/**
 * IA Webtech Design System — 03 COMPONENTS
 * Button system, card system, tags/chips, forms, timeline, FAQ, notices.
 * One coherent geometry: border-led, subtle shadow, moderate radius.
 * No glassmorphism, no pills-everywhere, no icon-style mixing.
 */

/* ============ BUTTONS ============ */
/* Primary: green bg + white text (6.28:1, AA). Secondary: light bg + black border. */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-weight:700;font-size:1rem;line-height:1.2;border-radius:12px;padding:15px 26px;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:transform var(--duration-fast) var(--ease),box-shadow var(--duration-fast) var(--ease),background var(--duration-fast),border-color var(--duration-fast),color var(--duration-fast)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand-primary-600);color:#fff;box-shadow:0 10px 24px -12px rgba(37,110,43,.7)}
.btn-primary:hover{background:var(--brand-primary-700);color:#fff;box-shadow:var(--shadow-hover)}
.btn-secondary{background:var(--surface);border:1.5px solid var(--text-primary);color:var(--text-primary)}
.btn-secondary:hover{border-color:var(--brand-primary-600);color:var(--brand-primary-700)}
.btn-ghost{background:var(--surface);border-color:var(--border-strong);color:var(--text-primary)}
.btn-ghost:hover{border-color:var(--brand-primary-border);color:var(--brand-primary-700)}
.btn-dark{background:var(--text-primary);color:#fff}
.btn-dark:hover{background:#000;color:#fff}
.btn-light{background:#fff;color:var(--text-primary)}
.btn-light:hover{background:var(--brand-primary-soft)}
.btn-outline-light{border-color:var(--dark-line);color:var(--dark-text)}
.btn-outline-light:hover{border-color:var(--brand-primary);color:#fff}
.btn-sm{padding:12px 18px;font-size:.9rem;border-radius:10px}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* ============ CARDS ============ */
.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--brand-primary-border)}
.card h3{margin:12px 0 8px}
.card p{color:var(--text-muted);font-size:.97rem;margin:0 0 12px}
.card .go{font-weight:700;font-size:.92rem;color:var(--brand-primary-600);text-decoration:none}
.card .go:hover{color:var(--brand-primary-700)}
.card .tag{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-primary-600);background:var(--brand-primary-soft);border:1px solid var(--brand-primary-border);border-radius:var(--radius-pill);padding:4px 10px;margin-bottom:4px}
.icon-badge{width:44px;height:44px;border-radius:12px;background:var(--brand-primary-soft);border:1px solid var(--brand-primary-border);display:flex;align-items:center;justify-content:center;color:var(--brand-primary-600);font-size:1.25rem;font-weight:800}
.link-arrow{text-decoration:none;font-weight:700}
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--grid-gap)}
@media (max-width:860px){.pillars{grid-template-columns:1fr}}
.pillar{position:relative;overflow:hidden;border-radius:var(--radius-lg);padding:30px;border:1px solid var(--border);background:var(--surface)}
.pillar:hover{box-shadow:var(--shadow-hover)}
.pillar .num{font-size:3rem;font-weight:800;letter-spacing:-.04em;color:var(--brand-primary-soft);-webkit-text-stroke:1px var(--brand-primary-border);line-height:1}
.pillar.build{border-top:4px solid var(--text-primary)}
.pillar.modernize{border-top:4px solid var(--brand-primary)}
.pillar.automate{border-top:4px solid #0e7a6d}
.op-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:960px){.op-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.op-grid{grid-template-columns:1fr}}
.op{border:1px solid var(--border);border-radius:12px;padding:16px 18px;background:var(--surface);font-weight:600;display:flex;gap:10px;align-items:center}
.op::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--brand-primary);flex:0 0 9px}
.tech-group{border:1px solid var(--border);border-radius:var(--radius);padding:22px;background:var(--card-bg)}
.tech-group h3{font-size:1rem;margin:0 0 12px}
.tech-tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.tech-tags li{border:1px solid var(--border);background:var(--surface-muted);border-radius:8px;padding:6px 12px;font-size:.87rem;font-weight:600;color:var(--text-secondary)}
.chip{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-pill);padding:8px 14px;font-size:.85rem;font-weight:600;color:var(--text-secondary)}
.chip i{width:8px;height:8px;border-radius:50%;background:var(--brand-primary);display:inline-block}
.insight-card{display:flex;flex-direction:column}
.insight-card .kicker{font-size:.75rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-primary-600)}
.diag-quote{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--brand-primary-600);font-weight:800}
.empty{border:1.5px dashed var(--border-strong);border-radius:var(--radius);padding:28px;text-align:center;color:var(--text-muted);background:var(--surface-muted)}

