:root{
  --color-bg-primary:#07090e;
  --color-bg-glass:rgba(15,23,42,0.7);
  --color-accent-violet:#8b5cf6;
  --color-accent-cyan:#06b6d4;
  --color-accent-lime:#d6ff3f;
  --color-text-primary:#f3f5fa;
  --color-text-glass:#e2e8f0;
  --gradient-border:linear-gradient(90deg,#8b5cf6 30%,#06b6d4 70%);
  --shadow-glass:0 4px 32px 0 rgba(139,92,246,0.18);

  --font-heading:'Orbitron','Rajdhani','Segoe UI',Arial,sans-serif;
  --font-body:'Inter','Segoe UI',Arial,sans-serif;

  --fs-xl:clamp(2rem,4vw,2.8rem);
  --fs-lg:clamp(1.6rem,3vw,2rem);
  --fs-md:clamp(1.3rem,2.2vw,1.5rem);
  --fs-base:1rem;
  --fs-sm:0.875rem;

  --space-0:0;
  --space-1:4px;
  --space-2:8px;
  --space-3:16px;
  --space-4:24px;
  --space-5:32px;
  --space-6:48px;
  --space-7:64px;

  --radius-lg:24px;
  --radius-md:12px;
  --radius-sm:8px;

  --container-max:1200px;
  --container-pad:24px;
}

@media (max-width:768px){
  :root{
    --container-pad:16px;
  }
}

*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
  min-width:0;
}

html,body{
  height:100%;
}

body{
  font-family:var(--font-body);
  background:var(--color-bg-primary);
  color:var(--color-text-primary);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,video{
  max-width:100%;
  height:auto;
  display:block;
}

a{
  color:var(--color-accent-cyan);
  text-decoration:none;
  transition:color .2s ease, box-shadow .2s ease;
}

a:hover{
  text-decoration:underline;
}

button,input,textarea,select{
  font:inherit;
  color:inherit;
  background:none;
  border:none;
  outline:none;
}

button{
  cursor:pointer;
}

ul{
  list-style:none !important;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-heading);
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  margin-bottom:var(--space-3);
}

h1{font-size:var(--fs-xl);}
h2{font-size:var(--fs-lg);}
h3{font-size:var(--fs-md);}
h4{font-size:1.125rem;}
h5{font-size:1rem;}
h6{font-size:0.875rem;}

p{
  font-weight:500;
  margin-bottom:var(--space-3);
}

ul,ol{
  margin-bottom:var(--space-3);
}

blockquote{
  margin-bottom:var(--space-4);
  padding-left:var(--space-3);
  border-left:2px solid var(--color-accent-cyan);
  color:var(--color-text-glass);
}

h1:last-child,
h2:last-child,
h3:last-child,
h4:last-child,
h5:last-child,
h6:last-child,
p:last-child,
ul:last-child,
ol:last-child,
blockquote:last-child{
  margin-bottom:0;
}

.container{
  width:100%;
  max-width:var(--container-max);
  margin-inline:auto;
  padding-inline:var(--container-pad);
}

.section{
  padding-block:var(--space-6);
}

@media (max-width:768px){
  .section{
    padding-block:var(--space-5);
  }
}

.glass{
  background:var(--color-bg-glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-glass);
  position:relative;
}

.glass::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  padding:2px;
  background:var(--gradient-border);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
}

.card{
  padding:var(--space-4);
}

@media (max-width:768px){
  .card{
    padding:var(--space-3);
  }
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--radius-md);
  font-family:var(--font-heading);
  font-size:0.875rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  background:var(--color-bg-glass);
  color:var(--color-text-primary);
  position:relative;
  backdrop-filter:blur(12px);
  transition:all .2s ease;
}

.btn::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  padding:2px;
  background:var(--gradient-border);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
}

.btn:hover{
  box-shadow:0 0 12px var(--color-accent-violet);
}

.btn:active{
  box-shadow:0 0 18px var(--color-accent-cyan);
}

.btn-primary{
  color:#fff;
}

.btn-secondary{
  color:var(--color-accent-cyan);
}

.input,
textarea,
select{
  width:100%;
  padding:10px 12px;
  border-radius:var(--radius-md);
  background:var(--color-bg-glass);
  color:var(--color-text-glass);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-glass);
}

.input:focus,
textarea:focus,
select:focus,
.btn:focus{
  box-shadow:0 0 0 2px var(--color-accent-cyan);
}

.flex{
  display:flex;
  gap:var(--space-3);
}

.flex-col{
  display:flex;
  flex-direction:column;
  gap:var(--space-3);
}

.flex-center{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:var(--space-3);
}

.flex-between{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--space-3);
}

.nav-toggle{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.hr{
  height:1px;
  width:100%;
  background:var(--gradient-border);
  opacity:.5;
}
html, body {
  overflow-x: clip;
  max-width: 100%;
}

img, video, svg {
  max-width: 100%;
  height: auto;
}