:root {
	--bg: #05070a;
	--bg-panel: #0b0f17;
	--bg-panel-2: #0e1420;
	--green: #00e5a0;
	--green-dim: #0a5c46;
	--red: #ff3b3b;
	--red-dim: #4a1414;
	--steel: #5b7a99;
	--steel-dim: #2a3a4a;
	--text: #e8ecf1;
	--text-dim: #8a97a8;
	--border: #1c2532;

	--font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
	--font-body: 'Inter', -apple-system, sans-serif;

	--hud-blur: blur(8px);
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}
	* {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
}

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

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

::selection {
	color: var(--text);
	background: var(--green-dim);
}

:focus-visible {
	outline: 2px solid var(--green);
	outline-offset: 3px;
}

/* ============================================
   NAV
   ============================================ */
.nav {
	position: fixed;
	display: flex;
	top: 0;
	left: 0;
	right: 0;
	z-index: 100;
	align-items: center;
	justify-content: space-between;
	padding: 20px clamp(20px, 4vw, 48px);
	font-family: var(--font-mono);
	font-size: 13px;
	background: linear-gradient(to bottom, rgba(5, 7, 10, 0.85), transparent);
	backdrop-filter: var(--hud-blur);
}

.nav__brand {
	display: flex;
	align-items: center;
	gap: 10px;
	font-weight: 700;
	letter-spacing: 0.12em;
	font-size: 15px;
}

.nav__dot {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--green);
	box-shadow: 0 0 8px var(--green);
	transition:
		background 0.3s,
		box-shadow 0.3s;
}
.nav__dot.alert {
	background: var(--red);
	box-shadow: 0 0 12px var(--red);
}

.nav__links {
	display: flex;
	gap: 32px;
	color: var(--text-dim);
}
.nav__links a {
	transition: color 0.2s;
}
.nav__links a:hover {
	color: var(--green);
}

.nav__status {
	color: var(--text-dim);
	letter-spacing: 0.04em;
}
.nav__status-val {
	color: var(--text);
	font-weight: 600;
}

@media (max-width: 760px) {
	.nav__links {
		display: none;
	}
}

@media (max-width: 400px) {
    .hud__panel--bottom-right{
        display: none;
    }
}

/* ============================================
   HERO
   ============================================ */
.hero {
	position: relative;
	height: 100svh;
	min-height: 560px;
	background: radial-gradient(ellipse at 50% 40%, #0a0f16 0%, #05070a 70%);
	overflow: hidden;
}

#net-canvas {
	position: absolute;
	display: block;
	inset: 0;
	width: 100%;
	height: 100%;
}

.hero__content {
	position: absolute;
	left: clamp(20px, 6vw, 72px);
	bottom: clamp(90px, 14vh, 160px);
	max-width: 640px;
	pointer-events: none;
	z-index: 10;
}
.hero__content > * {
	pointer-events: auto;
}

.hero__eyebrow {
	margin-bottom: 18px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.18em;
	color: var(--green);
}

.hero__title {
	font-family: var(--font-mono);
	font-weight: 800;
	font-size: clamp(2.2rem, 5.5vw, 4.2rem);
	line-height: 1.05;
	letter-spacing: -0.01em;
	text-shadow: 0 0 40px rgba(0, 229, 160, 0.15);
	color: var(--text);
}

.hero__cursor {
	color: var(--green);
	animation: blink 1s step-end infinite;
}
@keyframes blink {
	50% {
		opacity: 0;
	}
}

.hero__subtitle {
	margin-top: 22px;
	max-width: 520px;
	font-size: clamp(0.95rem, 1.6vw, 1.1rem);
	color: var(--text-dim);
}

.hero__actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 14px;
	margin-top: 32px;
}

@media (max-width: 625px) {
    .hero__actions {
        flex-direction: column;
        align-items: flex-start;
    }
    
}

.hero__cta {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	padding: 14px 22px;
	font-family: var(--font-mono);
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.04em;
	color: var(--bg);
	background: var(--green);
	border: 1px solid var(--green);
	border-radius: 2px;
	transition:
		transform 0.2s,
		box-shadow 0.2s,
		opacity 0.2s;
	cursor: pointer;
}
.hero__cta:hover {
	transform: translateY(-2px);
	box-shadow: 0 8px 24px rgba(0, 229, 160, 0.25);
}
.hero__cta-arrow {
	transition: transform 0.2s;
}
.hero__cta:hover .hero__cta-arrow {
	transform: translateY(3px);
}

.hero__cta--ghost {
	background: transparent;
	color: var(--text);
	border-color: var(--steel-dim);
}
.hero__cta--ghost:hover {
	color: var(--red);
	border-color: var(--red);
	box-shadow: 0 8px 24px rgba(255, 59, 59, 0.15);
}
.hero__cta-bolt {
	transition: transform 0.2s;
}
.hero__cta--ghost:hover .hero__cta-bolt {
	transform: scale(1.15);
}
.hero__cta--ghost:disabled {
    transform: none;
	color: var(--text-dim);
	border-color: var(--steel-dim);
	box-shadow: none;
    cursor: not-allowed;
	opacity: 0.4;
}

