/*
Theme Name: FrostCard
Theme URI: https://coolwallet.asia/
Author: CoolWallet.Asia Editorial
Description: Frost-blue editorial theme for the independent CoolWallet guide.
Version: 1.2.0
Requires at least: 6.0
Tested up to: 6.7
License: GNU General Public License v2 or later
Text Domain: frostcard
*/

:root{
  --frost:#eef4fa;
  --paper:#f7fafd;
  --card:#ffffff;
  --ink:#0b1c2e;
  --ink-soft:#33475c;
  --muted:#5d7288;
  --line:#d7e3ee;
  --cobalt:#1d4ed8;
  --cobalt-deep:#14337f;
  --cobalt-ink:#0e2354;
  --sky:#3b82f6;
  --ice:#bfdcf5;
  --glow:#7cc6f4;
  --amber:#b45309;
  --amber-bg:#fdf3e3;
  --note-bg:#e8f2fb;
  --radius:14px;
  --shadow:0 10px 30px -12px rgba(13,42,80,.18);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","PingFang TC","Hiragino Sans","Microsoft JhengHei",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.75;font-size:17px}
img{max-width:100%;height:auto;border-radius:10px}
a{color:var(--cobalt);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--cobalt-deep)}
h1,h2,h3,h4{line-height:1.25;color:var(--cobalt-ink);letter-spacing:-.01em}
h2{font-size:clamp(1.45rem,3.2vw,1.85rem);margin:2.2em 0 .7em;padding-top:.4em}
h3{font-size:clamp(1.12rem,2.4vw,1.3rem);margin:1.6em 0 .5em}
p{margin:.9em 0}
code{background:var(--frost);border:1px solid var(--line);border-radius:6px;padding:.08em .4em;font-size:.92em;color:var(--cobalt-deep)}
.screen-reader-text{position:absolute!important;clip:rect(1px,1px,1px,1px);width:1px;height:1px;overflow:hidden}
.skip-link{left:8px;top:8px;z-index:99}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,250,253,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.frost-header-inner{max-width:1240px;margin:0 auto;padding:.55rem 1rem;display:flex;align-items:center;gap:.7rem}
.site-branding{display:flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--cobalt-ink);flex:none}
.frost-logo{color:var(--cobalt);flex:none}
.site-title{font-weight:800;font-size:1.12rem;white-space:nowrap;letter-spacing:-.02em}
.site-title em{font-style:normal;color:var(--cobalt)}
.site-tagline{display:none;font-size:.72rem;color:var(--muted);border-left:1px solid var(--line);padding-left:.55rem;white-space:nowrap}
@media(min-width:1360px){.site-tagline{display:inline}}
.main-navigation{margin-left:auto}
.main-navigation ul{list-style:none;display:flex;gap:.15rem;margin:0;padding:0;flex-wrap:wrap}
.main-navigation a{display:block;padding:.4rem .48rem;border-radius:8px;text-decoration:none;color:var(--ink-soft);font-size:.83rem;font-weight:600;white-space:nowrap}
.main-navigation a:hover{background:var(--frost);color:var(--cobalt-deep)}
.current-menu-item a{background:var(--frost);color:var(--cobalt)}
.frost-header-actions{display:flex;align-items:center;gap:.6rem;flex:none}
.frost-btn{display:inline-block;border-radius:999px;font-weight:700;text-decoration:none;text-align:center;transition:transform .15s ease,box-shadow .15s ease}
.frost-btn:hover{transform:translateY(-1px)}
.frost-btn-header{background:linear-gradient(120deg,var(--cobalt),var(--sky));color:#fff;padding:.45rem 1rem;font-size:.85rem;box-shadow:0 4px 14px -4px rgba(29,78,216,.5)}
.frost-btn-header:hover{color:#fff}
.frost-btn-solid{background:linear-gradient(120deg,var(--cobalt),var(--sky));color:#fff;padding:.72rem 1.5rem;font-size:1rem;box-shadow:0 8px 22px -6px rgba(29,78,216,.55)}
.frost-btn-solid:hover{color:#fff}
.frost-nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:.5rem .55rem;cursor:pointer;margin-left:auto}
.frost-nav-toggle span{display:block;width:18px;height:2px;background:var(--cobalt-ink);margin:3.5px 0;border-radius:2px;transition:.2s}

/* language switcher */
.frost-lang{position:relative}
.frost-lang-btn{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.4rem .8rem;font-size:.82rem;font-weight:600;color:var(--ink-soft);cursor:pointer}
.frost-lang-list{position:absolute;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);list-style:none;margin:0;padding:.35rem;min-width:150px;display:none;z-index:60}
.frost-lang.open .frost-lang-list{display:block}
.frost-lang-list a{display:block;padding:.4rem .7rem;border-radius:8px;text-decoration:none;font-size:.88rem;color:var(--ink-soft)}
.frost-lang-list a:hover{background:var(--frost)}
.frost-lang-list a.is-active{color:var(--cobalt);font-weight:700}

