/* ====== Design Tokens ====== */
:root{
  --bg: #0c0f14;
  --bg-elev: #11151b;
  --text: #eef1f6;
  --muted: #b7c1d6;

  /* Brand & accents (consistent across site) */
  --brand: #3ddc97;          /* CTA green */
  --brand-2: #2bb886;        /* CTA green (darker) */
  --accent: #78a1ff;         /* Link blue (default) */
  --accent-hover: #9ab7ff;   /* Link hover */
  --accent-visited: #bca8ff; /* Link visited */

  --focus: #f2c94c;          /* High-visibility focus ring */
  --card: #131822;
  --border: #1f2633;

  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --shadow-soft: 0 6px 18px rgba(0,0,0,.25);

  --container: 1100px;
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f7fafc;
    --bg-elev: #ffffff;
    --text: #0c1220;
    --muted: #4a5568;

    /* Keep brand consistent; adjust link tones for light bg */
    --accent: #2554ff;
    --accent-hover: #0e41ff;
    --accent-visited: #6236ff;

    --card: #ffffff;
    --border: #e6ecf2;
    --shadow: 0 10px 30px rgba(2,12,27,.08);
    --shadow-soft: 0 6px 18px rgba(2,12,27,.06);
    --focus: #b7791f;
  }
}

/* ====== Base ====== */
*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; height: auto; display: block; }

/* Global, accessible link styles */
a{
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: color-mix(in oklab, var(--accent), transparent 35%);
  text-underline-offset: 0.18em;
  transition: color .15s ease, text-decoration-color .15s ease, background-color .15s ease;
}
a:hover{
  color: var(--accent-hover);
  text-decoration-color: currentColor;
}
a:visited{ color: var(--accent-visited); }
a:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

p{ margin: 0 0 1rem; }
h1,h2,h3{ line-height: 1.2; margin: 0 0 .6rem; }
h1{ font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.02em; }
h2{ font-size: clamp(1.6rem, 2.5vw, 2.2rem); }
h3{ font-size: clamp(1.1rem, 2vw, 1.3rem); }

/* Utilities */
.container{
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}
.section{ padding: 4rem 0; }
.section-title{
  text-align: center;
  margin-bottom: 2rem;
}
.lead{
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  color: var(--muted);
}

/* Text selection */
::selection{
  background: color-mix(in oklab, var(--brand), #ffffff 10%);
  color: #031a13;
}

/* ====== Accessibility helpers ====== */
.sr-only{
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link{
  position: absolute; left: 0; top: 0; transform: translateY(-100%); background: var(--brand);
  color: #05110e; padding: .5rem .75rem; border-radius: 0 0 var(--radius) var(--radius); transition: transform .2s ease;
  z-index: 999;
}
.skip-link:focus{ transform: translateY(0); }

/* ====== Header & Nav ====== */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg), #000 6%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 0;
}
.brand{
  display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; letter-spacing: .2px;
  text-decoration: none; /* override global underline for brand */
}
.logo{
  inline-size: 44px; block-size: 44px; object-fit: cover; border-radius: 50%;
  box-shadow: var(--shadow-soft);
}
.brand-text{ font-size: 1.1rem; }

.site-nav{ position: relative; }
.site-nav ul{
  display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0;
}
/* Nav links are “pills” with no underline but clear hover/active states */
.site-nav a{
  display: inline-block; padding: .55rem .85rem; border-radius: 999px;
  color: var(--muted); text-decoration: none;
  border: 1px solid transparent;
}
.site-nav a:hover{
  color: var(--text);
  background: var(--border);
}
.site-nav a.active{
  color: var(--text);
  background: color-mix(in oklab, var(--brand), transparent 85%);
  border-color: color-mix(in oklab, var(--brand), transparent 70%);
}
.site-nav a:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.nav-toggle{
  display: none;
  background: transparent; border: 1px solid var(--border); color: var(--text);
  padding: .5rem .7rem; border-radius: 10px; font-size: 1.1rem; cursor: pointer;
}
.nav-toggle:focus-visible{ outline: 3px solid var(--focus); outline-offset: 2px; }

@media (max-width: 860px){
  .nav-toggle{ display: inline-block; }
  .site-nav ul{
    position: absolute; right: 0; top: calc(100% + .5rem);
    flex-direction: column; min-width: 200px; gap: 0;
    padding: .5rem; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-6px); transition: .2s ease;
  }
  .site-nav ul.open{ opacity: 1; visibility: visible; transform: translateY(0); }
  .site-nav li a{ width: 100%; }
}

