/*
Theme Name: Zedemi – Khóa học AI
Theme URI: https://example.com/ai-cung-em-theme
Author: Zedemi
Description: Theme WordPress cho website khóa học AI dành cho thiếu niên 12–16 tuổi. Khách vào xem chương trình và đăng ký học. Học phí chỉnh sửa linh hoạt qua Appearance → Customize → "Học phí khóa học".
Version: 1.3.0
License: GNU General Public License v2 or later
Text Domain: ai-cung-em-theme
*/

/* ============ Nền tảng ============ */
:root{
  /* Bảng màu lấy từ logo Zedemi */
  --purple:#2F5BEA; --purple-d:#1E3FB8; --coral:#E8382B; --teal:#1FA2F5;
  --gold:#F97316; --ink:#0B1147; --cream:#F5F8FD; --line:#DFE6F4; --muted:#5B6588;
  --grad:linear-gradient(135deg,#F97316 0%,#E8382B 32%,#3B2ED0 68%,#1FA2F5 100%);
}
*{box-sizing:border-box;}
body{margin:0;background:var(--cream);color:var(--ink);font-family:'Be Vietnam Pro',system-ui,sans-serif;line-height:1.6;}
h1,h2,h3,h4{font-family:'Be Vietnam Pro',sans-serif;font-weight:800;line-height:1.2;letter-spacing:-.01em;margin:0;}
a{color:var(--purple);text-decoration:none;font-weight:600;}
a:hover{color:var(--purple-d);}
img{max-width:100%;height:auto;}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}

/* ============ Nút ============ */
.btn{display:inline-block;padding:13px 26px;border-radius:999px;border:2px solid var(--ink);
  background:#fff;color:var(--ink);font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:16px;
  cursor:pointer;transition:transform .1s ease;}
.btn:hover{transform:translateY(-1px);color:var(--ink);}
.btn-primary{background:var(--purple);border-color:var(--purple);color:#fff;}
.btn-primary:hover{background:var(--purple-d);border-color:var(--purple-d);color:#fff;}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,248,253,.94);backdrop-filter:blur(8px);border-bottom:2px solid var(--line);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-family:'Be Vietnam Pro',sans-serif;font-weight:800;font-size:22px;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand img{display:block;height:38px;width:auto;}
.custom-logo-link{display:flex;align-items:center;}
.custom-logo{display:block;height:38px;width:auto;}
@media(max-width:820px){ .brand img,.custom-logo{height:30px;} }
.main-nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;align-items:center;}
.main-nav a{color:var(--ink);font-weight:600;}
.main-nav a:hover{color:var(--purple);}
.nav-toggle{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--ink);}
@media(max-width:820px){
  .main-nav{position:absolute;top:72px;left:0;right:0;background:var(--cream);border-bottom:2px solid var(--line);display:none;}
  .main-nav.open{display:block;}
  .main-nav ul{flex-direction:column;align-items:stretch;padding:16px 24px;gap:14px;}
  .nav-toggle{display:block;}
}

/* ============ Hero ============ */
.hero{text-align:center;padding:72px 0 48px;position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;background:var(--grad);opacity:.9;}
.hero .tag{display:inline-block;background:var(--gold);color:#fff;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:14px;padding:6px 18px;border-radius:999px;}
.hero h1{font-size:clamp(36px,6vw,68px);margin:20px auto 14px;max-width:16ch;}
.hero p.lead{font-size:19px;color:var(--muted);max-width:60ch;margin:0 auto;}
.hero .actions{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ============ Số liệu ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0 8px;}
.stats .cell{background:#fff;border:2px solid var(--line);border-radius:20px;padding:22px;text-align:center;}
.stats b{display:block;font-family:'Be Vietnam Pro',sans-serif;font-size:40px;color:var(--purple);}
.stats span{font-size:14px;color:var(--muted);}

/* ============ Section chung ============ */
.section{padding:64px 0;}
.section-kicker{display:block;text-align:center;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--purple);}
.section h2{text-align:center;font-size:clamp(28px,4vw,42px);margin:10px 0 8px;}
.section .sub{text-align:center;color:var(--muted);max-width:56ch;margin:0 auto 40px;}