.hero__scroll-hint {
	position: absolute;
	bottom: 28px;
	right: clamp(20px, 6vw, 72px);
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.3em;
	writing-mode: vertical-rl;
	color: var(--text-dim);
	opacity: 0.7;
	z-index: 10;
}

/* ---- HUD ---- */
.hud {
	position: absolute;
	inset: 0;
	padding: clamp(70px, 10vh, 110px) clamp(20px, 6vw, 72px) 0;
	pointer-events: none;
	z-index: 5;
}

.hud__panel {
	position: absolute;
	font-family: var(--font-mono);
}

.hud__panel--top-left {
	top: clamp(70px, 10vh, 110px);
	left: clamp(20px, 6vw, 72px);
}
.hud__panel--top-right {
	top: clamp(70px, 10vh, 110px);
	right: clamp(20px, 6vw, 72px);
	text-align: right;
}
.hud__panel--bottom-left {
	bottom: 90px;
	right: clamp(100px, 45vw, 220px);
}
.hud__panel--bottom-right {
	bottom: 90px;
	right: clamp(20px, 6vw, 72px);
	text-align: right;
}

.hud__label {
	font-size: 10px;
	letter-spacing: 0.14em;
	color: var(--text-dim);
	margin-bottom: 6px;
}

.hud__value {
	font-size: 20px;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
	color: var(--text);
	transition: color 0.3s;
}
.hud__value--status {
	color: var(--green);
}
.hud__value--status.alert {
	color: var(--red);
}

@media (max-width: 815px) {
	.hud__panel--bottom-left,
	.hud__panel--top-right {
		display: none;
	}
}

/* ---- Terminal ---- */
.terminal {
	position: absolute;
	display: none;
	top: clamp(70px, 10vh, 110px);
	right: clamp(20px, 6vw, 72px);
	width: 300px;
	max-width: 40vw;
	font-family: var(--font-mono);
	font-size: 11px;
	background: rgba(11, 15, 23, 0.75);
	border: 1px solid var(--border);
	backdrop-filter: var(--hud-blur);
	z-index: 6;
}

@media (min-width: 900px) {
	.terminal {
		display: block;
	}
}

.terminal__header {
	padding: 8px 12px;
	border-bottom: 1px solid var(--border);
	letter-spacing: 0.1em;
	font-size: 10px;
	color: var(--text-dim);
}

.terminal__body {
	display: flex;
	flex-direction: column-reverse;
	gap: 4px;
	padding: 8px 12px;
	height: 130px;
	overflow: hidden;
}

.terminal__line {
	line-height: 1.5;
	color: var(--steel);
	animation: fadeIn 0.3s forwards;
	opacity: 0;
}
.terminal__line--info {
	color: var(--steel);
}
.terminal__line--alert {
	color: var(--red);
	font-weight: 600;
}
.terminal__line--resolved {
	color: var(--green);
}

@keyframes fadeIn {
	to {
		opacity: 1;
	}
}

/* ============================================
   MAIN SECTIONS
   ============================================ */
.section {
	padding: clamp(70px, 12vh, 140px) 0;
	border-top: 1px solid var(--border);
}
.section--alt {
	background: var(--bg-panel);
}

.section__inner {
    margin: 0 auto;
	padding: 0 clamp(20px, 6vw, 72px);
	max-width: 1080px;
}
.section__inner--narrow {
	max-width: 720px;
}

.doc-meta {
	display: flex;
	align-items: center;
	gap: 16px;
	margin-bottom: 24px;
	font-family: var(--font-mono);
}

.doc-meta__tag {
	padding: 5px 10px;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.1em;
	border: 1px solid currentColor;
}
.doc-meta__tag--problem {
	color: var(--red);
}
.doc-meta__tag--approach {
	color: var(--steel);
}
.doc-meta__tag--arch {
	color: var(--green);
}
.doc-meta__tag--result {
	color: var(--green);
}
.doc-meta__tag--contact {
	color: var(--text-dim);
}

.doc-meta__time {
	font-size: 11px;
	color: var(--text-dim);
	letter-spacing: 0.06em;
}

.section__title {
	margin-bottom: 32px;
	max-width: 800px;
	font-family: var(--font-mono);
	font-size: clamp(1.6rem, 3.4vw, 2.6rem);
	font-weight: 700;
	line-height: 1.2;
	letter-spacing: -0.01em;
}

.section__lead {
	max-width: 680px;
	font-size: clamp(1rem, 1.4vw, 1.15rem);
	color: var(--text-dim);
}

.section__footnote {
	margin-top: 24px;
	font-family: var(--font-mono);
	font-size: 11px;
	color: var(--text-dim);
	opacity: 0.6;
}

