/* ============================================
   CollabLinq — Main Stylesheet
   ============================================ */

:root{
  --bg:#0B1020;
  --bg-alt:#0F1630;

  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.07);

  --border:rgba(255,255,255,.10);

  --text:#E8EEFF;
  --text-muted:#B8C3E6;
  --text-faint:#7E8AB3;

  --primary:#6D5EFC;
  --primary-hover:#5A46E0;
  --primary-2:#2B86FF;
  --success:#2EE59D;

  --primary-contrast:#FFFFFF;

  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;

  --font-display:"Space Grotesk","Inter",system-ui,sans-serif;
  --font-body:"Inter",system-ui,-apple-system,sans-serif;

  --container:1140px;

  --shadow-card:
    0 20px 40px -20px rgba(0,0,0,.45);
}


/* ============================================
   RESET
   ============================================ */

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;

  background:
    radial-gradient(
      900px 420px at 20% 10%,
      rgba(109,94,252,.20),
      transparent 55%
    ),
    radial-gradient(
      900px 420px at 85% 15%,
      rgba(43,134,255,.18),
      transparent 60%
    ),
    radial-gradient(
      700px 360px at 50% 95%,
      rgba(46,229,157,.10),
      transparent 60%
    ),
    linear-gradient(
      180deg,
      var(--bg),
      var(--bg-alt)
    );

  background-attachment:fixed;

  color:var(--text);

  font-family:var(--font-body);

  font-size:16px;

  line-height:1.6;

  -webkit-font-smoothing:antialiased;

  overflow-x:hidden;
}


/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3{
  font-family:var(--font-display);

  font-weight:600;

  line-height:1.15;

  margin:0 0 .5em;

  letter-spacing:-.01em;

  color:var(--text);
}

p{
  margin:0 0 1em;
}

a{
  color:inherit;
}

ul,
ol{
  margin:0;

  padding:0;

  list-style:none;
}


/* ============================================
   CONTAINERS
   ============================================ */

.container{
  width:min(var(--container),92%);

  margin:0 auto;
}

.container-narrow{
  width:min(820px,92%);
}


/* ============================================
   ACCESSIBILITY
   ============================================ */

.skip-link{
  position:absolute;

  left:-999px;

  top:auto;

  background:var(--primary);

  color:#fff;

  padding:10px 16px;

  border-radius:8px;

  z-index:200;
}

.skip-link:focus{
  left:16px;

  top:16px;
}

:focus-visible{
  outline:2px solid var(--primary);

  outline-offset:3px;
}


/* ============================================
   BUTTONS
   ============================================ */

.btn{
  display:inline-flex;

  align-items:center;

  justify-content:center;

  gap:.5em;

  font-family:var(--font-body);

  font-weight:600;

  text-decoration:none;

  border-radius:999px;

  border:1px solid transparent;

  cursor:pointer;

  transition:
    transform .15s ease,
    background .15s ease,
    border-color .15s ease,
    box-shadow .15s ease;

  white-space:nowrap;
}

.btn:hover{
  transform:translateY(-1px);
}

.btn-primary{
  background:
    linear-gradient(
      135deg,
      var(--primary),
      var(--primary-2)
    );

  color:var(--primary-contrast);

  box-shadow:
    0 12px 24px -10px rgba(109,94,252,.4);
}

.btn-primary:hover{
  filter:brightness(1.05);

  box-shadow:
    0 16px 30px -10px rgba(109,94,252,.5);
}

.btn-ghost{
  background:transparent;

  color:var(--text);

  border-color:var(--border);
}

.btn-ghost:hover{
  border-color:var(--primary);

  background:rgba(109,94,252,.06);
}

.btn-lg{
  padding:14px 26px;

  font-size:1rem;
}

.btn-sm{
  padding:9px 18px;

  font-size:.875rem;
}


/* ============================================
   HEADER
   ============================================ */

.site-header{
  position:sticky;

  top:0;

  z-index:100;

  background:rgba(9,13,28,.55);

  backdrop-filter:blur(12px);

  border-bottom:1px solid var(--border);
}

.header-inner{
  display:flex;

  align-items:center;

  justify-content:space-between;

  padding:16px 0;
}

.brand{
  display:flex;

  align-items:center;

  gap:10px;

  text-decoration:none;
}

.brand-mark{
  display:inline-flex;
}

.brand-name{
  font-family:var(--font-display);

  font-weight:700;

  font-size:1.15rem;

  letter-spacing:-.01em;

