@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

:root {
    --sidebar-bg: #111827;
    --sidebar-hover: #1f2937;
    --sidebar-active: #374151;
    --sidebar-text: #9ca3af;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --surface: #ffffff;
    --surface-secondary: #f9fafb;
    --border: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #0284c7;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 15px;
    color: var(--text-primary);
    background: var(--surface-secondary);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

h1, h2, h3, h4, h5, h6 { font-weight: 700; color: var(--text-primary); }

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    transition: all 0.15s ease;
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-lg { padding: 0.625rem 1.25rem; font-size: 0.938rem; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.813rem; }
.btn:focus { box-shadow: 0 0 0 0.2rem rgba(37,99,235,0.25); }

/* Cards */
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    background: var(--surface);
}
.card-header {
    background: var(--surface-secondary);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

/* Forms */
.form-control, .form-select {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(37,99,235,0.15);
}
.form-control-lg { padding: 0.625rem 0.875rem; font-size: 0.938rem; }
.form-label { font-size: 0.875rem; color: var(--text-primary); margin-bottom: 0.375rem; }
.form-text { font-size: 0.8rem; color: var(--text-secondary); }

/* Tables */
.table { font-size: 0.875rem; color: var(--text-primary); }
.table thead th {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: var(--surface-secondary);
    border-bottom: 2px solid var(--border);
    padding: 0.625rem 0.75rem;
}
.table tbody td { padding: 0.625rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table-striped > tbody > tr:nth-of-type(odd) > * { background: var(--surface-secondary); }
.table-hover > tbody > tr:hover > * { background: var(--primary-light); }

/* Badges */
.badge {
    font-weight: 600;
    font-size: 0.7rem;
    padding: 0.25em 0.6em;
    border-radius: 0.25rem;
}

/* Breadcrumbs */
.breadcrumb {
    font-size: 0.813rem;
}
.breadcrumb-item a { color: var(--text-secondary); }
.breadcrumb-item.active { color: var(--text-primary); font-weight: 500; }

/* Content area */
.content { padding-top: 1.25rem; }

/* Sidebar overrides */
.page { display: flex; }
.sidebar {
    background: var(--sidebar-bg);
    width: 260px;
    min-height: 100vh;
    position: sticky;
    top: 0;
}
main {
    flex: 1;
    min-width: 0;
    background: var(--surface-secondary);
}
.top-row {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    min-height: 3.25rem;
    display: flex;
    align-items: center;
}

/* Nav sidebar */
.nav-scrollable { background: var(--sidebar-bg); }
.navbar-brand { color: #fff !important; font-weight: 700; font-size: 1.15rem; }
.navbar-dark { background: var(--sidebar-bg) !important; }

.nav-item ::deep .nav-link {
    color: var(--sidebar-text);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.12s;
}
.nav-item ::deep .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}
.nav-item ::deep a.active {
    background: var(--sidebar-active);
    color: #fff;
}

/* Alert styling */
.alert {
    border-radius: var(--radius-lg);
    border: 1px solid;
    font-size: 0.875rem;
}
.alert-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.alert-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }

/* Accordion improvements */
.accordion-button { font-weight: 600; font-size: 0.938rem; }
.accordion-button:not(.collapsed) { background: var(--primary-light); color: var(--primary); }

/* Stat cards */
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}
.stat-card:hover { box-shadow: var(--shadow-md); }

/* Nav tabs */
.nav-tabs {
    border-bottom: 2px solid var(--border);
}
.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.813rem;
    padding: 0.625rem 1rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}
.nav-tabs .nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: none;
}
.nav-tabs .nav-link:hover { color: var(--text-primary); border-bottom-color: var(--border); }

/* Section toggle headers (registration page) */
.section-toggle {
    font-weight: 600;
    font-size: 0.938rem;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}
.section-toggle:hover { background: var(--surface-secondary); }

/* Validation */
.valid.modified:not([type=checkbox]) { outline: 1px solid var(--success); }
.invalid { outline: 1px solid var(--danger); }
.validation-message { color: var(--danger); font-size: 0.8rem; }

