/* ============================================
   BASE STYLESHEET — shared by landing page, login,
   and as a foundation under portal.css
   ============================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #4338ca;
  --primary-dark: #3730a3;
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
}

body {
  font-family: 'Inter', -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Landing navbar ---------- */
.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar .brand { font-weight: 800; font-size: 20px; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.navbar .brand img { height: 28px; width: 28px; }
.navbar nav a { margin-left: 18px; color: var(--text); font-weight: 500; font-size: 14px; }
.navbar .pill { background: var(--primary); color: #fff !important; padding: 8px 16px; border-radius: 999px; }

/* ---------- Layout ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 30px 20px; }
.container-narrow { max-width: 440px; margin: 0 auto; padding: 30px 20px; }

.hero {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  padding: 80px 20px;
  text-align: center;
}
.hero h1 { font-size: 38px; margin-bottom: 14px; font-weight: 800; }
.hero p { opacity: .92; font-size: 17px; max-width: 600px; margin: 0 auto 26px; }
.hero .btn-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 40px 0; }
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 26px; transition: transform .15s, box-shadow .15s; }
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(67,56,202,.1); }
.feature-card .icon { font-size: 30px; margin-bottom: 10px; }
.feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--muted); }

.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 30px 0; }
.role-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 30px; text-align: center; transition: transform .15s, box-shadow .15s;
}
.role-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(67,56,202,.1); }
.role-card .icon { font-size: 36px; margin-bottom: 12px; }
.role-card h3 { margin-bottom: 8px; }
.role-card p { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 18px;
}

/* ---------- Forms ---------- */
.form-box {
  max-width: 400px;
  margin: 40px auto;
  background: var(--card);
  padding: 30px;
  border-radius: 14px;
  border: 1px solid var(--border);
}
.form-box h2 { margin-bottom: 6px; text-align: center; }
.form-box .sub { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 20px; }

label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: #374151; }

input[type=text], input[type=email], input[type=password], input[type=date],
input[type=number], input[type=file], textarea, select {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
textarea { min-height: 100px; resize: vertical; }

button, .btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}
button:hover, .btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-outline { background: transparent; color: #fff; border: 1px solid #fff; }
.btn-outline:hover { background: rgba(255,255,255,.15); }
.btn-light { background: #fff; color: var(--primary); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.error { background: #fee2e2; color: #991b1b; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.success { background: #dcfce7; color: #166534; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.info { background: #dbeafe; color: #1e40af; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: #f9fafb; font-weight: 700; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-admin { background: #ede9fe; color: #6d28d9; }
.badge-teacher { background: #fef3c7; color: #92400e; }
.badge-student { background: #e0f2fe; color: #0369a1; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-banned { background: #fee2e2; color: #991b1b; }
.badge-grade-a { background: #dcfce7; color: #166534; }
.badge-grade-b { background: #dbeafe; color: #1e40af; }
.badge-grade-c { background: #fef9c3; color: #854d0e; }
.badge-grade-f { background: #fee2e2; color: #991b1b; }

.avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; background: #e5e7eb; }
.avatar-lg { width: 90px; height: 90px; border-radius: 50%; object-fit: cover; background: #e5e7eb; }

.pagination { display: flex; gap: 6px; margin-top: 20px; flex-wrap: wrap; }
.pagination a, .pagination span { padding: 7px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.muted { color: var(--muted); font-size: 13px; }
.text-center { text-align: center; }
.footer { text-align: center; padding: 30px; color: var(--muted); font-size: 13px; }
.footer a { color: var(--muted); font-weight: 600; }

/* ============================================
   RESPONSIVE — base/landing
   ============================================ */
@media (max-width: 900px) {
  .feature-grid, .role-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .navbar { flex-direction: column; align-items: flex-start; gap: 10px; padding: 14px 18px; }
  .navbar nav a { margin-left: 0; margin-right: 14px; }
  .hero { padding: 50px 16px; }
  .hero h1 { font-size: 27px; }
  .hero p { font-size: 14px; }
  .feature-grid, .role-grid, .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-box { margin: 20px auto; padding: 22px; }
  table, thead, tbody, th, td, tr { display: block; }
  thead { display: none; }
  table tr { border: 1px solid var(--border); border-radius: 10px; margin-bottom: 12px; padding: 8px 0; }
  table td { border: none; padding: 6px 14px 6px 45%; position: relative; }
  table td::before {
    content: attr(data-label); position: absolute; left: 14px; width: 40%;
    font-weight: 700; color: var(--muted); font-size: 12px;
  }
}