  color:var(--text);
}

.site-nav{
  display:flex;

  align-items:center;

  gap:28px;
}

.site-nav a:not(.btn){
  text-decoration:none;

  color:var(--text-muted);

  font-weight:500;

  font-size:.95rem;

  transition:color .15s ease;
}

.site-nav a:not(.btn):hover{
  color:var(--text);
}

.nav-toggle-btn{
  display:none;

  flex-direction:column;

  gap:5px;

  cursor:pointer;

  padding:6px;
}

.nav-toggle-btn span{
  width:22px;

  height:2px;

  background:var(--text);

  border-radius:2px;

  transition:
    transform .2s ease,
    opacity .2s ease;
}


/* ============================================
   HERO
   ============================================ */

.hero{
  position:relative;

  overflow:hidden;

  padding:70px 0 50px;
}

.hero::before{
  content:"";

  position:absolute;

  top:-180px;

  right:-160px;

  width:640px;

  height:640px;

  background:
    radial-gradient(
      closest-side,
      rgba(109,94,252,.14),
      rgba(109,94,252,0) 72%
    );

  pointer-events:none;
}

.hero::after{
  content:"";

  position:absolute;

  bottom:-220px;

  left:-140px;

  width:520px;

  height:520px;

  background:
    radial-gradient(
      closest-side,
      rgba(43,134,255,.12),
      rgba(43,134,255,0) 72%
    );

  pointer-events:none;
}

.hero-grid{
  position:relative;

  display:grid;

  grid-template-columns:1.05fr .95fr;

  gap:56px;

  align-items:center;
}

.hero-copy{
  display:flex;

  flex-direction:column;

  align-items:center;

  text-align:center;

  width:100%;
}


/* ============================================
   HERO EYEBROW
   ============================================ */

.eyebrow{
  display:inline-flex;

  align-items:center;

  justify-content:center;

  padding:9px 20px;

  border:1px solid rgba(255,255,255,.14);

  border-radius:999px;

  font-family:var(--font-display);

  font-size:.95rem;

  font-weight:600;

  color:var(--text-muted);

  background:rgba(255,255,255,.045);

  backdrop-filter:blur(10px);

  margin-bottom:24px;
}


/* ============================================
   HERO TITLE
   ============================================ */

.hero-copy h1{
  font-family:var(--font-display);

  font-weight:700;

  font-size:clamp(
    3rem,
    5vw,
    4.8rem
  );

  line-height:1.05;

  letter-spacing:-.04em;

  max-width:1000px;

  width:100%;

  margin:0 auto 22px;

  color:var(--text);

  text-align:center;
}

.hero-copy h1 span{
  display:inline;

  background:none;

  color:var(--text);
}


/* ============================================
   HERO SUBTITLE
   ============================================ */

.hero-sub{
  color:var(--text-muted);

  font-family:var(--font-body);

  font-size:clamp(
    1rem,
    1.5vw,
    1.2rem
  );

  font-weight:500;

  line-height:1.55;

  max-width:760px;

  margin:0 auto 26px;

  text-align:center;
}


/* ============================================
   HERO ACTIONS
   ============================================ */

.hero-actions{
  display:flex;

  flex-wrap:wrap;

  justify-content:center;

  align-items:center;

  gap:12px;

  margin-top:2px;

  margin-bottom:30px;
}

.hero-actions .btn{
  min-height:54px;

  padding:14px 26px;

  font-size:1rem;

  font-weight:700;

  border-radius:15px;
}


/* ============================================
   HERO STATS
   ============================================ */

.hero-stats{
  display:flex;

  justify-content:center;

  gap:38px;

  margin:0;

  padding-top:24px;

  border-top:1px solid var(--border);

  width:100%;
}

.hero-stats > div{
  display:flex;

  flex-direction:column;

  align-items:center;

  gap:2px;
}

.hero-stats dt{
  font-family:var(--font-display);

  font-size:1.45rem;

  font-weight:700;

  color:var(--text);
}

.hero-stats dd{
  margin:0;

  color:var(--text-faint);

  font-size:.85rem;
}


/* ============================================
   HERO VISUAL
   ============================================ */

.hero-visual{
  position:relative;

  display:flex;
}

.panel-mock{
  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,.06),
      rgba(255,255,255,.03)
    );

  border:1px solid var(--border);

  border-radius:var(--radius-lg);

  box-shadow:
    0 30px 60px -24px rgba(20,22,31,.2);

  overflow:hidden;

  transform:rotate(.3deg);

  width:100%;

