/*
Theme Name: Thu vien de thi HSG Toan THCS
Author: OpenAI
Description: Theme responsive cho thu vien de thi hoc sinh gioi Toan THCS lop 6-9.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: hsg-toan-thcs
*/
:root{--blue:#0866d9;--ink:#17345e;--muted:#6480a4;--line:#dce9f8;--pale:#edf6ff;--shadow:0 8px 26px #155bab14}*{box-sizing:border-box}body{margin:0;background:#f7fbff;color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:var(--blue);text-decoration:none}a:hover{color:#064da6}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}.header{position:sticky;top:0;z-index:20;background:linear-gradient(105deg,#0758bc,#0876eb);color:white}.admin-bar .header{top:32px}.nav{min-height:68px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:white;min-width:240px}.brand:hover{color:white}.brand-icon{font-size:27px;background:#ffffff22;border:1px solid #ffffff45;border-radius:12px;padding:5px 9px}.brand strong{display:block;font-size:16px;line-height:1.25}.brand small{display:block;font-size:11px;opacity:.88}.menu{display:flex;gap:5px;margin-left:auto;align-items:center}.menu a{padding:9px 10px;border-radius:9px;color:#eaf4ff;font-size:13px}.menu a:hover{background:#ffffff22;color:white}.hero{background:linear-gradient(115deg,#e9f5ff,#f8fcff 60%,#dcefff);border-bottom:1px solid var(--line)}.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:25px;padding:48px 0 40px}.eyebrow{display:inline-block;color:var(--blue);font-size:12px;font-weight:750;background:white;border:1px solid #cce3ff;border-radius:30px;padding:6px 12px}.hero h1{font-size:clamp(30px,4vw,44px);letter-spacing:-1.2px;line-height:1.15;margin:17px 0 12px;color:#103e7f}.hero h1 span{color:var(--blue)}.hero p{color:#55769e;max-width:600px}.hero-art{text-align:center;font-size:100px;filter:drop-shadow(0 15px 10px #2b75bd24)}.search{display:flex;gap:7px;background:white;border:1px solid #c9e0fa;border-radius:13px;padding:6px;box-shadow:var(--shadow)}.search input{min-width:0;flex:1;border:0;outline:0;padding:10px 13px}.btn,.btn2{display:inline-flex;align-items:center;justify-content:center;border-radius:9px;padding:10px 15px;font-weight:700;font-size:13px;cursor:pointer;border:1px solid var(--blue)}.btn{background:var(--blue);color:white}.btn:hover{background:#0758bd;color:white}.btn2{background:white;color:var(--blue);border-color:#c5ddf8}.section{padding:30px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}.section h2{font-size:21px;margin:0;color:#123d79}.section-head p{margin:5px 0 0;color:var(--muted);font-size:13px}.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.grade{display:block;background:white;border:1px solid var(--line);border-radius:15px;padding:19px;text-align:center;box-shadow:var(--shadow)}.grade:hover{transform:translateY(-2px);border-color:#8fc5ff}.grade-num{display:grid;place-items:center;width:48px;height:48px;margin:0 auto 9px;border-radius:15px;background:#e7f4ff;color:var(--blue);font-size:23px;font-weight:850}.grade:nth-child(2) .grade-num{background:#eeeaff;color:#6c4dd5}.grade:nth-child(3) .grade-num{background:#e2f6ee;color:#17966c}.grade:nth-child(4) .grade-num{background:#fff0df;color:#e17a13}.grade strong{display:block}.grade small{display:block;color:var(--muted);margin-top:5px}.toolbar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr)) auto;background:#eff7ff;border:1px solid var(--line);padding:12px;border-radius:13px;gap:9px;margin:18px 0}.toolbar select{width:100%;min-width:0;background:white;border:1px solid #d1e2f6;border-radius:9px;padding:10px;color:#385778}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card{background:white;border:1px solid var(--line);border-radius:14px;padding:17px;box-shadow:var(--shadow);display:flex;flex-direction:column;min-width:0}.card-top{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:10px}.pill{background:#e5f3ff;color:#0866d9;font-weight:750;font-size:11px;padding:5px 