/* isoulcoach.com — SoulCoach · Inti School of Light
   Ý tưởng: trang đi từ ĐÊM (Moon) qua RẠNG ĐÔNG (Sun) tới ÁNH SÁNG (Source).
   Màu nền của từng vùng chính là ba chặng của lộ trình. */

:root {
  --dem: #12163a;        /* đêm — nền vùng Moon */
  --cham: #27347a;       /* chạng vạng */
  --trang: #dce4ff;      /* ánh trăng — chữ trên nền tối */
  --trang-mo: #a9b5e6;
  --rang: #f2b84b;       /* vàng mặt trời — điểm nhấn duy nhất */
  --hong: #f4dcc6;       /* rạng đông */
  --nguon: #fffcf3;      /* ánh sáng nguồn — nền vùng sáng */
  --muc: #1b1e36;        /* mực trên nền sáng */
  --muc-nhat: #50557a;
  --ke: rgba(27, 30, 54, 0.14);
  --ke-dem: rgba(220, 228, 255, 0.18);
  --display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --rong: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--muc);
  background: var(--nguon);
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--rang); outline-offset: 3px; border-radius: 4px; }
.an { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.khung { width: min(100% - 2.5rem, var(--rong)); margin-inline: auto; }

h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.12; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.9rem, 1.2rem + 2.6vw, 3rem); }
h3 { font-size: 1.35rem; line-height: 1.25; }
p { margin: 0 0 1em; }
.nhan {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase;
  margin: 0 0 1.1rem;
}

/* ── Đầu trang ─────────────────────────────────────────── */
.dau-noi { position: absolute; inset: 0 0 auto 0; z-index: 2; }   /* nằm đè lên vùng đêm, ngoài <main> */
.dau {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  padding-block: 1.4rem;
}
.ten {
  display: inline-flex; align-items: center; text-decoration: none;
  font-weight: 600; letter-spacing: 0.34em; font-size: 0.98rem; color: var(--trang);
}
.ten-o {           /* chữ O của SOULCOACH là một vầng trăng khuyết */
  display: inline-block; width: 0.95em; height: 0.95em; margin: 0 0.36em 0 0.02em;
  border-radius: 50%; box-shadow: inset -0.26em 0 0 0 var(--rang);
  transform: rotate(-20deg);
}
.loi { display: flex; align-items: center; gap: 1.6rem; font-size: 0.95rem; }
.loi a { text-decoration: none; color: var(--trang-mo); }
.loi a:hover, .loi a[aria-current="page"] { color: #fff; }
.loi .nut-nho {
  color: var(--dem); background: var(--rang); padding: 0.5rem 0.95rem; border-radius: 999px; font-weight: 600;
}
.loi .nut-nho:hover { color: var(--dem); background: #ffd27a; }
@media (max-width: 760px) {
  .loi a:not(.nut-nho) { display: none; }
}

/* ── Vùng ĐÊM (Moon) ───────────────────────────────────── */
.vung-dem {
  color: var(--trang);
  padding-top: 5.2rem;          /* chừa chỗ cho đầu trang nằm đè */
  background:
    radial-gradient(1px 1px at 12% 22%, rgba(255,255,255,.75) 50%, transparent 51%),
    radial-gradient(1px 1px at 31% 64%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 57% 14%, rgba(255,255,255,.7) 50%, transparent 51%),
    radial-gradient(1px 1px at 72% 48%, rgba(255,255,255,.45) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 30%, rgba(255,255,255,.6) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 44% 86%, rgba(255,255,255,.4) 50%, transparent 51%),
    radial-gradient(120% 90% at 78% 10%, #1d2560 0%, var(--dem) 60%);
}
.mo-dau {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); align-items: center;
  gap: clamp(1.5rem, 5vw, 5rem); padding-block: clamp(2.5rem, 7vw, 6rem) clamp(3rem, 7vw, 6rem);
}
.mo-dau .nhan { color: var(--rang); }
.mo-dau h1 {
  font-size: clamp(3.6rem, 1.6rem + 9.5vw, 8.2rem); font-weight: 300; letter-spacing: -0.035em; color: #fff;
  font-variation-settings: "opsz" 144, "SOFT" 100;
}
.mo-dau h1 em { font-style: italic; font-weight: 300; }
.cau-chinh {
  font-family: var(--display); font-size: clamp(1.3rem, 1rem + 1.35vw, 1.9rem); line-height: 1.35;
  margin: 1.2rem 0 1.4rem; color: #fff; max-width: 24em;
}
.mo-dau .dan { max-width: 36em; color: var(--trang); }
.hang-nut { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 1.8rem; }
.nut {
  display: inline-flex; align-items: center; gap: 0.5rem; text-decoration: none; font-weight: 600;
  padding: 0.9rem 1.35rem; border-radius: 999px; line-height: 1.2; transition: transform .2s ease, background .2s ease;
}
.nut:hover { transform: translateY(-2px); }
.nut-chinh { background: var(--rang); color: var(--dem); }
.nut-chinh:hover { background: #ffd27a; }
.nut-phu { border: 1px solid var(--ke-dem); color: var(--trang); }
.nut-phu:hover { border-color: var(--trang); }

