/* ============================================================
   JPJ 保濟元和集團 — DESIGN SYSTEM
   Single source of truth · tokens + container system
   Quiet Confidence · wabi-sabi · green / beige / gold
   Usage:  <link rel="stylesheet" href="design-system.css">
   All classes are namespaced `ds-` to avoid collisions.
   ============================================================ */

/* ─────────────────────────────────────────────
   1. DESIGN TOKENS
   ───────────────────────────────────────────── */
:root{
  /* — brand green (primary · JPJ logo) — */
  --green:#007049;          /* PRIMARY */
  --green-deep:#005537;     /* hover / pressed */
  --green-700:#0A6244;
  --botanical:#6FA684;      /* soft botanical — secondary accent */
  --sage:#9DB4A0;           /* muted sage — quiet tint */

  /* — pine (dark surfaces) — */
  --pine:#14392C;
  --pine-deep:#0F2E24;
  --forest:#2E5C4A;

  /* — light base (light-first) — */
  --white:#FFFFFF;
  --paper:#FCFAF5;
  --ivory:#F7F5F0;          /* page background */
  --sand:#F1EEE6;
  --stone:#E6E4DE;          /* hairlines / rules */

  /* — containers (beige / light brown 米色 · 淺啡) — */
  --beige:#EDE5D3;          /* primary container fill */
  --beige-deep:#DCCDB6;     /* natural sand */
  --clay:#D9C49C;           /* light brown panel */
  --bronze:#B08A5E;         /* warm bronze accent */
  --bronze-deep:#8F6F45;

  /* — gold (tint / accent · 金色) — */
  --gold:#A8853F;
  --gold-soft:#C6A468;
  --gold-hi:#D9C49C;

  /* — ink / text — */
  --ink:#2B2823;            /* headings */
  --char:#4B463D;           /* body */
  --faint:#8A8478;          /* muted / captions */

  /* — semantic surfaces (container fills) — */
  --surface-page:var(--ivory);
  --surface-raised:var(--paper);   /* default card / raised container */
  --surface-beige:var(--beige);
  --surface-sand:var(--beige-deep);
  --surface-clay:var(--clay);
  --surface-dark:var(--pine);

  /* — borders — */
  --hairline:1px solid var(--stone);
  --border-gold:1px solid rgba(176,138,94,.22);
  --border-gold-strong:1px solid rgba(176,138,94,.45);

  /* — type — */
  --serif:'Cormorant Garamond','Noto Serif TC',Georgia,'Songti TC',serif;
  --sans:'Karla','Noto Sans TC',-apple-system,'PingFang TC','Microsoft JhengHei',sans-serif;

  /* — motion — */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --dur:.45s;

  /* — radius (small · wabi-sabi restraint) — */
  --r-xs:2px; --r-sm:3px; --r-md:6px; --r-lg:12px; --r-pill:999px;

  /* — elevation (soft, warm) — */
  --sh-s:0 2px 10px rgba(43,40,35,.05);
  --sh-m:0 14px 40px -12px rgba(43,40,35,.14);
  --sh-l:0 30px 70px -24px rgba(43,40,35,.22);

  /* — spacing scale (8pt) — */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:64px; --s9:96px;

  /* — CONTAINER SYSTEM tokens — */
  --container-max:min(1160px,92vw);   /* content wrapper width */
  --container-narrow:min(760px,92vw); /* reading width */
  --container-radius:var(--r-lg);     /* container box radius */
  --card-radius:var(--r-sm);          /* card radius */
  --container-pad:clamp(24px,4vw,40px);
  --container-pad-sm:clamp(18px,3vw,26px);
  --container-pad-lg:clamp(32px,5vw,56px);
  --section-py:clamp(56px,8vw,96px);
  --section-py-tight:clamp(40px,6vw,64px);
}

/* ─────────────────────────────────────────────
   2. BASE  (opt-in via .ds-page — won't hijack existing markup)
   ───────────────────────────────────────────── */
.ds-page{
  font-family:var(--sans);
  background:var(--surface-page);
  color:var(--char);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
.ds-page :is(h1,h2,h3,h4){font-family:var(--serif);color:var(--pine);font-weight:500;line-height:1.2}
.ds-serif{font-family:var(--serif)}
.ds-sans{font-family:var(--sans)}
.ds-ink{color:var(--ink)}
.ds-muted{color:var(--faint)}
.ds-green{color:var(--green)}

/* ─────────────────────────────────────────────
   3. CONTAINER SYSTEM
   Layering model (outer → inner):
     .ds-band   → full-bleed background layer (page section colour)
       .ds-wrap → max-width content wrapper (gutters)
         .ds-section → vertical rhythm
           .ds-container / .ds-card → the beige/brown content boxes
             .ds-panel → nested flat sub-panel
   ───────────────────────────────────────────── */