/* ====== Hero ====== */
.hero{
  position: relative;
  padding: 6rem 0 5rem;
  background:
    linear-gradient(180deg, color-mix(in oklab, var(--brand), transparent 92%) 0%, transparent 60%),
    radial-gradient(1200px 600px at 120% -10%, color-mix(in oklab, var(--accent), transparent 85%), transparent 40%),
    radial-gradient(1000px 500px at -20% -20%, color-mix(in oklab, var(--brand-2), transparent 85%), transparent 40%);
  overflow: clip;
}
.hero-inner{
  display: grid; align-items: center; grid-template-columns: 1fr; min-height: 280px;
}
.hero-copy{
  text-align: center; max-width: 760px; margin-inline: auto;
}

/* Buttons (blue CTAs) */
.btn{
  display: inline-block;
  font-weight: 700; /* bolder */
  border-radius: 12px;
  padding: .8rem 1.1rem;
  border: 1px solid transparent;
  transition: transform .12s ease, background-color .2s ease, border-color .2s ease, color .2s ease;
  text-decoration: none; /* remove underline on buttons */
}
.btn:active{ transform: translateY(1px); }
.btn:focus-visible{ outline: 3px solid var(--focus); outline-offset: 2px; }

/* Primary button = blue */
.btn-primary{
  background: linear-gradient(180deg, var(--accent), color-mix(in oklab, var(--accent), #000 22%));
  color: #fff;
  border-color: color-mix(in oklab, var(--accent), #000 35%);
  box-shadow: 0 10px 24px color-mix(in oklab, var(--accent), #000 70%);
}
.btn-primary:hover{ filter: brightness(1.06); }
a.btn-primary, a.btn-primary:visited{ color:#fff; } /* prevent visited color overriding */

 /* Ghost button = blue outline/text */
.btn-ghost{
  background: transparent;
  color: var(--accent);
  border-color: color-mix(in oklab, var(--accent), transparent 20%);
}
.btn-ghost:hover{
  background: color-mix(in oklab, var(--accent), transparent 85%);
  border-color: var(--accent);
}
a.btn-ghost:visited{ color: var(--accent); } /* keep ghost buttons blue when visited */


/* ====== Features / Cards ====== */
.grid-3{
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(3, minmax(0,1fr));
}
@media (max-width: 900px){
  .grid-3{ grid-template-columns: 1fr; }
}
.feature-card{
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem 1.25rem; box-shadow: var(--shadow-soft);
}
.feature-card h3{ margin-bottom: .25rem; }
.feature-card p{ color: var(--muted); }
.feature-card a{ font-weight: 600; } /* reinforce link visibility in cards */

/* ====== Sections with BG ====== */
.section-bg{
  position: relative;
  padding: 4rem 0;
  background: linear-gradient(180deg, transparent, color-mix(in oklab, var(--bg-elev), transparent 0%) 100%);
}
.section-bg::before{
  content: ""; position: absolute; inset: 0;
  background-image: url('cleaning-bg.jpg'); /* optional decorative bg */
  background-size: cover; background-position: center;
  opacity: .08; pointer-events: none;
}

/* ====== Flip Cards ====== */
.cards-container{
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(3, minmax(0,1fr));
}
@media (max-width: 900px){
  .cards-container{ grid-template-columns: 1fr; }
}
.card{ perspective: 1000px; }
.card-inner{
  position: relative; transform-style: preserve-3d; transition: transform .6s cubic-bezier(.2,.7,.2,1);
  border-radius: var(--radius);
}
.card:focus-within .card-inner,
.card:hover .card-inner{ transform: rotateY(180deg); }

.card-face{
  min-height: 180px; padding: 1.2rem 1.25rem;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  display: grid; place-items: center; text-align: center;
  backface-visibility: hidden;
}
.card-front h3{ margin: 0; }
.card-back{
  position: absolute; inset: 0; transform: rotateY(180deg);
  display: grid; place-items: center;
  color: var(--muted);
}

.hint{
  text-align: center; color: var(--muted); margin-top: .75rem; font-size: .95rem;
}

/* ====== Footer ====== */
.site-footer{
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
}
.footer-inner{
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 1.1rem 0;
}
.social-media{ display:flex; gap:.6rem; align-items:center; }
.social-icon{
  width: 28px; height: 28px; filter: saturate(.1) contrast(1.1);
  transition: filter .2s ease, transform .12s ease;
}
.social-media a:hover .social-icon{
  filter: none; transform: translateY(-1px);
}

/* ====== Back to top ====== */
.back-to-top{ text-align: center; margin-top: 2rem; }

/* ====== Responsive Map (for contact page) ====== */
.map-card{ padding: 0; }
.map-wrap{
  position: relative; width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.map-wrap iframe{
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
}
@media (max-width: 720px){
  .map-wrap{ aspect-ratio: 4 / 5; }
}

/* ====== Reduced motion ====== */
@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}