/*
Theme Name: DartForge Autonomous Systems
Theme URI: https://dartforge.systems
Author: DartForge
Author URI: https://dartforge.systems
Description: One-page brochure theme for DartForge Autonomous Systems — hero, tabbed sections (Research Areas, Technology Stack, Collaborations, Careers, Contact), themed in the brand black/red identity.
Version: 1.1.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: dartforge
*/

@import url('https://fonts.googleapis.com/css2?family=Saira+Condensed:wght@400;500;600;700;800&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;600&display=swap');

:root{
  --ink:#0B0C0E; --forge:#D81E2C; --forge-deep:#A3121C;
  --steel:#6A7078; --paper:#FFFFFF; --surface:#F4F5F6; --line:#E4E6E9;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:'Inter',system-ui,sans-serif; -webkit-font-smoothing:antialiased;
}
.wrap{ max-width:1180px; margin:0 auto; padding:1.4rem 1.1rem 4rem; }
h1,h2,h3,h4{ font-family:'Saira Condensed',sans-serif; letter-spacing:.02em; margin:0; }
a{ color:inherit; }

/* ---- eyebrow + section title ---- */
.eyebrow{
  font-family:'JetBrains Mono',monospace; font-size:.74rem; font-weight:600;
  letter-spacing:.34em; text-transform:uppercase; color:var(--forge);
  display:flex; align-items:center; gap:.7rem; margin:0 0 .35rem;
}
.eyebrow::before{ content:""; width:26px; height:2px; background:var(--forge); }
.section-title{
  font-family:'Saira Condensed',sans-serif; font-weight:800; text-transform:uppercase;
  font-size:2.05rem; line-height:1; letter-spacing:.04em; margin:0 0 1.4rem;
}
.lead{ color:var(--steel); font-size:1.02rem; line-height:1.6; max-width:760px; margin:0 0 1.6rem; }

/* ---- HERO ---- */
.hero{
  position:relative; text-align:center; padding:2.6rem 1rem 2.4rem; margin-bottom:1.6rem;
  border:1px solid var(--line); background:linear-gradient(180deg,#fff 0%,#fafbfb 100%);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.hero::after{ content:""; position:absolute; left:0; right:0; bottom:0; height:3px; background:var(--forge); }
.hero img{ width:340px; max-width:78%; height:auto; }
.hero-tag{
  font-family:'Saira Condensed',sans-serif; text-transform:uppercase; font-weight:600;
  letter-spacing:.18em; font-size:1.18rem; color:var(--steel); margin-top:.2rem;
}
.hero-nav{ display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin-top:1.2rem; }
.hero-nav button{
  font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.2em; text-transform:uppercase;
  font-weight:600; color:var(--ink); background:#fff; border:1px solid var(--line);
  padding:.6rem 1.05rem; cursor:pointer; transition:.15s;
  clip-path:polygon(0 0,100% 0,100% 100%,8px 100%,0 calc(100% - 8px));
}
.hero-nav button:hover{ border-color:var(--forge); color:var(--forge); }

/* ---- tabs ---- */
.tabbar{ display:flex; gap:2px; border-bottom:2px solid var(--line); flex-wrap:wrap; margin-bottom:1.6rem; }
.tabbtn{
  background:transparent; border:0; border-bottom:3px solid transparent; cursor:pointer;
  padding:14px 22px; font-family:'Saira Condensed',sans-serif; font-weight:600;
  text-transform:uppercase; letter-spacing:.12em; font-size:1rem; color:var(--steel);
}
.tabbtn:hover{ color:var(--ink); }
.tabbtn.active{ color:var(--ink); border-bottom-color:var(--forge); }
.panel{ display:none; animation:fade .25s ease; }
.panel.active{ display:block; }
@keyframes fade{ from{ opacity:0; transform:translateY(4px);} to{ opacity:1; transform:none; } }

/* ---- cards ---- */
.grid{ display:grid; gap:14px; }
.g2{ grid-template-columns:repeat(2,1fr); }
.g3{ grid-template-columns:repeat(3,1fr); }
@media (max-width:780px){ .g2,.g3{ grid-template-columns:1fr; } }
.card{
  background:var(--surface); border:1px solid var(--line); padding:1.15rem 1.25rem;
  transition:transform .15s,border-color .15s;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
}
.card:hover{ transform:translateY(-3px); border-color:#cfd2d6; }
.card .idx{ font-family:'JetBrains Mono',monospace; font-size:.72rem; color:var(--forge); font-weight:600; letter-spacing:.1em; }
.card h4{ font-size:1.32rem; font-weight:700; text-transform:uppercase; margin:.2rem 0 .35rem; letter-spacing:.03em; }
.card p{ color:var(--steel); font-size:.92rem; line-height:1.5; margin:0; }

