user-select: none;
}

.cat-arrow {
    font-size: 10px;
    color: var(--text-secondary);
    transition: transform .2s;
    width: 14px;
    text-align: center;
    flex-shrink: 0;
}

.cat-node.open .cat-arrow { transform: rotate(90deg); }

.cat-parent-name {
    font-size: 13px;
    font-weight: 500;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cat-count {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--card-bg);
    border-radius: 10px;
    padding: 0 6px;
    line-height: 1.6;
    flex-shrink: 0;
}

.cat-sub-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
    background: var(--card-bg);
}

.cat-node.open .cat-sub-list { max-height: 500px; }

.cat-child {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px 6px 32px;
    border-top: 1px solid var(--border);
    font-size: 13px;
}

.cat-child-name { color: var(--text); }

.cat-del {
    width: 22px;
    height: 22px;
    border: none;
    background: transparent;
    color: var(--danger);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity .2s, background .2s;
}

.cat-child:hover .cat-del { opacity: 1; }
.cat-del:hover { background: #fef2f2; }

.cat-add-bar {
    display: flex;
    gap: 8px;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.cat-add-bar select { max-width: 180px; }
.cat-add-bar input { max-width: 200px; }

/* ===== Filter Bar ===== */
.filter-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-bar .form-group {
    margin-bottom: 0;
    min-width: 120px;
    flex: 1;
    max-width: 200px;
}

.filter-bar input, .filter-bar select { padding: 6px 10px; font-size: 13px; }

/* ===== Tables ===== */
.expense-table-wrap { overflow-x: auto; }

.expense-table {
    width: 100%;
    border-collapse: collapse;
}

.expense-table th {
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 10px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.expense-table td {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

.expense-table tr:hover { background: #f8fafc; }
.expense-table tr:last-child td { border-bottom: none; }

.expense-table .amount {
    font-weight: 600;
    color: var(--danger);
    white-space: nowrap;
}

.expense-table .actions { white-space: nowrap; }
.expense-table .actions .btn { margin-right: 4px; }

.table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0 0;
    border-top: 2px solid var(--border);
    margin-top: 4px;
}

.table-footer .total-label { font-size: 14px; color: var(--text-secondary); }
.table-footer .total-amount { font-size: 16px; font-weight: 700; color: var(--danger); }

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ===== Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 480px;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
    max-height: 90vh;
    overflow-y: auto;
}

.modal h3 { font-size: 18px; margin-bottom: 16px; }

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 16px;
}

/* ===== Competitor Analysis ===== */

/* Tab Navigation */
.comp-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.comp-tab {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    color: var(--text-secondary);
    transition: all .2s;
}

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

.comp-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    font-weight: 500;
}

/* Tab Panels */
.comp-panel { display: none; }
.comp-panel.active { display: block; }

/* Feature Matrix Table */
.comp-matrix th {
    text-align: center;
    min-width: 90px;
    vertical-align: bottom;
    padding-bottom: 10px;
}

.comp-matrix .sticky-col {
    position: sticky;
    left: 0;
    background: var(--card-bg);
    z-index: 2;
    min-width: 120px;
    text-align: left;
}

.comp-matrix thead .sticky-col { z-index: 3; }

.matrix-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.matrix-site {
    font-size: 11px;
    color: var(--primary);
}

.matrix-size {
    font-size: 11px;
    color: var(--text-secondary);
}

.feature-name {
    font-size: 13px;
    font-weight: 500;
}

.check-cell {
    text-align: center;
    font-size: 16px;
    font-weight: 600;
}

.check-yes { color: var(--success); }
.check-no { color: var(--danger); opacity: .6; }
.check-empty { color: var(--border); }

.actions-row td { border-bottom: none; padding-top: 12px; }

/* Detail Cards Grid */
.comp-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(440px, 1fr));
    gap: 16px;
}

.comp-detail-card { overflow: hidden; }

.comp-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.comp-detail-header h3 {
    margin-bottom: 0;
    font-size: 17px;
}

.comp-detail-list { display: flex; flex-direction: column; gap: 0; }

.comp-detail-item {
    display: flex;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    line-height: 1.5;
}

.comp-detail-item:last-child { border-bottom: none; }

.comp-detail-key {
    flex-shrink: 0;
    width: 100px;
    font-weight: 600;
    color: var(--text);
}

.comp-detail-val {
    color: var(--text-secondary);
    word-break: break-word;
}

.comp-detail-notes {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed var(--border);
    font-size: 13px;
    color: var(--warning);
}

/* Summary Section */
.summary-list {
    list-style: none;
    padding: 0;
}

.summary-list li {
    position: relative;
    padding: 8px 0 8px 20px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.summary-list li:last-child { border-bottom: none; }

.summary-list li::before {
    content: '•';
    position: absolute;
    left: 4px;
    color: var(--primary);
    font-weight: bold;
}

/* ===== Utility ===== */
.text-muted { color: var(--text-secondary); }
.text-sm { font-size: 13px; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

/* ===== Responsive: Tablet ===== */
@media (max-width: 900px) {
    .main-nav { gap: 0; }
    .nav-link { padding: 16px 8px; font-size: 13px; }
    .charts-grid { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .comp-detail-grid { grid-template-columns: 1fr; }
    .cat-tree { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}

/* ===== Responsive: Mobile H5 ===== */
@media (max-width: 640px) {
    /* -- Body padding for bottom nav -- */
    body { padding-bottom: calc(60px + env(safe-area-inset-bottom, 0px)); }