  aspect-ratio:6/5;

  display:flex;

  flex-direction:column;
}

.panel-mock-bar{
  display:flex;

  align-items:center;

  gap:7px;

  padding:14px 18px;

  background:var(--surface-2);

  border-bottom:1px solid var(--border);

  flex-shrink:0;
}

.panel-dot{
  width:10px;

  height:10px;

  border-radius:50%;
}

.panel-dot-red{
  background:#FF5F57;
}

.panel-dot-yellow{
  background:#FEBC2E;
}

.panel-dot-green{
  background:#28C840;
}

.panel-mock-url{
  margin-left:14px;

  font-size:.74rem;

  font-weight:600;

  color:var(--text-faint);

  background:var(--bg);

  border:1px solid var(--border);

  padding:4px 14px;

  border-radius:999px;
}

.panel-mock-body{
  flex:1;

  display:flex;

  align-items:center;

  justify-content:center;

  background:#0B1220;

  padding:20px;
}

.panel-mock-img{
  display:block;

  width:100%;

  height:100%;

  object-fit:contain;

  border-radius:10px;
}


/* ============================================
   SECTIONS
   ============================================ */

.section{
  padding:55px 0 !important;
}

.section-alt{
  background:var(--bg-alt);

  border-top:1px solid var(--border);

  border-bottom:1px solid var(--border);
}

.section-head{
  max-width:700px;

  margin:0 auto 36px !important;

  text-align:center;
}

.section-head h2{
  font-size:clamp(
    1.7rem,
    3vw,
    2.3rem
  );

  margin-bottom:8px;
}

.section-head p{
  color:var(--text-muted);

  font-size:1.05rem;

  margin:0;
}


/* ============================================
   FEATURE GRID
   ============================================ */

.feature-grid{
  display:grid;

  grid-template-columns:repeat(3,1fr);

  gap:24px;
}

.feature-card{
  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,.06),
      rgba(255,255,255,.03)
    );

  border:1px solid var(--border);

  border-radius:var(--radius-md);

  padding:0;

  overflow:hidden;

  display:flex;

  flex-direction:column;

  box-shadow:var(--shadow-card);

  transition:
    border-color .2s ease,
    transform .2s ease,
    box-shadow .2s ease;
}

.feature-card:hover{
  border-color:rgba(109,94,252,.35);

  transform:translateY(-3px);

  box-shadow:
    0 24px 40px -20px rgba(20,22,31,.22);
}

.feature-thumb{
  width:100%;

  aspect-ratio:16/10;

  overflow:hidden;

  margin:0;

  border-bottom:1px solid var(--border);
}

.feature-thumb img{
  width:100%;

  height:100%;

  object-fit:cover;

  object-position:top;

  display:block;
}

.feature-body{
  padding:20px 26px 26px;
}

.feature-card h3{
  font-size:1.2rem;

  margin-bottom:8px;
}

.feature-card p{
  color:var(--text-muted);

  font-size:.95rem;

  margin-bottom:16px;
}

.tag-list{
  display:flex;

  flex-wrap:wrap;

  gap:8px;
}

.tag-list li{
  font-size:.78rem;

  font-weight:600;

  padding:6px 13px;

  border-radius:999px;

  border:1px solid var(--border);

  background:rgba(109,94,252,.12);

  color:#D7D2FF;
}


/* ============================================
   HOW IT WORKS
   Same design system as FAQ
   ============================================ */

#how-it-works .container-narrow{
  width:min(850px,92%);
}

#how-it-works .section-head{
  margin-bottom:34px !important;
}

#how-it-works .section-head h2{
  margin-bottom:8px;
}

#how-it-works .section-head p{
  max-width:650px;

  margin-left:auto;

  margin-right:auto;
}


/* ============================================
   HOW IT WORKS / ACCORDION
   ============================================ */

.faq-list{
  display:flex;

  flex-direction:column;

  gap:10px;
}

.faq-item{
  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,.06),
      rgba(255,255,255,.03)
    );

  border:1px solid var(--border);

  border-radius:var(--radius-md);

  padding:5px 22px;

  transition:
    border-color .2s ease,
    background .2s ease,
    box-shadow .2s ease;
}

.faq-item:hover{
  border-color:rgba(109,94,252,.28);
}

.faq-item[open]{
  border-color:rgba(109,94,252,.25);

  background:
    linear-gradient(
      180deg,
      rgba(109,94,252,.07),
      rgba(255,255,255,.035)
    );
}

