/* ==========================================================================
   Oriental Wisdom Journal — learning site styles
   Quiet paper / ink / brass palette. Reading first, decoration last.
   ========================================================================== */
:root {
    --owj-ink: #16223a;
    --owj-muted: #5c6a80;
    --owj-faint: #8b97a9;
    --owj-line: #e0e6ef;
    --owj-paper: #f6f8fb;
    --owj-card: #ffffff;
    --owj-gold: #9a7420;
    --owj-gold-soft: rgba(154, 116, 32, .10);
    --owj-green: #2f6b4f;
    --owj-red: #a33a3a;
    --owj-radius: 14px;
    --owj-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --owj-serif: Georgia, "Songti SC", "Times New Roman", serif;
    --owj-max: 1060px;
    --owj-shadow: 0 1px 2px rgba(22, 34, 58, .05), 0 10px 30px rgba(22, 34, 58, .05);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--owj-paper);
    color: var(--owj-ink);
    font-family: var(--owj-font);
    font-size: 16px;
    line-height: 1.65;
}

h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 2.4vw, 1.6rem); }
h3 { font-size: 1.12rem; }
p { margin: 0 0 1em; }
a { color: var(--owj-gold); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
hr { border: 0; border-top: 1px solid var(--owj-line); margin: 28px 0; }

.wrap { max-width: var(--owj-max); margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 780px; }
.muted { color: var(--owj-muted); }
.small { font-size: .88rem; }
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 12px; } .mt-2 { margin-top: 24px; } .mt-3 { margin-top: 40px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 12px; } .mb-2 { margin-bottom: 24px; }
.hidden { display: none !important; }

/* ---------------------------------------------------------------- top bar */
.owj-topbar {
    background: var(--owj-card);
    border-bottom: 1px solid var(--owj-line);
    position: sticky; top: 0; z-index: 40;
}
.owj-topbar-inner {
    max-width: var(--owj-max); margin: 0 auto; padding: 10px 20px;
    display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.owj-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--owj-ink); }
.owj-brand:hover { text-decoration: none; }
.owj-brand .mark {
    width: 30px; height: 30px; border-radius: 8px; flex: 0 0 auto;
    background: var(--owj-gold-soft); border: 1px solid rgba(154, 116, 32, .35);
    color: var(--owj-gold); display: grid; place-items: center; font-size: 17px;
}
.owj-brand .name { font-size: 1rem; letter-spacing: .2px; }
.owj-brand .sub { display: block; font-size: .7rem; font-weight: 500; color: var(--owj-faint); }

.owj-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.owj-nav a {
    color: var(--owj-muted); font-size: .92rem; padding: 7px 11px; border-radius: 8px; white-space: nowrap;
}
.owj-nav a:hover { background: var(--owj-paper); color: var(--owj-ink); text-decoration: none; }
.owj-nav a.active { color: var(--owj-gold); background: var(--owj-gold-soft); font-weight: 600; }

.owj-actions { display: flex; align-items: center; gap: 8px; }
.owj-menu-toggle { display: none !important; }
@media (max-width: 720px) {
    .owj-topbar-inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
    .owj-brand { grid-column: 1; grid-row: 1; min-width: 0; }
    .owj-brand .name { font-size: .85rem; }
    .owj-menu-toggle { display: inline-flex !important; grid-column: 2; grid-row: 1; }
    .owj-actions { grid-column: 1; grid-row: 2; flex-wrap: wrap; min-width: 0; }
    .owj-actions a { max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .owj-lang { grid-column: 2; grid-row: 2; max-width: 95px; }
    .owj-nav { display: none; grid-column: 1 / -1; grid-row: 3; margin-left: 0; }
    .owj-nav.open { display: flex; }
}
.owj-lang {
    border: 1px solid var(--owj-line); background: #fff; color: var(--owj-muted);
    border-radius: 8px; padding: 6px 8px; font-size: .88rem; cursor: pointer;
}

