@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&family=Fira+Sans:wght@400;500;600;700&display=swap');

:root {
    --color-primary:     #0F172A;
    --color-on-primary:  #FFFFFF;
    --color-secondary:   #334155;
    --color-accent:      #0369A1;
    --color-accent-dark: #075985;
    --color-background:  #F8FAFC;
    --color-foreground:  #020617;
    --color-muted:       #E8ECF1;
    --color-surface:     #FFFFFF;
    --color-border:      #E2E8F0;
    --color-destructive: #DC2626;
    --color-destructive-bg: #FEF2F2;
    --color-success:     #065F46;
    --color-ring:        #0369A1;

    --font-ui:   'Fira Sans', system-ui, sans-serif;
    --font-mono: 'Fira Code', ui-monospace, monospace;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    --radius: 8px;
    --radius-sm: 6px;
    --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 6px rgba(15, 23, 42, 0.06);
    --transition: 180ms ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-ui);
    background: var(--color-background);
    color: var(--color-foreground);
}

/* Focus visibility for keyboard nav */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--color-ring);
    outline-offset: 2px;
}

header {
    background: var(--color-primary);
    padding: var(--space-4) var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header h1 { font-size: 1.0625rem; font-weight: 600; color: var(--color-on-primary); letter-spacing: 0.01em; }

.btn { padding: 0.5rem 1rem; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.875rem; font-family: inherit; font-weight: 500; transition: background var(--transition), border-color var(--transition), color var(--transition); }
.btn-primary { background: var(--color-accent); color: white; border: none; }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-outline { background: none; border: 1px solid rgba(255,255,255,0.35); color: var(--color-on-primary); }
.btn-outline:hover { background: rgba(255,255,255,0.1); }

/* Cennik klienta */
.pricing-client-picker {
    display: flex;
    align-items: flex-end;
    gap: var(--space-6);
    flex-wrap: wrap;
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}
.pricing-client-select-field { max-width: 340px; flex: 1 1 260px; margin-bottom: 0; }

.pricing-client-info {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    flex-wrap: wrap;
    padding: 0.75rem var(--space-6);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    min-height: 62px;
}
.pricing-client-info-item { display: flex; flex-direction: column; gap: 0.2rem; padding-right: var(--space-6); border-right: 1px solid var(--color-border); }
.pricing-client-info-item:last-child { padding-right: 0; border-right: none; }
.pricing-client-info-label { font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-secondary); white-space: nowrap; }
.pricing-client-info-item span:last-child { font-size: 0.875rem; font-weight: 500; color: var(--color-primary); font-family: var(--font-mono); white-space: nowrap; }

.copy-prices-card {
    display: flex;
    align-items: flex-end;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-6);
    margin-bottom: var(--space-6);
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    border-radius: var(--radius);
}
.copy-prices-icon { width: 20px; height: 20px; stroke: var(--color-accent); flex-shrink: 0; margin-bottom: 0.6rem; }
.copy-prices-select-field { max-width: 300px; flex: 1 1 220px; margin-bottom: 0; }
.copy-prices-select-field label { color: var(--color-accent-dark); }
.copy-prices-card select { background: var(--color-surface); }

.pricing-table-heading { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-secondary); margin-bottom: var(--space-3); }

@media (max-width: 640px) {
    .pricing-client-picker { align-items: stretch; }
    .pricing-client-info { height: auto; flex-direction: column; align-items: flex-start; gap: var(--space-3); }
    .pricing-client-info-item { border-right: none; padding-right: 0; }
    .copy-prices-card { flex-direction: column; align-items: stretch; }
    .copy-prices-icon { display: none; }
}

/* Search bar */
.search-bar { display: flex; align-items: center; gap: 0.75rem; margin-bottom: var(--space-3); flex-wrap: wrap; }
.search-bar input { width: 100%; max-width: 360px; padding: 0.6rem 0.875rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.9375rem; font-family: inherit; outline: none; background: var(--color-surface); transition: border-color var(--transition), box-shadow var(--transition); }
.search-bar input:focus { border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15); }

