/* ============ Nexura Systems — Design System ============ */
:root{
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --container: 1180px;
  --transition: 0.5s cubic-bezier(.4,0,.2,1);
}

/* ---- Morning: warm, fresh, amber/peach on light base ---- */
[data-theme="morning"]{
  --bg: #fff8f2;
  --bg-alt: #fff1e6;
  --surface: #ffffff;
  --text: #2b1e14;
  --text-muted: #7a6a5c;
  --accent: #ff7a45;
  --accent-2: #ffb648;
  --accent-grad: linear-gradient(135deg, #ff7a45 0%, #ffb648 100%);
  --border: rgba(43,30,20,0.08);
  --card-shadow: 0 10px 40px rgba(255,122,69,0.12);
}

/* ---- Day: crisp, cool, business blue/violet on light base ---- */
[data-theme="day"]{
  --bg: #f7f8fc;
  --bg-alt: #eef0fb;
  --surface: #ffffff;
  --text: #14161f;
  --text-muted: #5b5f73;
  --accent: #4b5cf0;
  --accent-2: #8b5cf6;
  --accent-grad: linear-gradient(135deg, #4b5cf0 0%, #8b5cf6 100%);
  --border: rgba(20,22,31,0.08);
  --card-shadow: 0 10px 40px rgba(75,92,240,0.12);
}

/* ---- Evening: sunset, coral/pink on deep dusk base ---- */
[data-theme="evening"]{
  --bg: #1c1420;
  --bg-alt: #241a29;
  --surface: #2a1f30;
  --text: #fbeee6;
  --text-muted: #c8a9b2;
  --accent: #ff5e7e;
  --accent-2: #ff9b57;
  --accent-grad: linear-gradient(135deg, #ff5e7e 0%, #ff9b57 100%);
  --border: rgba(255,255,255,0.08);
  --card-shadow: 0 10px 40px rgba(255,94,126,0.18);
}

/* ---- Night: deep space, electric blue/violet on dark base ---- */
[data-theme="night"]{
  --bg: #0a0b12;
  --bg-alt: #10121c;
  --surface: #141726;
  --text: #eef0fb;
  --text-muted: #8b8fa8;
  --accent: #6d7bff;
  --accent-2: #c084fc;
  --accent-grad: linear-gradient(135deg, #6d7bff 0%, #c084fc 100%);
  --border: rgba(255,255,255,0.08);
  --card-shadow: 0 10px 50px rgba(109,123,255,0.25);
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  transition: background var(--transition), color var(--transition);
  overflow-x:hidden;
}
h1,h2,h3{ font-family: var(--font-display); line-height:1.15; letter-spacing:-0.02em;}
a{ color:inherit; text-decoration:none; }
.container{ max-width: var(--container); margin:0 auto; padding:0 24px; }
img{max-width:100%; display:block;}

.noise-overlay{
  position:fixed; inset:0; pointer-events:none; z-index:1;
  opacity:0.03; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- Header ---- */
.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(14px) saturate(160%);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.logo{ font-family:var(--font-display); font-weight:700; font-size:1.15rem; }
.logo span{ color:var(--accent); }
.main-nav{ display:flex; gap:32px; }
.main-nav a{ font-size:0.92rem; font-weight:500; color:var(--text-muted); transition:color .3s; }
.main-nav a:hover{ color:var(--text); }
.header-actions{ display:flex; align-items:center; gap:14px; }

.theme-toggle{
  width:38px; height:38px; border-radius:50%;
  border:1px solid var(--border); background:var(--surface);
  display:flex; align-items:center; justify-content:center; cursor:pointer;
}
.theme-dot{ width:14px; height:14px; border-radius:50%; background:var(--accent-grad); }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:14px 28px; border-radius:999px; font-weight:600; font-size:0.95rem;
  transition: transform .25s, box-shadow .25s, opacity .25s; cursor:pointer; border:none;
}
.btn-sm{ padding:10px 20px; font-size:0.85rem; }
.btn-primary{ background: var(--accent-grad); color:#fff; box-shadow: var(--card-shadow); }
.btn-primary:hover{ transform: translateY(-2px); }
.btn-ghost{ background:transparent; border:1px solid var(--border); color:var(--text); }
.btn-ghost:hover{ background:var(--bg-alt); }

/* ---- Hero ---- */
.hero{ position:relative; padding:120px 0 90px; overflow:hidden; }
.hero-bg{ position:absolute; inset:0; z-index:0; }
.blob{ position:absolute; border-radius:50%; filter:blur(90px); opacity:0.35; }
.blob-1{ width:480px; height:480px; background:var(--accent); top:-150px; left:-100px; animation: float1 14s ease-in-out infinite; }
.blob-2{ width:420px; height:420px; background:var(--accent-2); bottom:-160px; right:-80px; animation: float2 16s ease-in-out infinite; }
.grid-overlay{
  position:absolute; inset:0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:48px 48px; opacity:0.4; mask-image: radial-gradient(ellipse at top, black, transparent 70%);
}
@keyframes float1{ 0%,100%{transform:translate(0,0);} 50%{transform:translate(30px,40px);} }
@keyframes float2{ 0%,100%{transform:translate(0,0);} 50%{transform:translate(-30px,-30px);} }

