:root {
    --color-bg: #e4eef0;
    --color-bg-gradient-top: #f2f7f9;
    --color-surface: #fbfefe;
    --color-surface-strong: #dfe9ea;
    --color-surface-solid: #ffffff;
    --color-surface-soft: #f0f7f6;
    --color-border: #b9c1cb;
    --color-border-soft: #dbe6e7;
    --color-text: #27363b;
    --color-muted: #60757b;
    --color-primary: #2d4784;
    --color-primary-dark: #353f4b;
    --color-primary-contrast: #f4fbfb;
    --color-accent: #cfe5e3;
    --color-alert-border: #bb9d9a;
    --color-alert-bg: #f4f0e9;
    --color-overlay-warm: rgba(123, 178, 176, 0.24);
    --color-surface-overlay-strong: rgba(251, 254, 254, 0.94);
    --color-surface-overlay: rgba(251, 254, 254, 0.88);
    --color-border-overlay: rgba(185, 203, 202, 0.9);
    --color-focus-ring: rgba(45, 105, 132, 0.22);
    --shadow-color-soft: rgba(50, 73, 82, 0.12);
    --shadow-soft: 0 18px 40px var(--shadow-color-soft);
    --radius-lg: 22px;
    --radius-md: 14px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, var(--color-overlay-warm), transparent 32%),
        linear-gradient(180deg, var(--color-bg-gradient-top) 0%, var(--color-bg) 100%);
    color: var(--color-text);
    font-family: Arial, Helvetica, sans-serif;
}

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

button,
input {
    font: inherit;
}

.app-shell {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    padding: 18px 22px;
    background: var(--color-surface-overlay);
    border: 1px solid var(--color-border-overlay);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(6px);
}

.topbar__brand,
.topbar__nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar__brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.topbar__eyebrow,
.section-kicker {
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.topbar__title {
    font-size: 20px;
}

.topbar__nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--color-muted);
}

.topbar__user {
    color: var(--color-text);
    font-size: 14px;
    font-weight: bold;
}

.topbar__nav a:hover,
.topbar__nav a:focus {
    background: var(--color-surface-strong);
    color: var(--color-text);
}

.page__header {
    margin-bottom: 24px;
}

.page__header h1 {
    margin: 0 0 8px;
    font-size: 40px;
    line-height: 1.05;
}

.page__header p {
    max-width: 720px;
    margin: 0;
    color: var(--color-muted);
    font-size: 17px;
    line-height: 1.6;
}

.auth-card,
.panel-card {
    background: var(--color-surface-overlay-strong);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.auth-card {
    max-width: 480px;
    padding: 28px;
}

.auth-card__header h2,
.panel-card__toolbar h2 {
    margin: 8px 0 10px;
    font-size: 28px;
}

.auth-card__header p {
    margin: 0 0 22px;
    color: var(--color-muted);
}

.form-card,
.placeholder-search {
    display: grid;
    gap: 18px;
}

.form-row {
    display: grid;
    gap: 8px;
}

.form-row label,
.placeholder-search label {
    font-size: 14px;
    font-weight: bold;
}

.form-row input,
.placeholder-search input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-solid);
    color: var(--color-text);
}

.form-row input:focus,
.placeholder-search input:focus {
    outline: 2px solid var(--color-focus-ring);
    border-color: var(--color-primary);
}

.form-actions {
    padding-top: 6px;
}

.alert {
    margin-bottom: 18px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 14px;
}

.alert-error {
    border-color: var(--color-alert-border);
    background: var(--color-alert-bg);
    color: var(--color-primary-dark);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: bold;
    cursor: pointer;
}

.button-small {
    padding: 8px 12px;
    font-size: 13px;
}

.button-primary {
    background: var(--color-text);
    color: var(--color-primary-contrast);
}

.button-primary:hover,
.button-primary:focus {
    background: var(--color-primary);
}

.button-secondary {
    background: var(--color-surface-strong);
    border-color: var(--color-border);
    color: var(--color-text);
}

.panel-card {
    padding: 24px;
}

.panel-card__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 22px;
}

.table-placeholder {
    overflow-x: auto;
    margin-top: 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-solid);
}

.table-placeholder table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.table-placeholder th,
.table-placeholder td {
    padding: 16px 18px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-soft);
}

.table-placeholder th {
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-muted);
    background: var(--color-surface-soft);
}

.table-placeholder tbody tr:last-child td {
    border-bottom: 0;
}

.badge {
    display: inline-block;
    padding: 7px 10px;
    border-radius: 999px;
    background: var(--color-accent);
    color: var(--color-primary-dark);
    font-size: 13px;
    font-weight: bold;
}

@media (max-width: 720px) {
    .app-shell {
        padding: 16px;
    }

    .topbar,
    .panel-card__toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .topbar__nav {
        width: 100%;
        flex-wrap: wrap;
    }

    .page__header h1 {
        font-size: 32px;
    }

    .auth-card,
    .panel-card {
        padding: 20px;
    }
}