:root{font-family:Inter,Segoe UI,Arial,sans-serif;color:#172033;background:#f4f7fb;line-height:1.5}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;flex-direction:column}.topbar{background:#fff;border-bottom:1px solid #dfe6ef;padding:16px clamp(20px,5vw,72px);display:flex;justify-content:space-between;align-items:center}.brand{font-weight:800;color:#123d6a;text-decoration:none}.topbar nav{display:flex;gap:18px;align-items:center}.topbar a,.link-button{color:#245987;text-decoration:none}.inline{display:inline}.link-button{border:0;background:none;cursor:pointer;font:inherit;padding:0}.container{width:min(1100px,calc(100% - 32px));margin:42px auto;flex:1}.hero{padding:54px 0}.hero h1{font-size:clamp(2rem,5vw,4rem);max-width:900px;line-height:1.05;margin:12px 0 20px}.hero p{font-size:1.15rem;max-width:760px;color:#536174}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:#3976a8}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.button{display:inline-block;border:1px solid #245987;background:#fff;color:#245987;border-radius:9px;padding:11px 18px;text-decoration:none;font-weight:700;cursor:pointer}.button.primary{background:#245987;color:#fff}.cards{display:grid;gap:18px}.cards.three{grid-template-columns:repeat(3,1fr)}.cards article,.panel,.status-card{background:#fff;border:1px solid #dfe6ef;border-radius:14px;padding:24px;box-shadow:0 4px 18px rgba(20,45,75,.05)}.panel{max-width:850px;margin:auto}.panel.narrow{max-width:520px}.grid{display:grid;gap:16px}.grid.two{grid-template-columns:1fr 1fr}label{display:block;font-weight:700;margin:14px 0}input,select,textarea{width:100%;margin-top:6px;border:1px solid #bdc9d8;border-radius:8px;padding:11px;font:inherit;background:#fff}.check{display:flex;gap:8px;align-items:center;font-weight:400}.check input{width:auto;margin:0}.alert{padding:14px 18px;border-radius:8px;margin-bottom:20px}.alert.success{background:#e8f7ee;color:#17663a}.alert.error{background:#fff0f0;color:#8b2222}.alert ul{margin:0}.dashboard{max-width:850px;margin:auto}.status-card{margin-top:24px;display:flex;justify-content:space-between;gap:16px}footer{text-align:center;padding:28px;color:#718096;font-size:.9rem}@media(max-width:720px){.cards.three,.grid.two{grid-template-columns:1fr}.hero{padding:28px 0}.status-card{flex-direction:column}.topbar{padding:14px 16px}}

/* === Application shell / collapsible sidebar === */
:root{--sidebar-width:260px;--sidebar-collapsed:76px;--navy:#102a43;--navy-2:#173f66;--accent:#2b6fa6;--surface:#fff;--line:#dfe7ef;--muted:#6b7c93}
.authenticated-shell{display:block;background:#f4f7fb}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);background:linear-gradient(180deg,#102a43 0%,#173f66 100%);color:#fff;z-index:50;display:flex;flex-direction:column;box-shadow:8px 0 30px rgba(16,42,67,.12);transition:width .22s ease,transform .22s ease}.sidebar-head{height:74px;display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;min-width:0;flex:1}.brand-mark{width:38px;height:38px;border-radius:12px;background:#fff;color:#173f66;display:grid;place-items:center;font-weight:900;flex:0 0 auto}.brand-text{font-weight:800;white-space:nowrap;overflow:hidden}.sidebar-toggle{width:34px;height:34px;border:0;border-radius:9px;background:rgba(255,255,255,.09);color:#fff;display:grid;place-items:center;cursor:pointer}.sidebar-toggle svg,.mobile-menu-button svg,.side-icon svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.sidebar-nav{padding:18px 10px;display:flex;flex-direction:column;gap:5px;overflow:auto;flex:1}.side-section-title{font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:#a9bfd3;font-weight:800;padding:16px 