/* ---------------------------------------------------------------- buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    border: 1px solid var(--owj-line); background: #fff; color: var(--owj-ink);
    border-radius: 10px; padding: 9px 16px; font-size: .94rem; font-weight: 600;
    cursor: pointer; font-family: inherit; transition: background-color .16s, border-color .16s, color .16s;
    text-decoration: none;
}
.btn:hover { border-color: var(--owj-gold); color: var(--owj-gold); text-decoration: none; }
.btn-primary { background: var(--owj-gold); border-color: var(--owj-gold); color: #fff; }
.btn-primary:hover { background: #7f5f1a; border-color: #7f5f1a; color: #fff; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--owj-muted); }
.btn-ghost:hover { background: var(--owj-paper); }
.btn-sm { padding: 6px 11px; font-size: .85rem; border-radius: 8px; }
.btn-lg { padding: 12px 22px; font-size: 1rem; }
.btn[disabled], .btn.is-busy { opacity: .55; cursor: not-allowed; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* ---------------------------------------------------------------- surfaces */
.card {
    background: var(--owj-card); border: 1px solid var(--owj-line);
    border-radius: var(--owj-radius); padding: 22px; box-shadow: var(--owj-shadow);
}
.card-tight { padding: 16px; }
.card + .card { margin-top: 16px; }
.panel-title { font-size: 1.05rem; margin: 0 0 10px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 26px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- hero */
.hero { padding: 54px 0 34px; }
.hero .kicker {
    display: inline-block; font-size: .78rem; letter-spacing: .16em; text-transform: uppercase;
    color: var(--owj-gold); background: var(--owj-gold-soft); border-radius: 999px;
    padding: 5px 13px; margin-bottom: 16px; font-weight: 600;
}
.hero h1 { max-width: 22em; }
.hero .lead { font-size: 1.08rem; color: var(--owj-muted); max-width: 40em; }
.hero-steps { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }
.hero-steps span {
    font-size: .85rem; color: var(--owj-muted); border: 1px solid var(--owj-line);
    background: #fff; border-radius: 999px; padding: 5px 12px;
}
.hero-steps span b { color: var(--owj-gold); }

.section { padding: 34px 0; }
.section-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.section-head h2 { margin: 0; }
.section-head .more { margin-left: auto; font-size: .9rem; }

/* ---------------------------------------------------------------- tracks */
.track-card { display: flex; flex-direction: column; gap: 8px; color: inherit; }
.track-card:hover { text-decoration: none; border-color: var(--owj-gold); }
.track-card h3 { margin: 0; }
.track-card .count { font-size: .82rem; color: var(--owj-faint); }
.track-card p { margin: 0; color: var(--owj-muted); font-size: .92rem; }
.track-card .go { margin-top: auto; font-size: .88rem; color: var(--owj-gold); font-weight: 600; }

/* ---------------------------------------------------------------- lists */
.lesson-list { list-style: none; margin: 0; padding: 0; }
.lesson-list li { border-bottom: 1px solid var(--owj-line); }
.lesson-list li:last-child { border-bottom: 0; }
.lesson-row {
    display: flex; align-items: center; gap: 14px; padding: 13px 4px; color: inherit;
}
.lesson-row:hover { text-decoration: none; background: var(--owj-paper); }
.lesson-row .fig {
    width: 34px; text-align: center; font-size: 22px; color: var(--owj-gold);
    font-family: var(--owj-serif); flex: 0 0 auto;
}
.lesson-row .idx { width: 34px; text-align: center; font-size: .8rem; color: var(--owj-faint); flex: 0 0 auto; }
.lesson-row .body { min-width: 0; flex: 1 1 auto; }
.lesson-row .title { font-weight: 600; }
.lesson-row .meta { font-size: .82rem; color: var(--owj-faint); }
.lesson-row .state { font-size: .78rem; border-radius: 999px; padding: 3px 9px; flex: 0 0 auto; }
.state-done { background: rgba(47, 107, 79, .12); color: var(--owj-green); }
.state-active { background: var(--owj-gold-soft); color: var(--owj-gold); }
.state-locked { background: #eef1f6; color: var(--owj-faint); }

/* ---------------------------------------------------------------- hexagrams */
.hex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; }
.hex-cell {
    display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 12px 6px;
    background: #fff; border: 1px solid var(--owj-line); border-radius: 12px; color: inherit;
    text-align: center;
}
.hex-cell:hover { border-color: var(--owj-gold); text-decoration: none; background: var(--owj-gold-soft); }
.hex-cell .fig { font-size: 30px; line-height: 1; color: var(--owj-gold); font-family: var(--owj-serif); }
.hex-cell .num { font-size: .72rem; color: var(--owj-faint); }
.hex-cell .nm { font-size: .82rem; font-weight: 600; }