.trang {                      /* vầng trăng khuyết — chữ ký của trang */
  justify-self: center; position: relative; width: min(100%, 360px); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 34% 32%, #ffffff 0%, #e6ecff 38%, #a9b8f0 100%);
  box-shadow: 0 0 110px 26px rgba(170, 186, 255, 0.22);
  overflow: hidden;
}
.trang::after {
  content: ""; position: absolute; inset: -1px; border-radius: 50%;
  background: radial-gradient(circle at 60% 40%, #1a2156 0%, var(--dem) 70%);
  transform: translateX(27%);
  animation: tuan-trang 14s ease-in-out infinite alternate;
}
@keyframes tuan-trang { to { transform: translateX(35%); } }

.so-lieu {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0;
  border-top: 1px solid var(--ke-dem); margin: 0; padding: 0 0 clamp(2.5rem, 5vw, 4rem);
}
.so-lieu div { padding: 1.3rem 1.2rem 0 0; }
.so-lieu dt { font-size: 0.76rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--trang-mo); margin-bottom: 0.35rem; }
.so-lieu dd { margin: 0; font-family: var(--display); font-size: 1.2rem; line-height: 1.3; color: #fff; overflow-wrap: anywhere; }
.so-lieu dd a { text-decoration-color: var(--rang); text-underline-offset: 0.2em; }

/* ── Vùng RẠNG (lộ trình Moon → Sun → Source) ─────────── */
.vung-rang {
  color: var(--trang);
  background: linear-gradient(180deg, var(--dem) 0%, var(--cham) 34%, #8c6f9e 62%, #f0b98a 82%, var(--hong) 93%, var(--nguon) 100%);
  padding-block: clamp(3rem, 7vw, 6rem) clamp(5rem, 11vw, 9rem);
}
.vung-rang h2 { color: #fff; max-width: 15em; }
.vung-rang .nhan { color: var(--rang); }
.vung-rang .mo-ta { max-width: 38em; margin-top: 1.1rem; }

.quy-dao { display: block; width: 100%; height: auto; margin: clamp(1.5rem, 4vw, 3rem) 0 0.5rem; }
.chang { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1rem, 3vw, 2.5rem); }
.chang li { padding-top: 1.1rem; border-top: 1px solid var(--ke-dem); }
.chang .ten-chang { font-family: var(--display); font-size: clamp(1.7rem, 1.2rem + 1.6vw, 2.4rem); color: #fff; line-height: 1.1; }
.chang .y { font-style: italic; font-family: var(--display); color: var(--rang); margin: 0.2rem 0 0.7rem; font-size: 1.1rem; }
.chang p:last-child { margin-bottom: 0; }
.ghi-chu { margin-top: 2.2rem; font-size: 0.95rem; color: #fff; max-width: 46em; }
.ghi-chu a { text-decoration-color: var(--rang); text-underline-offset: 0.2em; }

/* ── Vùng SÁNG (Source) ───────────────────────────────── */
.vung-sang { background: var(--nguon); color: var(--muc); }
.doan { padding-block: clamp(3rem, 7vw, 5.5rem); }
.doan + .doan { border-top: 1px solid var(--ke); }
.doan .nhan { color: #9a6a0a; }
.doan h2 { max-width: 16em; margin-bottom: 1.2rem; }
.doan .mo-ta { max-width: 40em; color: var(--muc-nhat); }

.hai-cot { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 5vw, 4.5rem); margin-top: 2.2rem; }
.hai-cot h3 { margin-bottom: 0.9rem; }
.danh-sach { list-style: none; margin: 0; padding: 0; }
.danh-sach li { padding: 0.8rem 0 0.8rem 1.7rem; border-top: 1px solid var(--ke); position: relative; }
.danh-sach li::before {
  content: ""; position: absolute; left: 0; top: 1.35rem; width: 0.62rem; height: 0.62rem; border-radius: 50%;
  box-shadow: inset -0.17rem 0 0 0 #c08a16;
}
.khoa { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.khoa li { border: 1px solid var(--ke); border-radius: 999px; padding: 0.35rem 0.85rem; font-size: 0.93rem; background: #fff; }
.chu-nho { font-size: 0.9rem; color: var(--muc-nhat); margin-top: 1.6rem; }

.ranh-gioi {
  margin-top: 2.2rem; padding: 1.2rem 1.4rem; border-left: 3px solid var(--rang); background: #fff7e1; max-width: 46em;
}
.ranh-gioi p { margin: 0; }

.thay { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(1.5rem, 5vw, 4.5rem); align-items: start; }
.thay .trich { font-family: var(--display); font-style: italic; font-size: clamp(1.4rem, 1.1rem + 1.3vw, 2rem); line-height: 1.3; margin: 0; }
.thay .lien-ket { display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; margin-top: 1rem; }
.doan a:not(.nut):not(.video) { text-decoration-color: #c08a16; text-underline-offset: 0.2em; }