.hero-inner{ position:relative; z-index:2; max-width:820px; }
.eyebrow{
  display:inline-block; font-size:0.8rem; font-weight:600; letter-spacing:0.08em;
  text-transform:uppercase; color:var(--accent); margin-bottom:18px;
}
.hero h1{ font-size:clamp(2.2rem, 5vw, 3.6rem); margin-bottom:22px; }
.hero-sub{ font-size:1.15rem; color:var(--text-muted); max-width:620px; margin-bottom:36px; }
.hero-cta{ display:flex; gap:16px; margin-bottom:60px; flex-wrap:wrap; }

.hero-stats{ display:flex; gap:48px; flex-wrap:wrap; }
.stat strong{ display:block; font-family:var(--font-display); font-size:1.8rem; color:var(--text); }
.stat span{ font-size:0.85rem; color:var(--text-muted); }

/* ---- Intro ---- */
.intro{ padding:40px 0 100px; }
.intro-inner p{ font-size:1.25rem; line-height:1.7; color:var(--text-muted); max-width:900px; }

/* ---- Section head ---- */
.section-head{ max-width:640px; margin-bottom:48px; }
.section-head h2{ font-size:clamp(1.8rem, 3.5vw, 2.6rem); margin-top:10px; }

/* ---- Services Bento ---- */
.services{ padding:80px 0; }
.bento-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap:24px;
}
.bento-card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg);
  padding:36px; transition: transform .35s, box-shadow .35s;
  position:relative; overflow:hidden;
}
.bento-card:hover{ transform: translateY(-6px); box-shadow: var(--card-shadow); }
.bento-lg{ grid-column: span 2; }
.card-icon{ font-size:2rem; margin-bottom:18px; }
.bento-card h3{ font-size:1.25rem; margin-bottom:12px; }
.bento-card p{ color:var(--text-muted); line-height:1.6; }

/* ---- Work ---- */
.work{ padding:80px 0; background:var(--bg-alt); }
.work-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.work-card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:32px; transition: transform .3s;
}
.work-card:hover{ transform: translateY(-4px); }
.work-tag{
  display:inline-block; font-size:0.72rem; font-weight:700; text-transform:uppercase;
  letter-spacing:0.06em; color:var(--accent); background:var(--bg); padding:6px 12px;
  border-radius:999px; margin-bottom:16px;
}
.work-card h3{ font-size:1.15rem; margin-bottom:10px; }
.work-card p{ color:var(--text-muted); line-height:1.6; font-size:0.95rem; }

/* ---- Process ---- */
.process{ padding:90px 0; }
.process-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.process-step{ position:relative; padding-top:20px; border-top:2px solid var(--border); }
.step-num{
  font-family:var(--font-display); font-size:0.85rem; font-weight:700; color:var(--accent);
}
.process-step h3{ font-size:1.1rem; margin:12px 0 8px; }
.process-step p{ color:var(--text-muted); font-size:0.9rem; line-height:1.6; }

/* ---- Stack ---- */
.stack{ padding:60px 0 100px; }
.stack-tags{ display:flex; flex-wrap:wrap; gap:12px; }
.stack-tags span{
  padding:10px 18px; border-radius:999px; border:1px solid var(--border);
  background:var(--surface); font-size:0.88rem; font-weight:500; color:var(--text-muted);
}

/* ---- Why ---- */
.why{ padding:80px 0; background:var(--bg-alt); }
.why-inner{ max-width:760px; }
.why-text h2{ font-size:clamp(1.7rem,3vw,2.3rem); margin:12px 0 18px; }
.why-text p{ color:var(--text-muted); line-height:1.7; font-size:1.05rem; }

/* ---- Contact ---- */
.contact{ padding:110px 0; }
.contact-inner{ max-width:640px; }
.contact h2{ font-size:clamp(1.9rem,3.5vw,2.6rem); margin:12px 0 16px; }
.contact p{ color:var(--text-muted); margin-bottom:36px; line-height:1.6; }
.contact-form{ display:flex; flex-direction:column; gap:16px; }
.form-row{ display:flex; gap:16px; }
.contact-form input, .contact-form textarea{
  width:100%; padding:16px 18px; border-radius:var(--radius-sm); border:1px solid var(--border);
  background:var(--surface); color:var(--text); font-family:var(--font-body); font-size:0.95rem;
  resize:vertical;
}
.contact-form input:focus, .contact-form textarea:focus{ outline:2px solid var(--accent); }
.contact-note{ font-size:0.85rem; margin-top:14px; }

/* ---- Footer ---- */
.site-footer{ padding:50px 0; border-top:1px solid var(--border); }
.footer-inner{ display:flex; flex-wrap:wrap; justify-content:space-between; gap:24px; align-items:center; }
.footer-brand p{ color:var(--text-muted); font-size:0.85rem; margin-top:6px; }
.footer-links{ display:flex; gap:24px; }
.footer-links a{ font-size:0.88rem; color:var(--text-muted); }
.footer-legal{ font-size:0.8rem; color:var(--text-muted); width:100%; text-align:center; margin-top:20px; }

/* ---- Responsive ---- */
@media (max-width: 900px){
  .main-nav{ display:none; }
  .bento-grid, .work-grid, .process-grid{ grid-template-columns:1fr; }
  .bento-lg{ grid-column:span 1; }
  .form-row{ flex-direction:column; }
  .hero-stats{ gap:28px; }
}