.section__grid {
	display: grid;
	grid-template-columns: 1.3fr 1fr;
	align-items: start;
	gap: 48px;
}
@media (max-width: 800px) {
	.section__grid {
		grid-template-columns: 1fr;
	}
}

/* ---- stats (problem section) ---- */
.stat-block {
	display: flex;
	flex-direction: column;
	gap: 24px;
}
.stat {
	padding-left: 18px;
	border-left: 2px solid var(--red);
}
.stat__value {
	font-family: var(--font-mono);
	font-size: 2.4rem;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	color: var(--text);
}
.stat__unit {
	font-size: 1.1rem;
	color: var(--text-dim);
	margin-left: 4px;
}
.stat__label {
	color: var(--text-dim);
	font-size: 0.9rem;
	margin-top: 6px;
}

/* ---- approach cards ---- */
.approach-cards {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1px;
	margin-top: 40px;
	background: var(--border);
	border: 1px solid var(--border);
}
@media (max-width: 800px) {
	.approach-cards {
		grid-template-columns: 1fr;
	}
}

.approach-card {
	padding: 32px 28px;
	background: var(--bg-panel);
}
.approach-card__num {
	margin-bottom: 16px;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.12em;
	color: var(--green);
}
.approach-card h3 {
	margin-bottom: 12px;
	font-family: var(--font-mono);
	font-size: 1.1rem;
	font-weight: 600;
}
.approach-card p {
	color: var(--text-dim);
	font-size: 0.92rem;
}

/* ---- architecture flow ---- */
.arch-flow {
	display: flex;
	align-items: stretch;
	gap: 0;
	margin-top: 48px;
}
@media (max-width: 800px) {
	.arch-flow {
		flex-direction: column;
	}
}

.arch-step {
	flex: 1;
	padding: 8px;
}
.arch-step__icon {
	margin-bottom: 12px;
	font-size: 22px;
	color: var(--green);
}
.arch-step__label {
	margin-bottom: 10px;
	font-family: var(--font-mono);
	font-weight: 700;
	font-size: 1rem;
}
.arch-step__desc {
    font-size: 0.88rem;
	color: var(--text-dim);
}

.arch-connector {
	align-self: center;
	width: 60px;
	height: 1px;
	background: repeating-linear-gradient(to right, var(--steel) 0, var(--steel) 4px, transparent 4px, transparent 8px);
}
@media (max-width: 800px) {
	.arch-connector {
		width: 1px;
		height: 32px;
		margin-left: 8px;
	}
}

.tech-stack {
	margin-top: 56px;
	padding-top: 28px;
	border-top: 1px solid var(--border);
}
.tech-stack__label {
	margin-bottom: 14px;
	font-family: var(--font-mono);
	font-size: 10px;
	letter-spacing: 0.14em;
	color: var(--text-dim);
}
.tech-stack__items {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	font-family: var(--font-mono);
	font-size: 12px;
}
.tech-stack__items span {
	padding: 6px 12px;
	color: var(--steel);
	border: 1px solid var(--border);
}

/* ---- result ---- */
.result-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 32px;
	margin-bottom: 48px;
}
@media (max-width: 800px) {
	.result-grid {
		grid-template-columns: 1fr;
		gap: 28px;
	}
}
.result-stat__value {
	font-family: var(--font-mono);
	font-size: clamp(2.4rem, 5vw, 3.4rem);
	font-weight: 800;
	font-variant-numeric: tabular-nums;
	color: var(--green);
}
.result-stat__label {
	color: var(--text-dim);
	font-size: 0.88rem;
	margin-top: 8px;
	max-width: 240px;
}

/* ---- contact ---- */
.section--contact {
	border-bottom: 1px solid var(--border);
}
.contact-links {
	display: flex;
	gap: 28px;
	margin-top: 32px;
	font-family: var(--font-mono);
	font-size: 14px;
	flex-wrap: wrap;
}
.contact-link {
	color: var(--green);
	border-bottom: 1px solid transparent;
	transition: border-color 0.2s;
}
.contact-link:hover {
	border-color: var(--green);
}

[data-reveal] {
	opacity: 0;
	transition:
		opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
		transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
		filter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
	will-change: transform, opacity;
}

[data-reveal='up'] {
	transform: translateY(22px);
	filter: blur(4px);
}
[data-reveal='left'] {
	transform: translateX(-32px);
	filter: blur(4px);
}
[data-reveal='right'] {
	transform: translateX(32px);
	filter: blur(4px);
}

[data-reveal].is-visible {
	opacity: 1;
	transform: translate(0, 0);
	filter: blur(0);
}

@media (prefers-reduced-motion: reduce) {
	[data-reveal] {
		opacity: 1;
		transform: none;
		filter: none;
		transition: none;
	}
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 8px;
	padding: 28px clamp(20px, 6vw, 72px);
	font-family: var(--font-mono);
	font-size: 11px;
	color: var(--text-dim);
}