9px;border-radius:7px}.tag{font-size:11px;color:#6582a4;background:#f2f7fc;padding:5px 8px;border-radius:7px}.card h3{font-size:15px;line-height:1.45;margin:0 0 10px;color:#173f79}.meta{font-size:12px;color:#6a83a1;display:flex;flex-wrap:wrap;gap:7px;margin-bottom:13px}.actions{display:flex;gap:8px;margin-top:auto;flex-wrap:wrap}.actions .btn,.actions .btn2{flex:1}.page-title{padding:28px 0 8px}.crumb{font-size:12px;color:#7290b4;margin-bottom:10px}.page-title h1{font-size:clamp(25px,3vw,32px);color:#123f7d;margin:0 0 7px}.page-title p{color:var(--muted);margin:0;font-size:14px}.result-line{color:var(--muted);font-size:13px;margin:14px 0}.empty{background:white;border:1px dashed #b8d4f3;border-radius:14px;text-align:center;padding:35px 15px;color:var(--muted);grid-column:1/-1}.detail-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.8fr);gap:18px;margin:20px 0 40px}.panel{background:white;border:1px solid var(--line);border-radius:15px;padding:20px;box-shadow:var(--shadow);margin-bottom:15px}.panel h2{font-size:17px;margin:0 0 14px}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:17px 0}.info-grid div{background:#f3f8ff;border-radius:10px;padding:11px}.info-grid small{display:block;color:var(--muted);font-size:11px}.info-grid strong{font-size:13px}.pdf-frame{width:100%;height:650px;border:1px solid var(--line);border-radius:10px;background:#f4f8fc}.content{background:white;border:1px solid var(--line);border-radius:14px;padding:22px;margin:20px 0 35px;overflow-wrap:anywhere}.content img{max-width:100%;height:auto}.provinces{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.province{display:block;background:white;border:1px solid var(--line);border-radius:12px;padding:14px}.about{max-width:820px;margin:25px auto 45px;text-align:center}.about p{color:#607d9e;line-height:1.8}.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;text-align:left;margin-top:25px}.step{background:white;border:1px solid var(--line);border-radius:13px;padding:15px}.footer{margin-top:35px;background:#0b3f83;color:#d7e9ff;padding:26px 0}.footer-inner{display:flex;justify-content:space-between;gap:18px;align-items:center}.footer small{opacity:.82}.pagination{text-align:center;margin:25px 0}.pagination .page-numbers{display:inline-block;background:white;border:1px solid var(--line);border-radius:8px;padding:7px 12px;margin:0 3px}.pagination .current{background:var(--blue);color:white}@media(max-width:850px){.menu a{padding:8px;font-size:12px}.brand{min-width:200px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.toolbar{grid-template-columns:repeat(3,minmax(0,1fr))}.provinces{grid-template-columns:repeat(3,1fr)}}@media(max-width:620px){.admin-bar .header{top:46px}.wrap{width:calc(100% - 28px)}.nav{min-height:62px;flex-wrap:wrap;gap:8px;padding:8px 0}.brand{min-width:0}.brand-icon{font-size:22px}.brand strong{font-size:14px}.menu{width:100%;overflow:auto;gap:3px;margin:0;padding-bottom:4px}.menu a{white-space:nowrap;font-size:12px}.hero-inner{grid-template-columns:1fr;padding:30px 0}.hero-art{display:none}.hero h1{font-size:32px}.search input{padding:9px 6px;font-size:13px}.search .btn{padding:9px 11px}.section{padding:23px 0}.grades{grid-template-columns:repeat(2,1fr);gap:10px}.grade{padding:15px 9px}.toolbar{grid-template-columns:repeat(2,minmax(0,1fr));padding:9px;gap:8px}.cards{grid-template-columns:1fr;gap:10px}.card{padding:15px}.detail-grid{grid-template-columns:1fr}.info-grid{grid-template-columns:repeat(2,1fr)}.provinces{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:1fr}.footer-inner{display:block}.footer small{display:block;margin-top:7px}.pdf-frame{height:480px}}