/* =============================================
   Tank Logic — about.css  NATURE THEME
   ============================================= */

.about-hero { position: relative; padding-top: calc(var(--nav-h) + 88px); padding-bottom: 80px; border-bottom: 1px solid var(--border); overflow: hidden; }
.about-hero__bg { position: absolute; inset: 0; pointer-events: none; }
.about-hero__glow { position: absolute; width: 600px; height: 400px; top: -100px; left: 50%; transform: translateX(-55%); border-radius: 50%; filter: blur(100px); background: radial-gradient(ellipse, rgba(45,122,58,0.07) 0%, transparent 70%); }
.about-hero__glow--blue { background: radial-gradient(ellipse, rgba(42,127,168,0.07) 0%, transparent 70%); }
.about-hero__inner { position: relative; z-index: 1; max-width: 620px; }
.about-hero__kicker { font-family: var(--font-head); font-size: var(--sz-11); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.about-hero--contact .about-hero__kicker { color: var(--water); }
.about-hero__h1 { font-family: var(--font-head); font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.1; color: var(--tx-hi); margin-bottom: 20px; }
.about-hero__accent { background: linear-gradient(135deg, var(--accent) 0%, var(--leaf) 50%, var(--water) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-hero__accent--blue { background: linear-gradient(135deg, var(--water) 0%, var(--leaf) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-hero__sub { font-size: var(--sz-16); color: var(--tx-lo); line-height: 1.68; max-width: 520px; margin-bottom: 24px; }

.contact-hero-email { display: inline-flex; align-items: center; gap: 9px; font-size: var(--sz-14); font-weight: 500; color: var(--tx); text-decoration: none; background: var(--bg-1); border: 1px solid var(--border-mid); border-radius: var(--r-lg); padding: 10px 16px; box-shadow: var(--shadow-sm); transition: border-color var(--t), color var(--t); }
.contact-hero-email:hover { border-color: var(--border-hi); color: var(--tx-hi); }

.about-stats-bar { border-bottom: 1px solid var(--border); background: var(--bg-2); padding-block: 22px; }
.about-stats-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0; }
.about-stat { display: flex; flex-direction: column; gap: 2px; padding: 8px 28px 8px 0; margin-right: 28px; }
.about-stat:last-child { padding-right: 0; margin-right: 0; }
.about-stat__num   { font-family: var(--font-head); font-size: var(--sz-20); font-weight: 800; color: var(--tx-hi); letter-spacing: -0.03em; line-height: 1; }
.about-stat__label { font-size: var(--sz-11); color: var(--tx-xlo); font-weight: 500; }
.about-stat__sep   { width: 1px; height: 28px; background: var(--border-mid); flex-shrink: 0; margin-right: 28px; }

.about-content { padding-block: 72px; }
.about-grid    { display: grid; grid-template-columns: 1fr; gap: 44px; align-items: start; }
.about-body    { min-width: 0; }
.about-section { margin-bottom: 56px; }
.about-section:last-child { margin-bottom: 0; }
.about-section__kicker { font-family: var(--font-head); font-size: var(--sz-10); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.about-section__title  { font-family: var(--font-head); font-size: clamp(1.3rem, 2.5vw, 1.75rem); font-weight: 800; letter-spacing: -0.028em; line-height: 1.2; color: var(--tx-hi); margin-bottom: 18px; }
.about-section p   { font-size: var(--sz-15); color: var(--tx); line-height: 1.8; margin-bottom: 16px; }
.about-section p:last-child { margin-bottom: 0; }
.about-section a   { color: var(--water); text-decoration: underline; text-underline-offset: 2px; }
.about-section a:hover { color: var(--accent); }

.about-features { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r-xl); overflow: hidden; margin-top: 4px; box-shadow: var(--shadow-sm); }
.about-feature  { display: flex; align-items: flex-start; gap: 16px; background: var(--bg-1); padding: 20px 22px; transition: background 160ms; }
.about-feature:hover { background: var(--bg-2); }
.about-feature__icon { width: 36px; height: 36px; border-radius: 9px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.about-feature__icon--teal   { background: var(--accent-lo); color: var(--accent); }
.about-feature__icon--blue   { background: var(--water-lo);  color: var(--water);  }
.about-feature__icon--gold   { background: var(--gold-lo);   color: var(--gold);   }
.about-feature__icon--purple { background: var(--purple-lo); color: var(--purple); }
.about-feature__title { font-family: var(--font-head); font-size: var(--sz-14); font-weight: 700; color: var(--tx-hi); margin-bottom: 5px; }
.about-feature__desc  { font-size: var(--sz-13); color: var(--tx-lo); line-height: 1.65; margin: 0; }