12px 7px;white-space:nowrap}.side-link{width:100%;min-height:46px;border:0;border-radius:11px;display:flex;align-items:center;gap:12px;padding:10px 12px;color:#dce9f4;text-decoration:none;background:transparent;font:inherit;text-align:left;cursor:pointer;transition:.16s ease}.side-link:hover{background:rgba(255,255,255,.09);color:#fff}.side-link.active{background:#fff;color:#173f66;font-weight:800;box-shadow:0 7px 18px rgba(0,0,0,.12)}.side-link.disabled{opacity:.48;cursor:default}.side-icon{width:28px;display:grid;place-items:center;flex:0 0 28px}.side-label{white-space:nowrap}.sidebar-footer{padding:12px 10px 18px;border-top:1px solid rgba(255,255,255,.1)}.sidebar-footer form{margin:6px 0 0}.sidebar-user{display:flex;align-items:center;gap:10px;padding:8px}.user-avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#e9f2fa;color:#173f66;font-weight:900;flex:0 0 auto}.user-meta{display:flex;min-width:0;flex-direction:column}.user-meta strong,.user-meta small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-meta small{color:#b8cada}.logout-link{color:#ffd9d9}.app-content{min-height:100vh;margin-left:var(--sidebar-width);display:flex;flex-direction:column;transition:margin-left .22s ease}.app-topbar{height:74px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 30px;position:sticky;top:0;z-index:30}.app-topbar>div{display:flex;flex-direction:column}.app-context{font-size:.72rem;color:#75879b;text-transform:uppercase;letter-spacing:.09em;font-weight:800}.app-container{width:min(1320px,calc(100% - 48px));margin:28px auto;flex:1}.mobile-menu-button{display:none}.sidebar-backdrop{display:none}.sidebar-collapsed .sidebar{width:var(--sidebar-collapsed)}.sidebar-collapsed .app-content{margin-left:var(--sidebar-collapsed)}.sidebar-collapsed .brand-text,.sidebar-collapsed .side-label,.sidebar-collapsed .side-section-title,.sidebar-collapsed .user-meta{display:none}.sidebar-collapsed .sidebar-head{padding:0 10px;justify-content:center}.sidebar-collapsed .sidebar-brand{flex:0}.sidebar-collapsed .sidebar-toggle{position:absolute;right:-15px;background:#fff;color:#173f66;border:1px solid var(--line);box-shadow:0 3px 10px rgba(0,0,0,.1)}.sidebar-collapsed .sidebar-toggle svg{transform:rotate(180deg)}.sidebar-collapsed .side-link{justify-content:center;padding-left:10px;padding-right:10px}.sidebar-collapsed .sidebar-user{justify-content:center}
/* === User management === */
.page-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:22px}.page-title-row h1{margin:.25rem 0 .35rem}.page-title-row p{margin:0;color:#68788c}.metric-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px;margin:18px 0}.metric{background:#fff;border:1px solid var(--line);border-radius:13px;padding:17px}.metric strong{display:block;font-size:1.6rem;color:#153f66}.metric span{font-size:.82rem;color:#6d7e91}.filter-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.filter-tab{padding:8px 13px;border:1px solid #cbd8e4;border-radius:999px;background:#fff;text-decoration:none;color:#315b7d;font-weight:700;font-size:.88rem}.filter-tab.active{background:#173f66;color:#fff;border-color:#173f66}.user-filter{display:grid;grid-template-columns:1fr 220px auto;gap:12px;background:#fff;border:1px solid var(--line);padding:14px;border-radius:14px;margin-bottom:16px}.user-filter label{margin:0}.user-filter .button{align-self:end}.user-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.user-table th{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:#64788d;background:#f7f9fc;text-align:left;padding:12px 14px}.user-table