/* ============================================
   Investyum v2 — "Surgical Precision"
   Charcoal + Lime  |  Space Grotesk + Inter + JetBrains Mono
   ============================================ */

:root {
    --ink:       #0D0D0F;
    --slate:     #1A1A1A;
    --paper:     #F5F0EB;
    --sand:      #E8E4D9;
    --mist:      #6B7280;
    --lime:      #C4F550;
    --lime-dim:  rgba(196, 245, 80, 0.1);

    --font-head: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--ink);
    color: var(--sand);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    transition: background 0.3s ease, backdrop-filter 0.3s ease;
}

.nav.scrolled {
    background: rgba(13, 13, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-logo { text-decoration: none; }

.wordmark {
    height: 28px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--mist);
    text-decoration: none;
    padding: 0.5rem 0.25rem;
    transition: color 0.15s ease;
}

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

.nav-cta {
    color: var(--lime) !important;
}

.nav-links a:focus-visible {
    outline: 2px solid var(--lime);
    outline-offset: 4px;
}

/* ============================================
   META LABELS (the differentiator)
   ============================================ */
.meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--lime);
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 6rem 2rem 2rem;
    position: relative;
}

.hero-inner {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.hero-headline {
    font-family: var(--font-head);
    font-size: clamp(2.25rem, 5vw, 4.25rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--sand);
    margin-bottom: 1.5rem;
}

.accent { color: var(--lime); }

.hero-sub {
    font-size: 1.0625rem;
    color: var(--mist);
    max-width: 540px;
    margin-bottom: 2rem;
}

.hero-geo {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--mist);
    text-align: center;
    padding: 2rem;
    opacity: 0.5;
}

/* --- Text CTA --- */
.text-cta {
    font-family: var(--font-head);
    font-size: 1.125rem;
    font-weight: 500;
    padding: 0.875rem 2rem;
    border: 1px solid rgba(196, 245, 80, 0.3);
    background: rgba(196, 245, 80, 0.05);
    color: var(--lime);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.2s ease;
}

.text-cta:hover {
    gap: 0.75rem;
    background: rgba(196, 245, 80, 0.12);
    border-color: rgba(196, 245, 80, 0.5);
}

.text-cta:focus-visible {
    outline: 2px solid var(--lime);
    outline-offset: 4px;
}

/* ============================================
   PROOF (light section)
   ============================================ */
.proof {
    background: var(--paper);
    color: var(--ink);
    padding: 6rem 2rem;
}

.proof-inner {
    max-width: 900px;
    margin: 0 auto;
}

.proof .meta { color: var(--ink); opacity: 0.3; }

.metrics {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.metric {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem;
}

.metric-value {
    font-family: var(--font-head);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 700;
    color: var(--ink);
    line-height: 1;
}

.metric-prefix-dollar::before {
    content: '$';
}

.metric-suffix {
    font-family: var(--font-head);
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    font-weight: 500;
    color: var(--ink);
    opacity: 0.5;
    margin-left: 0.25rem;
}

.metric-label {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--mist);
    display: block;
    width: 100%;
    margin-top: 0.5rem;
    line-height: 1.5;
}

.proof-note {
    font-size: 0.9375rem;
    color: var(--mist);
    max-width: 520px;
    border-top: 1px solid rgba(0,0,0,0.1);
    padding-top: 1.5rem;
}

/* ============================================
   SERVICES (dark section)
   ============================================ */
.services {
    padding: 6rem 2rem;
}

.services-inner {
    max-width: 900px;
    margin: 0 auto;
}

.section-headline {
    font-family: var(--font-head);
    font-size: clamp(1.75rem, 3vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.service-card {
    padding: 2rem 0;
    border-top: 1px solid var(--slate);
}

.service-card h3 {
    font-family: var(--font-head);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0.75rem 0;
    color: var(--sand);
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--mist);
    max-width: 50ch;
    line-height: 1.7;
}

/* ============================================
   APPROACH (light section)
   ============================================ */
.approach {
    background: var(--paper);
    color: var(--ink);
    padding: 6rem 2rem;
}

.approach-inner {
    max-width: 900px;
    margin: 0 auto;
}

.approach .meta { color: var(--ink); opacity: 0.3; }
.approach .section-headline { color: var(--ink); }

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 1rem;
}

.step-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--mist);
    display: block;
    margin-bottom: 0.75rem;
}

.step h3 {
    font-family: var(--font-head);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 0.5rem;
}

.step p {
    font-size: 0.9375rem;
    color: var(--mist);
    max-width: 50ch;
    line-height: 1.7;
}

/* ============================================
   ABOUT (dark section)
   ============================================ */
.about {
    padding: 6rem 2rem;
}