.faq-item summary{
  cursor:pointer;

  list-style:none;

  padding:15px 0;

  font-weight:600;

  font-size:1rem;

  display:flex;

  align-items:center;

  justify-content:space-between;

  gap:20px;

  color:var(--text);
}

.faq-item summary::-webkit-details-marker{
  display:none;
}

.faq-item summary::after{
  content:"+";

  font-size:1.3rem;

  line-height:1;

  color:var(--primary);

  margin-left:16px;

  transition:transform .2s ease;

  flex-shrink:0;
}

.faq-item[open] summary::after{
  transform:rotate(45deg);
}

.faq-item p{
  color:var(--text-muted);

  font-size:.94rem;

  line-height:1.7;

  padding:0 0 18px;

  margin:0;
}


/* ============================================
   STEPS
   ============================================ */

.steps-grid{
  display:grid;

  grid-template-columns:repeat(4,1fr);

  gap:20px;

  counter-reset:step;
}

.step-card{
  background:
    linear-gradient(
      180deg,
      rgba(255,255,255,.06),
      rgba(255,255,255,.03)
    );

  border:1px solid var(--border);

  border-radius:var(--radius-md);

  padding:24px 22px;

  box-shadow:var(--shadow-card);

  transition:
    transform .2s ease,
    border-color .2s ease;
}

.step-card:hover{
  transform:translateY(-3px);

  border-color:rgba(109,94,252,.30);
}

.step-number{
  display:inline-flex;

  align-items:center;

  justify-content:center;

  width:34px;

  height:34px;

  border-radius:10px;

  background:var(--surface-2);

  border:1px solid var(--border);

  font-family:var(--font-display);

  font-weight:700;

  font-size:.9rem;

  color:var(--primary);

  margin-bottom:14px;
}

.step-card h3{
  font-size:1.05rem;

  margin-bottom:6px;
}

.step-card p{
  color:var(--text-muted);

  font-size:.9rem;

  margin:0;
}


/* ============================================
   CTA
   ============================================ */

.cta-bar{
  display:flex;

  align-items:center;

  justify-content:space-between;

  gap:28px;

  flex-wrap:wrap;

  background:
    linear-gradient(
      135deg,
      rgba(109,94,252,.08),
      rgba(43,134,255,.05)
    );

  border:1px solid var(--border);

  border-radius:var(--radius-lg);

  padding:36px 42px;
}

.cta-bar h2{
  font-size:1.7rem;

  margin-bottom:6px;
}

.cta-bar p{
  color:var(--text-muted);

  margin:0;
}

.cta-bar-actions{
  display:flex;

  gap:12px;

  flex-wrap:wrap;
}


/* ============================================
   FOOTER
   ============================================ */

.site-footer{
  border-top:1px solid var(--border);

  padding:32px 0;

  background:var(--bg-alt);
}

.footer-inner{
  display:flex;

  align-items:center;

  justify-content:space-between;

  flex-wrap:wrap;

  gap:16px;
}

.footer-brand{
  display:flex;

  align-items:center;

  gap:9px;

  font-weight:600;

  color:var(--text-muted);

  font-size:.9rem;
}

.footer-nav{
  display:flex;

  gap:22px;
}

.footer-nav a{
  text-decoration:none;

  color:var(--text-muted);

  font-size:.88rem;
}

.footer-nav a:hover{
  color:var(--text);
}

.footer-tag{
  margin:0;

  color:var(--text-faint);

  font-size:.85rem;
}


/* ============================================
   REVEAL ANIMATION
   ============================================ */

.reveal{
  opacity:0;

  transform:translateY(16px);

  transition:
    opacity .6s ease,
    transform .6s ease;
}

.reveal.is-visible{
  opacity:1;

  transform:none;
}


/* ============================================
   TABLET
   ============================================ */

@media (max-width:900px){

  .hero-grid{
    grid-template-columns:1fr;

    gap:42px;
  }

  .hero{
    padding:60px 0 45px !important;
  }

  .feature-grid{
    grid-template-columns:1fr;
  }

  .steps-grid{
    grid-template-columns:1fr 1fr;
  }

  .cta-bar{
    padding:32px;
  }

  .hero-copy h1{
    font-size:clamp(
      3rem,
      7vw,
      4.2rem
    );
  }