/* ============ Chương trình ============ */
.phase{display:grid;grid-template-columns:64px 1fr;gap:20px;background:#fff;border:2px solid var(--line);border-radius:20px;padding:26px;margin-bottom:16px;}
.phase-num{font-family:'Be Vietnam Pro',sans-serif;font-size:36px;font-weight:800;color:var(--gold);}
.phase h3{font-size:23px;margin-bottom:4px;}
.phase .psub{color:var(--muted);margin:0 0 12px;}
.phase ul{margin:0;padding-left:20px;}
.phase li{margin:5px 0;}

/* ============ Học phí ============ */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start;}
.plan{background:#fff;border:2px solid var(--line);border-radius:22px;padding:28px;display:flex;flex-direction:column;height:100%;}
.plan.featured{border-color:var(--purple);box-shadow:0 10px 0 #E1E9FF;}
.plan .ptag{font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:13px;color:var(--purple);text-transform:uppercase;letter-spacing:.04em;}
.plan h3{font-size:24px;margin:8px 0;}
.plan .price{font-family:'Be Vietnam Pro',sans-serif;font-size:36px;font-weight:800;color:var(--ink);}
.plan .price small{font-size:15px;font-weight:500;color:var(--muted);}
.plan ul{list-style:none;padding:0;margin:16px 0 22px;flex:1;}
.plan li{padding:7px 0;border-bottom:1px solid var(--line);font-size:15px;}
.plan li::before{content:"✓ ";color:var(--teal);font-weight:800;}
.plan .btn{margin-top:auto;text-align:center;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 44px;}
.faq h3{font-family:'Be Vietnam Pro',sans-serif;font-size:20px;margin-bottom:6px;}
.faq p{margin:0;color:var(--muted);}

/* ============ CTA ============ */
.cta{background:var(--ink);color:#fff;border-radius:28px;padding:56px 28px;text-align:center;margin:0 24px;}
.cta h2{font-size:clamp(28px,4vw,40px);color:#fff;margin-bottom:10px;}
.cta p{color:#B7C4E6;max-width:52ch;margin:0 auto 26px;}

/* ============ Footer ============ */
.site-footer{background:#fff;border-top:2px solid var(--line);padding:40px 0;margin-top:64px;color:var(--muted);font-size:14px;}
.site-footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center;}
.foot-brand{display:flex;align-items:center;gap:12px;max-width:62ch;}
.foot-brand img{width:34px;height:34px;flex:none;}

/* ============ Nội dung trang (page.php) ============ */
.page-content{max-width:760px;margin:48px auto;padding:0 24px;}
.page-content h1{font-size:36px;margin-bottom:20px;}

@media(max-width:820px){
  .stats,.plans,.faq-grid{grid-template-columns:1fr;}
  .phase{grid-template-columns:1fr;}
}

/* ============ Marketplace ============ */
.hero-market{padding-bottom:36px;}
.hero-search{display:flex;gap:10px;max-width:620px;margin:30px auto 0;}
.hero-search input{flex:1;border:2px solid var(--line);border-radius:999px;padding:14px 22px;font-size:16px;font-family:inherit;background:#fff;}
.hero-search input:focus{outline:2px solid var(--purple);border-color:var(--purple);}
.hero-cats{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:18px;}
.hero-cats a{border:2px solid var(--line);border-radius:999px;padding:7px 16px;font-size:14px;color:var(--ink);background:#fff;}
.hero-cats a:hover{border-color:var(--purple);color:var(--purple);}