/* ---------- hero ---------- */
.frost-hero{background:linear-gradient(160deg,var(--cobalt-ink) 0%,#123a8f 55%,#1d4ed8 100%);color:#e8f1fb;position:relative;overflow:hidden}
.frost-hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 300px at 85% -20%,rgba(124,198,244,.35),transparent 60%),
  radial-gradient(500px 260px at -10% 110%,rgba(59,130,246,.28),transparent 60%);pointer-events:none}
.frost-hero-inner{max-width:1180px;margin:0 auto;padding:2.6rem 1rem 2.8rem;display:grid;gap:2rem;position:relative}
.frost-hero.is-home .frost-hero-inner{grid-template-columns:1.25fr .75fr;align-items:center}
.frost-hero h1{color:#fff;font-size:clamp(1.7rem,4.6vw,2.6rem);margin:.3em 0 .4em}
.frost-hero-lead{font-size:clamp(1rem,2.2vw,1.13rem);color:#cfe2f6;max-width:46em;margin:0 0 1.4em}
.frost-hero-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.frost-hero-meta{font-size:.76rem;color:#9dbcdd;margin-top:1.4em;max-width:46em}
.frost-crumbs{font-size:.8rem;color:#9dbcdd}
.frost-crumbs a{color:#cfe2f6}
/* disclaimer chip + tooltip */
.frost-chip{position:relative;font-size:.74rem;color:#a9c6e4;border:1px dashed rgba(169,198,228,.55);border-radius:999px;padding:.3rem .75rem;cursor:help;white-space:nowrap}
.frost-chip-tip{position:absolute;left:0;bottom:calc(100% + 10px);width:min(320px,78vw);background:#fff;color:var(--ink-soft);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:.7rem .9rem;font-size:.78rem;line-height:1.55;display:none;z-index:40;white-space:normal}
.frost-chip:hover .frost-chip-tip,.frost-chip:focus .frost-chip-tip{display:block}
/* hero card art */
.frost-hero-art{display:flex;justify-content:center}
.frost-card-art{width:min(300px,80%);aspect-ratio:1.586;border-radius:16px;position:relative;transform:rotate(-6deg);
  background:linear-gradient(135deg,#0c2a5e,#1d4ed8 60%,#7cc6f4 130%);
  box-shadow:0 24px 50px -18px rgba(2,16,44,.7),inset 0 1px 0 rgba(255,255,255,.25);border:1px solid rgba(255,255,255,.18)}
.frost-card-chip{position:absolute;left:9%;top:16%;width:19%;height:19%;border-radius:6px;background:linear-gradient(135deg,#dbeafe,#93c5fd);opacity:.9}
.frost-card-flake{position:absolute;right:8%;top:10%;font-size:1.5rem;color:rgba(255,255,255,.85)}
.frost-card-num{position:absolute;left:9%;bottom:14%;font-size:.95rem;letter-spacing:.22em;color:#dbeafe;font-weight:600}
@media(max-width:860px){.frost-hero.is-home .frost-hero-inner{grid-template-columns:1fr}.frost-hero-art{order:-1;margin-top:-.4rem}.frost-card-art{width:min(230px,60%)}}

/* ---------- main ---------- */
.site-main{max-width:820px;margin:0 auto;padding:1.4rem 1rem 3rem}
.entry-content>*:first-child{margin-top:1rem}
.frost-figure{margin:1.6rem 0;text-align:center}
.frost-figure img{box-shadow:var(--shadow)}
.wp-element-caption{font-size:.8rem;color:var(--muted);margin-top:.5rem}
.frost-section{scroll-margin-top:84px}

/* toc */
.frost-toc{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--cobalt);border-radius:var(--radius);padding:1rem 1.3rem;margin:1.6rem 0;box-shadow:var(--shadow)}
.frost-toc-title{font-weight:800;color:var(--cobalt-ink);margin:0 0 .4em;font-size:.95rem;text-transform:uppercase;letter-spacing:.06em}
.frost-toc ol{margin:0;padding-left:1.2em;columns:2;column-gap:2rem;font-size:.92rem}
.frost-toc li{margin:.25em 0;break-inside:avoid}
.frost-toc a{text-decoration:none}
.frost-toc a:hover{text-decoration:underline}
@media(max-width:640px){.frost-toc ol{columns:1}}

/* boxes */
.frost-note{background:var(--note-bg);border:1px solid var(--ice);border-radius:var(--radius);padding:.9rem 1.2rem;margin:1.3rem 0}
.frost-note p{margin:.3em 0}
blockquote.frost-warning{margin:1.5rem 0;background:var(--amber-bg);border:1px solid #f3d9ac;border-left:5px solid var(--amber);border-radius:var(--radius);padding:1rem 1.3rem;color:#7c3f0c}
blockquote.frost-warning p{margin:.3em 0}
blockquote.frost-warning strong{color:#92400e}
blockquote:not(.frost-warning){margin:1.5rem 0;border-left:4px solid var(--ice);padding:.2rem 1.2rem;color:var(--ink-soft);font-style:italic}

