:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-muted: #eef3f8;
    --ink: #18212f;
    --muted: #667085;
    --line: #d9e1ea;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --accent: #dc6b46;
    --danger: #b42318;
    --danger-bg: #fff1f0;
    --shadow: 0 16px 45px rgba(24, 33, 47, 0.1);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100%;
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    letter-spacing: 0;
}

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

button,
input,
select {
    font: inherit;
}

.login-page {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 24px;
    background:
        linear-gradient(135deg, rgba(15, 118, 110, 0.12), transparent 36%),
        linear-gradient(315deg, rgba(220, 107, 70, 0.14), transparent 38%),
        var(--bg);
}

.login-shell {
    width: min(100%, 420px);
}

.login-panel {
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.brand-mark {
    display: inline-flex;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
}

.brand-mark.small {
    width: 36px;
    height: 36px;
    font-size: 13px;
}

.login-panel h1,
.topbar h1,
.welcome-panel h2,
.panel h3 {
    margin: 0;
    line-height: 1.15;
}

.login-panel h1 {
    margin-top: 20px;
    font-size: 28px;
}

.login-subtitle,
.demo-note,
.stat-card p,
.welcome-panel p,
.module-list span,
.check-list {
    color: var(--muted);
}

.login-subtitle {
    margin: 8px 0 24px;
}

.login-form {
    display: grid;
    gap: 10px;
}

.login-form label {
    font-weight: 700;
}

.login-form input {
    width: 100%;
    min-height: 44px;
    margin-bottom: 8px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    color: var(--ink);
}

.login-form input:focus {
    border-color: var(--primary);
    outline: 3px solid rgba(15, 118, 110, 0.15);
}

.alert {
    margin-bottom: 18px;
    padding: 12px 14px;
    border-radius: var(--radius);
}

.alert-error {
    border: 1px solid #f4b2aa;
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-success {
    border: 1px solid #a7d9c9;
    background: #ecfdf5;
    color: #067647;
}

.btn {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 700;
}

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

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

.btn-light {
    border-color: var(--line);
    background: var(--surface);
    color: var(--ink);
}

.demo-note {
    margin: 18px 0 0;
    font-size: 13px;
}

.admin-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 20;
    width: 260px;
    padding: 20px;
    border-right: 1px solid #173b48;
    background: #102a3a;
    color: #d9e9ef;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
    font-weight: 700;
}

.sidebar-nav {
    display: grid;
    gap: 6px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 10px 12px;
    border-radius: var(--radius);
    color: #b7cad4;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: #16384b;
    color: #ffffff;
}

.nav-icon {
    display: inline-flex;
    width: 24px;
    height: 24px;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.12);
    font-size: 12px;
    font-weight: 700;
}

.content-shell {
    width: 100%;
    margin-left: 260px;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 76px;
    padding: 16px 28px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
}

.eyebrow {
    margin: 0 0 4px;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.topbar h1 {
    font-size: 22px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-menu span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.avatar {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--accent);
    color: #ffffff;
    font-weight: 700;
}

.icon-button {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    cursor: pointer;
}

.icon-button span {
    width: 18px;
    height: 2px;
    background: var(--ink);
}

.page-content {
    padding: 28px;
}

.welcome-panel,
.panel,
.stat-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 10px 28px rgba(24, 33, 47, 0.05);
}

.welcome-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 22px;
    padding: 28px;
}

.welcome-panel p {
    max-width: 720px;
    margin: 10px 0 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 22px;
}

.stat-card {
    padding: 20px;
}

.stat-label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.stat-card strong {
    display: block;
    margin: 8px 0 6px;
    font-size: 30px;
    line-height: 1;
}

.stat-card p {
    margin: 0;
}

.panel-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
    gap: 16px;
}

.panel {
    padding: 22px;
}

.panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.module-list {
    display: grid;
    gap: 10px;
}

.module-list a {
    display: grid;
    gap: 4px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.module-list a:hover {
    border-color: var(--primary);
    background: #f7fbfb;
}

.check-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding-left: 18px;
}

.account-layout {
    display: grid;
    grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.7fr);
    gap: 16px;
}

.stack-form {
    display: grid;
    gap: 10px;
}

.stack-form.compact {
    gap: 8px;
}

.stack-form label,
.inline-form label {
    font-weight: 700;
}

.stack-form input,
.stack-form select {
    width: 100%;
    min-height: 40px;
    padding: 9px 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    color: var(--ink);
}

.stack-form input:focus,
.stack-form select:focus {
    border-color: var(--primary);
    outline: 3px solid rgba(15, 118, 110, 0.15);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 12px 10px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.data-table th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

.data-table td span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.badge {
    display: inline-flex;
    width: max-content;
    align-items: center;
    padding: 4px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.badge-success {
    background: #ecfdf5;
    color: #067647;
}

.badge-muted {
    background: var(--surface-muted);
    color: var(--muted);
}

.table-actions {
    min-width: 180px;
}

.table-actions details {
    position: relative;
}

.table-actions summary {
    list-style: none;
}

.table-actions summary::-webkit-details-marker {
    display: none;
}

.details-panel {
    position: absolute;
    right: 0;
    z-index: 8;
    width: min(420px, 78vw);
    margin-top: 8px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.details-panel form + form {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.inline-form {
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 180ms ease;
    }

    .sidebar.is-open {
        transform: translateX(0);
    }

    .content-shell {
        margin-left: 0;
    }

    .icon-button {
        display: inline-flex;
    }

    .topbar {
        align-items: flex-start;
        padding: 14px 18px;
    }

    .user-menu {
        gap: 8px;
    }

    .user-menu div:nth-child(2) {
        display: none;
    }

    .page-content {
        padding: 18px;
    }

    .welcome-panel,
    .panel-grid,
    .account-layout {
        display: grid;
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .login-panel {
        padding: 24px;
    }

    .topbar h1 {
        font-size: 18px;
    }

    .welcome-panel,
    .panel,
    .stat-card {
        padding: 18px;
    }

    .btn {
        width: 100%;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .details-panel {
        position: static;
        width: 100%;
    }
}