:root {
    --navy: #0f2540;
    --navy-2: #16335c;
    --gold: #d4a437;
    --bg: #f4f6fa;
    --card: #ffffff;
    --muted: #6b7a90;
    --ok: #1e9e6a;
    --warn: #e3a008;
    --risk: #e23d3d;
}

* { font-family: "Segoe UI", Tahoma, "Cairo", sans-serif; }
body { background: var(--bg); color: #1c2733; margin: 0; }

/* ---------- App shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 250px; background: var(--navy); color: #cdd6e4;
    display: flex; flex-direction: column; position: fixed; inset-inline-start: 0; top: 0; bottom: 0;
    z-index: 1040; transition: transform .25s;
}
.sidebar .brand {
    display: flex; align-items: center; gap: 10px; padding: 20px 18px;
    font-size: 1.25rem; font-weight: 700; color: #fff; border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar .brand i { color: var(--gold); font-size: 1.6rem; }
.sidebar .brand small { color: var(--gold); font-weight: 500; font-size: .8rem; }
.sidebar .nav { padding: 12px 8px; gap: 2px; }
.sidebar .nav-link {
    color: #b7c2d4; border-radius: 10px; padding: 11px 14px; display: flex; align-items: center; gap: 11px;
    font-size: .95rem; transition: all .15s;
}
.sidebar .nav-link i { font-size: 1.1rem; width: 20px; text-align: center; }
.sidebar .nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar .nav-link.active { background: var(--gold); color: var(--navy); font-weight: 600; }

.main { flex: 1; margin-inline-start: 250px; display: flex; flex-direction: column; min-width: 0; }

.topbar {
    background: var(--card); padding: 14px 24px; display: flex; align-items: center; gap: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,.05); position: sticky; top: 0; z-index: 1030;
}
.topbar .page-title { font-size: 1.25rem; font-weight: 700; margin: 0; color: var(--navy); flex: 1; }
.topbar .user-box { display: flex; align-items: center; gap: 10px; }

.content { padding: 24px; }

/* ---------- Cards / stats ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat-card {
    background: var(--card); border-radius: 14px; padding: 18px 20px; box-shadow: 0 2px 10px rgba(16,37,64,.05);
    display: flex; align-items: center; gap: 16px; border: 1px solid #eef1f6;
}
.stat-card .ico { width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center; font-size: 1.5rem; color: #fff; flex-shrink: 0; }
.stat-card .val { font-size: 1.7rem; font-weight: 700; line-height: 1; color: var(--navy); }
.stat-card .lbl { color: var(--muted); font-size: .85rem; margin-top: 4px; }
.ico.b1 { background: linear-gradient(135deg,#16335c,#2a5a9e); }
.ico.b2 { background: linear-gradient(135deg,#1e9e6a,#3fcf8e); }
.ico.b3 { background: linear-gradient(135deg,#d4a437,#f0c869); }
.ico.b4 { background: linear-gradient(135deg,#e23d3d,#ff7676); }
.ico.b5 { background: linear-gradient(135deg,#6f42c1,#a47ee6); }

.panel { background: var(--card); border-radius: 14px; padding: 20px; box-shadow: 0 2px 10px rgba(16,37,64,.05); border: 1px solid #eef1f6; margin-bottom: 20px; }
.panel h2 { font-size: 1.05rem; font-weight: 700; color: var(--navy); margin: 0 0 16px; display: flex; align-items: center; gap: 8px; }
.panel h2 i { color: var(--gold); }

table.table { margin: 0; }
.table thead th { color: var(--muted); font-size: .8rem; text-transform: uppercase; font-weight: 600; border-bottom: 2px solid #eef1f6; }
.table td { vertical-align: middle; }

.prog { height: 8px; border-radius: 6px; background: #eef1f6; overflow: hidden; min-width: 90px; }
.prog > span { display: block; height: 100%; background: var(--ok); }
.prog.warn > span { background: var(--warn); }
.prog.risk > span { background: var(--risk); }

