/* HYDRA Tools — Base Stylesheet | Mobile-First */
:root {
  --color-bg:      #0f1117;
  --color-surface: #1a1d2e;
  --color-border:  #2d3154;
  --color-primary: #6366f1;
  --color-primary-h:#4f52d0;
  --color-accent:  #22d3ee;
  --color-text:    #e2e8f0;
  --color-muted:   #94a3b8;
  --color-success: #10b981;
  --color-warn:    #f59e0b;
  --radius:        0.5rem;
  --shadow:        0 4px 24px rgba(0,0,0,.4);
  --font:          -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body.hydra-body { background: var(--color-bg); color: var(--color-text);
  font-family: var(--font); line-height: 1.6; min-height: 100vh; }

/* Layout */
.hydra-header { display:flex; align-items:center; justify-content:space-between;
  padding: .75rem 1.25rem; background: var(--color-surface);
  border-bottom: 1px solid var(--color-border); position:sticky; top:0; z-index:50; }
.hydra-logo { font-weight:700; color:var(--color-primary); text-decoration:none; font-size:1.1rem; }
.hydra-nav a { color:var(--color-muted); text-decoration:none; margin-left:1.25rem; font-size:.9rem; }
.hydra-nav a:hover { color:var(--color-text); }
.hydra-main { max-width:860px; margin:0 auto; padding:1.5rem 1rem 3rem; }
.hydra-footer { text-align:center; padding:1.5rem; color:var(--color-muted); font-size:.8rem;
  border-top: 1px solid var(--color-border); }
.hydra-footer a { color:var(--color-muted); }

/* Hero */
.hydra-hero { margin-bottom:1.75rem; }
.hydra-hero h1 { font-size:clamp(1.4rem,4vw,2rem); font-weight:800; line-height:1.2;
  color:var(--color-text); margin-bottom:.75rem; }
.hydra-hero__editorial { color:var(--color-muted); font-size:.95rem; margin-bottom:.75rem; }
.hydra-hero__tldr { background:var(--color-surface); border-left:3px solid var(--color-accent);
  padding:.6rem .9rem; border-radius:0 var(--radius) var(--radius) 0; font-size:.88rem; }

/* Widget */
.hydra-widget-container { background:var(--color-surface); border:1px solid var(--color-border);
  border-radius:var(--radius); padding:1.25rem; margin-bottom:1.5rem; box-shadow:var(--shadow); }
.hw-form { display:flex; flex-direction:column; gap:1rem; }
.hw-inputs { display:grid; gap:.85rem; }
@media(min-width:600px){ .hw-inputs { grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); } }
.hw-label { display:flex; flex-direction:column; gap:.3rem; font-size:.88rem; color:var(--color-muted); }
.hw-input, .hw-select, .hw-textarea {
  background:var(--color-bg); border:1px solid var(--color-border); color:var(--color-text);
  border-radius:calc(var(--radius)*.6); padding:.55rem .75rem; font-size:.95rem; width:100%;
  transition:border-color .15s; }
.hw-input:focus, .hw-select:focus, .hw-textarea:focus {
  outline:none; border-color:var(--color-primary); }
.hw-unit { color:var(--color-accent); font-size:.8rem; }
.hw-range { width:100%; accent-color:var(--color-primary); }
.hw-range-val { color:var(--color-accent); font-weight:700; }
.hw-actions { display:flex; gap:.75rem; flex-wrap:wrap; }
.hw-btn { padding:.6rem 1.4rem; border-radius:var(--radius); border:none; cursor:pointer;
  font-weight:600; font-size:.9rem; transition:all .15s; }
.hw-btn--primary { background:var(--color-primary); color:#fff; }
.hw-btn--primary:hover { background:var(--color-primary-h); }
.hw-btn--ghost { background:transparent; color:var(--color-muted);
  border:1px solid var(--color-border); }
.hw-btn--ghost:hover { border-color:var(--color-primary); color:var(--color-text); }
.hw-error { color:var(--color-warn); font-size:.85rem; padding:.5rem; }
.hw-results-panel { margin-top:1rem; border-top:1px solid var(--color-border); padding-top:1rem; }
.hw-results-heading { font-size:1rem; font-weight:700; margin-bottom:.75rem; color:var(--color-accent); }
.hw-results-grid { display:grid; gap:.6rem; }
.hw-result-row { display:flex; justify-content:space-between; align-items:center;
  padding:.5rem .75rem; background:var(--color-bg); border-radius:calc(var(--radius)*.6); }
.hw-result-label { color:var(--color-muted); font-size:.85rem; }
.hw-result-value { font-weight:700; color:var(--color-accent); }
.hw-loading { color:var(--color-muted); font-size:.9rem; padding:1rem; text-align:center; }