.luoi-video { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.1rem; margin-top: 2rem; }
.video { text-decoration: none; display: block; }
.video .anh { position: relative; border-radius: 12px; overflow: hidden; aspect-ratio: 16 / 9; background: var(--dem); }
.video img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.video:hover img { transform: scale(1.04); }
.video .phut {
  position: absolute; right: 0.5rem; bottom: 0.5rem; background: rgba(18, 22, 58, 0.86); color: #fff;
  font-size: 0.78rem; padding: 0.12rem 0.5rem; border-radius: 999px;
}
.video strong { display: block; font-weight: 600; line-height: 1.35; margin-top: 0.7rem; }
.video span.nguon { font-size: 0.85rem; color: var(--muc-nhat); }

.hoi-dap { margin-top: 1.6rem; max-width: 50em; }
.hoi-dap details { border-top: 1px solid var(--ke); padding: 1rem 0; }
.hoi-dap details:last-child { border-bottom: 1px solid var(--ke); }
.hoi-dap summary {
  cursor: pointer; list-style: none; font-family: var(--display); font-size: 1.25rem; line-height: 1.3;
  display: flex; justify-content: space-between; gap: 1rem;
}
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after { content: "+"; color: #9a6a0a; font-family: var(--body); flex: none; }
.hoi-dap details[open] summary::after { content: "–"; }
.hoi-dap details p { margin: 0.8rem 0 0; color: var(--muc-nhat); max-width: 44em; }

.nguon-chinh { list-style: none; margin: 1.6rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 3rem; }
.nguon-chinh li { border-top: 1px solid var(--ke); padding: 0.85rem 0; display: flex; justify-content: space-between; gap: 1rem; }
.nguon-chinh span { color: var(--muc-nhat); font-size: 0.92rem; text-align: right; }

.ket {
  text-align: center; padding-block: clamp(3.5rem, 8vw, 6.5rem);
  background: radial-gradient(60% 120% at 50% 0%, #fff 0%, var(--nguon) 70%);
}
.ket h2 { margin-inline: auto; max-width: 14em; }
.ket p { max-width: 34em; margin: 1.1rem auto 1.8rem; color: var(--muc-nhat); }
.ket .nut-chinh { background: var(--dem); color: #fff; }
.ket .nut-chinh:hover { background: var(--cham); }

.chan { background: var(--dem); color: var(--trang-mo); font-size: 0.92rem; }
.chan .khung { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding-block: 2rem; }
.chan a { color: var(--trang); text-underline-offset: 0.2em; }
.chan p { margin: 0; max-width: 44em; }

/* ── Trang con ─────────────────────────────────────────── */
.dau-con { padding-block: clamp(2rem, 5vw, 4rem) clamp(2.5rem, 6vw, 4.5rem); }
.dau-con .nhan { color: var(--rang); }
.dau-con h1 { font-size: clamp(2.4rem, 1.4rem + 4.6vw, 4.6rem); font-weight: 300; color: #fff; letter-spacing: -0.025em; max-width: 14em; }
.dau-con .cau-chinh { max-width: 30em; }
.duong-dan { font-size: 0.88rem; color: var(--trang-mo); margin: 0 0 1.4rem; }
.duong-dan a { color: var(--trang); text-underline-offset: 0.2em; }
.bai { max-width: 46em; }
.bai h2 { font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.2rem); margin: 2.6rem 0 0.9rem; }
.bai h2:first-child { margin-top: 0; }
.bai h3 { margin: 1.8rem 0 0.5rem; }
.bai ul, .bai ol { padding-left: 1.2rem; margin: 0 0 1.1em; }
.bai li { margin-bottom: 0.45em; }
.tra-loi-ngan { font-family: var(--display); font-size: clamp(1.25rem, 1.05rem + 0.9vw, 1.65rem); line-height: 1.4; margin: 0 0 1.6rem; }
.bang { width: 100%; border-collapse: collapse; margin: 1rem 0 1.4rem; font-size: 0.97rem; }
.bang th, .bang td { text-align: left; vertical-align: top; padding: 0.75rem 0.9rem 0.75rem 0; border-top: 1px solid var(--ke); }
.bang th { font-weight: 600; width: 28%; }
.bang thead th { font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muc-nhat); border-top: 0; }
.cuon-ngang { overflow-x: auto; }

@media (max-width: 900px) {
  .mo-dau { grid-template-columns: 1fr; }
  .trang { width: min(58vw, 240px); justify-self: start; order: -1; }
  .so-lieu { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chang { grid-template-columns: 1fr; }
  .quy-dao { display: none; }
  .hai-cot, .thay, .nguon-chinh { grid-template-columns: 1fr; }
  .luoi-video { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .so-lieu { grid-template-columns: 1fr; }
  .luoi-video { grid-template-columns: 1fr; }
  .nguon-chinh li { flex-direction: column; gap: 0.1rem; }
  .nguon-chinh span { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .trang::after { animation: none; }
  .nut, .video img { transition: none; }
}