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

html {
    min-width: 320px;
    min-height: 100%;
    background: var(--color-bg-primary);
    font-family: var(--font-sans);
    text-rendering: optimizeLegibility;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--color-text-primary);
    background:
        radial-gradient(circle at 85% -10%, color-mix(in srgb, var(--color-accent-blue) 10%, transparent), transparent 32rem),
        var(--color-bg-primary);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    transition: color 180ms ease-out, background-color 180ms ease-out;
}

a {
    color: var(--color-accent-blue);
    text-underline-offset: 3px;
}

a:hover {
    color: var(--color-accent-blue-dark);
}

:focus-visible {
    outline: 3px solid var(--color-accent-blue);
    outline-offset: 3px;
}

::selection {
    color: var(--color-bg-elevated);
    background: var(--color-accent-blue);
}

.app-shell {
    min-height: 100vh;
}

.app-header {
    position: sticky;
    z-index: 100;
    top: 0;
    display: flex;
    min-height: 64px;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    padding: var(--spacing-md) var(--content-gutter);
    border-bottom: 1px solid color-mix(in srgb, var(--color-border) 84%, transparent);
    color: var(--color-text-primary);
    background: color-mix(in srgb, var(--color-bg-elevated) 92%, transparent);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(18px) saturate(135%);
}

.brand,
.app-header a {
    border-radius: var(--radius-sm);
    color: inherit;
    text-decoration: none;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.brand::before {
    width: 11px;
    height: 28px;
    border-radius: var(--radius-full);
    background: linear-gradient(180deg, var(--color-accent-blue-light), var(--color-accent-blue-dark));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent-blue) 12%, transparent);
    content: "";
}

.app-header nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-xs);
}

.app-header nav a {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    transition: color 150ms ease-out, background-color 150ms ease-out;
}

.app-header nav a:hover {
    color: var(--color-accent-blue);
    background: var(--color-info-bg);
}

.content {
    width: min(100%, 1440px);
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--content-gutter) var(--spacing-3xl);
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
    margin-top: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text-primary);
    letter-spacing: -0.015em;
}

.account-card {
    width: min(100%, 32rem);
    margin: clamp(var(--spacing-xl), 7vh, 5rem) auto;
    padding: clamp(var(--spacing-xl), 5vw, var(--spacing-2xl));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    color: var(--color-text-primary);
    background: color-mix(in srgb, var(--color-bg-elevated) 96%, transparent);
    box-shadow: var(--shadow-xl);
}

form {
    display: grid;
    gap: var(--spacing-md);
}

label {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

input,
select,
textarea {
    width: 100%;
    min-height: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
    font: inherit;
    transition: border-color 150ms ease-out, box-shadow 150ms ease-out;
}

input:hover,
select:hover,
textarea:hover {
    border-color: color-mix(in srgb, var(--color-accent-blue) 55%, var(--color-border));
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--color-accent-blue);
    outline: 0;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent-blue) 18%, transparent);
}

button,
.button {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: #ffffff;
    background: var(--color-accent-blue);
    box-shadow: var(--shadow-sm);
    font: inherit;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: background-color 150ms ease-out, box-shadow 150ms ease-out, transform 150ms ease-out;
}

button:hover,
.button:hover {
    color: #ffffff;
    background: var(--color-accent-blue-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

button:disabled,
.button[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.58;
    transform: none;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.checkbox-label input {
    width: 18px;
    min-height: 18px;
    accent-color: var(--color-accent-blue);
}

.validation-message {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.status-message {
    padding: var(--spacing-md);
    border: 1px solid currentColor;
    border-radius: var(--radius-md);
    color: var(--color-success);
    background: var(--color-success-bg);
}

.mud-paper,
.mud-table-container,
.mud-popover,
.mud-dialog {
    border-color: var(--color-border);
}

.mud-paper {
    background-color: var(--color-bg-elevated);
}

@media (max-width: 760px) {
    .app-header {
        position: relative;
        align-items: flex-start;
        flex-direction: column;
        padding-block: var(--spacing-lg);
    }

    .app-header nav {
        width: 100%;
        justify-content: flex-start;
    }

    .app-header nav a {
        flex: 1 1 auto;
        justify-content: center;
    }

    .content {
        padding-top: var(--spacing-xl);
    }
}