/* 3a. WRAP — the horizontal gutter/measure. Use once per band. */
.ds-wrap{width:var(--container-max);margin-inline:auto}
.ds-wrap--narrow{width:var(--container-narrow)}

/* 3b. SECTION — vertical rhythm between blocks */
.ds-section{padding-block:var(--section-py)}
.ds-section--tight{padding-block:var(--section-py-tight)}

/* 3c. BAND — full-width background layer */
.ds-band{background:var(--surface-page)}
.ds-band--paper{background:var(--paper);border-block:var(--border-gold)}
.ds-band--sand{background:linear-gradient(180deg,var(--sand),var(--ivory))}
.ds-band--beige{background:var(--beige)}
.ds-band--pine{background:linear-gradient(160deg,var(--pine) 0%,var(--pine-deep) 100%);color:#CFC9BB}
.ds-band--pine :is(h1,h2,h3,h4){color:var(--ivory)}
.ds-band--pine .ds-eyebrow{color:var(--gold-soft)}

/* 3d. CONTAINER — the core content box (米色/淺啡容器)
      Base = raised paper. Modifiers set the surface fill. */
.ds-container{
  background:var(--surface-raised);
  border:var(--border-gold);
  border-radius:var(--container-radius);
  padding:var(--container-pad);
  box-shadow:var(--sh-s);
}
/* padding size modifiers */
.ds-container--sm{padding:var(--container-pad-sm)}
.ds-container--lg{padding:var(--container-pad-lg)}
/* surface (fill) modifiers */
.ds-container--paper{background:var(--surface-raised)}
.ds-container--beige{background:var(--surface-beige);border-color:rgba(176,138,94,.28)}
.ds-container--sand{background:var(--surface-sand);border-color:rgba(143,111,69,.28)}
.ds-container--clay{background:var(--surface-clay);border-color:rgba(143,111,69,.35)}
.ds-container--clay :is(h1,h2,h3,h4){color:var(--pine)}
.ds-container--pine{
  background:linear-gradient(150deg,var(--pine),var(--pine-deep));
  color:#CFC9BB;border-color:rgba(176,138,94,.25);box-shadow:var(--sh-m);
}
.ds-container--pine :is(h1,h2,h3,h4){color:var(--ivory)}
/* structure modifiers */
.ds-container--flat{box-shadow:none}
.ds-container--bare{border:0;box-shadow:none}
.ds-container--gold-top{position:relative;overflow:hidden}
.ds-container--gold-top::before{
  content:"";position:absolute;top:0;left:0;height:2px;width:100%;
  background:linear-gradient(90deg,var(--gold-soft),var(--gold));
}

/* 3e. CARD — interactive container (hover lift + gold hairline reveal) */
.ds-card{
  position:relative;background:var(--surface-raised);
  border:var(--border-gold);border-radius:var(--card-radius);
  padding:var(--container-pad-sm);overflow:hidden;
  transition:transform .5s var(--ease),box-shadow .5s var(--ease),border-color var(--dur);
}
.ds-card::after{
  content:"";position:absolute;top:0;left:0;height:2px;width:0;
  background:linear-gradient(90deg,var(--gold-soft),var(--gold));
  transition:width .6s var(--ease);
}
.ds-card:hover{transform:translateY(-6px);box-shadow:var(--sh-m);border-color:var(--border-gold-strong)}
.ds-card:hover::after{width:100%}
.ds-card--beige{background:var(--surface-beige)}
.ds-card--static:hover{transform:none}

/* 3f. PANEL — flat nested sub-panel inside a container */
.ds-panel{
  background:var(--sand);border-radius:var(--r-md);padding:var(--s5);
  border:var(--hairline);
}
.ds-panel--beige{background:var(--beige)}
.ds-panel--paper{background:var(--paper)}

/* 3g. GRID — container layout helpers */
.ds-grid{display:grid;gap:var(--s5)}
.ds-grid--2{grid-template-columns:repeat(2,1fr)}
.ds-grid--3{grid-template-columns:repeat(3,1fr)}
.ds-grid--4{grid-template-columns:repeat(4,1fr)}
.ds-grid--auto{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
@media(max-width:820px){
  .ds-grid--2,.ds-grid--3,.ds-grid--4{grid-template-columns:1fr}
}

