/* Base palette + layout adapted from the approved reference
   (A:\Krishna\Student Attendance System\student-attendance-dashboard) */
:root{--navy:#0b1f3a;--navy2:#112e53;--blue:#2563eb;--blue2:#eaf1ff;--bg:#f5f7fb;--card:#fff;--text:#17233c;--muted:#738097;--line:#e6ebf2;--green:#11a36a;--green-bg:#e8f8f1;--red:#e4485d;--red-bg:#fff0f2;--orange:#ee941c;--orange-bg:#fff5e7;--purple:#7c55d9;--purple-bg:#f1ecff;--shadow:0 8px 28px rgba(31,51,84,.08);--rad:0px;--rad-sm:0px;--rad-lg:0px;}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;font-family:'Inter',Arial,sans-serif;background:var(--bg);color:var(--text);font-size:16px;overflow-x:hidden;max-width:100vw}
a{color:inherit}
button,input,select,textarea{font:inherit}
button{cursor:pointer}

/* ===== Sidebar (white theme) ===== */
.premium-sidebar{position:fixed;inset:0 auto 0 0;width:252px;padding:20px 16px;background:#fff;color:var(--text);display:flex;flex-direction:column;z-index:1000;overflow:auto;border-right:1px solid var(--line)}
.sb-brand{display:flex;gap:12px;align-items:center;padding:2px 6px 19px;border-bottom:1px solid var(--line)}
.sb-brand-stacked{flex-direction:column;text-align:center;padding-bottom:16px}
.sb-brand-icon{height:40px;width:40px;display:grid;place-items:center;font-size:20px;font-weight:800;color:var(--blue);flex-shrink:0}
.sb-brand-icon-lg{height:64px;width:160px;max-width:100%;font-size:28px}
.sb-brand-icon img{max-width:160px;max-height:64px;width:auto;height:auto;object-fit:contain}
.sb-brand-title{font-size:16px;font-weight:800;color:var(--text);line-height:1.3}
.sb-brand-sub{font-size:12px;color:var(--muted);margin-top:3px}
.sb-nav{display:flex;flex-direction:column;gap:3px;margin-top:6px}
.sb-nav-title{font-size:11px;letter-spacing:1.5px;color:#9aa8bb;padding:12px 8px 4px;text-transform:uppercase;font-weight:700}
.sb-nav-title:first-child{padding-top:6px}
.sb-link{border:0;background:transparent;color:#526077;border-radius:6px;padding:11px 12px;text-align:left;display:flex;align-items:center;gap:12px;font-size:12px;font-weight:600;text-decoration:none;transition:.2s}
.sb-link i{width:18px;text-align:center;font-size:16px}
.sb-link:hover{background:var(--bg);color:var(--text)}
.sb-link.active{background:linear-gradient(90deg,#236adf,#2b80ef);color:#fff;box-shadow:0 6px 14px rgba(16,91,205,.25)}
.sb-link .sb-badge{margin-left:auto;background:var(--blue);color:#fff;border-radius:0;padding:2px 7px;font-size:11px;font-weight:800}
.sb-link.active .sb-badge{background:rgba(255,255,255,.28)}
.sb-foot{margin-top:auto}
.sb-cta{text-align:center;padding:18px 14px;border:1px solid var(--line);background:linear-gradient(180deg,var(--blue2),#f8fbff);border-radius:0;margin-bottom:14px}
.sb-cta-icon{margin:auto;width:50px;height:50px;border-radius:0;background:#fff;color:var(--green);display:grid;place-items:center;font-size:24px;font-weight:800;box-shadow:0 3px 10px rgba(31,51,84,.08)}
.sb-cta h3{margin:12px 0 5px;font-size:15px;color:var(--text)}
.sb-cta p{margin:0 0 13px;color:var(--muted);font-size:12px;line-height:1.6}
.sb-user-mini{display:flex;align-items:center;gap:9px;border-top:1px solid var(--line);padding:16px 3px 0}
.sb-user-info{min-width:0;flex:1}
.sb-user-name{font-size:13px;color:var(--text);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-user-email{font-size:11px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-logout-btn{margin-left:auto;border:0;background:var(--red-bg);color:var(--red);width:26px;height:26px;border-radius:6px}
.avatar{width:35px;height:35px;border-radius:50%;background:linear-gradient(135deg,#2a7eff,#5a3ec8);display:grid;place-items:center;color:#fff;font-weight:700;font-size:13px;flex:0 0 auto}
.avatar.xl{width:54px;height:54px;font-size:17px}

