@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--dark-bg-primary);
    color: var(--dark-text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.bg-fx {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 60% at 20% 20%, var(--dark-primary-12) 0%, var(--transparent) 55%),
        radial-gradient(ellipse 50% 50% at 80% 80%, var(--dark-secondary-15) 0%, var(--transparent) 55%);
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--dark-primary-05) 1px, transparent 1px),
        linear-gradient(90deg, var(--dark-primary-05) 1px, transparent 1px);
    background-size: 52px 52px;
    pointer-events: none;
    z-index: 0;
}

.app {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 32px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 0;
    border-bottom: 1px solid var(--dark-primary-10);
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.brand-name {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 15px;
    color: var(--dark-text);
    letter-spacing: -0.02em;
}

.brand-name .q { color: var(--dark-primary); }

.back-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--dark-secondary-40);
    text-decoration: none;
    text-transform: uppercase;
    transition: color 0.15s;
}

.back-btn:hover { color: var(--dark-secondary); }

.page {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 0 80px;
}

.center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 420px;
    width: 100%;
}

.svg-wrap {
    width: 200px;
    height: 200px;
    margin-bottom: 36px;
}

.cs-svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.ring { transform-origin: 130px 130px; }
.r1 { animation: spin-cw  55s linear infinite; }
.r2 { animation: spin-ccw 38s linear infinite; }
.r3 { animation: spin-cw  26s linear infinite; }
.r4 { animation: spin-ccw 18s linear infinite; }

@keyframes spin-cw  { from { transform: rotate(0deg);   } to { transform: rotate(360deg);  } }
@keyframes spin-ccw { from { transform: rotate(0deg);   } to { transform: rotate(-360deg); } }

.core {
    animation: core-breathe 3s ease-in-out infinite;
    transform-origin: 130px 130px;
}

@keyframes core-breathe {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.08); }
}

.pulse-ring {
    animation: pulse-out 3s ease-out infinite;
    transform-origin: 130px 130px;
}

.pr2 { animation-delay: 1.5s; }

@keyframes pulse-out {
    0%   { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(3.5); opacity: 0; }
}

.dot-node {
    animation: dot-blink 4s ease-in-out infinite;
}

.dn1 { animation-delay: 0s;    }
.dn2 { animation-delay: 0.5s;  }
.dn3 { animation-delay: 1s;    }
.dn4 { animation-delay: 1.5s;  }
.dn5 { animation-delay: 2s;    }
.dn6 { animation-delay: 2.5s;  }
.dn7 { animation-delay: 3s;    }
.dn8 { animation-delay: 3.5s;  }

@keyframes dot-blink {
    0%, 100% { opacity: 0.4; }
    50%       { opacity: 1;   }
}

.tracer {
    animation: orbit-trace 6s linear infinite;
    transform-origin: 130px 130px;
}

@keyframes orbit-trace {
    from { transform: rotate(0deg)   translateY(-110px) rotate(0deg);   }
    to   { transform: rotate(360deg) translateY(-110px) rotate(-360deg); }
}

.label-row {
    margin-bottom: 14px;
}

.label-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--dark-secondary);
    background: var(--dark-primary-12);
    border: 1px solid var(--dark-primary-25);
    padding: 3px 12px;
    border-radius: 20px;
}

.title {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: clamp(40px, 7vw, 60px);
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--dark-text);
    margin-bottom: 14px;
}

.title .q { color: var(--dark-primary); }

.sub {
    font-size: 13px;
    color: var(--white-35);
    font-weight: 300;
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 320px;
}

.progress-wrap {
    width: 100%;
    margin-bottom: 36px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.progress-bar {
    width: 100%;
    height: 3px;
    background: var(--dark-primary-12);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--dark-primary), var(--dark-secondary));
    animation: progress-scan 3s ease-in-out infinite;
    box-shadow: 0 0 8px var(--dark-primary-50);
}

@keyframes progress-scan {
    0%   { width: 0%;   margin-left: 0%;   }
    50%  { width: 60%;  margin-left: 20%;  }
    100% { width: 0%;   margin-left: 100%; }
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-labels span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dark-secondary-40);
}

.home-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dark-secondary);
    text-decoration: none;
    border: 1px solid var(--dark-primary-25);
    background: var(--dark-primary-08);
    padding: 10px 24px;
    border-radius: 8px;
    box-shadow: 0 0 12px var(--dark-primary-12);
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.home-btn:hover {
    border-color: var(--dark-primary-50);
    background: var(--dark-primary-15);
    box-shadow: 0 0 18px var(--dark-primary-20);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-primary-05); }
::-webkit-scrollbar-thumb { background: var(--dark-primary-25); border-radius: 3px; }
::selection { background: var(--dark-primary-30); color: var(--dark-text); }

@media (max-width: 600px) {
    .app { padding: 0 16px; }
    .svg-wrap { width: 160px; height: 160px; }
}