/* ============ TIMELINE ============ */
.timeline{list-style:none;margin:0;padding:0;display:grid;gap:0;counter-reset:step}
.timeline li{position:relative;padding:0 0 26px 56px}
.timeline li::before{counter-increment:step;content:"0" counter(step);position:absolute;left:0;top:0;width:42px;height:42px;border-radius:12px;background:var(--text-primary);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.timeline li:not(:last-child)::after{content:"";position:absolute;left:20px;top:46px;bottom:0;width:2px;background:var(--border)}
.timeline li:nth-child(even)::before{background:var(--brand-primary-600)}
.timeline h3{margin:2px 0 6px}
.timeline p{color:var(--text-muted);margin:0;max-width:60ch}

/* ============ FAQ ============ */
.faq{border:1px solid var(--border);border-radius:12px;background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 20px;font-weight:700;list-style:none;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand-primary-600);font-weight:800}
.faq[open] summary::after{content:"–"}
.faq .faq-a{padding:0 20px 20px;color:var(--text-muted)}

/* ============ NOTICES ============ */
.notice{border:1px solid var(--border);border-left:4px solid var(--brand-primary);border-radius:12px;padding:14px 18px;background:var(--surface-muted);color:var(--text-secondary)}
.notice.is-success{border-left-color:var(--success);background:var(--success-bg)}
.notice.is-warning{border-left-color:var(--warning);background:var(--warning-bg)}
.notice.is-error{border-left-color:var(--error);background:var(--error-bg)}

/* ============ FORMS ============ */
.form-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:clamp(22px,3vw,36px)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}
label.flabel{display:block;font-weight:700;font-size:.9rem;margin:0 0 6px}
input.fin,select.fin,textarea.fin{width:100%;border:1px solid var(--border-strong);border-radius:10px;padding:12px 14px;font:inherit;background:var(--surface);color:var(--text-primary);min-height:44px}
input.fin:focus,select.fin:focus,textarea.fin:focus{border-color:var(--brand-primary);outline:2px solid var(--brand-primary-border)}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
.checks{display:flex;flex-wrap:wrap;gap:10px}
.check{display:inline-flex;cursor:pointer}
.check input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.check span{display:inline-flex;align-items:center;min-height:44px;border:1.5px solid var(--border-strong);background:var(--surface);border-radius:var(--radius-pill);padding:10px 18px;font-weight:600;font-size:.92rem;color:var(--text-secondary);transition:border-color var(--duration-fast),background var(--duration-fast),color var(--duration-fast)}
.check:hover span{border-color:var(--brand-primary)}
.check input:checked+span{background:var(--brand-primary-soft);border-color:var(--brand-primary-600);color:var(--brand-primary-700)}
.check input:focus-visible+span{outline:3px solid var(--brand-primary);outline-offset:2px}
.fhelp{display:block;font-size:var(--text-small);color:var(--text-muted);margin-top:6px}
input[type=file].fin{padding:10px 12px}
.hp{position:absolute;left:-9999px;top:0;height:1px;overflow:hidden}