    /* -- Header: compact top bar -- */
    .app-header {
        padding: 0 12px;
        height: 48px;
        justify-content: space-between;
    }
    .header-left { gap: 0; }
    .app-logo { font-size: 16px; }

    /* -- Hide top nav, show bottom nav -- */
    .main-nav { display: none; }

    .bottom-nav {
        display: flex !important;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-top: 1px solid var(--border);
        box-shadow: 0 -2px 8px rgba(0,0,0,.08);
        z-index: 200;
        height: calc(56px + env(safe-area-inset-bottom, 0px));
        padding: 0 0 env(safe-area-inset-bottom, 0px) 0;
        justify-content: space-around;
        align-items: stretch;
    }

    .bottom-nav .nav-tab {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        flex: 1;
        text-decoration: none;
        color: var(--text-secondary);
        font-size: 10px;
        padding: 6px 0;
        border: none;
        background: none;
        transition: color .2s;
        -webkit-tap-highlight-color: transparent;
    }

    .bottom-nav .nav-tab .nav-icon {
        font-size: 20px;
        line-height: 1;
    }

    .bottom-nav .nav-tab.active {
        color: var(--primary);
        font-weight: 600;
    }

    .bottom-nav .nav-tab:active { opacity: .7; }

    /* -- Container -- */
    .container { padding: 12px; }

    /* -- Cards -- */
    .card { padding: 14px; border-radius: 10px; }
    .card h3 { font-size: 15px; margin-bottom: 12px; }

    /* -- Stats grid -- */
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .stat-card { padding: 12px 14px; }
    .stat-card .stat-value { font-size: 20px; }
    .stat-card .stat-value.text-sm { font-size: 16px; }

    /* -- Forms: single column, larger touch targets -- */
    .form-grid-2, .form-grid-3, .form-grid-4, .form-grid-6 { grid-template-columns: 1fr; gap: 10px; }
    .form-row { grid-template-columns: 1fr; gap: 10px; }

    input[type="text"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    input[type="url"],
    select,
    textarea {
        padding: 10px 12px;
        font-size: 16px; /* prevents iOS zoom on focus */
        border-radius: 8px;
    }

    .form-group label { font-size: 13px; margin-bottom: 4px; }

    /* -- Buttons: larger for touch -- */
    .btn { padding: 10px 18px; font-size: 15px; border-radius: 8px; min-height: 42px; }
    .btn-sm { padding: 8px 14px; font-size: 14px; min-height: 36px; }

    /* -- Filter bar -- */
    .filter-bar {
        flex-direction: column;
        gap: 8px;
    }
    .filter-bar .form-group { min-width: 100%; max-width: 100%; }

    /* -- Tables: card-based mobile layout -- */
    .expense-table-wrap { overflow-x: visible; }

    .expense-table thead { display: none; }

    .expense-table tbody tr {
        display: block;
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: 10px;
        padding: 12px;
        margin-bottom: 8px;
        position: relative;
    }

    .expense-table tbody tr:hover { background: var(--card-bg); }
    .expense-table tbody tr:last-child td { border-bottom: none; }

    .expense-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 4px 0;
        border-bottom: none;
        font-size: 14px;
    }

    .expense-table td::before {
        content: attr(data-label);
        font-size: 12px;
        color: var(--text-secondary);
        font-weight: 500;
        flex-shrink: 0;
        margin-right: 12px;
    }

    .expense-table td.actions {
        justify-content: flex-end;
        padding-top: 8px;
        margin-top: 4px;
        border-top: 1px solid var(--border);
    }

    .expense-table td.actions::before { display: none; }

    .table-footer {
        padding: 10px 0 0;
        font-size: 14px;
    }
    .table-footer .total-amount { font-size: 15px; }

    /* -- Category tree: full width on mobile -- */
    .cat-tree { grid-template-columns: 1fr; }

    .cat-add-bar {
        flex-wrap: wrap;
    }
    .cat-add-bar select,
    .cat-add-bar input { max-width: 100%; flex: 1; min-width: 0; }

    .cat-del { opacity: 1; } /* always show delete on touch */

    /* -- Charts -- */
    .charts-grid { grid-template-columns: 1fr; gap: 12px; }
    .chart-card canvas { max-height: 250px; }

    /* -- Period selector -- */
    .period-selector { gap: 2px; }
    .period-btn { padding: 6px 10px; font-size: 12px; }

    /* -- Modal -- */
    .modal-overlay.show { align-items: flex-end; }
    .modal {
        width: 100%;
        max-width: 100%;
        border-radius: 16px 16px 0 0;
        padding: 20px 16px;
        max-height: 85vh;
        animation: slideUp .3s ease;
    }
    @keyframes slideUp {
        from { transform: translateY(100%); }
        to { transform: translateY(0); }
    }

    /* -- Competitor analysis -- */
    .comp-tabs { gap: 4px; }
    .comp-tab { padding: 8px 12px; font-size: 13px; }
    .comp-detail-grid { grid-template-columns: 1fr; gap: 12px; }
    .comp-detail-item { flex-direction: column; gap: 4px; }
    .comp-detail-key { width: auto; }
    .comp-matrix th { min-width: 70px; }
    .comp-matrix .sticky-col { min-width: 90px; font-size: 12px; }

    /* -- Header actions -- */
    .header-actions { gap: 8px; }
    .user-name { font-size: 12px; }

    /* -- Empty state -- */
    .empty-state { padding: 30px 16px; }

    /* -- Grid layouts -- */
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}