@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@500;600&family=DM+Mono&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ============================================================
ROOT
============================================================ */

:root {
--bg: #f2f2ef;
--paper: #fafaf7;
--ink: #111111;
--sub: #686868;
--line: #d5d5d0;
--soft-line: #e5e5e0;
--accent: #111111;

--mono: "DM Mono", monospace;
--display: "Space Grotesk", sans-serif;
--tech: "Chakra Petch", sans-serif;
}

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

* {
  box-sizing: border-box;
  }

html {
margin: 0;
padding: 0;
scroll-behavior: smooth;
}

body {
margin: 0;
padding: 0;
min-height: 100vh;

background: var(--bg);
color: var(--ink);

font-family: var(--display);

-webkit-font-smoothing: antialiased;
text-rendering: optimizeLegibility;
}

a {
color: inherit;
text-decoration: none;
}

button,
a {
-webkit-tap-highlight-color: transparent;
}

/* ============================================================
PAGE
============================================================ */

.intro-page {
position: relative;
min-height: 100vh;
overflow-x: hidden;

background:
radial-gradient(
circle at 50% 15%,
rgba(255, 255, 255, 0.9),
transparent 38%
),
var(--bg);
}

/* ============================================================
BACKGROUND
============================================================ */

.intro-background {
position: fixed;
inset: 0;
z-index: 0;

overflow: hidden;

pointer-events: none;
}

.background-grid {
position: absolute;
inset: 0;

background-image:
linear-gradient(
rgba(20, 20, 20, 0.045) 1px,
transparent 1px
),
linear-gradient(
90deg,
rgba(20, 20, 20, 0.045) 1px,
transparent 1px
);

background-size: 42px 42px;

mask-image: linear-gradient(
to bottom,
black 0%,
rgba(0, 0, 0, 0.75) 60%,
transparent 100%
);
}

.background-noise {
position: absolute;
inset: -50%;

opacity: 0.035;

background-image:
url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");

animation: noiseMove 0.25s steps(2) infinite;
}

@keyframes noiseMove {
0% {
transform: translate(0, 0);
}

25% {
transform: translate(2%, -1%);
}

50% {
transform: translate(-1%, 2%);
}

75% {
transform: translate(1%, 1%);
}

100% {
transform: translate(0, 0);
}
}

/* ============================================================
BACKGROUND LINES
============================================================ */

.background-line {
position: absolute;

width: 1px;
height: 150vh;

top: -20vh;

background: linear-gradient(
to bottom,
transparent,
rgba(0, 0, 0, 0.08),
transparent
);

transform: rotate(18deg);
}

.line-1 {
left: 14%;
}

.line-2 {
left: 50%;
}

.line-3 {
right: 12%;
}

/* ============================================================
BACKGROUND CIRCLES
============================================================ */

.background-circle {
position: absolute;

border: 1px solid rgba(0, 0, 0, 0.07);
border-radius: 50%;
}

.circle-1 {
width: 620px;
height: 620px;

left: 50%;
top: 90px;

transform: translateX(-50%);
}

.circle-2 {
width: 900px;
height: 900px;

left: 50%;
top: -50px;

transform: translateX(-50%);
}

/* ============================================================
MAIN CARD
============================================================ */

.intro-card {
position: relative;
z-index: 1;

width: min(960px, calc(100% - 40px));

margin: 0 auto;
padding: 34px 0 0;

min-height: 100vh;
}

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

.intro-header {
display: flex;
align-items: center;
justify-content: space-between;

padding-bottom: 18px;

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

.eyebrow {
display: flex;
align-items: center;
gap: 12px;

margin: 0;

font-family: var(--mono);
font-size: 11px;
letter-spacing: 0.16em;

color: #333;
}

.eyebrow-line {
display: block;

width: 42px;
height: 1px;

background: #999;
}

.status {
display: flex;
align-items: center;
gap: 8px;

font-family: var(--mono);
font-size: 10px;
letter-spacing: 0.1em;

color: #777;
}

.status-dot {
width: 6px;
height: 6px;

border-radius: 50%;

background: #111;

animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
0%,
100% {
opacity: 1;
}

