/*
Theme Name: Course Center
Version: 1.2.0
Description: Reconstructed from the original course cards, welcome and login styles.
*/
:root{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;color:#334155;line-height:1.6;background:#fdfbf7}*{box-sizing:border-box}body{margin:0}a{color:#409eff;text-decoration:none}button,input{font:inherit}a:focus-visible,input:focus-visible,button:focus-visible{outline:3px solid #2563eb;outline-offset:4px}img{max-width:100%;height:auto}.xe-login-page{background:linear-gradient(180deg,#f0f7ff 0%,#fff 100%);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;text-align:center}.xe-logo-box{width:100px;height:100px;background:#e1efff;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:50px;margin-bottom:40px;box-shadow:0 10px 20px #0000000d}.xe-welcome-text{font-size:24px;font-weight:700;color:#333;margin:0 0 60px}.xe-login-btn{width:100%;max-width:320px;background:#70c1ff;color:#fff;min-height:56px;border-radius:28px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;text-decoration:none;box-shadow:0 8px 15px #70c1ff4d;transition:background .2s}.xe-login-btn:hover{background:#4facfe}.login-hint{font-size:13px;color:#71869a;margin-top:26px}.site-header{max-width:850px;display:flex;justify-content:space-between;gap:20px;margin:auto;padding:22px 20px;font-size:14px}.site-header>a:first-child{color:#334155;font-weight:700}.learning-main{max-width:850px;margin:0 auto;padding:10px 20px 50px}.my-course-container{padding:10px}.my-course-container>h1{font-size:22px;margin:5px 0 25px;color:#334155}.course-item{display:flex;align-items:center;background:#fff;padding:12px;border-radius:12px;margin-bottom:15px;text-decoration:none;box-shadow:0 4px 15px #0000000f;border:1px solid #f0f0f0}.course-item:hover{box-shadow:0 6px 22px #70c1ff26}.course-img{width:110px;height:75px;border-radius:8px;margin-right:15px;overflow:hidden;flex-shrink:0;background:#f9f9f9}.course-img img{width:100%;height:100%;object-fit:cover}.course-info{flex:1;min-width:0}.course-info h3{margin:0 0 4px;font-size:16px;color:#333;font-weight:bold}.course-info span{display:inline-block;padding:2px 8px;background:#f0f7ff;color:#327bcc;font-size:11px;border-radius:4px}.course-arrow{color:#c6d5e5;font-size:18px;margin-left:10px}.back-pill{display:inline-flex;background:#ffffffef;border:1px solid #e1f0ff;color:#4a88f4;padding:5px 13px;border-radius:20px;font-size:13px;font-weight:bold;box-shadow:0 4px 15px #70c1ff40;margin-bottom:20px}.page-title{font-size:22px;line-height:1.45;margin:5px 0 25px}.lesson-list{background:#fff;padding:10px 20px;border-radius:20px;box-shadow:0 5px 20px #00000005}.lesson-row{display:flex;align-items:center;padding:20px 10px;border-bottom:1px solid #f1f5f9;gap:20px}.lesson-row:last-child{border-bottom:none}.lesson-row:hover{background:#f8fbff}.lesson-number{font-size:18px;font-weight:800;color:#94a3b8;font-family:monospace}.lesson-info{flex:1;min-width:0}.lesson-info h3{font-size:16px;color:#1e293b;font-weight:600;margin:0 0 8px}.lesson-label{font-size:12px;background:#f1f5f9;padding:4px 12px;border-radius:8px;color:#64748b}.lesson-go{color:#239aca;font-size:14px;font-weight:bold;white-space:nowrap}.lesson-content video{display:block;width:100%;max-height:75vh;background:#111;border:8px solid #a0d8ef;border-radius:15px;box-shadow:0 4px 15px #0000001a;margin:20px auto}.empty{padding:40px 15px;text-align:center;color:#7a8b9a}.empty .xe-login-btn{margin:24px auto}.empty h1{font-size:24px;color:#334155}
/* Original pale-blue frosted login, applied to the clean native form. */
body.login{background:radial-gradient(circle,#fff 0%,#eef7ff 100%);background-attachment:fixed;min-height:100vh}body.login #login{width:min(380px,calc(100% - 32px));padding-top:7vh}body.login h1 a{background:none;text-indent:0;width:auto;height:auto;font-size:23px;color:#334155;font-weight:700;line-height:1.5;margin-bottom:22px}body.login form{background:#ffffffcc;backdrop-filter:blur(10px);border-radius:20px;box-shadow:0 15px 35px #70c1ff26;padding:35px 25px;border:none;margin-top:20px}body.login label{color:#60758a;font-size:15px}body.login input[type=text],body.login input[type=password]{border:1px solid #d4e4f2;border-radius:10px;padding:8px 12px;font-size:19px;background:#fff}body.login .button-primary{background:#70c1ff;border:none;border-radius:25px;color:#fff;width:100%;min-height:48px;font-size:18px;font-weight:bold;margin-top:20px;box-shadow:0 8px 20px #70c1ff4d}body.login .button-primary:hover{background:#4facfe}body.login .message,body.login #login_error{border-radius:12px;font-size:13px}body.login #nav,body.login #backtoblog{text-align:center}body.login .language-switcher{display:none}
@media(max-width:520px){.learning-main{padding:10px 12px 30px}.site-header{padding:18px 20px}.course-img{width:96px;height:70px}.lesson-list{padding:5px 10px}.lesson-row{gap:12px;padding:17px 4px}.lesson-go{font-size:12px}.course-info h3{font-size:15px}.xe-welcome-text{font-size:22px}.page-title{font-size:20px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}
/* Restored internal navigation and expandable chapter cards. */
.course-chapter{background:#fdfcf9;padding:12px;border-radius:22px;margin:0 0 18px}.course-chapter summary{cursor:pointer;background:#eef2ff;color:#4f46e5;font-weight:700;border-radius:12px;padding:15px 18px}.course-chapter summary span{font-size:12px;color:#7c83aa;float:right;font-weight:400}.course-chapter .lesson-list{background:transparent;padding:10px 0;box-shadow:none}.course-chapter .lesson-row{background:white;border:2px solid #f1f5f9;border-radius:18px;margin:10px 0;padding:18px;box-shadow:0 4px 0 #f1f5f9}.study-dashboard{max-width:600px;margin:0 auto 25px;padding:25px;background:white;border-radius:16px;text-align:center;box-shadow:0 4px 15px #00000008}.study-dashboard strong{display:block;font-size:48px;color:#4a88f4}.study-dashboard button{background:#4a88f4;color:white;border:0;border-radius:8px;padding:12px 24px;cursor:pointer}.study-note{font-size:12px;color:#8490a3}.study-check{width:22px;height:22px;flex-shrink:0;accent-color:#4a88f4}.study-complete h3{text-decoration:line-through;color:#94a3b8}.original-portal a[aria-disabled=true]{pointer-events:none;opacity:.55}.original-portal{max-width:100%}.original-portal svg{max-width:100%}@media(max-width:480px){.course-chapter{padding:6px}.course-chapter summary{padding:12px}.course-chapter .lesson-row{padding:12px;gap:10px}.lesson-go{white-space:normal}.original-portal .portals-grid{grid-template-columns:1fr}}@media print{.site-header,.back-pill,#study-print{display:none}.course-chapter{break-inside:avoid}}