/* DS DESIGN SYSTEM */

/* ── RESET ── */
*,
*::before,
*::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

/* ── CUSTOM PROPERTIES ── */
:root {
	/* Surfaces */
	--surface-primary: #fafcfe;
	--surface-elevated: #ffffff;
	--surface-recessed: #f0f4f8;
	--surface-subtle: #e8edf3;

	/* Blue: Biosynthetic Spectrum */
	--blue-glow: #e8f4fd;
	--blue-wash: #dbeafe;
	--blue-indicator: #93c5fd;
	--blue-primary: #3b82f6;
	--blue-vivid: #2563eb;
	--blue-deep: #1d4ed8;
	--blue-midnight: #1e3a5f;
	--blue-abyss: #0f172a;

	/* Neutrals (cool gray, blue-shifted) */
	--gray-50: #f8fafc;
	--gray-100: #f1f5f9;
	--gray-200: #e2e8f0;
	--gray-300: #cbd5e1;
	--gray-400: #94a3b8;
	--gray-500: #64748b;
	--gray-600: #475569;
	--gray-700: #334155;
	--gray-800: #1e293b;
	--gray-900: #0f172a;

	/* Semantic */
	--teal-vital: #14b8a6;
	--green-positive: #10b981;
	--red-alert: #ef4444;
	--amber-caution: #f59e0b;

	/* Typography */
	--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
	--font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Cascadia Code", monospace;

	/* Type Scale (Major Third 1.250) */
	--text-xs: 0.694rem;
	--text-sm: 0.833rem;
	--text-base: 1rem;
	--text-lg: 1.25rem;
	--text-xl: 1.563rem;
	--text-2xl: 1.953rem;
	--text-3xl: 2.441rem;
	--text-4xl: 3.052rem;
	--text-5xl: 3.815rem;

	/* Tracking */
	--tracking-tighter: -0.03em;
	--tracking-tight: -0.02em;
	--tracking-normal: 0;
	--tracking-wide: 0.02em;
	--tracking-widest: 0.08em;
	--tracking-ultra: 0.12em;

	/* Leading */
	--leading-tight: 1.15;
	--leading-snug: 1.25;
	--leading-normal: 1.5;
	--leading-relaxed: 1.625;

	/* Spacing (4px base) */
	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 0.75rem;
	--space-4: 1rem;
	--space-6: 1.5rem;
	--space-8: 2rem;
	--space-10: 2.5rem;
	--space-12: 3rem;
	--space-16: 4rem;
	--space-20: 5rem;
	--space-24: 6rem;
	--space-32: 8rem;

	/* Easings */
	--ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
	--ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);

	/* Durations */
	--duration-fast: 150ms;
	--duration-normal: 250ms;
	--duration-slow: 400ms;
}

/* ── BASE ── */
html {
	font-size: 16px;
	scroll-behavior: smooth;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font-family: var(--font-sans);
	font-size: var(--text-base);
	font-weight: 400;
	line-height: var(--leading-normal);
	color: var(--gray-700);
	background: radial-gradient(circle, rgba(148, 163, 184, 0.07) 1px, transparent 1px),
		radial-gradient(ellipse 80% 50% at 50% 0%, rgba(59, 130, 246, 0.03) 0%, transparent 100%),
		linear-gradient(180deg, var(--surface-primary) 0%, #ffffff 40%, var(--surface-recessed) 100%);
	background-size: 24px 24px, 100% 100%, 100% 100%;
	background-attachment: fixed;
}

/* Film grain overlay */
body::after {
	content: "";
	position: fixed;
	inset: 0;
	opacity: 0.012;
	pointer-events: none;
	z-index: 9999;
	background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── LAYOUT ── */
.container {
	max-width: 1280px;
	margin: 0 auto;
	padding: 0 clamp(1.5rem, 5vw, 4rem);
}

.content-narrow {
	max-width: 640px;
	margin: 0 auto;
}

.content-default {
	max-width: 768px;
	margin: 0 auto;
}

/* ── TYPOGRAPHY ── */
h1,
h2,
h3,
h4 {
	color: var(--gray-900);
	font-weight: 300;
}

h1 {
	font-size: clamp(2.5rem, 5vw + 1rem, var(--text-5xl));
	letter-spacing: var(--tracking-tighter);
	line-height: var(--leading-tight);
}

h2 {
	font-size: var(--text-3xl);
	letter-spacing: var(--tracking-tight);
	line-height: var(--leading-snug);
}

h3 {
	font-size: var(--text-xl);
	letter-spacing: var(--tracking-tight);
	line-height: var(--leading-snug);
	font-weight: 500;
}

