@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root{--purple:#422080;--purple2:#54279b;--yellow:#ffcf25;--ink:#17233e}*{box-sizing:border-box}body{font-family:Inter,Arial,sans-serif;background:#f8faff;color:var(--ink)}.top-logo{height:130px;background:#fff;display:flex;align-items:center;justify-content:center;flex-direction:column;color:var(--purple)}.brand-name{font:700 38px Georgia;font-style:italic}.brand-name span{font-style:normal;font-size:30px}.brand-subtitle{font-weight:600}.main-navbar{background:linear-gradient(90deg,#3d1b78,#4d218f);height:65px}.sidebar{width:275px;background:#fff;border-right:1px solid #e8ebf2;padding:24px 12px;flex-shrink:0}.app-shell{display:flex;min-height:calc(100vh - 195px)}.side-link{display:flex;align-items:center;gap:22px;color:#17233e;text-decoration:none;padding:15px 14px;border-radius:9px;margin-bottom:5px;font-weight:600}.side-link i{font-size:22px}.side-link.active,.side-link:hover{background:linear-gradient(90deg,#482080,#542796);color:#fff}.main-content{flex:1;padding:22px 25px;min-width:0}.hero-banner{height:273px;border-radius:15px;background:linear-gradient(90deg,#3d1c79,#54299a);color:#fff;display:flex;justify-content:space-between;align-items:center;padding:32px 58px;overflow:hidden}.hero-banner h1{font-size:42px;font-weight:800}.hero-banner h1 span{color:var(--yellow)}.hero-banner p{font-size:18px}.hero-art{font-size:120px;display:flex;gap:15px;opacity:.9}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:30px 0 20px}.section-heading h2,.page-header h1{color:var(--purple);font-weight:800}.section-heading a{color:var(--purple);text-decoration:none;font-weight:600}.course-card,.panel,.stat-card,.admin-card{background:#fff;border:1px solid #e5e9f0;border-radius:14px;box-shadow:0 3px 12px #24345a0d}.course-card{overflow:hidden}.course-image{height:120px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:65px;background:linear-gradient(135deg,#112f65,#0b9bd0)}.course-card h5{font-weight:800}.progress{height:8px;background:#e3e8f0}.progress-bar{background:var(--purple)}.btn-primary{background:var(--purple);border-color:var(--purple)}.btn-primary:hover{background:#321663}.panel{padding:24px}.stat-card{padding:22px;display:flex;align-items:center;gap:18px}.stat-card>i{font-size:34px;color:var(--purple)}.stat-card h3{margin:0;color:var(--purple);font-weight:800}.stat-card small{color:#718096}.admin-card{display:flex;align-items:center;gap:18px;padding:25px;text-decoration:none;color:var(--ink)}.admin-card>i:first-child{font-size:36px;color:var(--purple)}.admin-card h3{margin:0;color:var(--purple)}.admin-card p{margin:0;color:#718096}.lesson-row,.message-row{display:flex;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid #edf0f5}.lesson-row:last-child,.message-row:last-child{border-bottom:0}.lesson-row>div:nth-child(2),.message-row>div{flex:1}.lesson-row small{display:block;color:#718096}.lesson-number{width:38px;height:38px;border-radius:50%;background:#eee7fa;color:var(--purple);display:flex;align-items:center;justify-content:center;font-weight:800}.progress-lg{height:14px}.profile-box{text-align:center;padding:50px}.login-page{min-height:100vh;background:linear-gradient(135deg,#3c1c76,#6a35aa);display:flex;align-items:center;justify-content:center}.login-card{background:#fff;width:420px;max-width:92%;padding:40px;border-radius:18px;box-shadow:0 20px 60px #180b3533}.login-logo{text-align:center;color:var(--purple);font:700 30px Georgia}.login-logo span{font-size:24px}.login-logo small{display:block;font:12px Inter}.login-card h3{color:var(--purple)}@media(max-width:991px){.sidebar{position:fixed;left:-290px;top:195px;height:calc(100vh - 195px);z-index:1000;transition:.25s}.sidebar.show{left:0}.main-content{padding:15px}.hero-banner{height:auto;padding:30px}.hero-art{display:none}.top-logo{height:100px}}

.system-logo{max-width:100%;width:720px;height:auto;max-height:150px;object-fit:contain;display:block;margin:0 auto;}
.top-logo{background:#fff;padding:10px 20px;text-align:center;border-bottom:1px solid #eee;}
@media (max-width:768px){.system-logo{width:100%;max-height:100px;}.top-logo{padding:8px 10px;}}
.table-responsive{overflow-x:auto}.ai-answer{white-space:pre-wrap;background:#f7f3ff;border-left:4px solid var(--purple);padding:18px;border-radius:8px}.panel h4{color:var(--purple);font-weight:800}.ratio iframe{border:0;border-radius:12px}@media(max-width:576px){.main-navbar{height:auto;min-height:65px}.main-navbar .navbar-brand{font-size:1rem}.main-content{padding:10px}.hero-banner h1{font-size:30px}.page-header h1{font-size:1.7rem}.panel{padding:16px}.stat-card{padding:15px}.side-link{padding:12px}.course-card .btn{font-size:.9rem}}

.portal-tools{margin-bottom:28px}.portal-tool-card{background:#fff;border:1px solid #e5e9f0;border-radius:14px;box-shadow:0 3px 12px #24345a0d;padding:20px;display:flex;align-items:center;gap:16px;text-decoration:none;color:var(--ink);height:100%;transition:transform .18s,box-shadow .18s,border-color .18s}.portal-tool-card:hover{transform:translateY(-2px);box-shadow:0 8px 22px #24345a18;border-color:#d8cdf0;color:var(--ink)}.portal-tool-icon{width:54px;height:54px;min-width:54px;border-radius:14px;background:#eee7fa;color:var(--purple);display:flex;align-items:center;justify-content:center;font-size:27px}.portal-tool-card h5{margin:0 0 5px;color:var(--purple);font-weight:800}.portal-tool-card p{margin:0;color:#718096;font-size:.88rem}.portal-tool-card>.bi-chevron-right{color:#9aa5b5;font-size:20px}.page-header h1 i{margin-right:8px}

.login-system-logo{width:100%;max-width:300px;height:auto;max-height:125px;object-fit:contain;display:block;margin:0 auto 12px}.login-logo strong{display:block;color:var(--purple);font-size:25px;margin-bottom:4px}.login-logo small{display:block;font:12px Inter;color:#718096}.login-logo{text-align:center}