  #how-it-works .container-narrow{
    width:min(760px,92%);
  }
}


/* ============================================
   MOBILE NAVIGATION
   ============================================ */

@media (max-width:720px){

  .nav-toggle-btn{
    display:flex;
  }

  .site-nav{
    position:absolute;

    top:100%;

    left:0;

    right:0;

    flex-direction:column;

    align-items:stretch;

    gap:0;

    background:var(--bg);

    border-bottom:1px solid var(--border);

    max-height:0;

    overflow:hidden;

    transition:max-height .25s ease;
  }

  .site-nav a{
    padding:14px 24px;

    border-top:1px solid var(--border);
  }

  .site-nav .btn{
    margin:14px 24px;
  }

  .nav-toggle:checked ~ .site-nav{
    max-height:320px;
  }


  /* ==========================================
     MOBILE HERO
     ========================================== */

  .hero{
    padding:55px 0 40px !important;
  }

  .hero-copy h1{
    font-size:clamp(
      2.6rem,
      11vw,
      3.6rem
    );

    line-height:1.05;

    letter-spacing:-.04em;

    max-width:100%;

    margin-bottom:18px;
  }

  .hero-sub{
    font-size:1rem;

    line-height:1.5;

    max-width:95%;

    margin-bottom:24px;
  }

  .eyebrow{
    font-size:.82rem;

    padding:8px 15px;

    margin-bottom:20px;
  }


  /* ==========================================
     MOBILE BUTTONS
     ========================================== */

  .hero-actions{
    width:100%;

    flex-direction:column;

    gap:10px;

    margin-bottom:26px;
  }

  .hero-actions .btn{
    width:100%;

    min-height:54px;
  }


  /* ==========================================
     MOBILE STATS
     ========================================== */

  .hero-stats{
    gap:22px;

    flex-wrap:wrap;

    padding-top:20px;
  }


  /* ==========================================
     MOBILE SECTIONS
     ========================================== */

  .section{
    padding:45px 0 !important;
  }

  .section-head{
    margin-bottom:30px !important;
  }

  .section-head h2{
    margin-bottom:7px;
  }

  .section-head p{
    font-size:.98rem;
  }


  /* ==========================================
     HOW IT WORKS MOBILE
     ========================================== */

  #how-it-works .container-narrow{
    width:90%;
  }

  #how-it-works .section-head{
    margin-bottom:26px !important;
  }

  .faq-list{
    gap:8px;
  }

  .faq-item{
    padding:4px 18px;
  }

  .faq-item summary{
    padding:14px 0;

    font-size:.94rem;

    line-height:1.4;

    gap:12px;
  }

  .faq-item summary::after{
    margin-left:8px;

    font-size:1.2rem;
  }

  .faq-item p{
    font-size:.9rem;

    line-height:1.65;

    padding-bottom:16px;
  }


  /* ==========================================
     MOBILE STEPS
     ========================================== */

  .steps-grid{
    grid-template-columns:1fr;
  }


  /* ==========================================
     MOBILE CTA
     ========================================== */

  .cta-bar{
    flex-direction:column;

    align-items:flex-start;

    padding:30px 24px;
  }

  .cta-bar-actions{
    width:100%;

    flex-direction:column;
  }

  .cta-bar-actions .btn{
    width:100%;
  }


  /* ==========================================
     MOBILE FOOTER
     ========================================== */

  .footer-inner{
    flex-direction:column;

    align-items:flex-start;
  }
}


/* ============================================
   SMALL MOBILE
   ============================================ */

@media (max-width:480px){

  .container{
    width:90%;
  }

  .hero-copy h1{
    font-size:clamp(
      2.4rem,
      12vw,
      3.2rem
    );

    line-height:1.05;

    letter-spacing:-.045em;
  }

  .hero-sub{
    font-size:.95rem;
  }

  .eyebrow{
    font-size:.78rem;

    padding:7px 13px;
  }

  .hero-actions .btn{
    font-size:1rem;

    padding:14px 22px;
  }

  .hero-stats{
    gap:18px;
  }

  .hero-stats dt{
    font-size:1.3rem;
  }

  .hero-stats dd{
    font-size:.78rem;
  }

  .feature-body{
    padding:18px 20px 22px;
  }

  .step-card{
    padding:22px 20px;
  }

  .faq-item{
    padding:4px 16px;
  }

  .faq-item summary{
    font-size:.9rem;
  }

  .faq-item p{
    font-size:.88rem;
  }

  .cta-bar{
    padding:26px 20px;
  }
}


/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion:reduce){

  html{
    scroll-behavior:auto;
  }

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;

    animation-iteration-count:1 !important;

    transition-duration:.001ms !important;
  }

  .reveal{
    opacity:1;

    transform:none;
  }
}