.btn-filter-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 0.875rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn-filter-toggle:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-filter-toggle.active { background: var(--color-accent); border-color: var(--color-accent); color: white; font-weight: 600; }

/* Section header (title + primary action) */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-4); }
.section-header h2 { margin-bottom: 0; }

/* Tabs / nav */
.tabs {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-1);
    padding: 0 var(--space-8);
}
.tab-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-secondary);
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}
.tab-btn svg { width: 16px; height: 16px; stroke: currentColor; flex-shrink: 0; }
.tab-btn:hover { color: var(--color-accent); }
.tab-btn.active { color: var(--color-accent); border-bottom-color: var(--color-accent); font-weight: 600; }

main { max-width: 1200px; margin: var(--space-8) auto; padding: 0 var(--space-4); }

.section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}
h2 { font-size: 0.9375rem; font-weight: 600; margin-bottom: var(--space-4); color: var(--color-primary); }
h3 { font-weight: 600; color: var(--color-secondary); }

/* Empty state (used by pages with no content yet) */
.empty-state { padding: var(--space-8) var(--space-4); text-align: center; color: var(--color-secondary); font-size: 0.875rem; }

table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th {
    text-align: left;
    padding: var(--space-2) var(--space-3);
    color: var(--color-secondary);
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
td { padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--color-muted); }
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: var(--color-background); }
tr:last-child td { border-bottom: none; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); }
.field label { display: block; font-size: 0.8125rem; font-weight: 500; color: var(--color-secondary); margin-bottom: 0.375rem; }
.field input, .field select {
    width: 100%;
    padding: 0.5rem 0.625rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--color-foreground);
    background: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus, .field select:focus, .field textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15);
}
.form-actions { margin-top: var(--space-4); display: flex; gap: 0.75rem; align-items: center; }
.msg { font-size: 0.875rem; }
.msg-ok  { color: var(--color-success); }
.msg-err { color: var(--color-destructive); }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--color-background); }
.login-card { background: var(--color-surface); padding: 2rem; border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow-card); width: 320px; }
.login-card h1 { margin-bottom: 1.5rem; font-size: 1.125rem; font-weight: 600; color: var(--color-primary); }
.login-card input { width: 100%; padding: 0.625rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 1rem; font-family: inherit; margin-bottom: 1rem; }
.login-card input:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15); }
.login-card button { width: 100%; padding: 0.75rem; background: var(--color-accent); color: white; border: none; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 500; font-family: inherit; cursor: pointer; transition: background var(--transition); }
.login-card button:hover { background: var(--color-accent-dark); }
.login-error { color: var(--color-destructive); font-size: 0.875rem; margin-top: 0.5rem; display: none; }

code { font-family: var(--font-mono); background: var(--color-muted); color: var(--color-primary); padding: 0.125rem 0.375rem; border-radius: 4px; font-size: 0.8125rem; }

.actions-cell { display: flex; gap: 0.5rem; white-space: nowrap; }
.btn-edit { padding: 0.3rem 0.75rem; font-size: 0.8125rem; font-family: inherit; background: none; border: 1px solid var(--color-accent); color: var(--color-accent); border-radius: var(--radius-sm); cursor: pointer; white-space: nowrap; transition: background var(--transition); }
.btn-edit:hover { background: #EFF6FF; }
.btn-edit:disabled { opacity: 0.4; cursor: not-allowed; background: none; }
.btn-del { padding: 0.3rem 0.75rem; font-size: 0.8125rem; font-family: inherit; background: none; border: 1px solid var(--color-destructive); color: var(--color-destructive); border-radius: var(--radius-sm); cursor: pointer; white-space: nowrap; transition: background var(--transition); }
.btn-del:hover { background: var(--color-destructive-bg); }

.btn-save-row { padding: 0.3rem 0.75rem; font-size: 0.8125rem; font-family: inherit; background: var(--color-accent); color: white; border: none; border-radius: var(--radius-sm); cursor: pointer; margin-left: 0.375rem; transition: background var(--transition); }
.btn-save-row:hover:not(:disabled) { background: var(--color-accent-dark); }
.btn-save-row:disabled { background: var(--color-muted); color: #94A3B8; cursor: not-allowed; }