.contact-reasons { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r-xl); overflow: hidden; margin-top: 4px; box-shadow: var(--shadow-sm); }
.contact-reason  { display: flex; align-items: flex-start; gap: 14px; background: var(--bg-1); padding: 20px 22px; transition: background 160ms; }
.contact-reason:hover { background: var(--bg-2); }
.contact-reason__icon { width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px; }
.contact-reason__icon--red  { background: rgba(201,64,64,0.1);  color: var(--red);    }
.contact-reason__icon--teal { background: var(--accent-lo);     color: var(--accent); }
.contact-reason__icon--blue { background: var(--water-lo);      color: var(--water);  }
.contact-reason__icon--gold { background: var(--gold-lo);       color: var(--gold);   }
.contact-reason__title { font-family: var(--font-head); font-size: var(--sz-14); font-weight: 700; color: var(--tx-hi); margin-bottom: 6px; }
.contact-reason__desc  { font-size: var(--sz-13); color: var(--tx-lo); line-height: 1.65; margin: 0; }

.contact-email-block { display: flex; align-items: flex-start; gap: 18px; background: linear-gradient(135deg, var(--water-lo), var(--bg-1)); border: 1px solid var(--water-mid); border-radius: var(--r-xl); padding: 22px 24px; margin-bottom: 48px; box-shadow: var(--shadow-sm); transition: border-color 160ms; }
.contact-email-block:hover { border-color: rgba(42,127,168,0.35); }
.contact-email-block__icon  { width: 44px; height: 44px; background: var(--water-lo); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--water); flex-shrink: 0; }
.contact-email-block__label { font-family: var(--font-head); font-size: var(--sz-11); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--tx-lo); margin-bottom: 5px; }
.contact-email-block__addr  { display: block; font-size: var(--sz-17); font-weight: 600; color: var(--water); text-decoration: none; letter-spacing: -0.015em; margin-bottom: 8px; transition: color var(--t); }
.contact-email-block__addr:hover { color: var(--accent); }
.contact-email-block__note  { font-size: var(--sz-12); color: var(--tx-lo); line-height: 1.55; margin: 0; }

.contact-faq { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r-xl); overflow: hidden; margin-top: 4px; }
.contact-faq-item { background: var(--bg-1); }
.contact-faq-item[open] { background: var(--bg-2); }
.contact-faq-q { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 17px 20px; cursor: pointer; font-family: var(--font-head); font-size: var(--sz-14); font-weight: 700; color: var(--tx-hi); list-style: none; user-select: none; transition: color 140ms; }
.contact-faq-q::-webkit-details-marker { display: none; }
.contact-faq-q:hover { color: var(--accent); }
.contact-faq-chevron { color: var(--tx-lo); flex-shrink: 0; transition: transform 200ms var(--ease); }
details[open] .contact-faq-chevron { transform: rotate(180deg); }
.contact-faq-a { padding: 0 20px 16px; border-top: 1px solid var(--border); }
.contact-faq-a p { font-size: var(--sz-14); color: var(--tx); line-height: 1.7; padding-top: 14px; margin: 0; }

.about-contact-cta { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 28px; margin-top: 56px; }
.about-contact-cta__title { font-family: var(--font-head); font-size: var(--sz-18); font-weight: 800; color: var(--tx-hi); margin-bottom: 8px; }
.about-contact-cta__sub   { font-size: var(--sz-14); color: var(--tx-lo); line-height: 1.65; margin-bottom: 16px; }
.about-contact-cta__email { display: inline-flex; align-items: center; gap: 9px; font-size: var(--sz-14); color: var(--accent); text-decoration: none; font-weight: 600; }
.about-contact-cta__email:hover { text-decoration: underline; }

.about-sidebar { display: flex; flex-direction: column; gap: 14px; }
.about-sidebar-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 20px; box-shadow: var(--shadow-sm); }
.about-sidebar-card--email { background: linear-gradient(135deg, var(--accent-lo), var(--bg-1)); border-color: var(--accent-mid); }
.about-sidebar-card__kicker { font-family: var(--font-head); font-size: var(--sz-10); font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--tx-lo); margin-bottom: 7px; }
.about-sidebar-card__title  { font-family: var(--font-head); font-size: var(--sz-14); font-weight: 700; color: var(--tx-hi); margin-bottom: 14px; }
.about-sidebar-card__note   { font-size: var(--sz-12); color: var(--tx-lo); line-height: 1.55; margin-top: 5px; }