.overline {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	font-weight: 500;
	letter-spacing: var(--tracking-widest);
	text-transform: uppercase;
	color: var(--blue-primary);
	display: block;
	margin-bottom: var(--space-3);
}

.lead {
	font-size: var(--text-lg);
	color: var(--gray-600);
	line-height: var(--leading-relaxed);
	max-width: 65ch;
}

/* ── SECTIONS ── */
.section {
	padding-block: clamp(4rem, 8vw, 8rem);
}

.section-hero {
	padding-block: clamp(6rem, 12vw, 10rem);
	text-align: center;
}

.section-header {
	margin-bottom: clamp(2rem, 4vw, 4rem);
}

.section-divider {
	border: none;
	height: 1px;
	background: linear-gradient(90deg, transparent 0%, var(--blue-indicator) 50%, transparent 100%);
	margin: 0;
}

/* ── NAVIGATION ── */
.nav {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 100;
	padding: var(--space-4) 0;
	background: rgba(250, 252, 254, 0.85);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid rgba(148, 163, 184, 0.1);
	transition: box-shadow var(--duration-normal) ease;
}

.nav.scrolled {
	box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.02);
}

.nav-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.nav-logo {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	font-weight: 600;
	letter-spacing: var(--tracking-widest);
	text-transform: uppercase;
	color: var(--blue-midnight);
	text-decoration: none;
}

.nav-links {
	display: flex;
	gap: var(--space-8);
	list-style: none;
}

.nav-links a {
	font-size: var(--text-sm);
	font-weight: 500;
	color: var(--gray-600);
	text-decoration: none;
	transition: color var(--duration-fast) ease;
}

.nav-links a:hover {
	color: var(--blue-primary);
}

/* ── HERO ── */
.hero-badge {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	padding: var(--space-1) var(--space-4);
	background: var(--blue-glow);
	border: 1px solid var(--blue-wash);
	border-radius: 100px;
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	font-weight: 500;
	letter-spacing: var(--tracking-wide);
	color: var(--blue-deep);
	margin-bottom: var(--space-8);
}

.hero-badge::before {
	content: "";
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: var(--blue-primary);
	animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
	0%,
	100% {
		opacity: 1;
	}
	50% {
		opacity: 0.4;
	}
}

.hero h1 {
	margin-bottom: var(--space-6);
}

.hero .lead {
	margin: 0 auto var(--space-10);
}

.hero-stats {
	display: flex;
	justify-content: center;
	gap: clamp(var(--space-8), 5vw, var(--space-16));
	margin-top: var(--space-12);
}

.stat {
	text-align: center;
}

.stat-value {
	font-family: var(--font-mono);
	font-size: var(--text-3xl);
	font-weight: 300;
	letter-spacing: var(--tracking-tighter);
	color: var(--blue-midnight);
	display: block;
}

.stat-label {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	letter-spacing: var(--tracking-ultra);
	text-transform: uppercase;
	color: var(--gray-500);
	margin-top: var(--space-2);
	display: block;
}

/* ── HOW IT WORKS ── */
.steps {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: var(--space-8);
}

.step {
	padding: var(--space-8);
	background: var(--surface-elevated);
	border: 1px solid rgba(148, 163, 184, 0.12);
	border-radius: 8px;
	box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.02);
	transition: transform var(--duration-normal) var(--ease-out-expo), box-shadow
		var(--duration-normal) ease;
}

.step:hover {
	transform: translateY(-2px);
	box-shadow: 0 4px 6px rgba(15, 23, 42, 0.04), 0 12px 24px rgba(15, 23, 42, 0.06);
}

.step-number {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	font-weight: 600;
	letter-spacing: var(--tracking-ultra);
	text-transform: uppercase;
	color: var(--blue-primary);
	margin-bottom: var(--space-4);
}

.step h3 {
	margin-bottom: var(--space-3);
}

.step p {
	font-size: var(--text-sm);
	color: var(--gray-600);
	line-height: var(--leading-relaxed);
}

/* ── FORMS ── */
.form-section {
	scroll-margin-top: 5rem;
}

.form-grid {
	display: grid;
	gap: var(--space-6);
}

.form-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--space-6);
}

@media (max-width: 640px) {
	.form-row {
		grid-template-columns: 1fr;
	}
}

.field {
	display: flex;
	flex-direction: column;
}

.field-label {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	font-weight: 500;
	letter-spacing: var(--tracking-widest);
	text-transform: uppercase;
	color: var(--gray-500);
	margin-bottom: var(--space-2);
}