.about-inner {
    max-width: 900px;
    margin: 0 auto;
}

.about-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 600px;
}

.about-body p {
    font-size: 1.0625rem;
    color: var(--mist);
    line-height: 1.7;
}

.about-geo {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--mist);
    margin-top: 2rem;
    opacity: 0.6;
}

/* ============================================
   CONTACT (light section)
   ============================================ */
.contact {
    background: var(--paper);
    color: var(--ink);
    padding: 6rem 2rem 4rem;
    text-align: center;
}

.contact-inner {
    max-width: 600px;
    margin: 0 auto;
}

.contact .meta { color: var(--ink); opacity: 0.3; }

.contact-headline {
    font-family: var(--font-head);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 1rem;
}

.contact-sub {
    font-size: 0.9375rem;
    color: var(--mist);
    margin-bottom: 2rem;
}

.email-cta {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    color: var(--ink);
    text-decoration: none;
    padding: 1rem 2.5rem;
    border: 2px solid var(--ink);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: background 0.3s ease, color 0.3s ease, gap 0.2s ease;
}

.email-cta:hover {
    background: var(--ink);
    color: var(--paper);
    gap: 1rem;
}

.email-cta:active {
    transform: scale(0.98);
}

.email-cta:focus-visible {
    outline: 2px solid var(--lime);
    outline-offset: 4px;
}

.gmail-note {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--mist);
    margin-top: 1rem;
    opacity: 0.6;
}

/* ============================================
   FAQ (dark section)
   ============================================ */
.faq {
    padding: 6rem 2rem;
}

.faq-inner {
    max-width: 900px;
    margin: 0 auto;
}

.faq-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 0.5rem;
}

.faq-item {
    background: var(--slate);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 0;
    transition: border-color 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(196, 245, 80, 0.15);
}

.faq-item[open] {
    border-color: rgba(196, 245, 80, 0.2);
}

.faq-item summary {
    font-family: var(--font-head);
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--sand);
    cursor: pointer;
    padding: 1.25rem 1.5rem;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: color 0.2s ease;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-family: var(--font-mono);
    font-size: 0.875rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--mist);
    border-radius: 50%;
    color: var(--mist);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.faq-item[open] summary::after {
    content: '−';
    color: var(--ink);
    background: var(--lime);
    border-color: var(--lime);
}

.faq-item summary:hover { color: var(--lime); }
.faq-item summary:hover::after { border-color: var(--lime); color: var(--lime); }

.faq-item summary:focus-visible {
    outline: 2px solid var(--lime);
    outline-offset: 2px;
}

.faq-item p {
    font-size: 0.9375rem;
    color: var(--mist);
    line-height: 1.7;
    max-width: 55ch;
    padding: 0 1.5rem 1.5rem;
}

@media (min-width: 768px) {
    .faq-list {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    padding: 2rem;
    border-top: 1px solid var(--slate);
}

.footer-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.875rem;
    letter-spacing: -0.01em;
}

.footer-geo {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--mist);
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--mist);
}

/* ============================================
   SVG WORDMARK TEXT
   ============================================ */
.wordmark-text {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.5px;
}

/* ============================================
   SCROLL REVEAL (scoped under .js to prevent FOIC)
   ============================================ */
.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (min-width: 768px) {
    .nav { padding: 1.25rem 3rem; }
    .hero { padding: 8rem 3rem 2rem; }
    .proof, .services, .approach, .about, .contact { padding-left: 3rem; padding-right: 3rem; }
    .metrics { grid-template-columns: repeat(3, 1fr); }
    .services-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}

@media (min-width: 1024px) {
    .nav { padding: 1.5rem 4rem; }
    .hero { padding: 10rem 4rem 2rem; }
    .proof, .services, .approach, .about, .contact { padding-left: 4rem; padding-right: 4rem; }
}

/* Mobile */
@media (max-width: 600px) {
    .nav { padding: 1rem 1rem; }
    .nav-links { gap: 0.75rem; }
    .nav-links a { font-size: 0.8125rem; }
    .wordmark { height: 22px; }
    .hero-headline { font-size: clamp(1.875rem, 7vw, 2.5rem); }
    .hero-headline br { display: none; }
    .section-headline br { display: none; }
}

/* Very small screens */
@media (max-width: 380px) {
    .nav { padding: 0.75rem 0.75rem; }
    .nav-links { gap: 0.5rem; }
    .nav-links a { font-size: 0.75rem; }
    .wordmark { height: 18px; }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .js .reveal {
        opacity: 1;
        transform: none;
    }
    html { scroll-behavior: auto; }
}