:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --border: #dbe1ea;
    --border-strong: #c5ced9;
    --text: #111827;
    --text-muted: #667085;
    --primary: #111827;
    --secondary: #4b5563;
    --accent: #0f172a;
    --success: #166534;
    --warning: #9a6700;
    --danger: #b42318;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
    --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.06);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --spacing: 1rem;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

body.app-shell {
    background: linear-gradient(to bottom, #f8fafc 0, #f8fafc 220px, #f5f7fa 220px, #f5f7fa 100%);
}

a {
    color: inherit;
}

.app-navbar {
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
}

.brand-mark {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
}

.nav-link {
    color: var(--secondary);
    font-weight: 500;
}

.nav-link:hover,
.nav-link:focus,
.link-dark:hover,
.link-dark:focus {
    color: #000 !important;
}

.hero-section {
    background: transparent;
}

.eyebrow,
.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.display-title {
    font-size: clamp(2.1rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
    max-width: 12ch;
}

.hero-copy {
    max-width: 62ch;
    color: var(--text-muted);
    font-size: 1rem;
}

.panel-card,
.empty-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.panel-card {
    box-shadow: var(--shadow-md);
}

.metric-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    background: var(--surface-muted);
    min-height: 100%;
}

.metric-card span {
    display: block;
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-bottom: 0.35rem;
}

.metric-card strong {
    font-size: 1.6rem;
    line-height: 1;
    letter-spacing: -0.03em;
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.workflow-grid article {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    background: var(--surface-muted);
}

.workflow-grid span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.workflow-grid h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.workflow-grid p,
.empty-card p,
.quick-links .list-group-item,
.stack-item p,
.detail-note {
    color: var(--text-muted);
}

.quick-links .list-group-item {
    padding-inline: 0;
    border-color: var(--border);
    background: transparent;
}

.stack-list {
    display: grid;
    gap: 0.9rem;
}

.stack-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.95rem 1rem;
    background: var(--surface-muted);
}

.app-table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: #f8fafc;
    margin-bottom: 0;
}

.app-table thead th {
    background: #f8fafc;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom-width: 1px;
}

.app-table td,
.app-table th {
    padding: 1rem;
    border-color: var(--border);
}

.auth-wrap {
    min-height: calc(100vh - 180px);
    display: flex;
    align-items: center;
}

.form-control,
.form-select {
    min-height: 44px;
    border-color: var(--border-strong);
    border-radius: var(--radius-sm);
    padding-inline: 0.9rem;
    background-color: #fff;
}

.form-control:focus,
.form-select:focus,
.btn:focus,
.nav-link:focus {
    box-shadow: 0 0 0 0.2rem rgba(17, 24, 39, 0.12);
    border-color: var(--primary);
}

.btn {
    border-radius: var(--radius-sm);
    padding: 0.7rem 1rem;
    font-weight: 600;
}

.btn-lg {
    padding: 0.85rem 1.25rem;
}

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

.btn-outline-secondary {
    color: var(--secondary);
    border-color: var(--border-strong);
}

.detail-list {
    display: grid;
    gap: 1rem;
}

.detail-list div {
    display: grid;
    gap: 0.25rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--border);
}

.detail-list div:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}

.detail-list dt {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.detail-list dd {
    margin: 0;
    font-size: 1rem;
}

.toast {
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.text-bg-success {
    background-color: var(--success) !important;
}

.text-bg-warning {
    background-color: var(--warning) !important;
    color: #fff !important;
}

.text-bg-danger {
    background-color: var(--danger) !important;
}

.text-bg-info {
    background-color: #344054 !important;
}

.badge.text-bg-light {
    background: #f8fafc !important;
    color: var(--secondary) !important;
}

.sticky-form-card {
    position: sticky;
    top: 5.5rem;
}

.app-footer {
    background: transparent;
}

@media (max-width: 991.98px) {
    .workflow-grid {
        grid-template-columns: 1fr;
    }

    .sticky-form-card {
        position: static;
    }
}

@media (max-width: 575.98px) {
    .display-title {
        max-width: none;
    }

    .panel-card,
    .empty-card {
        border-radius: var(--radius-md);
    }

    .app-table td,
    .app-table th {
        padding: 0.8rem;
    }
}