.hex-figure { font-size: 62px; line-height: 1; color: var(--owj-gold); font-family: var(--owj-serif); }
.trigram-pair { display: flex; flex-direction: column; gap: 2px; font-size: 30px; color: var(--owj-gold); line-height: 1; }

.classic-block {
    background: #fff; border: 1px solid var(--owj-line); border-left: 3px solid var(--owj-gold);
    border-radius: 10px; padding: 14px 16px; margin: 0 0 12px;
}
.classic-block .label { font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--owj-faint); }
.classic-block .text { font-family: var(--owj-serif); font-size: 1.05rem; }
.zh .classic-block .text { font-family: var(--owj-serif); }

.line-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.line-table td { padding: 8px 10px; border-bottom: 1px solid var(--owj-line); vertical-align: top; }
.line-table td.pos { width: 92px; color: var(--owj-faint); font-size: .82rem; white-space: nowrap; }
.line-table tr.changing td { background: var(--owj-gold-soft); }
.line-table tr.changing td.pos { color: var(--owj-gold); font-weight: 600; }

/* ---------------------------------------------------------------- lesson */
.lesson-body { font-size: 1.02rem; }
.lesson-body h3 {
    margin: 30px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--owj-line);
    font-size: 1.1rem; color: var(--owj-ink);
}
.lesson-body h3:first-child { margin-top: 0; }
.lesson-body ul, .lesson-body ol { padding-left: 22px; }
.lesson-body li { margin-bottom: 5px; }
.lesson-body blockquote {
    margin: 14px 0; padding: 12px 18px; background: var(--owj-gold-soft);
    border-left: 3px solid var(--owj-gold); border-radius: 0 10px 10px 0;
    font-family: var(--owj-serif); font-size: 1.06rem;
}
.lesson-body blockquote p:last-child { margin-bottom: 0; }
.lesson-body table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: .92rem; }
.lesson-body th, .lesson-body td { border: 1px solid var(--owj-line); padding: 8px 10px; text-align: left; }

.breadcrumb { font-size: .85rem; color: var(--owj-faint); margin: 18px 0 10px; }
.breadcrumb a { color: var(--owj-muted); }
.meta-row { display: flex; gap: 14px; flex-wrap: wrap; font-size: .85rem; color: var(--owj-faint); margin-bottom: 6px; }
.tag {
    display: inline-block; font-size: .78rem; color: var(--owj-muted); background: var(--owj-paper);
    border: 1px solid var(--owj-line); border-radius: 999px; padding: 3px 10px;
}
.pager { display: flex; justify-content: space-between; gap: 14px; margin-top: 30px; }
.pager a { flex: 1 1 0; min-width: 0; }
.pager .dir { display: block; font-size: .76rem; color: var(--owj-faint); }

/* ---------------------------------------------------------------- tutor */
.chat-log { display: flex; flex-direction: column; gap: 14px; }
.msg { border-radius: 12px; padding: 14px 16px; border: 1px solid var(--owj-line); background: #fff; }
.msg.user { background: var(--owj-gold-soft); border-color: rgba(154, 116, 32, .3); }
.msg .who { font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: var(--owj-faint); margin-bottom: 6px; }
.answer-block { margin-bottom: 14px; }
.answer-block h4 { margin: 0 0 5px; font-size: 1rem; color: var(--owj-gold); }
.answer-block .text p { margin: 0 0 8px; }
.refs { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--owj-line); font-size: .86rem; }
.refs ul { margin: 6px 0 0; padding-left: 18px; }
.prompt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
    border: 1px solid var(--owj-line); background: #fff; color: var(--owj-muted);
    border-radius: 999px; padding: 6px 13px; font-size: .85rem; cursor: pointer; font-family: inherit;
}
.chip:hover { border-color: var(--owj-gold); color: var(--owj-gold); }

