@charset "UTF-8";
:root {
    --p-purp: #9b51e0; --p-blue: #2d9cdb; --a-red: #ff2a2a;
    --bg-d: #111; --bg-s: #1a1a1a; --tx-m: #fff; --tx-s: #ccc; --bd: #333;
}
body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-d); color: var(--tx-m); margin: 0; padding: 0; line-height: 1.8; font-size: 16px;
}
h1, h2, h3, h4 { margin: 0 0 1rem 0; font-weight: 700; line-height: 1.4; }
p { margin: 0 0 1.5rem 0; color: var(--tx-s); }

/* --- Shortened Utility Classes --- */
.c { max-width: 1000px; margin: 0 auto; padding: 0 20px; } /* container */
.tc { text-align: center; } /* text-center */
.mt40 { margin-top: 40px; }
.mt20 { margin-top: 20px; }
.h250 { height: 250px; }
.h300 { height: 300px; }
.h350 { height: 350px; }
.tr { color: #f00; } /* txt-red */
.tbr { font-weight: bold; color: #f00; margin-top: 20px; } /* txt-bold-red */

/* --- Layout Components --- */
/* intro-box -> inb */
.inb { padding: 40px; border-radius: 12px; margin-bottom: 40px; }

/* highlight-catch -> hc */
.hc {
    font-size: 2.2rem; text-align: center; color: var(--a-red); font-weight: 900;
    margin: 50px 0; line-height: 1.3; text-shadow: 0 0 20px rgba(255, 0, 0, 0.4);
}
@media (max-width: 768px) { .hc { font-size: 1.5rem; } }

/* grid-2 -> g2 */
.g2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 768px) { .g2 { grid-template-columns: 1fr; } }

/* img-box -> ib */
.ib {
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px; border-radius: 8px; overflow: hidden; position: relative;
}
.ib img { max-width: 100%; max-height: 100%; object-fit: contain; width: auto; height: auto; }
.ib a { width: 100%; height: 100%; align-items: center; justify-content: center; text-decoration: none; }

/* section-title -> st */
.st { font-size: 2.2rem; text-align: center; display: inline-block; }
.shw { text-align: center; margin-bottom: 60px; } /* section-header-wrapper */

/* Custom Headers */
.hcst { margin-bottom: 40px; font-size: 1.5rem; } /* header-custom */
.hw { color: #fff !important; border-color: #fff !important; margin: 0 !important; } /* header-white */

/* Card Showcase */
.cs { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; } /* card-showcase */
@media (max-width: 768px) { .cs { grid-template-columns: 1fr; } }

/* card-detail -> cd */
.cd {
    padding: 25px; border-radius: 12px;
    border: 1px solid #333; height: 100%; box-sizing: border-box;
}
.cd h3 { color: var(--p-blue); font-size: 1.4rem; margin-bottom: 5px; }
.cd h4 { font-size: 1rem; color: var(--tx-m); margin-bottom: 15px; border-bottom: 1px solid #444; padding-bottom: 10px; display: inline-block; }

/* card-ref -> cr */
.cr { font-size: 0.85rem; color: #888; margin-top: 10px; display: block; }

/* accessory-box -> ab */
.ab { background: rgba(45, 156, 219, 0.05); padding: 40px; border-radius: 12px; }

/* marker-usage -> mu */
.mu { margin-top: 40px; padding: 20px; border-radius: 8px; }
.mg { display: flex; justify-content: center; gap: 20px; margin-top: 20px; } /* marker-gallery */
.mg img { max-width: 48%; height: auto; border-radius: 4px; }
@media (max-width: 768px) { .mg { flex-direction: column; align-items: center; } .mg img { max-width: 100%; } }

/* --- Accordion & Strategy --- */
section { padding: 80px 0; border-bottom: 1px solid var(--bd); }
details {
    margin-bottom: 20px; background: rgba(255, 255, 255, 0.03);
    border-radius: 12px; border: 1px solid #333; overflow: hidden; transition: all 0.3s;
}
details[open] { border-color: var(--p-blue); background: transparent; }
summary { cursor: pointer; list-style: none; text-align: center; padding: 30px; position: relative; outline: none; }
summary::-webkit-details-marker { display: none; }
summary:hover { background: rgba(255, 255, 255, 0.05); }
summary::after {
    content: "▼ Details"; display: block; margin-top: 15px; color: var(--p-blue);
    font-size: 0.9rem; font-weight: bold; transition: transform 0.3s;
}
details[open] summary::after { content: "▲ Close"; color: var(--tx-s); }

/* accordion-content -> ac */
.ac { padding: 0 20px 40px 20px; animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* strategy-step -> ss */
.ss { padding: 40px; border-radius: 15px; border: 1px solid #333; }
.sl { font-size: 1.8rem; color: var(--p-purp); font-weight: bold; margin-bottom: 20px; display: block; } /* step-label */

/* img-box-step -> ibs */
.ibs { height: 400px; justify-content: space-evenly; align-items: flex-end; padding-bottom: 20px; }

/* img-item-wrap -> iw */
.iw {
    display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
    height: 100%; width: 30%; text-decoration: none; color: inherit; transition: opacity 0.3s;
}
.iw:hover { opacity: 0.8; }
.iw img { width: auto; height: auto; max-width: 100%; max-height: 80%; object-fit: contain; margin-bottom: 8px; }

/* img-caption -> ic */
.ic { font-size: 0.75rem; line-height: 1.4; text-align: center; color: #cccccc; text-decoration: none; }
.ic a { color: #ccc; text-decoration: none; }

/* Step 2 Special Grid (s2g) */
.s2g { display: grid; grid-template-columns: 3fr 1.2fr; gap: 15px; }
@media (max-width: 768px) { .s2g { grid-template-columns: 1fr; } }

/* Vertical Image Set (ibv) */
.ibv {
    height: 400px; display: flex; flex-direction: column;
    justify-content: center; align-items: center; margin-bottom: 0;
}
.viw { height: 40%; margin-bottom: 5px; } /* v-img-wrap */
.viw.last { margin-bottom: 10px; }
.vl { display: block; height: 100%; } /* v-link */
.vi { height: 100%; width: auto; object-fit: contain; } /* v-img */