td{padding:13px 14px;border-top:1px solid #edf1f5;vertical-align:middle}.user-name{display:flex;align-items:center;gap:10px}.mini-avatar{width:34px;height:34px;border-radius:10px;background:#e8f0f8;color:#17466e;display:grid;place-items:center;font-weight:900}.role-badge,.state-badge{display:inline-flex;border-radius:999px;padding:4px 9px;font-size:.76rem;font-weight:800}.role-admin{background:#e9e7ff;color:#4538a8}.role-tutor{background:#e3f3ff;color:#14628f}.role-student{background:#eaf7ef;color:#246b44}.state-active{background:#eaf7ef;color:#246b44}.state-pending{background:#fff5d9;color:#8a6410}.state-blocked{background:#ffe7e7;color:#963030}.row-actions{display:flex;gap:6px;justify-content:flex-end;flex-wrap:wrap}.small-action{border:1px solid #c7d5e2;background:#fff;color:#245987;border-radius:8px;padding:6px 9px;font-size:.78rem;font-weight:700;cursor:pointer;text-decoration:none}.small-action.accept{background:#eaf7ef;color:#246b44;border-color:#bfe4cc}.small-action.danger{color:#9a3030;border-color:#efc7c7}.small-action.block{color:#815d0d;border-color:#ead9a3}.user-edit-card{max-width:850px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}.profile-note{padding:12px 14px;background:#f0f5fa;border-radius:10px;color:#53677d;margin-bottom:16px}.pagination-wrap{margin-top:16px}
@media(max-width:1100px){.metric-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:900px){.sidebar{transform:translateX(-100%);width:260px}.app-content,.sidebar-collapsed .app-content{margin-left:0}.sidebar-collapsed .sidebar{width:260px}.sidebar-collapsed .brand-text,.sidebar-collapsed .side-label,.sidebar-collapsed .side-section-title,.sidebar-collapsed .user-meta{display:initial}.sidebar-collapsed .side-link{justify-content:flex-start}.sidebar-collapsed .sidebar-toggle{position:static;background:rgba(255,255,255,.09);color:#fff;border:0;box-shadow:none}.sidebar-collapsed .sidebar-toggle svg{transform:none}.sidebar-mobile-open .sidebar{transform:translateX(0)}.sidebar-mobile-open .sidebar-backdrop{display:block;position:fixed;inset:0;background:rgba(14,30,46,.45);z-index:40}.mobile-menu-button{display:grid;position:fixed;left:14px;top:14px;z-index:35;width:42px;height:42px;place-items:center;border:1px solid var(--line);border-radius:11px;background:#fff;color:#173f66;box-shadow:0 4px 14px rgba(16,42,67,.12)}.app-topbar{padding-left:70px}.app-container{width:min(100% - 28px,1320px)}.user-filter{grid-template-columns:1fr}.user-table{display:block;overflow-x:auto}}@media(max-width:640px){.metric-grid{grid-template-columns:repeat(2,1fr)}.page-title-row{flex-direction:column}.row-actions{justify-content:flex-start}}

/* === FASE C === */
.profile-photo-row{display:flex;gap:22px;align-items:center;margin-bottom:22px}.profile-photo{width:104px;height:104px;border-radius:24px;overflow:hidden;background:#e7eff7;color:#17466e;display:grid;place-items:center;font-size:2rem;font-weight:900;flex:0 0 auto}.profile-photo img{width:100%;height:100%;object-fit:cover}.check-line{display:flex;align-items:center;gap:8px;margin:.6rem 0}.check-line input{width:auto}.request-details summary{display:inline-flex;cursor:pointer}.request-details form{margin-top:10px;min-width:280px;background:#f7f9fc;border:1px solid #dfe7ef;border-radius:12px;padding:12px}.inline-review{display:flex;gap:6px;margin:4px 0;align-items:center}.inline-review input{min-width:150px;padding:6px 8px}.muted-text{color:#7b8999;font-size:.82rem}@media(max-width:640px){.profile-photo-row{align-items:flex-start;flex-direction:column}.inline-review{align-items:stretch;flex-direction:column}}