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNTYiIGhlaWdodD0iNDkiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiIG92ZXJmbG93PSJoaWRkZW4iPjxkZWZzPjxjbGlwUGF0aCBpZD0iY2xpcDAiPjxyZWN0IHg9IjIzNSIgeT0iNTEiIHdpZHRoPSI1NiIgaGVpZ2h0PSI0OSIvPjwvY2xpcFBhdGg+PC9kZWZzPjxnIGNsaXAtcGF0aD0idXJsKCNjbGlwMCkiIHRyYW5zZm9ybT0idHJhbnNsYXRlKC0yMzUgLTUxKSI+PHBhdGggZD0iTTI2My41MDYgNTFDMjY0LjcxNyA1MSAyNjUuODEzIDUxLjQ4MzcgMjY2LjYwNiA1Mi4yNjU4TDI2Ny4wNTIgNTIuNzk4NyAyNjcuNTM5IDUzLjYyODMgMjkwLjE4NSA5Mi4xODMxIDI5MC41NDUgOTIuNzk1IDI5MC42NTYgOTIuOTk2QzI5MC44NzcgOTMuNTEzIDI5MSA5NC4wODE1IDI5MSA5NC42NzgyIDI5MSA5Ny4wNjUxIDI4OS4wMzggOTkgMjg2LjYxNyA5OUwyNDAuMzgzIDk5QzIzNy45NjMgOTkgMjM2IDk3LjA2NTEgMjM2IDk0LjY3ODIgMjM2IDk0LjM3OTkgMjM2LjAzMSA5NC4wODg2IDIzNi4wODkgOTMuODA3MkwyMzYuMzM4IDkzLjAxNjIgMjM2Ljg1OCA5Mi4xMzE0IDI1OS40NzMgNTMuNjI5NCAyNTkuOTYxIDUyLjc5ODUgMjYwLjQwNyA1Mi4yNjU4QzI2MS4yIDUxLjQ4MzcgMjYyLjI5NiA1MSAyNjMuNTA2IDUxWk0yNjMuNTg2IDY2LjAxODNDMjYwLjczNyA2Ni4wMTgzIDI1OS4zMTMgNjcuMTI0NSAyNTkuMzEzIDY5LjMzNyAyNTkuMzEzIDY5LjYxMDIgMjU5LjMzMiA2OS44NjA4IDI1OS4zNzEgNzAuMDg4N0wyNjEuNzk1IDg0LjAxNjEgMjY1LjM4IDg0LjAxNjEgMjY3LjgyMSA2OS43NDc1QzI2Ny44NiA2OS43MzA5IDI2Ny44NzkgNjkuNTg3NyAyNjcuODc5IDY5LjMxNzkgMjY3Ljg3OSA2Ny4xMTgyIDI2Ni40NDggNjYuMDE4MyAyNjMuNTg2IDY2LjAxODNaTTI2My41NzYgODYuMDU0N0MyNjEuMDQ5IDg2LjA1NDcgMjU5Ljc4NiA4Ny4zMDA1IDI1OS43ODYgODkuNzkyMSAyNTkuNzg2IDkyLjI4MzcgMjYxLjA0OSA5My41Mjk1IDI2My41NzYgOTMuNTI5NSAyNjYuMTE2IDkzLjUyOTUgMjY3LjM4NyA5Mi4yODM3IDI2Ny4zODcgODkuNzkyMSAyNjcuMzg3IDg3LjMwMDUgMjY2LjExNiA4Ni4wNTQ3IDI2My41NzYgODYuMDU0N1oiIGZpbGw9IiNGRkU1MDAiIGZpbGwtcnVsZT0iZXZlbm9kZCIvPjwvZz48L3N2Zz4=) no-repeat 1rem/1.8rem, var(--danger);
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}
.blazor-error-boundary::after { content: "An error has occurred." }

/* PWA / Mobile optimizations */
@@media (max-width: 767px) {
    .container { padding-left: 0.75rem; padding-right: 0.75rem; }
    .content { padding: 0; }
    main { padding-bottom: 60px; }
    .btn-lg { font-size: 1rem; padding: 0.75rem 1rem; }
    .form-control-lg { font-size: 1rem; padding: 0.75rem; }
    input[type=number], input[type=password] { font-size: 16px; } /* prevent iOS zoom */
}
@@media (display-mode: standalone) {
    header, .top-row { padding-top: env(safe-area-inset-top); }
    .mobile-nav { padding-bottom: env(safe-area-inset-bottom); }
}