/* =========================================================
   Lecture Notes Management Portal - Custom Styles
   Soft, calm palette layered on top of Bootstrap 5
   ========================================================= */

:root {
    --lnp-primary: #4C6FFF;
    --lnp-primary-dark: #3955D8;
    --lnp-accent: #35C4B6;
    --lnp-bg: #F6F8FC;
    --lnp-card-bg: #FFFFFF;
    --lnp-text: #2B2E4A;
    --lnp-muted: #7B819A;
    --lnp-border: #E7EAF3;
    --lnp-danger: #F16A6A;
    --lnp-success: #35C48A;
    --lnp-warning: #F5B94F;
}

body {
    background-color: var(--lnp-bg);
    color: var(--lnp-text);
    font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ---------- Navbar ---------- */
.lnp-navbar {
    background: linear-gradient(135deg, var(--lnp-primary) 0%, var(--lnp-primary-dark) 100%);
    box-shadow: 0 2px 10px rgba(76, 111, 255, 0.15);
}
.lnp-navbar .navbar-brand {
    font-weight: 700;
    color: #fff !important;
    letter-spacing: 0.3px;
}
.lnp-navbar .nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
}
.lnp-navbar .nav-link:hover {
    color: #fff !important;
}
.lnp-navbar .badge-role {
    background: rgba(255,255,255,0.18);
    color: #fff;
    font-weight: 500;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
}

/* ---------- Cards ---------- */
.lnp-card {
    background: var(--lnp-card-bg);
    border: 1px solid var(--lnp-border);
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(43, 46, 74, 0.05);
}
.lnp-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--lnp-border);
    font-weight: 600;
    border-radius: 14px 14px 0 0 !important;
}

/* ---------- Stat widgets ---------- */
.lnp-stat {
    border-radius: 14px;
    padding: 22px;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.lnp-stat h2 { font-weight: 700; margin-bottom: 0; }
.lnp-stat span { opacity: 0.9; font-size: 0.9rem; }
.lnp-stat.bg-primary-soft { background: linear-gradient(135deg, #4C6FFF, #6F8CFF); }
.lnp-stat.bg-accent-soft { background: linear-gradient(135deg, #35C4B6, #4FE0D2); }
.lnp-stat.bg-warning-soft { background: linear-gradient(135deg, #F5B94F, #F7CB7B); }
.lnp-stat.bg-danger-soft { background: linear-gradient(135deg, #F16A6A, #F79999); }
.lnp-stat i { font-size: 2.2rem; opacity: 0.35; position: absolute; right: 16px; top: 16px; }

/* ---------- Buttons ---------- */
.btn-lnp-primary {
    background-color: var(--lnp-primary);
    border-color: var(--lnp-primary);
    color: #fff;
}
.btn-lnp-primary:hover {
    background-color: var(--lnp-primary-dark);
    border-color: var(--lnp-primary-dark);
    color: #fff;
}
.btn-lnp-accent {
    background-color: var(--lnp-accent);
    border-color: var(--lnp-accent);
    color: #fff;
}
.btn-lnp-accent:hover {
    filter: brightness(0.95);
    color: #fff;
}

/* ---------- Auth pages ---------- */
.lnp-auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4C6FFF 0%, #35C4B6 100%);
    padding: 24px;
}
.lnp-auth-card {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 20px 50px rgba(30, 40, 90, 0.25);
    max-width: 430px;
    width: 100%;
    padding: 40px 36px;
}
.lnp-auth-logo {
    width: 62px;
    height: 62px;
    border-radius: 16px;
    background: linear-gradient(135deg, #4C6FFF, #35C4B6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.6rem;
    margin: 0 auto 14px;
}

/* ---------- Tables ---------- */
.table-lnp thead {
    background-color: #F0F3FC;
}
.table-lnp thead th {
    border-bottom: none;
    color: var(--lnp-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

/* ---------- Badges for roles/status ---------- */
.badge-admin { background-color: #4C6FFF; }
.badge-lecturer { background-color: #35C4B6; }
.badge-student { background-color: #F5B94F; color: #4a3200; }

/* ---------- Footer ---------- */
.lnp-footer {
    color: var(--lnp-muted);
    font-size: 0.85rem;
    padding: 24px 0;
}

/* ---------- Empty state ---------- */
.lnp-empty {
    text-align: center;
    padding: 50px 20px;
    color: var(--lnp-muted);
}
.lnp-empty i { font-size: 2.8rem; opacity: 0.35; margin-bottom: 12px; display: block; }