50% {
opacity: 0.25;
}
}

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

.intro-hero {
padding: 92px 0 78px;

text-align: center;
}

.hero-index {
margin: 0 0 25px;

font-family: var(--mono);
font-size: 10px;
letter-spacing: 0.22em;

color: #999;
}

.intro-logo {
margin: 0 auto;

width: min(760px, 92%);
}

.intro-logo img {
display: block;

width: 100%;
height: auto;

filter: contrast(1.03);

transition:
transform 0.5s ease,
opacity 0.5s ease;
}

.intro-logo img:hover {
transform: scale(1.015);
opacity: 0.9;
}

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

.hero-rule {
display: flex;
align-items: center;
justify-content: center;
gap: 7px;

margin: 35px auto 22px;
}

.hero-rule span {
display: block;

width: 5px;
height: 5px;

border-radius: 50%;

background: #222;
}

.hero-rule span:first-child,
.hero-rule span:last-child {
width: 3px;
height: 3px;

background: #aaa;
}

.intro-tagline {
margin: 0;

font-family: var(--tech);
font-size: 13px;
letter-spacing: 0.12em;

color: #555;
}

/* ============================================================
SECTION LABEL
============================================================ */

.section-label {
display: flex;
align-items: center;
gap: 13px;

margin-bottom: 14px;

font-family: var(--mono);
font-size: 11px;
letter-spacing: 0.15em;

color: #555;
}

.section-label span {
display: inline-flex;
align-items: center;
justify-content: center;

width: 25px;
height: 25px;

border: 1px solid #c8c8c3;

font-size: 9px;

color: #777;
}

/* ============================================================
ABOUT
============================================================ */

.about-section {
margin-bottom: 74px;
}

.about-box {
position: relative;

display: flex;
align-items: flex-start;
gap: 42px;

padding: 42px;

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

background:
linear-gradient(
135deg,
rgba(255, 255, 255, 0.9),
rgba(245, 245, 241, 0.7)
);

box-shadow:
0 20px 60px rgba(0, 0, 0, 0.035);
}

/* ============================================================
ABOUT CORNERS
============================================================ */

.about-corner {
position: absolute;

width: 12px;
height: 12px;

border-color: #777;
border-style: solid;
}

.about-corner-tl {
top: -1px;
left: -1px;

border-width: 1px 0 0 1px;
}

.about-corner-tr {
top: -1px;
right: -1px;

border-width: 1px 1px 0 0;
}

.about-corner-bl {
bottom: -1px;
left: -1px;

border-width: 0 0 1px 1px;
}

.about-corner-br {
right: -1px;
bottom: -1px;

border-width: 0 1px 1px 0;
}

/* ============================================================
ABOUT ICON
============================================================ */

.about-icon {
flex: 0 0 110px;

width: 110px;
height: 110px;

display: flex;
align-items: center;
justify-content: center;

border: 1px solid #d0d0cb;
border-radius: 50%;

background: rgba(255, 255, 255, 0.65);

position: relative;
}

.about-icon::before,
.about-icon::after {
content: "";

position: absolute;

background: #bbb;
}

.about-icon::before {
width: 1px;
height: 130%;

top: -15%;
left: 50%;
}

.about-icon::after {
width: 130%;
height: 1px;

left: -15%;
top: 50%;
}

.about-icon span {
position: relative;
z-index: 1;

font-family: Georgia, serif;
font-size: 48px;
font-weight: 400;

background: var(--paper);

padding: 0 8px;

line-height: 1;
}

/* ============================================================
ABOUT CONTENT
============================================================ */

.about-content {
flex: 1;
}

.about-content h2 {
margin: 0 0 20px;

font-family: var(--tech);
font-size: 23px;
font-weight: 600;
letter-spacing: 0.03em;
}

.about-content p {
margin: 0 0 16px;

font-size: 14px;
line-height: 2;

color: #4c4c4c;
}

.about-content p:last-child {
margin-bottom: 0;
}

.about-note {
padding-top: 12px;