/* CTAs */
.hydra-cta { margin:1.25rem 0; }
.hydra-cta__btn { display:inline-flex; align-items:center; gap:.4rem; padding:.7rem 1.5rem;
  border-radius:var(--radius); font-weight:700; font-size:.95rem; text-decoration:none;
  transition:all .15s; }
.hydra-cta__btn--primary { background:var(--color-success); color:#fff; width:100%;
  justify-content:center; font-size:1rem; padding:.85rem; }
.hydra-cta__btn--primary:hover { filter:brightness(1.1); }
.hydra-cta__btn--secondary { background:var(--color-primary); color:#fff; }
.hydra-cta__btn--secondary:hover { background:var(--color-primary-h); }
.hydra-cta__btn--outline { border:1px solid var(--color-primary); color:var(--color-primary);
  background:transparent; }
.hydra-cta__btn--outline:hover { background:var(--color-primary); color:#fff; }
.hydra-cta__badge { display:block; text-align:center; font-size:.75rem;
  color:var(--color-muted); margin-top:.35rem; }

/* Upsell */
.hydra-upsell { background:linear-gradient(135deg,#1e1b4b,#1a1d2e);
  border:1px solid var(--color-primary); border-radius:var(--radius);
  padding:1.1rem 1.25rem; margin:1.25rem 0; }
.hydra-upsell__tag { font-size:.72rem; font-weight:700; text-transform:uppercase;
  color:var(--color-accent); letter-spacing:.06em; }
.hydra-upsell__title { font-size:.95rem; font-weight:600; margin:.35rem 0 .75rem; }

/* Sidebar CTA */
.hydra-sidebar-cta { margin:1rem 0; text-align:center; }

/* Ads */
.hydra-ad { background:var(--color-surface); border:1px dashed var(--color-border);
  border-radius:var(--radius); min-height:90px; display:flex; align-items:center;
  justify-content:center; color:var(--color-muted); font-size:.75rem; margin:1rem 0;
  text-align:center; }

/* Content */
.hydra-content { margin-top:1.75rem; }
.hydra-content h2 { font-size:1.15rem; font-weight:700; margin:1.5rem 0 .6rem;
  color:var(--color-text); }
.hydra-content p { color:var(--color-muted); font-size:.9rem; line-height:1.7; }

/* FAQ */
.hydra-faq { margin-top:1.5rem; }
.hydra-faq h2 { font-size:1.15rem; font-weight:700; margin-bottom:1rem; }
.hydra-faq__item { border:1px solid var(--color-border); border-radius:var(--radius);
  margin-bottom:.5rem; overflow:hidden; }
.hydra-faq__q { padding:.75rem 1rem; cursor:pointer; font-size:.9rem; font-weight:600;
  list-style:none; display:flex; justify-content:space-between; align-items:center; }
.hydra-faq__q::-webkit-details-marker { display:none; }
.hydra-faq__q::after { content:"＋"; color:var(--color-primary); }
details[open] .hydra-faq__q::after { content:"－"; }
.hydra-faq__a { padding:.75rem 1rem; color:var(--color-muted); font-size:.875rem;
  border-top:1px solid var(--color-border); }

/* Disclaimer */
.hydra-disclaimer { margin-top:2rem; padding:.75rem; border-top:1px solid var(--color-border);
  color:var(--color-muted); font-size:.75rem; }