.field-label .required {
	color: var(--blue-primary);
	margin-left: var(--space-1);
}

.field-input,
.field-select,
.field-textarea {
	width: 100%;
	padding: var(--space-3) var(--space-4);
	background: var(--surface-elevated);
	border: 1px solid var(--gray-200);
	border-radius: 6px;
	font-family: var(--font-sans);
	font-size: var(--text-base);
	color: var(--gray-900);
	transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
	appearance: none;
}

.field-input:focus,
.field-select:focus,
.field-textarea:focus {
	outline: none;
	border-color: var(--blue-primary);
	box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.field-input::placeholder,
.field-textarea::placeholder {
	color: var(--gray-400);
}

.field-textarea {
	resize: vertical;
	min-height: 120px;
}

.field-select {
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%2394A3B8'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 1rem center;
	padding-right: 2.5rem;
}

.field-error {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	color: var(--red-alert);
	margin-top: var(--space-1);
	display: none;
	letter-spacing: var(--tracking-wide);
}

.field-error.visible {
	display: block;
}

.field-input.invalid,
.field-select.invalid,
.field-textarea.invalid {
	border-color: var(--red-alert);
}

.field-input.invalid:focus,
.field-select.invalid:focus,
.field-textarea.invalid:focus {
	box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* ── BUTTONS ── */
.btn-primary {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	padding: var(--space-3) var(--space-8);
	background: var(--blue-deep);
	color: white;
	border: none;
	border-radius: 6px;
	font-family: var(--font-sans);
	font-size: var(--text-sm);
	font-weight: 500;
	cursor: pointer;
	transition: background var(--duration-fast) ease, transform var(--duration-fast)
		var(--ease-out-expo), box-shadow var(--duration-fast) ease;
	min-height: 44px;
	min-width: 44px;
}

.btn-primary:hover {
	background: var(--blue-midnight);
	transform: translateY(-1px);
	box-shadow: 0 4px 12px rgba(29, 78, 216, 0.25);
}

.btn-primary:active {
	transform: translateY(0);
	box-shadow: 0 1px 4px rgba(29, 78, 216, 0.2);
	transition-duration: 75ms;
}

.btn-primary:disabled {
	background: var(--gray-300);
	cursor: not-allowed;
	transform: none;
	box-shadow: none;
}

/* ── FORM STATUS ── */
.form-status {
	text-align: center;
	padding: var(--space-6);
	border-radius: 8px;
	display: none;
}

.form-status.visible {
	display: block;
}

.form-status.success {
	background: rgba(20, 184, 166, 0.06);
	border: 1px solid rgba(20, 184, 166, 0.2);
	color: var(--teal-vital);
}

.form-status.error {
	background: rgba(239, 68, 68, 0.06);
	border: 1px solid rgba(239, 68, 68, 0.2);
	color: var(--red-alert);
}

.form-status .status-title {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	font-weight: 600;
	letter-spacing: var(--tracking-widest);
	text-transform: uppercase;
	margin-bottom: var(--space-2);
}

.form-status .status-message {
	font-size: var(--text-sm);
}

/* ── FOOTER ── */
.footer {
	padding: var(--space-12) 0;
	border-top: 1px solid var(--surface-subtle);
	text-align: center;
}

.footer p {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	letter-spacing: var(--tracking-wide);
	color: var(--gray-400);
}

/* ── SCROLL REVEAL ── */
.reveal {
	opacity: 0;
	transform: translateY(24px);
	transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

.reveal.visible {
	opacity: 1;
	transform: translateY(0);
}

.reveal-group > .reveal:nth-child(2) {
	transition-delay: 80ms;
}
.reveal-group > .reveal:nth-child(3) {
	transition-delay: 160ms;
}
.reveal-group > .reveal:nth-child(4) {
	transition-delay: 240ms;
}

/* ── HONEYPOT (anti-bot, visually hidden) ── */
.hp-field {
	position: absolute;
	left: -9999px;
	top: -9999px;
	opacity: 0;
	height: 0;
	width: 0;
	overflow: hidden;
	pointer-events: none;
	tab-size: 0;
}

/* ── FOCUS (a11y) ── */
:focus-visible {
	outline: 2px solid var(--blue-primary);
	outline-offset: 2px;
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}

	.reveal {
		opacity: 1;
		transform: none;
	}
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
	.hero-stats {
		flex-direction: column;
		gap: var(--space-6);
	}

	.nav-links {
		display: none;
	}
}