/* ---- tech chips ---- */
.stack-row{ margin-bottom:1.4rem; }
.stack-row .lbl{ font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.28em; text-transform:uppercase; color:var(--steel); margin-bottom:.55rem; }
.chips{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  font-family:'JetBrains Mono',monospace; font-size:.85rem; font-weight:600;
  padding:.55rem .95rem; background:var(--ink); color:#fff; letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% 100%,8px 100%,0 calc(100% - 8px));
}
.chip.red{ background:var(--forge); }
.chip.steel{ background:#21262b; }
.chip.ghost{ background:#fff; color:var(--ink); border:1px solid var(--line); }

/* ---- careers ---- */
.role{
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  background:var(--surface); border:1px solid var(--line); border-left:3px solid var(--forge);
  padding:1rem 1.2rem; margin-bottom:10px;
}
.role .t{ font-family:'Saira Condensed',sans-serif; font-weight:700; text-transform:uppercase; font-size:1.2rem; letter-spacing:.04em; }
.role .m{ color:var(--steel); font-size:.85rem; font-family:'JetBrains Mono',monospace; letter-spacing:.06em; }
.role .tag{ font-family:'JetBrains Mono',monospace; font-size:.66rem; letter-spacing:.18em; text-transform:uppercase; color:var(--forge); border:1px solid var(--forge); padding:.28rem .6rem; white-space:nowrap; }

/* ---- contact ---- */
.contact{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
@media (max-width:780px){ .contact{ grid-template-columns:1fr; } }
.contact a{ text-decoration:none; }
.cbox{ background:var(--ink); color:#fff; padding:1.3rem; height:100%; clip-path:polygon(0 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%); }
.cbox .k{ font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.26em; text-transform:uppercase; color:var(--forge); }
.cbox .v{ font-family:'Saira Condensed',sans-serif; font-size:1.35rem; font-weight:600; margin-top:.35rem; word-break:break-word; }
.cbox .s{ color:#9aa1a8; font-size:.85rem; margin-top:.2rem; }

/* ---- footer ---- */
.foot{
  margin-top:3rem; padding-top:1.3rem; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:.6rem;
  font-family:'JetBrains Mono',monospace; font-size:.7rem; letter-spacing:.18em; text-transform:uppercase; color:var(--steel);
}

/* ---- registrations / credentials ---- */
.creds{ margin-bottom:1.4rem; }
.cred{
  display:block; text-decoration:none; color:inherit;
  background:var(--surface); border:1px solid var(--line); border-top:3px solid var(--forge);
  padding:1.05rem 1.15rem 1.1rem; transition:transform .15s,border-color .15s;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.cred:hover{ transform:translateY(-3px); border-color:#cfd2d6; }
.cred-kind{ font-family:'JetBrains Mono',monospace; font-size:.66rem; letter-spacing:.16em;
  text-transform:uppercase; color:var(--steel); }
.cred-idlabel{ font-family:'Saira Condensed',sans-serif; font-weight:700; text-transform:uppercase;
  font-size:1.18rem; letter-spacing:.03em; color:var(--ink); margin-top:.35rem; }
.cred-id{ font-family:'JetBrains Mono',monospace; font-size:.82rem; color:var(--forge);
  margin-top:.35rem; word-break:break-all; }
.cred-verify{ font-family:'JetBrains Mono',monospace; font-size:.66rem; letter-spacing:.12em;
  text-transform:uppercase; color:var(--steel); margin-top:.6rem; opacity:0; transition:opacity .15s; }
.cred:hover .cred-verify{ opacity:1; color:var(--forge); }
.cred-note{
  display:flex; gap:.9rem; align-items:center; flex-wrap:wrap;
  background:var(--surface); border:1px solid var(--line); border-left:3px solid var(--forge);
  padding:.8rem 1.1rem;
}
.cred-note-v{ font-family:'Saira Condensed',sans-serif; font-weight:700; text-transform:uppercase;
  letter-spacing:.04em; font-size:1.1rem; color:var(--ink); }
.foot-legal{ flex-basis:100%; text-transform:none; font-family:'JetBrains Mono',monospace;
  font-size:.62rem; letter-spacing:.04em; color:var(--steel); line-height:1.7; }