.badge-info {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    background: #EFF6FF;
    color: var(--color-accent-dark);
    border: 1px solid #BFDBFE;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    white-space: nowrap;
}

.btn-cancel { padding: 0.5rem 1rem; background: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.875rem; font-family: inherit; font-weight: 500; color: var(--color-secondary); cursor: pointer; transition: background var(--transition); }
.btn-cancel:hover { background: var(--color-background); }

/* Modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(2, 6, 23, 0.5); z-index: 100; align-items: center; justify-content: center; padding: var(--space-4); }
.modal-overlay.active { display: flex; }
.modal { background: var(--color-surface); border-radius: var(--radius); width: 100%; max-width: 480px; max-height: 90vh; box-shadow: 0 8px 32px rgba(2, 6, 23, 0.25); overflow: hidden; display: flex; flex-direction: column; }
.modal-lg { max-width: 760px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-border); }
.modal-title { font-size: 0.9375rem; font-weight: 600; color: var(--color-primary); }
.modal-close { background: none; border: none; font-size: 1.4rem; color: #94A3B8; cursor: pointer; line-height: 1; padding: 0.25rem 0.5rem; min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center; transition: color var(--transition); }
.modal-close:hover { color: var(--color-secondary); }
.modal-body { padding: var(--space-6); overflow-y: auto; }
.modal-footer { padding: var(--space-4) var(--space-6); display: flex; gap: 0.75rem; align-items: center; border-top: 1px solid var(--color-border); }

@media (max-width: 640px) {
    .modal { max-width: 100%; }
    .modal-header, .modal-body, .modal-footer { padding-left: var(--space-4); padding-right: var(--space-4); }
    .modal-footer { flex-wrap: wrap; }
}

/* Toggle switch (visibility) */
.switch { position: relative; display: inline-block; width: 40px; height: 22px; vertical-align: middle; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .slider { position: absolute; inset: 0; background-color: #CBD5E1; border-radius: 999px; cursor: pointer; transition: background-color var(--transition); }
.switch .slider::before { content: ""; position: absolute; height: 16px; width: 16px; left: 3px; bottom: 3px; background-color: white; border-radius: 50%; box-shadow: 0 1px 2px rgba(0,0,0,0.25); transition: transform var(--transition); }
.switch input:checked + .slider { background-color: var(--color-accent); }
.switch input:checked + .slider::before { transform: translateX(18px); }
.switch input:disabled + .slider { opacity: 0.6; cursor: not-allowed; }
.switch input:focus-visible + .slider { outline: 2px solid var(--color-ring); outline-offset: 2px; }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-top: var(--space-4); flex-wrap: wrap; }
.pagination-info { font-size: 0.8125rem; color: var(--color-secondary); }
.pagination-controls { display: flex; align-items: center; gap: 0.25rem; }
.page-btn {
    min-width: 32px;
    height: 32px;
    padding: 0 0.5rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.page-btn:hover:not(:disabled) { border-color: var(--color-accent); color: var(--color-accent); }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.page-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: white; font-weight: 600; }
.page-ellipsis { padding: 0 0.25rem; color: var(--color-secondary); font-size: 0.8125rem; }

@media (max-width: 640px) {
    .pagination { justify-content: center; }
}

.field input:disabled { background: var(--color-background); color: #94A3B8; cursor: not-allowed; }
.field textarea { width: 100%; padding: 0.5rem 0.625rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.875rem; font-family: inherit; resize: vertical; }
.field-wide { grid-column: 1 / -1; }

@media (max-width: 640px) {
    header { padding: 0.75rem 1rem; }
    header h1 { font-size: 1rem; }
    .tabs { padding: 0 1rem; overflow-x: auto; }
    .tab-btn { padding: 0.75rem 0.75rem; white-space: nowrap; }
    main { padding: 0 0.5rem; margin: 1rem auto; }
    .section { padding: 1rem; }
    .form-grid { grid-template-columns: 1fr; }
    .form-actions { flex-wrap: wrap; }
    .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    table { min-width: 540px; }
    .btn-edit, .btn-del { padding: 0.4rem 0.6rem; min-height: 32px; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}