/* ===== Main / Topbar ===== */
.main-wrap{margin-left:252px;min-height:100vh}
.topbar{height:70px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 26px 0 3px;position:sticky;top:0;z-index:99;gap:12px}
.icon-btn{border:0;background:transparent;color:#435069;font-size:20px;position:relative;width:34px;height:34px;border-radius:7px;display:flex;align-items:center;justify-content:center}
.icon-btn:hover{background:var(--bg)}
.topbar-left{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.topbar-left .kicker{font-size:13px;color:var(--muted)}
.topbar-left .greet{font-size:15px;font-weight:800;color:var(--text)}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.date-chip{height:38px;border:1px solid var(--line);border-radius:0;display:flex;align-items:center;gap:8px;padding:0 14px;color:#46536a;font-size:13px;font-weight:600;white-space:nowrap}
.date-chip i{color:var(--blue);font-size:13px}
.uav{width:35px;height:35px;border-radius:50%;background:linear-gradient(135deg,#2a7eff,#5a3ec8);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;flex-shrink:0}

/* ===== Page content / greeting header ===== */
.page-content{padding:24px 26px 34px 3px}
.greet-banner{margin-bottom:20px}
.greet-banner-title{margin:0;font-size:26px;font-weight:800;color:var(--text)}
.greet-banner-sub{margin:5px 0 0;color:var(--muted);font-size:13px}

/* ===== KPI cards ===== */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:15px}
.stats-grid-compact{grid-template-columns:repeat(auto-fit,minmax(140px,160px))}
.st{background:#fff;border:1px solid var(--line);border-radius:0;padding:16px;box-shadow:0 3px 12px rgba(31,51,84,.04);min-width:0;position:relative;transition:.2s}
.st:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.st-icon{width:38px;height:38px;border-radius:0;display:grid;place-items:center;font-size:19px;color:#fff;margin-bottom:13px}
.st-val{display:block;font-size:26px;font-weight:800;color:var(--text);margin-top:5px;line-height:1}
.st-lbl{display:block;color:var(--muted);font-size:12px;margin-top:0}
.st-delta{font-size:11px;color:var(--green);font-weight:700;margin-top:8px}
.st-compact{padding:11px 12px}
.st-compact .st-icon{width:28px;height:28px;font-size:13px;margin-bottom:8px}
.st-compact .st-val{font-size:19px;margin-top:3px}
.st-compact .st-lbl{font-size:10.5px}
.st-compact .st-delta{font-size:9.5px;margin-top:5px}
.st-delta.down{color:var(--red)}
.st-link{position:absolute;inset:0}
.st-navy .st-icon{background:var(--blue2);color:var(--blue)}
.st-teal .st-icon{background:var(--green-bg);color:var(--green)}
.st-gold .st-icon{background:var(--orange-bg);color:var(--orange)}
.st-coral .st-icon{background:var(--red-bg);color:var(--red)}
.st-coral.st-idle .st-icon{background:#f1f5f9;color:#94a3b8}
.st-purple .st-icon{background:var(--purple-bg);color:var(--purple)}

/* Compact, colored-background stat card (mini KPI rows inside a card, e.g. Reports summary) */
.st-mini{padding:10px 12px;min-height:0;border:0}
.st-mini .st-icon{width:26px;height:26px;font-size:12px;margin-bottom:6px;color:#fff}
.st-mini .st-val{font-size:18px;margin-top:2px}
.st-mini .st-lbl{font-size:10px}
.st-mini.st-navy{background:var(--blue2)}
.st-mini.st-navy .st-icon{background:var(--blue)}
.st-mini.st-teal{background:var(--green-bg)}
.st-mini.st-teal .st-icon{background:var(--green)}
.st-mini.st-gold{background:var(--orange-bg)}
.st-mini.st-gold .st-icon{background:var(--orange)}
.st-mini.st-coral{background:var(--red-bg)}
.st-mini.st-coral .st-icon{background:var(--red)}

/* ===== Panels / cards ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:0;box-shadow:0 3px 15px rgba(31,51,84,.04);margin-bottom:14px;overflow:hidden}
.card-pad{padding:16px}
.sec-hdr{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 13px;gap:10px;flex-wrap:wrap}
.sec-title{font-size:15px;font-weight:700;color:var(--text);margin:0;display:flex;align-items:center;gap:8px}
.sec-title i{font-size:15px;color:var(--blue)}
.sec-link{font-size:11px;font-weight:700;color:var(--blue);text-decoration:none;background:none;border:0}