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

font-family: var(--tech);
font-size: 12px !important;

color: #777 !important;
}

/* ============================================================
WARNING
============================================================ */

.about-warning {
display: flex;
align-items: center;
gap: 9px;

margin-top: 14px;

font-family: var(--mono);
font-size: 9px;
letter-spacing: 0.04em;

color: #888;
}

.warning-mark {
display: inline-flex;
align-items: center;
justify-content: center;

width: 15px;
height: 15px;

border: 1px solid #aaa;
border-radius: 50%;

font-size: 9px;
}
/* ============================================================
ACTION
============================================================ */

.action-section {
margin-bottom: 70px;
}

.action-button {
position: relative;

display: flex;
align-items: center;

min-height: 78px;

padding: 0 28px;

margin-bottom: 10px;

border: 1px solid #d0d0cb;

background: rgba(250, 250, 247, 0.82);

overflow: hidden;

transition:
transform 0.3s ease,
border-color 0.3s ease,
background 0.3s ease,
box-shadow 0.3s ease;
}

.action-button::before {
content: "";

position: absolute;

left: 0;
top: 0;
bottom: 0;

width: 3px;

background: #111;

transform: scaleY(0);

transform-origin: bottom;

transition: transform 0.3s ease;
}

.action-button {
transform: translateX(5px);

border-color: #999;

background: #fff;

box-shadow:
0 12px 35px rgba(0, 0, 0, 0.06);
}

.action-button:hover::before {
transform: scaleY(1);
}

/* ============================================================
START — MAIN ACTION
============================================================ */

.action-start {
min-height: 122px;

margin-bottom: 14px;

padding: 0 34px;

border: 2px solid #222;

background:
linear-gradient(
105deg,
rgba(255, 255, 255, 0.98),
rgba(238, 238, 234, 0.95)
);

box-shadow:
0 14px 40px rgba(0, 0, 0, 0.08);
}

.action-start::before {
width: 5px;

background: #111;

transform: scaleY(1);
}

.action-start {
transform: translateX(7px) translateY(-2px);

border-color: #111;

background: #fff;

box-shadow:
0 18px 45px rgba(0, 0, 0, 0.12);
}

.action-start .action-number {
width: 70px;

font-size: 12px;

color: #555;
}

.action-start .action-main {
gap: 7px;
}

.action-start .action-title {
font-size: 28px;
font-weight: 700;

letter-spacing: 0.08em;
}

.action-start .action-sub {
font-size: 13px;

color: #666;
}

.action-start .action-arrow {
font-size: 30px;

color: #222;
}

.action-start .action-arrow {
transform: translateX(8px);

color: #111;
}

/* ============================================================
X / PROFILE
============================================================ */

.action-x,
.action-profile {
min-height: 78px;
}

.action-x .action-title,
.action-profile .action-title {
font-size: 17px;
}

.action-x .action-sub,
.action-profile .action-sub {
font-size: 10px;
}

/* ============================================================
ACTION NUMBER
============================================================ */

.action-number {
width: 55px;

font-family: var(--mono);
font-size: 10px;
letter-spacing: 0.08em;

color: #999;
}

/* ============================================================
ACTION MAIN
============================================================ */

.action-main {
display: flex;
flex-direction: column;
gap: 5px;

flex: 1;
}

.action-title {
display: flex;
align-items: center;
gap: 8px;

font-family: var(--tech);
font-size: 18px;
font-weight: 600;

letter-spacing: 0.04em;
}

.action-sub {
font-family: var(--display);
font-size: 11px;

color: #888;
}

.x-symbol {
font-family: Arial, sans-serif;
font-size: 18px;
}

/* ============================================================
ACTION ARROW
============================================================ */

.action-arrow {
font-family: var(--mono);
font-size: 20px;

color: #777;

transition:
transform 0.3s ease,
color 0.3s ease;
}

.action-button .action-arrow {
transform: translateX(5px);

color: #111;
}

/* ============================================================
ACTION NUMBER
============================================================ */