.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:24px;margin-top:36px;}
.course-card{display:flex;flex-direction:column;background:#fff;border:2px solid var(--line);border-radius:22px;overflow:hidden;color:var(--ink);transition:transform .12s ease,box-shadow .12s ease;}
.course-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(11,17,71,.14);color:var(--ink);}
.cc-thumb{position:relative;height:150px;overflow:hidden;background:var(--accent);}
.cc-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.cc-art{position:absolute;inset:0;background:
   radial-gradient(120% 140% at 88% 8%, rgba(255,255,255,.28) 0%, rgba(255,255,255,0) 55%),
   linear-gradient(135deg, color-mix(in srgb,var(--accent) 88%,#0B1147) 0%, var(--accent) 55%, color-mix(in srgb,var(--accent) 62%,#1FA2F5) 100%);}
.cc-art::before{content:"";position:absolute;right:-38px;bottom:-52px;width:170px;height:170px;border-radius:36px;transform:rotate(18deg);
   background:linear-gradient(135deg,rgba(255,255,255,.20),rgba(255,255,255,.04));}
.cc-art::after{content:"";position:absolute;left:-26px;top:-30px;width:104px;height:104px;border-radius:50%;background:rgba(255,255,255,.12);}
.cc-mark{position:absolute;left:20px;bottom:16px;width:44px;height:44px;opacity:.95;filter:drop-shadow(0 2px 6px rgba(11,17,71,.28));}
.cc-cat{position:absolute;left:20px;top:18px;background:rgba(255,255,255,.94);color:var(--ink);font-weight:700;font-size:12px;letter-spacing:.02em;padding:5px 12px;border-radius:999px;}
.cc-badge{position:absolute;right:16px;top:16px;background:var(--gold);color:#fff;font-weight:700;font-size:12px;padding:5px 12px;border-radius:999px;box-shadow:0 4px 10px rgba(249,115,22,.35);}
.cc-count{position:absolute;right:16px;bottom:16px;color:#fff;font-weight:700;font-size:13px;background:rgba(11,17,71,.34);padding:5px 12px;border-radius:999px;backdrop-filter:blur(3px);}
.cc-body{padding:20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.cc-top{display:flex;justify-content:space-between;align-items:center;}
.cc-chip{background:color-mix(in srgb,var(--accent) 14%,#fff);color:var(--accent);font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:12px;padding:4px 12px;border-radius:999px;}
.cc-level{font-size:13px;color:var(--muted);font-weight:600;}
.cc-body h3{font-size:20px;}
.cc-body p{color:var(--muted);font-size:14px;margin:0;flex:1;}
.cc-meta{display:flex;gap:14px;font-size:13px;color:var(--muted);}
.cc-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:12px;margin-top:4px;}
.cc-price{font-family:'Be Vietnam Pro',sans-serif;font-weight:800;font-size:22px;color:var(--accent);}
.cc-go{font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:14px;color:var(--accent);}

.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px;}
.why{background:var(--cream);border:2px solid var(--line);border-radius:20px;padding:26px 24px;text-align:center;}
.why-ic{font-size:40px;}
.why h3{font-size:18px;margin:12px 0 8px;}
.why p{color:var(--muted);font-size:14px;margin:0;}
.cc-lib{margin-top:12px;background:#FFF1E6;border:2px solid #FBCFA6;border-radius:12px;padding:9px 12px;font-size:13px;font-weight:600;color:#B44A08;}

/* ============ Kho template & prompt (điểm khác biệt) ============ */
.lib-section{background:linear-gradient(180deg,#fff 0%,var(--cream) 100%);}
.lib-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px;}
.lib-card{background:#fff;border:2px solid var(--line);border-radius:20px;padding:26px 24px;}
.lib-ic{font-size:34px;}
.lib-card h3{font-size:18px;margin:12px 0 8px;}
.lib-card p{color:var(--muted);font-size:14px;margin:0;line-height:1.65;}
.lib-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px;}
.lib-item{display:block;background:#fff;border:2px solid var(--line);border-left:8px solid var(--accent);border-radius:16px;padding:20px 22px;text-decoration:none;}
.lib-item:hover{border-color:var(--accent);}
.lib-item-name{display:block;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:17px;color:var(--ink);}
.lib-item-desc{display:block;color:var(--muted);font-size:14px;line-height:1.6;margin-top:6px;}
.lib-item-go{display:block;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:14px;color:var(--accent);margin-top:10px;}
@media(max-width:820px){ .lib-grid{grid-template-columns:1fr 1fr;} .lib-list{grid-template-columns:1fr;} }

.notice{background:#FFF1E6;border:2px solid #FBCFA6;border-radius:16px;padding:16px 20px;margin-top:24px;}
@media(max-width:820px){ .why-grid{grid-template-columns:1fr 1fr;} .hero-search{flex-direction:column;} }