:root {
--blue: #0a84ff;
--cyan: #22d3ee;
--grad: linear-gradient(90deg, #0a84ff 0%, #22d3ee 100%);
--ease: cubic-bezier(.16,1,.3,1);
}
[data-theme="dark"] {
--bg: #060a14;
--bg-2: #0b1322;
--fg: #f4f8ff;
--muted: #8aa0bf;
--line: rgba(255,255,255,.10);
--card: rgba(255,255,255,.04);
--glow: rgba(34,211,238,.25);
--logo-dark: block;
--logo-light: none;
}
[data-theme="light"] {
--bg: #f6f9ff;
--bg-2: #ffffff;
--fg: #0a1424;
--muted: #51637d;
--line: rgba(10,20,36,.10);
--card: rgba(10,40,80,.03);
--glow: rgba(10,132,255,.18);
--logo-dark: none;
--logo-light: block;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
.visually-hidden {
position: absolute !important;
width: 1px; height: 1px;
padding: 0; margin: -1px;
overflow: hidden; clip: rect(0 0 0 0);
white-space: nowrap; border: 0;
}
html { scroll-behavior: smooth; }
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
background: var(--bg);
color: var(--fg);
min-height: 100vh;
min-height: 100dvh;
display: flex;
flex-direction: column;
overflow-x: hidden;
transition: background .6s var(--ease), color .6s var(--ease);
-webkit-font-smoothing: antialiased;
-webkit-user-select: none;
user-select: none;
}
.backdrop {
position: fixed; inset: 0; z-index: 0;
pointer-events: none;
background: radial-gradient(ellipse 90% 70% at 50% 0%, var(--glow), transparent 70%);
transition: background .6s var(--ease);
}
header, main, footer { position: relative; z-index: 1; }
header {
display: flex; justify-content: flex-end; align-items: center;
padding: 22px clamp(20px, 5vw, 56px);
}
main {
flex: 1;
display: flex; flex-direction: column;
align-items: center; justify-content: center;
text-align: center;
padding: 24px clamp(20px, 5vw, 56px) 48px;
gap: 30px;
}
.logo {
width: min(440px, 78vw);
height: auto;
filter: drop-shadow(0 8px 40px var(--glow));
animation: rise .9s var(--ease) both;
}
.logo.d { display: var(--logo-dark); }
.logo.l { display: var(--logo-light); }
@keyframes rise {
from { opacity: 0; transform: translateY(16px) scale(.98); }
to   { opacity: 1; transform: none; }
}
.tagline {
font-size: clamp(1.05rem, 2.4vw, 1.5rem);
font-weight: 600;
letter-spacing: .04em;
background: var(--grad);
-webkit-background-clip: text; background-clip: text;
color: transparent;
animation: rise .9s .1s var(--ease) both;
}
.tagline .dot { color: var(--muted); -webkit-text-fill-color: var(--muted); }
.lead {
max-width: 680px;
font-size: clamp(.98rem, 1.8vw, 1.18rem);
line-height: 1.7;
color: var(--muted);
animation: rise .9s .2s var(--ease) both;
}
.lead strong { color: var(--fg); font-weight: 600; }
.status {
display: inline-flex; align-items: center; gap: 11px;
font-size: .82rem; font-weight: 500;
letter-spacing: .14em; text-transform: uppercase;
color: var(--muted);
animation: rise .9s .05s var(--ease) both;
}
.status .pulse {
position: relative;
width: 8px; height: 8px; border-radius: 50%;
background: var(--cyan);
box-shadow: 0 0 10px 1px var(--cyan);
}
.status .pulse::after {
content: ""; position: absolute; inset: 0; border-radius: 50%;
background: var(--cyan);
animation: ping 2s var(--ease) infinite;
}
@keyframes ping {
0%   { transform: scale(1);   opacity: .7; }
70%, 100% { transform: scale(3.2); opacity: 0; }
}
.cta {
animation: rise .9s .4s var(--ease) both;
}
.cta a {
--mx: 50%; --my: 50%;
position: relative;
display: inline-flex; align-items: center; gap: 12px;
padding: 16px 32px; border-radius: 999px;
color: var(--fg);
font-weight: 600; font-size: .95rem;
letter-spacing: .08em; text-transform: uppercase;
text-decoration: none;
background: var(--card);
overflow: hidden; isolation: isolate;
transition: transform .4s var(--ease), box-shadow .4s var(--ease), color .4s var(--ease);
}
.cta a::before {
content: ""; position: absolute; inset: 0; border-radius: inherit;
padding: 1px; background: var(--grad);
-webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
-webkit-mask-composite: xor; mask-composite: exclude;
z-index: 1;
}
.cta a::after {
content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
background: radial-gradient(120px circle at var(--mx) var(--my),
rgba(34,211,238,.55), rgba(10,132,255,.35) 40%, transparent 70%);
opacity: 0;
transition: opacity .35s var(--ease);
}
.cta a:hover {
transform: translateY(-2px);
box-shadow: 0 14px 34px -16px var(--blue);
}
.cta a:hover::after { opacity: 1; }
.cta a .label, .cta a .arrow { position: relative; z-index: 2; }
.cta a .arrow {
width: 16px; height: 16px;
transition: transform .4s var(--ease);
}
.cta a:hover .arrow { transform: translateX(4px); }
.overlay {
position: fixed; inset: 0; z-index: 50;
display: grid; place-items: center;
padding: 24px;
background: rgba(3, 7, 18, .55);
backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