/* ---------------------------------------------------------------- forms */
label.field { display: block; margin-bottom: 14px; font-size: .88rem; color: var(--owj-muted); font-weight: 600; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="date"], select, textarea {
    width: 100%; margin-top: 5px; padding: 10px 12px; border: 1px solid var(--owj-line);
    border-radius: 10px; font-size: .96rem; font-family: inherit; color: var(--owj-ink); background: #fff;
}
textarea { min-height: 120px; resize: vertical; line-height: 1.6; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--owj-gold); outline-offset: 1px; border-color: var(--owj-gold); }
.form-msg { font-size: .88rem; margin-top: 10px; }
.form-msg.error { color: var(--owj-red); }
.form-msg.ok { color: var(--owj-green); }

/* ---------------------------------------------------------------- misc blocks */
.callout {
    border: 1px solid var(--owj-line); border-left: 3px solid var(--owj-gold);
    background: #fff; border-radius: 0 12px 12px 0; padding: 14px 18px; margin: 0 0 16px;
}
.callout.plain { border-left-color: var(--owj-line); }
.callout h4 { margin: 0 0 6px; font-size: .95rem; }
.callout p:last-child { margin-bottom: 0; }

.stat-tile { background: #fff; border: 1px solid var(--owj-line); border-radius: 12px; padding: 16px; text-align: center; }
.stat-tile .num { font-size: 1.7rem; font-weight: 700; color: var(--owj-gold); line-height: 1.1; }
.stat-tile .lbl { font-size: .82rem; color: var(--owj-muted); margin-top: 4px; }

.plan { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.plan .col { background: #fff; border: 1px solid var(--owj-line); border-radius: var(--owj-radius); padding: 22px; }
.plan .col.plus { border-color: var(--owj-gold); box-shadow: 0 10px 30px rgba(154, 116, 32, .10); }
.plan .col h3 { margin-top: 0; }
.plan ul { list-style: none; padding: 0; margin: 0 0 16px; }
.plan li { padding-left: 22px; position: relative; margin-bottom: 7px; font-size: .93rem; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--owj-gold); font-weight: 700; }
.price-line { font-size: 1.5rem; font-weight: 700; color: var(--owj-gold); }
.price-line small { font-size: .8rem; color: var(--owj-muted); font-weight: 500; }

.coin-tray { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; margin: 18px 0; }
.coin {
    width: 88px; height: 88px; border-radius: 50%; border: 2px solid var(--owj-gold);
    background: linear-gradient(160deg, #fffdf6, #f1e5c8); display: grid; place-items: center;
    cursor: pointer; font-weight: 700; color: var(--owj-gold); font-size: 1.5rem; user-select: none;
    font-family: var(--owj-serif);
}
.coin small { display: block; font-size: .62rem; color: var(--owj-muted); font-weight: 500; }
@media (max-width: 620px) { .coin { width: 68px; height: 68px; font-size: 1.2rem; } }

.cline-list { list-style: none; margin: 0; padding: 0; }
.cline-list li {
    display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-bottom: 1px solid var(--owj-line);
}
.cline-list li:last-child { border-bottom: 0; }
.cline-list .pos { font-size: .8rem; color: var(--owj-faint); width: 74px; }
.cline-list .sym { font-size: 1.5rem; color: var(--owj-gold); font-family: var(--owj-serif); width: 34px; }
.cline-list .val { font-size: .8rem; color: var(--owj-muted); }
.cline-list .tag-moving { font-size: .74rem; color: var(--owj-gold); background: var(--owj-gold-soft); border-radius: 999px; padding: 2px 8px; }
.line-picker { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.line-picker .pick { border: 1px solid var(--owj-line); border-radius: 10px; padding: 10px; background: #fff; }
.line-picker .pick .lbl { font-size: .78rem; color: var(--owj-faint); margin-bottom: 6px; }
.line-picker .pick .opts { display: flex; gap: 5px; }
.line-picker .pick button {
    flex: 1; border: 1px solid var(--owj-line); background: #fff; border-radius: 7px; padding: 5px 3px;
    cursor: pointer; font-size: .8rem; color: var(--owj-muted); font-family: inherit;
}
.line-picker .pick button.on { background: var(--owj-gold); border-color: var(--owj-gold); color: #fff; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: s; padding-left: 34px; position: relative; margin-bottom: 10px; }
.steps li::before {
    content: counter(s); position: absolute; left: 0; top: 1px; width: 23px; height: 23px;
    border-radius: 50%; background: var(--owj-gold-soft); color: var(--owj-gold);
    display: grid; place-items: center; font-size: .8rem; font-weight: 700;
}