/* tables */
.frost-table-wrap{overflow-x:auto;margin:1.5rem 0;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
table{border-collapse:collapse;width:100%;font-size:.92rem;background:var(--card);min-width:520px}
thead th{background:linear-gradient(120deg,var(--cobalt-ink),var(--cobalt));color:#fff;text-align:left;padding:.7rem .9rem;font-size:.85rem;letter-spacing:.02em}
tbody td,tbody th{padding:.65rem .9rem;border-top:1px solid var(--line);vertical-align:top;text-align:left}
tbody tr:nth-child(even){background:var(--paper)}

/* lists */
.entry-content ul,.entry-content ol{padding-left:1.4em}
.entry-content li{margin:.4em 0}
.entry-content ol>li::marker{color:var(--cobalt);font-weight:700}

/* faq */
.frost-faq{margin:2.5rem 0 1rem}
.frost-faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:.7rem 0;overflow:hidden}
.frost-faq-item summary{cursor:pointer;padding:.85rem 1.2rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.frost-faq-item summary::-webkit-details-marker{display:none}
.frost-faq-item summary::after{content:"＋";color:var(--cobalt);font-weight:700;flex:none}
.frost-faq-item[open] summary::after{content:"－"}
.frost-faq-item summary h3{margin:0;font-size:1rem}
.frost-faq-a{padding:0 1.2rem 1rem;color:var(--ink-soft)}

/* cta banner */
.frost-cta{margin:2.2rem auto;max-width:820px;padding:0 1rem}
.site-main .frost-cta{padding:0}
.frost-cta-inner{background:linear-gradient(150deg,var(--cobalt-ink),#123a8f 60%,var(--cobalt));border-radius:18px;padding:1.6rem 1.8rem;color:#dbeafe;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.frost-cta-inner::after{content:"❄";position:absolute;right:-14px;top:-26px;font-size:7rem;opacity:.08}
.frost-cta-title{font-size:1.2rem;font-weight:800;color:#fff;margin:0 0 .4em}
.frost-cta-text{margin:0 0 1.1em;font-size:.95rem;max-width:44em}
.frost-cta .frost-btn-solid{background:#fff;color:var(--cobalt-deep);box-shadow:0 8px 22px -8px rgba(0,0,0,.4)}
.frost-cta .frost-btn-solid:hover{color:var(--cobalt-ink)}

/* related */
.frost-related{max-width:820px;margin:1rem auto 3rem}
.frost-related h2{font-size:1.2rem}
.frost-related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.8rem}
.frost-related-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.9rem 1.1rem;text-decoration:none;font-weight:700;color:var(--cobalt-ink);display:flex;justify-content:space-between;align-items:center;gap:.5rem;box-shadow:var(--shadow);transition:transform .15s}
.frost-related-card:hover{transform:translateY(-2px);color:var(--cobalt)}
.frost-related-card span{color:var(--cobalt)}

/* ---------- footer ---------- */
.site-footer{background:var(--cobalt-ink);color:#b9cfe8;margin-top:2rem}
.frost-footer-inner{max-width:1180px;margin:0 auto;padding:2.6rem 1rem 1.2rem;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:2rem}
.frost-footer-col .site-title{color:#fff;font-size:1.15rem;margin:0 0 .3em}
.frost-footer-col p{font-size:.86rem;margin:.3em 0}
.frost-footer-h{font-weight:800;color:#fff;text-transform:uppercase;font-size:.76rem;letter-spacing:.08em}
.frost-footer-col ul{list-style:none;margin:0;padding:0}
.frost-footer-col li{margin:.35em 0}
.frost-footer-col a{color:#b9cfe8;text-decoration:none;font-size:.88rem}
.frost-footer-col a:hover{color:#fff;text-decoration:underline}
.frost-footer-legal{border-top:1px solid rgba(185,207,232,.2);max-width:1180px;margin:0 auto;padding:1.1rem 1rem 1.6rem}
.frost-footer-legal p{font-size:.74rem;color:#8fabcc;margin:.4em 0;line-height:1.6}
.frost-footer-legal a{color:#b9cfe8}
@media(max-width:900px){.frost-footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.frost-footer-inner{grid-template-columns:1fr}}

/* ---------- mobile nav ---------- */
@media(max-width:1020px){
  .frost-nav-toggle{display:block;order:3}
  .frost-header-actions{order:2;margin-left:auto}
  .main-navigation{order:4;display:none;width:100%}
  .site-header.nav-open .main-navigation{display:block}
  .frost-header-inner{flex-wrap:wrap}
  .main-navigation ul{flex-direction:column;padding:.4rem 0 .6rem}
  .main-navigation a{font-size:1rem;padding:.6rem .4rem;border-bottom:1px solid var(--frost)}
  .site-header.nav-open .frost-nav-toggle span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
  .site-header.nav-open .frost-nav-toggle span:nth-child(2){opacity:0}
  .site-header.nav-open .frost-nav-toggle span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
}
@media(max-width:560px){
  .frost-btn-header{display:none}
  body{font-size:16px}
}