:root {
    --cg-blue-900: #1e3a8a;
    --cg-blue-700: #1d4ed8;
    --cg-blue-500: #3b82f6;
    --cg-amber-400: #fbbf24;
    --cg-amber-500: #f59e0b;
    --cg-slate-950: #0f172a;
    --cg-slate-800: #1e293b;
    --cg-slate-600: #475569;
    --cg-slate-500: #64748b;
    --cg-slate-300: #cbd5e1;
    --cg-slate-200: #e2e8f0;
    --cg-slate-100: #f1f5f9;
    --cg-slate-50: #f8fafc;
    --cg-radius: 18px;
    --cg-shadow: 0 18px 50px rgba(15, 23, 42, .09);
}

html { scroll-behavior: smooth; }
html, body { min-height: 100%; }
body {
    margin: 0;
    font-family: Inter, "Segoe UI", Tahoma, Arial, sans-serif;
    color: var(--cg-slate-800);
    background: var(--cg-slate-50);
}

.modern-layout { min-height: 100vh; display: flex; flex-direction: column; background: var(--cg-slate-50); }
.top-header {
    position: sticky;
    inset-block-start: 0;
    z-index: 1000;
    background: linear-gradient(135deg, var(--cg-blue-900), var(--cg-blue-500));
    box-shadow: 0 8px 28px rgba(30, 58, 138, .22);
}
.header-container {
    max-width: 1400px;
    min-height: 72px;
    margin-inline: auto;
    padding-inline: clamp(1rem, 3vw, 2rem);
    display: flex;
    align-items: center;
    gap: clamp(.75rem, 2vw, 2rem);
}
.brand-link { display: inline-flex; align-items: center; gap: .7rem; color: #fff; text-decoration: none; flex: 0 0 auto; }
.logo { width: 42px; height: 42px; object-fit: contain; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-name { font-size: 1.25rem; letter-spacing: -.02em; }
.brand-copy small { margin-block-start: .25rem; color: #dbeafe; font-size: .68rem; white-space: nowrap; }

.main-nav { display: flex; align-items: center; gap: .25rem; flex: 1; }
.main-nav a {
    padding: .68rem .8rem;
    border-radius: 10px;
    color: rgba(255,255,255,.88);
    text-decoration: none;
    font-weight: 600;
    font-size: .92rem;
    white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: #fff; background: rgba(255,255,255,.14); }
.main-nav a:focus-visible, .brand-link:focus-visible, .header-actions a:focus-visible,
.header-actions button:focus-visible, .hamburger:focus-visible { outline: 3px solid var(--cg-amber-400); outline-offset: 3px; }

.header-actions { display: flex; align-items: center; gap: .55rem; margin-inline-start: auto; }
.header-actions form { margin: 0; }
.user-section { display: flex; align-items: center; gap: .4rem; }
.user-link, .control-badge, .btn-login, .btn-logout {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 10px;
    background: rgba(255,255,255,.1);
    color: #fff;
    text-decoration: none;
    padding: .5rem .7rem;
}
.control-badge { width: 40px; padding: 0; }
.btn-login, .btn-logout { cursor: pointer; font-weight: 700; }
.user-link:hover, .control-badge:hover, .btn-login:hover, .btn-logout:hover { color: #fff; background: rgba(255,255,255,.2); }
.user-email { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    padding: 10px;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 10px;
    background: rgba(255,255,255,.1);
}
.hamburger-line { display: block; height: 2px; margin-block: 4px; border-radius: 2px; background: #fff; }
.mobile-overlay { position: fixed; inset: 64px 0 0; z-index: 998; border: 0; background: rgba(15,23,42,.55); }

.main-content { flex: 1; padding: clamp(.75rem, 2.5vw, 2rem); }
.content-container { max-width: 1400px; margin-inline: auto; }

.valid.modified:not([type=checkbox]) { outline: 1px solid #16a34a; }
.invalid { outline: 1px solid #dc2626; }
.validation-message { color: #b91c1c; font-size: .875rem; margin-block-start: .3rem; }

.blazor-error-boundary { padding: 1rem; border-radius: 12px; color: #fff; background: #b91c1c; }
.blazor-error-boundary::after { content: "An error has occurred."; }
#blazor-error-ui { color-scheme: light only; background: #fffbeb; bottom: 0; box-shadow: 0 -1px 8px rgba(0,0,0,.2); display: none; inset-inline: 0; padding: .8rem 1.25rem; position: fixed; z-index: 2000; }
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; inset-inline-end: .75rem; inset-block-start: .5rem; }

@media (max-width: 1100px) {
    .brand-copy small, .user-email { display: none; }
    .main-nav a { padding-inline: .6rem; }
}

@media (max-width: 840px) {
    .header-container { min-height: 64px; }
    .hamburger { display: block; order: 3; }
    .main-nav {
        position: fixed;
        inset-block: 64px 0;
        inset-inline-end: -310px;
        z-index: 999;
        width: min(310px, 88vw);
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: .35rem;
        background: var(--cg-blue-900);
        box-shadow: -16px 0 35px rgba(15,23,42,.22);
        transition: inset-inline-end .25s ease;
    }
    .main-nav.mobile-open { inset-inline-end: 0; }
    .main-nav a { padding: .9rem 1rem; }
    .header-actions { margin-inline-start: auto; }
    .btn-login span, .btn-logout span { display: none; }
    .btn-login, .btn-logout { width: 40px; padding: 0; }
}

@media (max-width: 520px) {
    .brand-name { font-size: 1rem; }
    .logo { width: 34px; height: 34px; }
    .header-container { gap: .35rem; padding-inline: .65rem; }
    .header-actions { gap: .3rem; }
    .main-content { padding: .65rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}