.action-number {
width: 55px;

font-family: var(--mono);
font-size: 10px;
letter-spacing: 0.08em;

color: #999;
}

/* ============================================================
ACTION MAIN
============================================================ */

.action-main {
display: flex;
flex-direction: column;
gap: 5px;

flex: 1;
}

.action-title {
display: flex;
align-items: center;
gap: 8px;

font-family: var(--tech);
font-size: 18px;
font-weight: 600;

letter-spacing: 0.04em;
}

.action-sub {
font-family: var(--display);
font-size: 11px;

color: #888;
}

.x-symbol {
font-family: Arial, sans-serif;
font-size: 18px;
}

/* ============================================================
ACTION ARROW
============================================================ */

.action-arrow {
font-family: var(--mono);
font-size: 20px;

color: #777;

transition:
transform 0.3s ease,
color 0.3s ease;
}

.action-button:hover .action-arrow {
transform: translateX(5px);
color: #111;
}

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

.intro-footer {
display: grid;
grid-template-columns: 1fr auto 1fr;
align-items: center;

padding: 20px 0 30px;

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

font-family: var(--mono);
font-size: 9px;
letter-spacing: 0.08em;

color: #999;
}

.footer-left {
text-align: left;
}

.footer-center {
text-align: center;
}

.footer-right {
text-align: right;
}

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

@media (max-width: 720px) {

.intro-card {
width: min(100% - 32px, 600px);
}

.intro-hero {
padding: 72px 0 62px;
}

.about-box {
gap: 28px;
padding: 32px;
}

.about-icon {
flex-basis: 90px;


width: 90px;
height: 90px;


}

.about-icon span {
font-size: 40px;
}

}

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

@media (max-width: 560px) {

.intro-card {
width: calc(100% - 28px);
padding-top: 22px;
}

.intro-header {
padding-bottom: 14px;
}

.eyebrow {
font-size: 9px;
gap: 8px;
}

.eyebrow-line {
width: 24px;
}

.status {
font-size: 8px;
}

.intro-hero {
padding: 58px 0 52px;
}

.hero-index {
margin-bottom: 18px;
font-size: 8px;
}

.intro-logo {
width: 96%;
}

.hero-rule {
margin-top: 26px;
}

.intro-tagline {
font-size: 10px;
}

/* ABOUT */

.about-section {
margin-bottom: 55px;
}

.about-box {
flex-direction: column;


gap: 25px;

padding: 28px 24px;


}

.about-icon {
flex: none;


width: 78px;
height: 78px;


}

.about-icon span {
font-size: 34px;
}

.about-content h2 {
font-size: 19px;
}

.about-content p {
font-size: 13px;
line-height: 1.9;
}/* ACTION */

.action-button {
min-height: 76px;

padding: 0 18px;

}

.action-start {
min-height: 105px;

padding: 0 20px;

border-width: 2px;

}

.action-number {
width: 38px;

font-size: 9px;

}

.action-start .action-number {
width: 45px;

font-size: 10px;

}

.action-title {
font-size: 15px;
}

.action-start .action-title {
font-size: 23px;
}

.action-sub {
font-size: 10px;
}

.action-start .action-sub {
font-size: 11px;
}

.action-arrow {
font-size: 17px;
}

.action-start .action-arrow {
font-size: 25px;
}
/* FOOTER */

.intro-footer {
display: flex;
flex-direction: column;


gap: 9px;

padding-bottom: 24px;

text-align: center;


}

.footer-left,
.footer-center,
.footer-right {
text-align: center;
}

}

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

@media (max-width: 380px) {

.intro-card {
width: calc(100% - 20px);
}

.intro-hero {
padding-top: 48px;
}

.intro-tagline {
font-size: 9px;
}

.about-box {
padding: 24px 19px;
}

.about-content h2 {
font-size: 17px;
}

.action-button {
min-height: 76px;


padding: 0 14px;


}

.action-number {
width: 30px;
}

.action-title {
font-size: 14px;
}

.action-sub {
font-size: 9px;
}

}

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

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

*,
*::before,
*::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
scroll-behavior: auto !important;
transition-duration: 0.01ms !important;
}

}