/* =========================================================
   GRADESPHERE 2026 VISUAL UPGRADE
   ========================================================= */
:root{--primary:#6366f1;--primary-2:#8b5cf6;--accent:#22d3ee;--pink:#ec4899;--bg:#f6f7fb;--surface:#fff;--text:#0f172a;--muted:#64748b;--border:rgba(100,116,139,.18);--shadow:0 18px 55px rgba(15,23,42,.10);--radius:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{overflow-x:hidden;background:radial-gradient(circle at 10% 0%,rgba(99,102,241,.10),transparent 30%),radial-gradient(circle at 90% 10%,rgba(236,72,153,.08),transparent 28%),var(--bg);color:var(--text)}
a{transition:all .2s ease}.navbar{position:sticky;top:0;z-index:1000;backdrop-filter:blur(18px);background:rgba(255,255,255,.78);border-bottom:1px solid var(--border);box-shadow:0 8px 30px rgba(15,23,42,.05)}
.navbar .brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.03em}.navbar .brand img{width:36px;height:36px;border-radius:11px;box-shadow:0 8px 24px rgba(99,102,241,.28)}
.navbar nav{display:flex;align-items:center;gap:6px}.navbar nav a{padding:10px 13px;border-radius:12px}.navbar nav a:hover{background:rgba(99,102,241,.09)}
.hero{position:relative;isolation:isolate;overflow:hidden;padding:110px 20px 105px;text-align:center;color:#fff;background:radial-gradient(circle at 15% 20%,rgba(34,211,238,.28),transparent 25%),radial-gradient(circle at 85% 10%,rgba(236,72,153,.25),transparent 28%),linear-gradient(135deg,#070a1c 0%,#15104a 50%,#250b3d 100%)}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);opacity:.55;z-index:-1}.hero:before{width:320px;height:320px;left:-100px;top:-100px;background:radial-gradient(circle,rgba(34,211,238,.5),transparent 68%);animation:floatGlow 8s ease-in-out infinite}.hero:after{width:400px;height:400px;right:-140px;bottom:-160px;background:radial-gradient(circle,rgba(236,72,153,.42),transparent 68%);animation:floatGlow 10s ease-in-out infinite reverse}
.hero h1{font-size:clamp(38px,6vw,76px);line-height:1.02;letter-spacing:-.055em;max-width:1000px;margin:0 auto 22px;background:linear-gradient(90deg,#fff,#a5f3fc,#c4b5fd,#f9a8d4);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{max-width:760px;margin:0 auto 30px;color:#dbeafe;font-size:clamp(15px,2vw,19px);line-height:1.7}.btn-group{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:12px 18px;font-weight:800;cursor:pointer;box-shadow:0 10px 25px rgba(15,23,42,.12);text-decoration:none}.btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(15,23,42,.18)}.btn:active{transform:translateY(0) scale(.98)}.btn-light{background:#fff;color:#111827}.btn-outline{border:1px solid rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.08);backdrop-filter:blur(12px)}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}.btn-sm{padding:9px 13px;border-radius:11px;font-size:13px}
.container{max-width:1180px;margin:auto;padding:82px 20px}.feature-grid,.role-grid{gap:18px}.feature-card,.role-card{position:relative;overflow:hidden;background:rgba(255,255,255,.78);backdrop-filter:blur(14px);border:1px solid var(--border);border-radius:22px;padding:25px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s}.feature-card:before,.role-card:before{content:"";position:absolute;inset:-1px;background:linear-gradient(135deg,rgba(34,211,238,.0),rgba(99,102,241,.18),rgba(236,72,153,.0));opacity:0;transition:opacity .25s;pointer-events:none}.feature-card:hover,.role-card:hover{transform:translateY(-6px);box-shadow:0 25px 60px rgba(15,23,42,.14);border-color:rgba(99,102,241,.3)}.feature-card:hover:before,.role-card:hover:before{opacity:1}.feature-card .icon,.role-card .icon{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(135deg,rgba(99,102,241,.13),rgba(34,211,238,.13));font-size:25px;margin-bottom:15px}.feature-card h3,.role-card h3{margin-bottom:8px}.feature-card p,.role-card p{color:var(--muted);line-height:1.65}
.form-box{width:min(94%,470px);margin:70px auto;padding:34px;border:1px solid var(--border);border-radius:26px;background:rgba(255,255,255,.82);backdrop-filter:blur(20px);box-shadow:0 30px 80px rgba(15,23,42,.13)}.form-box h2{font-size:30px;letter-spacing:-.04em}.form-box input,.form-box select,.form-box textarea,input,select,textarea{border-radius:13px;border:1px solid var(--border);background:rgba(255,255,255,.9);padding:12px 14px;outline:none;transition:border-color .2s,box-shadow .2s,transform .2s}.form-box input:focus,.form-box select:focus,.form-box textarea:focus,input:focus,select:focus,textarea:focus{border-color:rgba(99,102,241,.65);box-shadow:0 0 0 4px rgba(99,102,241,.10)}
button,input[type=submit],input[type=button]{font:inherit}.error,.success,.info{border:1px solid transparent;border-radius:14px;padding:12px 15px}.error{border-color:#fecaca}.success{border-color:#bbf7d0}.info{border-color:#bfdbfe}.footer{padding:40px 20px}
.offline-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#070a1c,#1b1450)}.offline-card{max-width:460px;text-align:center;padding:42px 28px;border-radius:28px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);color:#fff;backdrop-filter:blur(18px);box-shadow:0 30px 80px rgba(0,0,0,.3)}.offline-logo{width:86px;height:86px;border-radius:24px;margin-bottom:15px}.eyebrow{font-size:11px;letter-spacing:.18em;color:#67e8f9;font-weight:800}.offline-card h1{font-size:42px;margin:8px 0}.offline-card p{color:#cbd5e1;line-height:1.7}
.scroll-progress{position:fixed;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,#22d3ee,#6366f1,#ec4899);z-index:2000}.to-top{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border:0;border-radius:50%;background:linear-gradient(135deg,#6366f1,#ec4899);color:#fff;font-size:18px;box-shadow:0 14px 35px rgba(99,102,241,.35);opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s;z-index:1500}.to-top.show{opacity:1;pointer-events:auto;transform:none}
@keyframes floatGlow{50%{transform:translate3d(30px,25px,0) scale(1.08)}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media(max-width:640px){.navbar{padding:10px 14px}.navbar nav a:not(.pill){display:none}.hero{padding:78px 17px}.hero h1{font-size:42px}.hero p{font-size:15px}.container{padding:55px 15px}.form-box{margin:35px auto;padding:24px 18px;border-radius:20px}.btn{width:100%}.btn-group{width:100%}.feature-card,.role-card{padding:20px}.to-top{right:12px;bottom:12px}}