/* ===== Lists ===== */
.list-row{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--line)}
.list-row:last-child{border:0}
.time-box{width:56px;text-align:center;color:var(--blue);font-size:12px;font-weight:700;flex-shrink:0}
.time-box small{display:block;color:var(--muted);font-size:10px;margin-top:4px;font-weight:500}
.row-content{min-width:0;flex:1}
.row-content strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row-content span{display:block;font-size:11.5px;color:var(--muted);margin-top:4px}

/* ===== Pills / badges / status ===== */
.badge,.pill{display:inline-block;border-radius:0;padding:4px 9px;font-size:11px;font-weight:700;white-space:nowrap}
.badge.active,.pill.green{background:var(--green-bg);color:var(--green)}
.badge.inactive,.pill.gray{background:#eef2f7;color:#5f6d80}
.pill.red{background:var(--red-bg);color:var(--red)}
.pill.orange{background:var(--orange-bg);color:var(--orange)}
.pill.blue{background:var(--blue2);color:var(--blue)}
.pill.purple{background:var(--purple-bg);color:var(--purple)}
.status-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px;vertical-align:middle}
.status-dot.dot-live{background:var(--green);box-shadow:0 0 0 3px var(--green-bg)}
.status-dot.dot-upcoming{background:var(--blue);box-shadow:0 0 0 3px var(--blue2)}
.status-dot.dot-past{background:#9aa8bb;box-shadow:0 0 0 3px #eef2f7}
.badge-live{background:var(--red);color:#fff;display:inline-flex;align-items:center;gap:6px;animation:liveBlink 1.4s ease-in-out infinite}
.badge-live::before{content:'';width:7px;height:7px;background:#fff;border-radius:50%;display:inline-block;animation:liveDot 1.4s ease-in-out infinite}
@keyframes liveBlink{0%,100%{box-shadow:0 0 0 0 rgba(228,72,93,.55)}50%{box-shadow:0 0 0 7px rgba(228,72,93,0)}}
@keyframes liveDot{0%,100%{opacity:1}50%{opacity:.25}}
.badge-done{background:var(--blue2);color:var(--blue)}
.badge-scheduled{background:var(--orange-bg);color:var(--orange)}
.badge-cancelled{background:var(--red-bg);color:var(--red)}

.attend-count{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:12.5px;color:var(--blue);text-decoration:none;padding:5px 11px;background:var(--blue2);border-radius:0;background:var(--green);animation:attendPulse 1.4s ease-in-out infinite}
@keyframes attendPulse{0%,100%{box-shadow:0 0 0 0 rgba(17,163,106,.5)}50%{box-shadow:0 0 0 6px rgba(17,163,106,0)}}

/* ===== Forms ===== */
label{display:block;font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px}
input,select{width:100%;border:1px solid var(--line);border-radius:0;padding:10px 12px;font-size:13px;color:var(--text);margin-bottom:14px;outline:none;background:#fff}
input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.field-required::after{content:' *';color:var(--red)}
.field-error{color:var(--red);font-size:12px;margin-top:-10px;margin-bottom:12px;display:block}

/* ===== Table (clean SaaS data-table, sortable-header style) ===== */
.table-wrap{overflow:auto;border-radius:8px}
table.data-table,table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);font-size:12px;vertical-align:middle}
th{background:#fff;color:#1f2a3d;font-size:12px;font-weight:700;white-space:nowrap;border-bottom:2px solid var(--line)}
th a{color:inherit;text-decoration:none;display:inline-flex;align-items:center;gap:5px}
th a{color:#1f2a3d}
tbody tr:nth-child(even) td{background:#fafbfd}
tr:hover td{background:var(--blue2)}
tr:last-child td{border-bottom:0}
td:first-child,th:first-child{font-weight:700;color:var(--text)}

