/* =====================================================
   ระบบงานปกครอง — Mobile-first CSS
   ===================================================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px}
body{font-family:'Sarabun','Prompt',sans-serif;background:#f1f5f9;color:#1e293b;min-height:100vh}

/* ---- Typography ---- */
a{color:inherit;text-decoration:none}
h1,h2,h3{font-weight:700;line-height:1.3}

/* ===================== LOGIN PAGE ===================== */
.login-page{background:linear-gradient(135deg,#1e40af 0%,#3b82f6 100%);display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px}
.login-wrap{width:100%;max-width:400px}
.login-card{background:#fff;border-radius:16px;padding:36px 28px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.login-logo{font-size:48px;text-align:center;margin-bottom:8px}
.login-title{text-align:center;font-size:1.4rem;color:#1e40af;margin-bottom:4px}
.login-sub{text-align:center;color:#64748b;font-size:.88rem;margin-bottom:24px}

/* ===================== APP SHELL ===================== */
.app-header{background:#1e40af;color:#fff;padding:0 16px;height:52px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.app-header-left{display:flex;align-items:center;gap:10px}
.app-title{font-size:1rem;font-weight:700}
.app-semester{font-size:.75rem;opacity:.8;background:rgba(255,255,255,.2);padding:2px 8px;border-radius:20px}
.app-header-right{display:flex;align-items:center;gap:12px}
.user-name{font-size:.82rem;opacity:.9}
.btn-logout{color:#fff;opacity:.8;font-size:.8rem;border:1px solid rgba(255,255,255,.4);padding:4px 10px;border-radius:6px;cursor:pointer;background:none;transition:.2s}
.btn-logout:hover{opacity:1;background:rgba(255,255,255,.15)}

/* ===================== PAGE BODY ===================== */
.page-body{padding:16px;max-width:600px;margin:0 auto}

/* ===================== FORMS & FIELDS ===================== */
.field{margin-bottom:14px}
.field label{display:block;font-size:.85rem;font-weight:600;color:#374151;margin-bottom:5px}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border:1.5px solid #cbd5e1;border-radius:8px;font-size:1rem;font-family:inherit;background:#fff;transition:border-color .2s,box-shadow .2s;-webkit-appearance:none}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.field textarea{resize:vertical;min-height:80px}
.field-row{display:flex;gap:12px}
.field-row .field{flex:1}

/* ===================== BUTTONS ===================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:8px;font-size:.95rem;font-family:inherit;font-weight:600;border:none;cursor:pointer;transition:.2s;-webkit-tap-highlight-color:transparent;text-align:center}
.btn:active{transform:scale(.97)}
.btn-primary{background:#2563eb;color:#fff}
.btn-primary:hover{background:#1d4ed8}
.btn-danger{background:#dc2626;color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-success{background:#16a34a;color:#fff}
.btn-success:hover{background:#15803d}
.btn-secondary{background:#e2e8f0;color:#374151}
.btn-secondary:hover{background:#cbd5e1}
.btn-outline{background:transparent;color:#2563eb;border:1.5px solid #2563eb}
.btn-full{width:100%}
.btn-lg{padding:13px 20px;font-size:1.05rem}
.btn-sm{padding:6px 12px;font-size:.82rem}
.btn-icon{font-size:1.1rem;padding:10px 14px}

/* ===================== ALERTS ===================== */
.alert{padding:12px 14px;border-radius:8px;font-size:.88rem;margin-bottom:16px}
.alert-danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert-success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.alert-info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

/* ===================== CARDS ===================== */
.card{background:#fff;border-radius:12px;box-shadow:0 1px 4px rgba(0,0,0,.08);overflow:hidden;margin-bottom:12px}
.card-header{padding:14px 16px;border-bottom:1px solid #f1f5f9;font-weight:700;font-size:.9rem;color:#374151;display:flex;align-items:center;gap:8px}
.card-body{padding:16px}

/* ===================== SEARCH ===================== */
.search-card{background:#fff;border-radius:12px;padding:14px;box-shadow:0 1px 4px rgba(0,0,0,.08);margin-bottom:16px}
.search-bar{display:flex;gap:8px}
.search-bar input{flex:1;padding:11px 14px;border:1.5px solid #cbd5e1;border-radius:8px;font-size:1rem;font-family:inherit}
.search-bar input:focus{outline:none;border-color:#3b82f6}
.btn-qr{background:#0ea5e9;color:#fff;border:none;border-radius:8px;width:46px;height:46px;font-size:1.3rem;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.btn-qr:hover{background:#0284c7}
.search-hint{font-size:.78rem;color:#94a3b8;margin-top:8px}

/* ===================== STUDENT LIST ===================== */
.student-list{display:flex;flex-direction:column;gap:8px}
.student-card{background:#fff;border-radius:10px;padding:14px 16px;display:flex;align-items:center;gap:12px;box-shadow:0 1px 3px rgba(0,0,0,.07);border:1.5px solid transparent;transition:.2s;cursor:pointer}
.student-card:hover,.student-card:active{border-color:#3b82f6;background:#f8faff}
.student-avatar{width:44px;height:44px;border-radius:50%;background:#e0e7ff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0;font-weight:700;color:#3b82f6}
.student-info{flex:1;min-width:0}
.student-name{font-weight:700;font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.student-meta{font-size:.78rem;color:#64748b;margin-top:2px}
.student-arrow{color:#94a3b8;font-size:1.3rem}
.no-result{text-align:center;color:#94a3b8;padding:32px 0;font-size:.9rem}