/* ─────────────────────────────────────────────
   4. CORE COMPONENTS (shared vocabulary)
   ───────────────────────────────────────────── */
.ds-eyebrow{
  font-size:12.5px;letter-spacing:.38em;text-transform:uppercase;color:var(--gold);
  font-weight:700;display:inline-flex;align-items:center;gap:14px;
}
.ds-eyebrow::before{content:"";width:34px;height:1px;background:var(--gold-soft)}
.ds-rule{width:44px;height:2px;background:var(--gold-soft);border-radius:2px;margin:18px 0}

.ds-btn{
  display:inline-flex;align-items:center;gap:11px;padding:14px 28px;font-size:14.5px;
  letter-spacing:.12em;text-transform:uppercase;font-weight:600;border-radius:var(--r-xs);
  border:1px solid transparent;transition:all var(--dur) var(--ease);cursor:pointer;font-family:var(--sans);
}
.ds-btn--primary{background:var(--green);color:var(--ivory)}
.ds-btn--primary:hover{background:var(--green-deep)}
.ds-btn--pine{background:var(--pine);color:#EDE5D3}
.ds-btn--pine:hover{background:var(--green)}
.ds-btn--ghost{border-color:rgba(0,112,73,.4);color:var(--green-deep);background:transparent}
.ds-btn--ghost:hover{border-color:var(--green);background:rgba(0,112,73,.06)}
.ds-btn--gold{background:var(--gold);color:var(--ivory)}
.ds-btn--gold:hover{background:var(--bronze-deep)}

.ds-tlink{
  display:inline-flex;align-items:center;gap:10px;color:var(--green);font-size:14.5px;
  letter-spacing:.14em;text-transform:uppercase;font-weight:600;padding-bottom:6px;
  border-bottom:1px solid var(--gold-soft);transition:all var(--dur) var(--ease);
}
.ds-tlink:hover{color:var(--gold)}

.ds-chip{
  display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(176,138,94,.4);
  border-radius:var(--r-pill);padding:8px 18px;font-size:14px;color:var(--pine);
  background:var(--paper);transition:all .35s var(--ease);
}
.ds-chip:hover{background:var(--pine);color:var(--beige);border-color:var(--pine)}
.ds-tag{
  display:inline-block;font-size:12px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);border:1px solid rgba(168,133,63,.45);border-radius:var(--r-pill);padding:5px 14px;
}

/* form fields inside containers */
.ds-field{
  width:100%;background:var(--paper);border:1px solid rgba(176,138,94,.32);
  border-radius:var(--r-xs);padding:14px 16px;font-family:inherit;font-size:16px;
  color:var(--ink);transition:all .3s;
}
.ds-field:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(0,112,73,.09)}

/* ─────────────────────────────────────────────
   5. NAVIGATION — minimal bar + full-screen overlay menu
   Structure:
     .ds-menubar  → logo (left) + .ds-menu-btn (right)
     .ds-overlay  → full-screen menu revealed on toggle
   Toggle by adding `.is-open` to .ds-menu-btn AND .ds-overlay,
   and `.ds-nav-open` to <body> (locks scroll, clears header chrome).
   ───────────────────────────────────────────── */

/* 5a. MENU BAR — sits inside the fixed page header */
.ds-menubar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:var(--container-max);margin-inline:auto;
}

/* 5b. MENU BUTTON — hamburger stacked over a label; morphs to an ✕ + CLOSE */
.ds-menu-btn{
  display:inline-flex;flex-direction:column;align-items:center;gap:8px;
  background:none;border:0;padding:6px 2px;cursor:pointer;position:relative;
  color:var(--pine);
}
.ds-menu-btn__ico{display:block;width:30px;height:15px;position:relative}
.ds-menu-btn__ico span{
  position:absolute;left:0;height:1.6px;width:100%;background:currentColor;border-radius:2px;
  transition:transform .5s var(--ease),opacity .3s var(--ease);
}
.ds-menu-btn__ico span:nth-child(1){top:0}
.ds-menu-btn__ico span:nth-child(2){top:6.7px}
.ds-menu-btn__ico span:nth-child(3){top:13.4px}
.ds-menu-btn__lbl{
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;font-weight:700;
  color:currentColor;
}
.ds-menu-btn:hover{color:var(--green)}
/* open state → ✕ */
.ds-menu-btn.is-open .ds-menu-btn__ico span:nth-child(1){transform:translateY(6.7px) rotate(45deg)}
.ds-menu-btn.is-open .ds-menu-btn__ico span:nth-child(2){opacity:0}
.ds-menu-btn.is-open .ds-menu-btn__ico span:nth-child(3){transform:translateY(-6.7px) rotate(-45deg)}

/* 5c. OVERLAY — full-screen menu */
.ds-overlay{
  position:fixed;inset:0;z-index:940;
  background:linear-gradient(180deg,var(--ivory) 0%,var(--sand) 100%);
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .55s var(--ease),visibility .55s var(--ease);
}
.ds-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
/* soft grain / vignette to keep the wabi-sabi warmth */
.ds-overlay::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 80% at 80% 0%,transparent 60%,rgba(20,57,44,.05));
}