/* ===== Buttons ===== */
.btn,.primary-btn{border:0;border-radius:7px;padding:10px 16px;font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,#2a7df4,#1d62d6);box-shadow:0 5px 12px rgba(37,99,235,.22);display:inline-flex;align-items:center;gap:7px;text-decoration:none;transition:.15s}
.btn:hover{opacity:.9;color:#fff}
.btn.secondary,.secondary-btn{background:#fff;color:#39465c;border:1px solid var(--line);box-shadow:none}
.btn.danger,.danger-btn{background:var(--red);color:#fff;box-shadow:none}
.btn-sm{padding:7px 12px;font-size:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn .spinner{width:12px;height:12px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.full{width:100%;justify-content:center}

.error{background:var(--red-bg);color:#c0293c;padding:11px 16px;border-radius:0;margin-bottom:14px;font-size:13px}
.success{background:var(--green-bg);color:#0b7a4e;padding:11px 16px;border-radius:0;margin-bottom:14px;font-size:13px}
.login-wrap{max-width:400px;margin:100px auto;padding:0 16px}
.login-wrap h1{text-align:center;font-size:22px;margin-bottom:22px;color:var(--text)}

/* ===== Component layer (toast/modal/drawer/dropdown/skeleton/empty) ===== */
#toastStack{position:fixed;bottom:24px;right:24px;z-index:5000;display:flex;flex-direction:column;gap:10px}
.toast{background:var(--navy);color:#fff;border-radius:0;padding:12px 16px;display:flex;align-items:center;gap:9px;min-width:230px;max-width:360px;font-size:13px;font-weight:600;box-shadow:var(--shadow);animation:toastIn .25s ease}
.toast.toast-error{background:var(--red)}
.toast.toast-leaving{animation:toastOut .2s ease forwards}
@keyframes toastIn{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}
@keyframes toastOut{to{transform:translateY(20px);opacity:0}}

.modal-overlay{position:fixed;inset:0;background:rgba(7,21,39,.58);z-index:4000;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:opacity .2s}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal-box{background:#fff;border-radius:0;box-shadow:0 25px 80px rgba(0,0,0,.25);width:100%;max-width:420px;transform:translateY(10px) scale(.98);transition:transform .2s}
.modal-overlay.open .modal-box{transform:translateY(0) scale(1)}
.modal-hdr{padding:18px 20px;border-bottom:1px solid var(--line);font-weight:800;font-size:17px}
.modal-body{padding:20px;font-size:13.5px;color:#46536a}
.modal-ftr{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}

.drawer-overlay{position:fixed;inset:0;background:rgba(7,21,39,.45);z-index:4000;opacity:0;pointer-events:none;transition:opacity .2s}
.drawer-overlay.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:420px;max-width:92vw;background:#fff;box-shadow:0 25px 80px rgba(0,0,0,.25);z-index:4001;transform:translateX(100%);transition:transform .25s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column}
.drawer.open{transform:translateX(0)}
.drawer-hdr{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-weight:800;font-size:16px}
.drawer-close{background:#f1f4f8;border:0;width:30px;height:30px;border-radius:7px;cursor:pointer;color:var(--muted)}
.drawer-body{padding:20px;overflow-y:auto;flex:1}

.dd-wrap{position:relative;display:inline-block}
.dd-trigger{background:#f1f4f8;border:0;width:28px;height:28px;border-radius:7px;cursor:pointer;color:var(--muted)}
.dd-menu{position:absolute;right:0;top:calc(100% + 4px);background:#fff;border-radius:0;box-shadow:var(--shadow);border:1px solid var(--line);min-width:150px;z-index:200;display:none;overflow:hidden}
.dd-menu.open{display:block}
.dd-item{display:flex;align-items:center;gap:8px;padding:9px 13px;font-size:13px;font-weight:600;color:var(--text);text-decoration:none;cursor:pointer;background:none;border:0;width:100%;text-align:left}
.dd-item:hover{background:#f8fafc}
.dd-item.danger{color:var(--red)}

.skel{background:linear-gradient(90deg,#f1f5f9 25%,#e2e8f0 37%,#f1f5f9 63%);background-size:400% 100%;animation:skelShimmer 1.4s ease infinite;border-radius:0;text-align:center}
.empty-state-icon{width:56px;height:56px;border-radius:50%;background:#f1f4f8;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:24px;color:#9aa8bb}
.empty-state-title{font-weight:700;font-size:16px;color:var(--text);margin-bottom:4px}
.empty-state-sub{font-size:12.5px;color:var(--muted);max-width:320px;margin:0 auto 18px}

.bulk-bar{display:none;align-items:center;gap:12px;padding:10px 16px;background:var(--blue2);border-bottom:1px solid var(--line);font-size:13px;font-weight:700;color:var(--navy)}
.bulk-bar.open{display:flex}

