/* ========== Theme variables ========== */
/* Defaults to dark until JS applies user or system preference */
:root{
  --header-h: 56px;

  /* Dark theme */
  --bg-grad-1: #1a1f36;
  --bg-grad-2: #2a3a70;
  --header-bg: #1a1f36;
  --surface: rgba(255,255,255,0.05);
  --surface-border-1: rgba(255,255,255,0.1);
  --surface-border-2: rgba(255,255,255,0.2);

  --text: #ffffff;
  --text-soft: #cccccc;
  --text-muted: #aaaaaa;

  --link: #ffffff;
  --link-hover: #3dd5f3;

  --btn-primary: #3dd5f3;
  --btn-primary-hover: #2fc2e0;
  --btn-primary-text: #1a1f36;
  --btn-outline: #3dd5f3;

  --accent: #7b61ff;
}


/* ========== Reset ========== */
*{ box-sizing:border-box; margin:0; padding:0; }
html{ font-family: Arial, sans-serif; color: var(--text); }
a{ text-decoration:none; color: var(--link); }
a:hover{ color: var(--link-hover); }
a:focus-visible, button:focus-visible{ outline:2px solid var(--btn-outline); outline-offset:2px; }

/* ========== Base ========== */
body{
  min-height:100vh;
  background: linear-gradient(to bottom, var(--bg-grad-1), var(--bg-grad-2));
  color: var(--text);
}
.menu-open{ overflow:hidden; }

.container{ max-width:1200px; margin:0 auto; padding:100px 16px; }

/* ========== Header and Nav ========== */
.site-header{
  position:sticky; top:0; left:0; right:0; z-index:100;
  background: var(--header-bg);
  border-bottom: 1px solid var(--surface-border-1);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px;
}
.logo{ font-size:1.25rem; font-weight:bold; color: var(--text); }

.main-nav{ display:flex; align-items:center; gap:24px; position:relative; }
.nav-list{ list-style:none; display:flex; gap:24px; }
.nav-list a{ font-size:0.95rem; padding:8px; }

/* Theme toggle button */
.theme-toggle{
  margin-right: 8px;
  background: transparent;
  border: 1px solid var(--surface-border-2);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
}
.theme-toggle:hover{
  border-color: var(--btn-outline);
}

/* Mobile menu button */
.nav-toggle{
  display:none;
  background: transparent;
  border: 1px solid var(--surface-border-2);
  color: var(--text);
  padding:8px 10px;
  border-radius:4px;
}

/* ========== Buttons ========== */
.btn{ font-size:0.85rem; padding:8px 16px; border-radius:24px; cursor:pointer; transition:background 0.2s, color 0.2s, border-color 0.2s; }
.btn-outline{ border:1px solid var(--btn-outline); color:var(--btn-outline); background:transparent; }
.btn-outline:hover{ background: color-mix(in oklab, var(--btn-outline) 10%, transparent); }
.btn-solid{ background: var(--btn-primary); color: var(--btn-primary-text); border:none; }
.btn-solid:hover{ background: var(--btn-primary-hover); }

/* ========== Hero ========== */
.hero{ padding:60px 0 30px; text-align:center; }
.hero h1{ font-size:2.5rem; margin-bottom:8px; color: var(--text); }
.hero p{ color: var(--text-soft); margin-bottom:16px; }
.hero-ctas{ display:flex; gap:12px; justify-content:center; margin-top:8px; }

/* ========== Cards ========== */
.grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap:16px; }
.card{
  background: var(--surface);
  border:1px solid var(--surface-border-1);
  border-radius:6px;
  padding:20px;
  display:flex; flex-direction:column; gap:10px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.2s;
}
.card:hover{ transform: translateY(-4px); box-shadow: 0 6px 20px rgba(0,0,0,0.2); }
.card h3{ font-size:1.2rem; color: var(--text); }
.card p{ color: var(--text-soft); }
.bullets{ list-style:disc; padding-left:18px; color: var(--text-soft); }
.card .actions{ margin-top:8px; display:flex; gap:10px; flex-wrap:wrap; }
.pill{
  font-size:0.75rem;
  border:1px solid var(--accent);
  border-radius:999px; padding:2px 8px;
  color: var(--accent);
  display:inline-block;
}

/* ========== Table ========== */
.compare{ margin:30px 0; overflow-x:auto; }
table{ width:100%; border-collapse:collapse; }
th, td{ border:1px solid var(--surface-border-2); padding:10px; text-align:left; }
th{ background: color-mix(in oklab, var(--surface) 40%, var(--text) 0%); color: var(--text); }
tbody tr:nth-child(odd){ background: color-mix(in oklab, var(--surface) 85%, var(--text) 0%); }

/* ========== Footer ========== */
.site-footer{
  border-top:1px solid var(--surface-border-1);
  background: var(--header-bg);
}
.footer-inner{
  display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center;
  padding:24px 16px;
}
.footer-nav .nav-list{ display:flex; gap:16px; list-style:none; }
.site-footer p{ font-size:0.9rem; color: var(--text-muted); }

/* ========== Mobile menu ========== */
@media (max-width: 768px){
  .nav-list{ display:none; }
  .nav-toggle{ display:block; }

  .main-nav.active::before{
    content:"";
    position:fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(0,0,0,0.6);
    z-index:998;
  }

  .main-nav.active .nav-list{
    display:flex; flex-direction:column; gap:12px;

    position:fixed;
    top: var(--header-h);
    left:0; right:0;
    z-index:999;

    background: var(--header-bg);
    padding:16px;
    border-bottom:1px solid var(--surface-border-1);
    box-shadow:0 8px 24px rgba(0,0,0,0.2);
  }

  .nav-list a{ display:block; padding:12px 8px; font-size:1rem; }

  .hero h1{ font-size:2rem; }
}


/* ========== Sticky Footer ========== */
html, body {
  height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1; /* push footer down */
}

.site-footer {
  margin-top: auto; /* stick to bottom */
}