.about-sidebar-links { display: flex; flex-direction: column; gap: 2px; list-style: none; padding: 0; }
.about-sidebar-link  { display: flex; align-items: center; gap: 9px; padding: 8px 9px; border-radius: var(--r-md); text-decoration: none; color: var(--tx-lo); font-size: var(--sz-13); font-weight: 500; transition: background 130ms, color 130ms; }
.about-sidebar-link:hover { background: var(--bg-2); color: var(--tx-hi); }
.about-sidebar-link__icon { width: 24px; height: 24px; border-radius: 6px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: transform 160ms var(--ease); }
.about-sidebar-link:hover .about-sidebar-link__icon { transform: scale(1.06); }
.about-sidebar-link__icon--teal   { background: var(--accent-lo); color: var(--accent); }
.about-sidebar-link__icon--blue   { background: var(--water-lo);  color: var(--water);  }
.about-sidebar-link__icon--gold   { background: var(--gold-lo);   color: var(--gold);   }
.about-sidebar-link__icon--purple { background: var(--purple-lo); color: var(--purple); }
.about-sidebar-link__dot   { width: 5px; height: 5px; border-radius: 50%; background: var(--tx-xlo); flex-shrink: 0; transition: background 130ms; }
.about-sidebar-link:hover .about-sidebar-link__dot { background: var(--accent); }
.about-sidebar-link__label { flex: 1; min-width: 0; }
.about-sidebar-link__arrow { font-size: 0.8rem; opacity: 0.4; transition: opacity 130ms, transform 130ms; }
.about-sidebar-link:hover .about-sidebar-link__arrow { opacity: 1; transform: translateX(2px); }
.about-sidebar-email__addr { display: block; font-size: var(--sz-15); font-weight: 600; color: var(--accent); text-decoration: none; letter-spacing: -0.01em; margin-bottom: 2px; }
.about-sidebar-email__addr:hover { text-decoration: underline; }
.about-sidebar-email__btn { margin-top: 12px; width: 100%; justify-content: center; }

.footer__inner { display: grid; grid-template-columns: 1fr; gap: 40px; padding-bottom: 44px; }
.footer__tagline { font-size: var(--sz-13); color: var(--tx-lo); line-height: 1.65; margin-top: 10px; margin-bottom: 10px; }
.footer__email   { font-size: var(--sz-12); color: var(--tx-lo); text-decoration: none; transition: color var(--t); }
.footer__email:hover { color: var(--accent); }
.footer__cols    { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.footer__col h4  { font-family: var(--font-head); font-size: var(--sz-10); font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--tx-lo); margin-bottom: 14px; }
.footer__col ul  { display: flex; flex-direction: column; gap: 9px; list-style: none; }
.footer__col a   { font-size: var(--sz-13); color: var(--tx-lo); text-decoration: none; transition: color var(--t); }
.footer__col a:hover { color: var(--accent); }
.footer__bottom  { display: flex; flex-direction: column; gap: 4px; padding-top: 22px; border-top: 1px solid var(--border); font-size: var(--sz-11); color: var(--tx-xlo); }
.footer__bottom-right { display: flex; gap: 16px; }
.footer__bottom-right a { color: var(--tx-xlo); text-decoration: none; transition: color var(--t); }
.footer__bottom-right a:hover { color: var(--tx-lo); }

@media (min-width: 860px) { .about-grid { grid-template-columns: 1fr 288px; } .footer__inner { grid-template-columns: 1fr 2fr; gap: 56px; } .footer__cols { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 640px) { .about-stats-row { flex-wrap: nowrap; } .footer__cols { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .about-hero { padding-top: calc(var(--nav-h) + 56px); padding-bottom: 52px; } .about-hero__h1 { font-size: 2rem; } .about-stat__sep { display: none; } .about-stat { padding-right: 16px; margin-right: 16px; } .about-content { padding-block: 48px; } .about-feature, .contact-reason { gap: 12px; padding: 16px; } }
@media (prefers-reduced-motion: reduce) { .about-feature, .contact-reason, .about-sidebar-link { transition: none !important; } }