/* =========================================================
   GLOBAL LIGHT / DARK THEME
   ========================================================= */
html{color-scheme:light}
.theme-toggle{display:inline-grid;place-items:center;width:42px;height:42px;padding:0;border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.78);color:var(--text);cursor:pointer;font-size:18px;line-height:1;transition:transform .2s,background .2s,box-shadow .2s,border-color .2s}
.theme-toggle:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(15,23,42,.12);background:var(--card)}
.navbar nav .theme-toggle{margin-left:6px}
body.theme-dark{--bg:#070a16;--card:#0d1124;--text:#e7eaf3;--muted:#a6b0c3;--border:rgba(148,163,184,.18);--shadow:0 25px 70px rgba(0,0,0,.30);background:var(--bg);color:var(--text)}
body.theme-dark .navbar{background:rgba(7,10,22,.82);border-color:var(--border);box-shadow:0 8px 30px rgba(0,0,0,.22)}
body.theme-dark .navbar .brand,body.theme-dark .navbar nav a{color:var(--text)}
body.theme-dark .theme-toggle{background:rgba(13,17,36,.88);border-color:var(--border);color:#f8fafc}
body.theme-dark .container,body.theme-dark .footer{color:var(--text)}
body.theme-dark .feature-card,body.theme-dark .role-card{background:rgba(13,17,36,.84);border-color:var(--border);box-shadow:var(--shadow)}
body.theme-dark .feature-card p,body.theme-dark .role-card p,body.theme-dark .muted{color:var(--muted)}
body.theme-dark .form-box{background:rgba(13,17,36,.88);border-color:var(--border);box-shadow:0 30px 80px rgba(0,0,0,.35)}
body.theme-dark .form-box input,body.theme-dark .form-box select,body.theme-dark .form-box textarea,body.theme-dark input,body.theme-dark select,body.theme-dark textarea{background:#0b1021;color:var(--text);border-color:var(--border)}
body.theme-dark .form-box label{color:#dbe4f2}
body.theme-dark .footer{border-color:var(--border)}
body.theme-dark .hero{box-shadow:inset 0 -1px 0 rgba(255,255,255,.06)}
@media(max-width:640px){.navbar nav .theme-toggle{margin-left:0}.theme-toggle{width:40px;height:40px}}