.chip { font-size: .72rem; padding: 3px 9px; border-radius: 20px; font-weight: 600; }
.chip.risk { background: #fdecec; color: var(--risk); }
.chip.ok { background: #e7f7ef; color: var(--ok); }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, var(--navy), var(--navy-2)); padding: 20px; }
.login-card { background: #fff; border-radius: 18px; padding: 38px 34px; width: 100%; max-width: 400px; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.login-card .brand { text-align: center; margin-bottom: 26px; }
.login-card .brand i { font-size: 2.6rem; color: var(--gold); }
.login-card .brand h1 { font-size: 1.4rem; font-weight: 700; color: var(--navy); margin: 8px 0 0; }
.login-card .brand p { color: var(--muted); font-size: .9rem; margin: 4px 0 0; }
.btn-gold { background: var(--gold); border: none; color: var(--navy); font-weight: 700; }
.btn-gold:hover { background: #c2952f; color: var(--navy); }

/* ---------- Nav badge + toast ---------- */
.nav-badge { background: var(--risk); color: #fff; border-radius: 20px; font-size: .7rem; font-weight: 700; padding: 1px 7px; margin-inline-start: auto; }
.sidebar .nav-link { position: relative; }
.chat-toast { background: var(--navy); color: #fff; border-inline-start: 4px solid var(--gold); border-radius: 10px; padding: 10px 14px; box-shadow: 0 6px 24px rgba(0,0,0,.25); max-width: 320px; animation: slideIn .2s; }
.chat-toast strong { color: var(--gold); display: block; margin-bottom: 2px; font-size: .9rem; }
.chat-toast div { font-size: .85rem; color: #dfe6f0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@keyframes slideIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; } }

/* ---------- Chat ---------- */
.chat-wrap { display: flex; height: calc(100vh - 130px); overflow: hidden; }
.chat-list { width: 280px; border-inline-end: 1px solid #eef1f6; display: flex; flex-direction: column; overflow-y: auto; flex-shrink: 0; }
.chat-list-head { padding: 16px; font-weight: 700; color: var(--navy); border-bottom: 1px solid #eef1f6; }
.chat-list-head i { color: var(--gold); }
.chat-list-item { display: flex; align-items: center; gap: 10px; padding: 12px 14px; color: inherit; text-decoration: none; border-bottom: 1px solid #f4f6fa; transition: background .15s; }
.chat-list-item:hover { background: #f7f9fc; }
.chat-list-item.active { background: #eef3fb; border-inline-start: 3px solid var(--gold); }
.chat-list-item .avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; flex-shrink: 0; }
.chat-list-item .meta { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.chat-list-item .meta .t { font-weight: 600; color: var(--navy); }
.chat-list-item .meta .s { font-size: .78rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-head { padding: 14px 18px; border-bottom: 1px solid #eef1f6; font-weight: 600; color: var(--navy); }
.chat-head i { color: var(--gold); }
.chat-empty { flex: 1; display: grid; place-items: center; color: var(--muted); text-align: center; }
.chat-empty i { font-size: 2.5rem; display: block; margin-bottom: 8px; color: #cdd6e4; }
.chat-messages { flex: 1; overflow-y: auto; padding: 18px; background: #f7f9fc; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 72%; align-self: flex-start; }
.msg.mine { align-self: flex-end; text-align: start; }
.msg .sender { font-size: .72rem; color: var(--muted); margin-bottom: 2px; }
.msg .bubble { background: #fff; border: 1px solid #e7ecf3; padding: 9px 13px; border-radius: 14px; border-top-inline-start-radius: 4px; color: #1c2733; word-wrap: break-word; white-space: pre-wrap; }
.msg.mine .bubble { background: var(--gold); border-color: var(--gold); color: var(--navy); border-top-inline-start-radius: 14px; border-top-inline-end-radius: 4px; }
.msg .time { font-size: .68rem; color: #aab; margin-top: 2px; }
.chat-input { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid #eef1f6; }

/* ---------- Plan timeline (student) ---------- */
.plan-timeline { display: flex; flex-direction: column; }
.plan-row { display: flex; align-items: center; gap: 12px; padding: 12px 4px; border-bottom: 1px solid #f1f4f9; }
.plan-row:last-child { border-bottom: none; }
.plan-row > i { font-size: 1.3rem; flex-shrink: 0; }
.plan-row.done > i { color: #1f9d57; }
.plan-row.current > i { color: var(--gold); }
.plan-row.upcoming > i { color: #c4cdda; }
.plan-row.done .plan-body .fw-semibold { color: #6b7a90; }
.plan-body { flex: 1; min-width: 0; }
.plan-meta { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.plan-row.current { background: #fffdf5; border-radius: 8px; }

@media (max-width: 991px) {
    .sidebar { transform: translateX(100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-inline-start: 0; }
    .chat-list { width: 130px; }
}