:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #64748b;
    --color-success: #16a34a;
    --color-warning: #ca8a04;
    --color-danger: #dc2626;
    --color-info: #0891b2;
    --color-neutral: #6b7280;
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-background);
    line-height: 1.5;
}

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

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

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

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.shell__layout {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr;
}

.shell__sidebar {
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    padding: var(--spacing-lg);
}

.shell__main-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.shell__header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
}

.shell__main {
    flex: 1;
    padding: var(--spacing-lg);
}

.shell__footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-sm);
    line-height: 1.25;
}

p {
    margin: 0 0 var(--spacing-md);
}

.hidden {
    display: none !important;
}

.customer-picker {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.customer-picker__control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.customer-picker__input {
    flex: 1;
}

.customer-picker__clear {
    border: 0;
    background: transparent;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-muted);
}

.customer-picker__selected {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-muted, #f8fafc);
}

.customer-picker__results {
    position: absolute;
    top: calc(100% - 0.25rem);
    left: 0;
    right: 0;
    z-index: 20;
    margin: 0;
    padding: 0.25rem 0;
    list-style: none;
    max-height: 16rem;
    overflow: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
}

.customer-picker__option,
.customer-picker__empty {
    padding: 0.65rem 0.75rem;
    cursor: pointer;
}

.customer-picker__option--active,
.customer-picker__option:hover {
    background: var(--color-surface-muted, #f1f5f9);
}

.customer-picker__option-name {
    display: block;
    font-weight: 600;
}

.customer-picker__option-meta {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.customer-picker__hint,
.customer-picker__error {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.customer-picker__error {
    color: var(--color-danger, #b42318);
}

.customer-picker__card--profile {
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-muted, #f8fafc);
}

.customer-picker__card-heading {
    margin-bottom: 0.35rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.customer-picker__name {
    display: block;
    margin-bottom: 0.55rem;
    font-size: 1rem;
    line-height: 1.3;
}

.customer-picker__profile-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem 1rem;
    margin: 0;
}

.customer-picker__profile-grid div {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.customer-picker__profile-grid dt {
    margin: 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.customer-picker__profile-grid dd {
    margin: 0;
    font-size: 0.92rem;
    color: var(--color-text);
}

.customer-picker__profile-grid__full {
    grid-column: 1 / -1;
}

@media (max-width: 640px) {
    .customer-picker__profile-grid {
        grid-template-columns: 1fr;
    }
}