/* 5c-i. inner two-column grid: brand aside (left) · nav (right) */
.ds-overlay__inner{
  position:relative;z-index:1;flex:1;
  width:var(--container-max);margin-inline:auto;
  display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(30px,6vw,90px);align-items:center;
  padding-block:clamp(112px,15vh,168px) 32px;
}
.ds-overlay__aside{align-self:center;max-width:34ch}
.ds-overlay__aside .ds-eyebrow{margin-bottom:22px}
.ds-overlay__statement{
  font-family:var(--serif);font-size:clamp(1.3rem,2vw,1.7rem);line-height:1.5;color:var(--pine);
}
.ds-overlay__emblem{
  margin-top:34px;width:clamp(120px,14vw,168px);aspect-ratio:1;position:relative;color:var(--green);
}
.ds-overlay__emblem::before{
  content:"";position:absolute;inset:0;border:1px solid rgba(176,138,94,.4);border-radius:50%;
}
.ds-overlay__emblem svg{position:absolute;inset:26%;width:48%;height:48%}

/* 5c-ii. nav list — two columns of serif links, staggered reveal */
.ds-overlay__nav{display:grid;grid-template-columns:1fr 1fr;gap:2px 44px}
.ds-overlay__link{
  display:flex;align-items:baseline;gap:16px;white-space:nowrap;
  font-family:var(--serif);font-size:clamp(1.45rem,2.1vw,1.85rem);color:var(--pine);
  padding:15px 4px;border-bottom:1px solid rgba(176,138,94,.16);
  opacity:0;transform:translateY(20px);
  transition:color .4s var(--ease);
}
.ds-overlay.is-open .ds-overlay__link{
  opacity:1;transform:none;
  transition:opacity .6s var(--ease) var(--d,0s),transform .6s var(--ease) var(--d,0s),color .4s var(--ease);
}
.ds-overlay__link:hover,.ds-overlay__link.active{color:var(--green)}
.ds-overlay__link.active .ar{opacity:1;transform:none}
.ds-overlay__link .no{
  font-family:var(--sans);font-size:12.5px;letter-spacing:.18em;color:var(--gold);font-weight:700;
  flex:none;transform:translateY(-.3em);
}
.ds-overlay__link .ar{margin-left:auto;color:var(--gold);opacity:0;transform:translateX(-8px);transition:all .4s var(--ease)}
.ds-overlay__link:hover .ar{opacity:1;transform:none}

/* 5c-iii. overlay footer — language + socials + address */
.ds-overlay__foot{
  position:relative;z-index:1;
  width:var(--container-max);margin-inline:auto;
  border-top:1px solid rgba(176,138,94,.22);
  padding:20px 0 clamp(20px,4vh,34px);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.ds-overlay__socials{display:none;gap:12px} /* hidden until social accounts go live */
.ds-overlay__socials a{
  width:40px;height:40px;border:1px solid rgba(176,138,94,.4);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--pine);transition:all .35s var(--ease);
}
.ds-overlay__socials a:hover{background:var(--pine);color:var(--ivory);border-color:var(--pine)}
.ds-overlay__socials svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.5}
.ds-overlay__addr{font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--faint)}

/* 5c-iv. language switch (shared) */
.ds-lang{display:flex;border:1px solid rgba(176,138,94,.4);border-radius:var(--r-xs);overflow:hidden}
.ds-lang button{
  background:transparent;border:0;padding:8px 15px;font-size:13.5px;letter-spacing:.1em;
  color:var(--faint);font-weight:700;cursor:pointer;transition:all .3s;font-family:var(--sans);
}
.ds-lang button.on{background:var(--pine);color:var(--ivory)}

body.ds-nav-open{overflow:hidden}

@media(max-width:820px){
  /* let the sheet scroll if the 8 links + footer exceed a short screen, and
     start content from the top (centring clipped the footer — language switch,
     socials, address — off the bottom on phones) */
  .ds-overlay{overflow-y:auto}
  .ds-overlay__inner{
    grid-template-columns:1fr;gap:0;align-content:start;
    padding-block:clamp(84px,12vh,104px) 20px;   /* clear the fixed header, no more */
  }
  .ds-overlay__aside{display:none}
  .ds-overlay__nav{grid-template-columns:1fr}
  .ds-overlay__link{font-size:clamp(1.4rem,6vw,1.8rem);padding:13px 4px}
  .ds-overlay__foot{padding-top:18px;row-gap:14px}
}