opacity: 0; visibility: hidden;
transition: opacity .35s var(--ease), visibility .35s var(--ease);
}
.overlay.open { opacity: 1; visibility: visible; }
.modal {
position: relative;
width: min(460px, 100%);
background: var(--bg-2);
border-radius: 22px;
padding: 34px clamp(22px, 5vw, 38px) 30px;
box-shadow: 0 30px 80px -20px rgba(0,0,0,.6);
transform: translateY(18px) scale(.97);
opacity: 0;
transition: transform .4s var(--ease), opacity .4s var(--ease);
}
.overlay.open .modal { transform: none; opacity: 1; }
.modal::before {
content: ""; position: absolute; inset: 0; border-radius: inherit;
padding: 1px; background: var(--grad); opacity: .6;
-webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
-webkit-mask-composite: xor; mask-composite: exclude;
pointer-events: none;
}
.modal h2 {
font-size: 1.45rem; font-weight: 700; margin-bottom: 6px;
letter-spacing: -.01em;
}
.modal .sub { color: var(--muted); font-size: .92rem; margin-bottom: 22px; }
.modal .close {
position: absolute; top: 16px; right: 16px;
width: 36px; height: 36px; border-radius: 50%;
border: 1px solid var(--line); background: var(--card);
color: var(--muted); cursor: pointer;
display: grid; place-items: center;
transition: color .25s, border-color .25s, transform .25s var(--ease);
}
.modal .close:hover { color: var(--fg); border-color: var(--cyan); transform: rotate(90deg); }
.modal .close svg { width: 18px; height: 18px; }
.field { margin-bottom: 16px; text-align: left; }
.field label {
display: block; font-size: .78rem; font-weight: 600;
letter-spacing: .04em; color: var(--muted);
margin-bottom: 7px; text-transform: uppercase;
}
.field input, .field textarea {
width: 100%; font: inherit; color: var(--fg);
background: var(--card);
border: 1px solid var(--line); border-radius: 12px;
padding: 12px 14px;
transition: border-color .25s, box-shadow .25s;
-webkit-user-select: text; user-select: text;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: .6; }
.field input:focus, .field textarea:focus {
outline: none; border-color: var(--cyan);
box-shadow: 0 0 0 3px var(--glow);
}
.modal .submit {
--mx: 50%; --my: 50%;
position: relative;
width: 100%; margin-top: 6px;
font: inherit; font-weight: 600; font-size: .95rem;
letter-spacing: .08em; text-transform: uppercase;
color: var(--fg); cursor: pointer;
border: none; border-radius: 999px; padding: 16px;
background: var(--card);
overflow: hidden; isolation: isolate;
transition: transform .4s var(--ease), box-shadow .4s var(--ease), color .4s var(--ease);
}
.modal .submit::before {
content: ""; position: absolute; inset: 0; border-radius: inherit;
padding: 1px; background: var(--grad); z-index: 1;
-webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
-webkit-mask-composite: xor; mask-composite: exclude;
}
.modal .submit::after {
content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
background: radial-gradient(140px circle at var(--mx) var(--my),
rgba(34,211,238,.55), rgba(10,132,255,.35) 40%, transparent 70%);
opacity: 0; transition: opacity .35s var(--ease);
}
.modal .submit > span { position: relative; z-index: 2; }
.modal .submit:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -16px var(--blue); }
.modal .submit:hover::after { opacity: 1; }
.form-msg {
margin-top: 12px; min-height: 1.2em;
font-size: .85rem; text-align: center;
opacity: 0; transition: opacity .3s var(--ease);
}
.form-msg.show { opacity: 1; }
.form-msg.ok { color: var(--cyan); }
.form-msg.err { color: #ff6b6b; }
.modal .submit[disabled] { opacity: .6; pointer-events: none; }
.modal .direct {
margin-top: 18px; text-align: center;
font-size: .85rem; color: var(--muted);
}
.modal .direct a { color: var(--fg); text-decoration: none; border-bottom: 1px solid var(--line); transition: border-color .25s; }
.modal .direct a:hover { border-color: var(--cyan); }
footer {
text-align: center;
padding: 26px clamp(20px, 5vw, 56px) 34px;
color: var(--muted);
font-size: .85rem;
border-top: 1px solid var(--line);
display: flex; flex-direction: column; gap: 6px;
}
footer a { color: var(--fg); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color .25s; }
footer a:hover { border-color: var(--cyan); }
.theme-toggle {
width: 46px; height: 46px; border-radius: 50%;
border: 1px solid var(--line); background: var(--card);
color: var(--fg); cursor: pointer;
display: grid; place-items: center;
backdrop-filter: blur(8px);
transition: transform .4s var(--ease), border-color .3s, background .3s;
}
.theme-toggle:hover { transform: rotate(25deg) scale(1.05); border-color: var(--cyan); }
.theme-toggle svg { width: 22px; height: 22px; }
.theme-toggle .moon { display: var(--logo-dark); }
.theme-toggle .sun  { display: var(--logo-light); }
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto; }
}