/* Dashboard grid + panels (reference-matched) */
.dashboard-grid{display:grid;grid-template-columns:1.45fr 1fr .9fr;gap:14px}
.summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.summary-item{border-radius:0;padding:13px}
.summary-item span{display:block;font-size:11px;color:var(--muted)}
.summary-item strong{font-size:22px;display:block;margin-top:7px}
.summary-item.green{background:var(--green-bg)}
.summary-item.red{background:var(--red-bg)}
.summary-item.orange{background:var(--orange-bg)}
.summary-item.purple{background:var(--purple-bg)}
.quick-actions{display:flex;flex-direction:column;gap:8px}

@media(max-width:1250px){.stats-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:1fr 1fr}}
@media(max-width:900px){.premium-sidebar{transform:translateX(-100%);transition:.25s}.premium-sidebar.open{transform:translateX(0)}.main-wrap{margin-left:0}.dashboard-grid{grid-template-columns:1fr}}
@media(max-width:650px){.page-content{padding:17px}.topbar{padding:0 13px}.stats-grid{grid-template-columns:1fr}.drawer{width:100%;max-width:100%}.date-chip{display:none}.topbar-right{gap:6px}}
@media(max-width:480px){.topbar-left .greet{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}

/* Live lecture tracking */
.live-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}
.lecture-card-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.progress-track{height:7px;background:#edf2f7;border-radius:0;margin-top:7px;overflow:hidden}
.progress-track i{display:block;height:100%;background:var(--green);border-radius:0;transition:width .3s}
.lecture-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-top:12px}
.lecture-stats div{text-align:center;background:#fafbfd;border:1px solid var(--line);border-radius:0;padding:9px 4px}
.lecture-stats strong{display:block;font-size:16px;margin-top:4px}
.lecture-stats span{font-size:10px;color:var(--muted)}

/* Reports - calendar-wise attendance grid */
.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.calendar-dow{font-size:10px;font-weight:700;color:var(--muted);text-align:center;text-transform:uppercase;padding-bottom:4px}
.calendar-cell{border:1px solid var(--line);border-radius:6px;padding:8px 6px;min-height:64px;cursor:pointer;transition:.15s;display:flex;flex-direction:column;gap:4px;align-items:center;text-align:center}
.calendar-cell:hover{border-color:var(--blue);box-shadow:0 2px 8px rgba(37,99,235,.12)}
.calendar-cell-empty{border:0;cursor:default}
.calendar-cell-empty:hover{box-shadow:none}
.calendar-cell-num{font-size:12px;font-weight:700;color:var(--text)}
.calendar-cell-sub{font-size:8.5px;color:var(--muted)}
.calendar-cell.cell-green{background:var(--green-bg);border-color:rgba(17,163,106,.25)}
.calendar-cell.cell-orange{background:var(--orange-bg);border-color:rgba(238,148,28,.25)}
.calendar-cell.cell-red{background:var(--red-bg);border-color:rgba(228,72,93,.25)}
.calendar-cell.cell-blue{background:var(--blue2);border-color:rgba(37,99,235,.25)}
.calendar-cell.cell-gray{background:#fafbfd}
@media(max-width:650px){.calendar-grid{gap:3px}.calendar-cell{min-height:52px;padding:5px 3px}}

/* Reports - tab pills */
.report-tab{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:6px;font-size:12px;font-weight:700;color:var(--muted);text-decoration:none;transition:.15s}
.report-tab:hover{color:var(--text)}
.report-tab.active{background:#fff;color:var(--blue);box-shadow:0 2px 6px rgba(31,51,84,.08)}

/* Dashboard - hero goal bar + metric rings */
.goal-bar-track{height:34px;background:var(--bg);border-radius:17px;position:relative;overflow:hidden}
.goal-bar-fill{height:100%;background:linear-gradient(90deg,#ee941c,#f5c542,#11a36a);border-radius:17px 0 0 17px;display:flex;align-items:center;padding-left:14px;font-size:11px;font-weight:700;color:#fff;white-space:nowrap;transition:width .4s}
.goal-bar-marker{position:absolute;top:-4px;bottom:-4px;width:2px;background:var(--navy);opacity:.4}
.metric-ring{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.metric-ring-inner{width:50px;height:50px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:var(--text)}