:root {
    --color-bg: #f3f6fa;
    --color-bg-strong: #edf2f7;
    --color-surface: #ffffff;
    --color-surface-soft: #f8fafc;
    --color-surface-muted: #f1f5f9;

    --color-text: #172033;
    --color-heading: #0b1220;
    --color-muted: #64748b;
    --color-muted-strong: #475569;
    --color-border: #d9e2ec;
    --color-border-strong: #c5d1dd;

    --color-primary: #0d2b45;
    --color-primary-hover: #082238;
    --color-primary-soft: #e7eef5;
    --color-secondary: #176b57;
    --color-secondary-soft: #e5f3ee;
    --color-accent: #a66f1e;
    --color-accent-soft: #fff3db;

    --color-danger: #b42318;
    --color-danger-soft: #fff1ef;
    --color-success: #187048;
    --color-success-soft: #e8f7ef;
    --color-warning: #946200;
    --color-warning-soft: #fff5dd;
    --color-info: #1d5d8f;
    --color-info-soft: #e8f2fb;

    --shadow-xs: 0 1px 2px rgba(15, 47, 74, 0.05);
    --shadow-sm: 0 6px 18px rgba(15, 47, 74, 0.07);
    --shadow-md: 0 18px 44px rgba(15, 47, 74, 0.13);

    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;

    --font-base: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --sidebar-width: 276px;
    --topbar-height: 68px;
    --content-max: 1480px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--color-bg);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-base);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    cursor: pointer;
}

img {
    max-width: 100%;
    display: block;
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: 18px 0;
}

::selection {
    background: rgba(13, 43, 69, 0.16);
}

.container {
    width: min(var(--content-max), calc(100% - 32px));
    margin: 0 auto;
}

.text-muted {
    color: var(--color-muted);
}

.hidden {
    display: none !important;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 13px;
    font-weight: 750;
    line-height: 1;
    letter-spacing: 0;
    transition: background .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease, transform .18s ease;
    white-space: nowrap;
}

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

.btn:focus-visible,
.form-control:focus-visible,
.sidebar-toggle:focus-visible {
    outline: 3px solid rgba(29, 93, 143, 0.22);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset;
}

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

.btn-secondary {
    background: var(--color-secondary);
    color: #ffffff;
}

.btn-outline {
    background: #ffffff;
    color: var(--color-primary);
    border-color: var(--color-border-strong);
}

.btn-outline:hover {
    background: var(--color-primary-soft);
    border-color: #b4c3d2;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
}

.alert {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 700;
}

.alert-error {
    color: var(--color-danger);
    background: var(--color-danger-soft);
    border: 1px solid #f4c7c3;
}

.alert-success {
    color: var(--color-success);
    background: var(--color-success-soft);
    border: 1px solid #bdebd2;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}