/* ===================== STUDENT PROFILE ===================== */
.profile-card{background:linear-gradient(135deg,#1e40af,#3b82f6);color:#fff;border-radius:12px;padding:20px;margin-bottom:12px}
.profile-avatar{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:700;margin-bottom:10px}
.profile-name{font-size:1.1rem;font-weight:700}
.profile-sub{font-size:.82rem;opacity:.85;margin-top:3px}
.profile-id{font-size:.8rem;opacity:.7;margin-top:2px}

.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}
.score-box{background:#fff;border-radius:10px;padding:14px 10px;text-align:center;box-shadow:0 1px 3px rgba(0,0,0,.07)}
.score-box .val{font-size:1.6rem;font-weight:700;line-height:1}
.score-box .lbl{font-size:.72rem;color:#64748b;margin-top:4px}
.score-deduct .val{color:#dc2626}
.score-good   .val{color:#16a34a}
.score-net    .val{color:#2563eb}

.action-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}
.action-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:18px 10px;border-radius:12px;border:none;cursor:pointer;font-family:inherit;font-size:.9rem;font-weight:700;transition:.2s}
.action-btn:active{transform:scale(.96)}
.action-btn .icon{font-size:1.8rem}
.action-deduct{background:#fef2f2;color:#dc2626;border:2px solid #fecaca}
.action-deduct:hover{background:#dc2626;color:#fff}
.action-good{background:#f0fdf4;color:#16a34a;border:2px solid #bbf7d0}
.action-good:hover{background:#16a34a;color:#fff}

/* ===================== RECORD LIST ===================== */
.record-list{display:flex;flex-direction:column;gap:6px}
.record-item{background:#fff;border-radius:8px;padding:10px 12px;display:flex;gap:10px;align-items:flex-start;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.record-badge{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;flex-shrink:0}
.badge-deduct{background:#fef2f2;color:#dc2626}
.badge-good{background:#f0fdf4;color:#16a34a}
.record-body{flex:1;min-width:0}
.record-rule{font-size:.82rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.record-detail{font-size:.75rem;color:#64748b;margin-top:1px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.record-date{font-size:.72rem;color:#94a3b8;flex-shrink:0;margin-top:3px}

/* ===================== FORM PAGE ===================== */
.form-header{background:#fff;border-radius:12px;padding:14px 16px;margin-bottom:12px;display:flex;align-items:center;gap:12px;box-shadow:0 1px 3px rgba(0,0,0,.07)}
.form-header-avatar{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;flex-shrink:0}
.form-header-deduct{background:#fef2f2;color:#dc2626}
.form-header-good{background:#f0fdf4;color:#16a34a}
.form-header-info .name{font-weight:700;font-size:.92rem}
.form-header-info .meta{font-size:.75rem;color:#64748b;margin-top:2px}

.rule-select-wrap select{font-size:.9rem}
.rule-hint{font-size:.75rem;color:#64748b;margin-top:4px}
.point-display{display:flex;align-items:center;gap:10px}
.point-display input{width:100px}
.point-hint{font-size:.78rem;color:#64748b}

.form-actions{display:flex;gap:10px;margin-top:4px}
.form-actions .btn{flex:1}

/* ===================== SCORE BAR ===================== */
.score-bar-wrap{margin:8px 0}
.score-bar-bg{background:#e2e8f0;border-radius:99px;height:10px;overflow:hidden}
.score-bar-fill{height:100%;border-radius:99px;transition:width .5s}
.score-bar-fill.high{background:#16a34a}
.score-bar-fill.mid{background:#f59e0b}
.score-bar-fill.low{background:#dc2626}
.score-bar-label{display:flex;justify-content:space-between;font-size:.72rem;color:#64748b;margin-top:4px}

/* ===================== BACK LINK ===================== */
.back-link{display:inline-flex;align-items:center;gap:6px;color:#64748b;font-size:.85rem;margin-bottom:12px;padding:6px 0}
.back-link:hover{color:#1e40af}

/* ===================== MODAL (QR) ===================== */
.modal-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);z-index:999;align-items:center;justify-content:center;padding:16px}
.modal-overlay.active{display:flex}
.modal-box{background:#fff;border-radius:16px;width:100%;max-width:380px;overflow:hidden}
.modal-head{padding:14px 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #f1f5f9}
.modal-head h3{font-size:.95rem;font-weight:700}
.modal-close{background:none;border:none;font-size:1.5rem;color:#94a3b8;cursor:pointer;line-height:1;padding:0 4px}
.modal-close:hover{color:#374151}
#qr-reader{width:100%}
#qr-reader video{width:100%!important}
.qr-status{padding:12px 16px;font-size:.82rem;color:#64748b;text-align:center;min-height:42px}

/* ===================== TABS ===================== */
.tabs{display:flex;background:#f8fafc;border-radius:10px;padding:3px;margin-bottom:14px}
.tab-btn{flex:1;padding:8px;border:none;background:none;border-radius:7px;font-family:inherit;font-size:.85rem;font-weight:600;color:#64748b;cursor:pointer;transition:.2s}
.tab-btn.active{background:#fff;color:#1e40af;box-shadow:0 1px 3px rgba(0,0,0,.1)}

/* ===================== EMPTY STATE ===================== */
.empty{text-align:center;padding:20px 0;color:#94a3b8;font-size:.85rem}

/* ===================== SECTION TITLE ===================== */
.section-title{font-size:.8rem;font-weight:700;color:#64748b;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;margin-top:4px}

/* ===================== RESPONSIVE ===================== */
@media(min-width:600px){
  .page-body{padding:20px}
  .login-card{padding:44px 40px}
  .score-grid{grid-template-columns:repeat(3,1fr)}
  .profile-card{display:flex;align-items:center;gap:16px}
  .profile-avatar{margin-bottom:0;flex-shrink:0}
}