.toc { list-style: none; padding: 0; margin: 0; font-size: .92rem; }
.toc li { margin-bottom: 6px; }
.toc a { color: var(--owj-muted); }
.toc a:hover { color: var(--owj-gold); }

.badge { font-size: .74rem; border-radius: 999px; padding: 3px 9px; background: var(--owj-paper); color: var(--owj-muted); border: 1px solid var(--owj-line); }
.badge-plus { background: var(--owj-gold-soft); color: var(--owj-gold); border-color: rgba(154, 116, 32, .3); }
.badge-free { background: rgba(47, 107, 79, .1); color: var(--owj-green); border-color: rgba(47, 107, 79, .25); }

.empty { text-align: center; color: var(--owj-faint); padding: 30px 16px; font-size: .93rem; }
.loading { color: var(--owj-faint); font-size: .92rem; padding: 14px 0; }
.spinner {
    display: inline-block; width: 14px; height: 14px; border: 2px solid var(--owj-line);
    border-top-color: var(--owj-gold); border-radius: 50%; animation: owj-spin .7s linear infinite;
    vertical-align: -2px; margin-right: 8px;
}
@keyframes owj-spin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------- modal */
.owj-modal-back {
    position: fixed; inset: 0; background: rgba(22, 34, 58, .45); z-index: 90;
    display: grid; place-items: center; padding: 20px;
}
.owj-modal {
    background: #fff; border-radius: 16px; padding: 26px; width: 100%; max-width: 420px;
    box-shadow: 0 24px 60px rgba(22, 34, 58, .25); max-height: 90vh; overflow: auto;
}
.owj-modal h3 { margin-top: 0; }
.owj-modal .tabs { display: flex; gap: 6px; margin-bottom: 18px; }
.owj-modal .tabs button {
    flex: 1; border: 1px solid var(--owj-line); background: #fff; border-radius: 9px; padding: 8px;
    cursor: pointer; font-size: .9rem; color: var(--owj-muted); font-family: inherit; font-weight: 600;
}
.owj-modal .tabs button.on { background: var(--owj-gold); border-color: var(--owj-gold); color: #fff; }

/* ---------------------------------------------------------------- toast */
#owj-toast {
    position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 100;
    display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none;
}
#owj-toast .toast {
    background: var(--owj-ink); color: #fff; border-radius: 10px; padding: 10px 18px;
    font-size: .9rem; box-shadow: 0 10px 30px rgba(22, 34, 58, .3); max-width: 90vw;
}
#owj-toast .toast.err { background: var(--owj-red); }

/* ---------------------------------------------------------------- footer */
.owj-footer { margin-top: 60px; background: #fff; border-top: 1px solid var(--owj-line); }
.owj-footer .cols {
    max-width: var(--owj-max); margin: 0 auto; padding: 36px 20px 10px;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 26px;
}
.owj-footer h4 { font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; color: var(--owj-faint); margin-bottom: 10px; }
.owj-footer ul { list-style: none; padding: 0; margin: 0; }
.owj-footer li { margin-bottom: 6px; }
.owj-footer a { color: var(--owj-muted); font-size: .91rem; }
.owj-footer a:hover { color: var(--owj-gold); }
.owj-legal {
    max-width: var(--owj-max); margin: 0 auto; padding: 18px 20px 30px;
    border-top: 1px solid var(--owj-line); font-size: .8rem; color: var(--owj-faint); line-height: 1.7;
}
.owj-legal a { color: var(--owj-faint); text-decoration: underline; }

@media print {
    .owj-topbar, .owj-footer, .btn, .prompt-chips, .pager { display: none !important; }
    body { background: #fff; }
    .card { box-shadow: none; }
}

.translation-note { font-size: .85rem; color: var(--owj-muted); }
.worksheet-lines { min-height: 180px; background: repeating-linear-gradient(transparent, transparent 35px, #ccd2da 36px); margin: 16px 0; }
:focus-visible { outline: 3px solid var(--owj-gold); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}