/* =========================================
   KREVIA - Layout (Login, Sidebar, Topbar, Main)
   ========================================= */

/* LOGIN */
.login-screen { position: fixed; inset: 0; z-index: 9999; background: var(--bg-primary); display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-screen.hidden { display: none; }
.login-card { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2.5rem; width: 100%; max-width: 400px; box-shadow: var(--shadow-lg); }
.login-logo { text-align: center; margin-bottom: 1rem; }

/* Krevia Logo */
.krevia-logo {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    letter-spacing: -0.03em;
    display: inline-block;
    background: var(--accent);
    color: #0a0a0a;
    padding: 0.3em 0.7em;
    border-radius: 12px;
    font-size: 2rem;
    line-height: 1.2;
}
.krevia-logo .krevia-dot {
    font-family: 'Playfair Display', serif !important;
    font-style: italic !important;
    font-weight: 700;
    letter-spacing: 0;
}
.krevia-logo-sm { font-size: 1.5rem; padding: 0.25em 0.6em; border-radius: 10px; }
.login-title { font-size: 1.5rem; font-weight: 800; text-align: center; color: var(--accent); }
.login-sub { text-align: center; color: var(--text-secondary); font-size: .9rem; margin: .5rem 0 1.5rem; }
.login-error { background: var(--red-light); color: var(--red); padding: .6rem .8rem; border-radius: var(--radius-md); font-size: .85rem; margin-bottom: 1rem; text-align: center; }
.login-error.hidden { display: none; }
.login-lockout { text-align: center; color: var(--red); font-size: .85rem; margin-top: 1rem; }
.login-lockout.hidden { display: none; }

/* SIDEBAR */
.sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-width); background: var(--bg-secondary); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; z-index: 1000; transition: transform .3s ease; }
.sidebar-header { padding: 1.25rem; display: flex; align-items: center; justify-content: center; gap: .75rem; border-bottom: 1px solid var(--border-color); position: relative; }
.sidebar-logo { font-size: 1.75rem; }
.sidebar-title { font-size: 1rem; font-weight: 700; color: var(--accent); display: none; }
.sidebar-close-btn { display: none; position: absolute; right: 1rem; background: none; border: none; color: var(--text-secondary); font-size: 1.25rem; cursor: pointer; }
.sidebar-nav { flex: 1; padding: .75rem 0; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.nav-item { display: flex; align-items: center; gap: .75rem; padding: .75rem 1.25rem; color: var(--text-secondary); text-decoration: none; font-size: .9rem; font-weight: 500; transition: var(--transition); cursor: pointer; border: none; background: none; width: 100%; text-align: left; }
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { color: var(--accent); background: var(--accent-light); border-right: 3px solid var(--accent); }
.nav-item i { width: 20px; text-align: center; font-size: 1rem; }
.nav-badge { margin-left: auto; background: var(--red); color: white; font-size: .7rem; font-weight: 700; padding: 2px 6px; border-radius: 10px; min-width: 20px; text-align: center; }
.nav-badge.hidden { display: none; }
.sidebar-footer { padding: .75rem; border-top: 1px solid var(--border-color); display: flex; flex-direction: column; gap: 4px; }
.logout-btn { color: var(--red) !important; }
.logout-btn:hover { background: var(--red-light) !important; color: var(--red) !important; }
.theme-toggle { display: flex; align-items: center; justify-content: center; gap: .75rem; padding: .6rem; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-secondary); cursor: pointer; transition: var(--transition); font-size: 1rem; }
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.sidebar-overlay { display: none; position: fixed; inset: 0; z-index: 999; background: rgba(0, 0, 0, .5); backdrop-filter: blur(2px); }

/* MAIN CONTENT */
.main-content { margin-left: var(--sidebar-width); min-height: 100vh; transition: margin .3s ease; }
.topbar { position: sticky; top: 0; z-index: 100; height: var(--topbar-height); background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); display: flex; align-items: center; padding: 0 1.5rem; gap: 1rem; }
.topbar-menu { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.25rem; cursor: pointer; }
.topbar-title { font-size: 1.15rem; font-weight: 700; flex: 1; }
.topbar-actions { display: flex; gap: .5rem; }
.topbar-btn { width: 38px; height: 38px; border-radius: var(--radius-md); background: var(--accent-light); border: none; color: var(--accent); cursor: pointer; font-size: 1rem; transition: var(--transition); }
.topbar-btn:hover { background: var(--accent); color: var(--accent-text); }
.page-container { padding: 1.5rem; max-width: 1600px; margin: 0 auto; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); width: 280px; }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.active { display: block; }
    .sidebar-close-btn { display: block; }
    .main-content { margin-left: 0; }
    .topbar-menu { display: flex; }
    .page-container { padding: 1rem; }
}