/* ============ AI ASSESSMENT WIDGET ============ */
.assess{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:clamp(22px,3vw,36px);max-width:760px}
.assess-progress{height:6px;border-radius:999px;background:var(--surface-sunken);overflow:hidden;margin-bottom:20px}
.assess-progress span{display:block;height:100%;width:0;background:var(--brand-primary);border-radius:999px;transition:width .3s var(--ease)}
.assess-kicker{font-size:var(--text-caption);font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-primary-600);margin:0 0 10px}
.assess-q{border:0;margin:0 0 18px;padding:0}
.assess-q legend{font-size:clamp(1.2rem,2.4vw,1.6rem);font-weight:740;letter-spacing:-.015em;margin-bottom:14px;padding:0}
.assess-q.needs-answer legend{color:var(--error)}
.assess-opts{display:flex;flex-wrap:wrap;gap:10px}
.opt{border:1.5px solid var(--border-strong);background:var(--surface);border-radius:var(--radius-pill);padding:12px 20px;font:inherit;font-weight:600;font-size:.95rem;color:var(--text-secondary);cursor:pointer;min-height:44px;transition:border-color var(--duration-fast),background var(--duration-fast),color var(--duration-fast)}
.opt:hover{border-color:var(--brand-primary)}
.opt[aria-pressed="true"]{background:var(--brand-primary-soft);border-color:var(--brand-primary-600);color:var(--brand-primary-700)}
.assess-select{width:100%;max-width:420px;border:1.5px solid var(--border-strong);border-radius:10px;padding:13px 14px;font:inherit;background:var(--surface);color:var(--text-primary);min-height:44px}
.assess-nav{display:flex;gap:12px;margin-top:6px}
.assess-results{display:grid;gap:16px;margin:6px 0 20px}
.meter{display:grid;gap:8px}
.meter-track{height:12px;border-radius:999px;background:var(--surface-sunken);border:1px solid var(--border);overflow:hidden}
.meter-fill{display:block;height:100%;background:linear-gradient(90deg,var(--brand-primary-600),var(--brand-primary));border-radius:999px;transition:width .6s var(--ease)}
.assess-start{border-left:4px solid var(--brand-primary);background:var(--brand-primary-soft);border-radius:0 12px 12px 0;padding:16px 20px;margin:0 0 16px}
.assess-start p{margin:6px 0 0;color:var(--text-secondary)}
.assess-note{font-size:var(--text-small);color:var(--text-muted);border-top:1px dashed var(--border-strong);padding-top:14px}

/* ============ WORK SYSTEM ============ */
.filters{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:clamp(18px,2.5vw,28px);display:grid;gap:16px}
.fgroup{display:grid;gap:8px}
.fcount{display:flex;align-items:center;justify-content:space-between;gap:12px}
.study{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:clamp(22px,3vw,40px);margin:0 auto 28px;max-width:1020px;scroll-margin-top:90px;box-shadow:var(--shadow)}
.study:target{border-color:var(--brand-primary)}
.shot{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:0 0 20px;background:var(--surface-muted)}
.shot-head{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface)}
.shot-body{display:grid;gap:10px;padding:18px}
.shot-body span{display:block;height:12px;border-radius:6px;background:linear-gradient(90deg,var(--border-strong),var(--border))}
.shot-body span:nth-child(1){width:42%}.shot-body span:nth-child(2){width:88%}.shot-body span:nth-child(3){width:67%}.shot-body span:nth-child(4){width:30%;background:var(--brand-primary-border)}
.kv{margin:0;display:grid;gap:0}
.kv-row{display:grid;grid-template-columns:220px 1fr;gap:18px;padding:14px 0;border-top:1px solid var(--border)}
.kv-row dt{font-size:var(--text-caption);font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-primary-600);margin:0}
.kv-row dd{margin:0;color:var(--text-secondary)}
@media (max-width:720px){.kv-row{grid-template-columns:1fr;gap:6px}}
/* Cards inside dark sections: distinct from the parent, never pure white. */
.on-dark .card{background:#101915;border-color:var(--dark-line)}
.on-dark .card h3{color:#fff}
.on-dark .card p{color:var(--dark-muted)}
.on-dark .card .go{color:#8fd496}
/* Diagram layers built from core blocks. */
.dlayer p{margin:0;color:var(--dark-text);font-weight:700}
.dlayer p+p{font-weight:400;font-size:.85rem;color:var(--dark-muted);margin-top:4px}