:root {
    --white: #ffffff;
    --surface: #f8fafd;
    --border: #e3e7ed;
    --border-hover: #c2d7fa;
    --ink: #1f1f1f;
    --slate: #5f6368;
    --blue: #1a73e8;
    --blue-hover: #1557b0;
    --blue-soft: #e8f0fe;
    --green: #1e8e3e;
    --green-soft: #e6f4ea;
    --yellow-text: #b06000;
    --yellow-soft: #fef7e0;
    --red: #d93025;
    --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--white);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Google 4-Color Bar */
.google-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    z-index: 200;
}
.google-bar .b { background: #4285f4; }
.google-bar .r { background: #ea4335; }
.google-bar .y { background: #fbbc05; }
.google-bar .g { background: #34a853; }

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    position: sticky;
    top: 3px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-bar {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--ink);
}

.brand-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
}

.brand-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.brand-title strong {
    color: var(--blue);
    font-weight: 800;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--slate);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s ease;
}

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

.nav-cta {
    display: flex;
    gap: 0.6rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.5rem;
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.18s ease;
}

.btn-sm {
    padding: 0.48rem 1.05rem;
    font-size: 0.84rem;
}

.btn-primary {
    background: var(--blue);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--blue-hover);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.22);
}

.btn-secondary {
    background: var(--blue-soft);
    color: var(--blue);
}

.btn-secondary:hover {
    background: #d2e3fc;
}

.btn-outline {
    background: var(--white);
    color: var(--ink);
    border-color: var(--border);
}

.btn-outline:hover {
    border-color: var(--blue);
    color: var(--blue);
}

.full-width {
    width: 100%;
}

/* Hero */
.hero {
    padding: 6.5rem 0 5rem;
    text-align: center;
}

.hero-inner {
    max-width: 820px;
}

.eyebrow-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 0.38rem 0.95rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--slate);
    margin-bottom: 1.75rem;
}

.eyebrow-pill .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
}

h1 {
    font-family: var(--font-display);
    font-size: 3.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 1.25rem;
}

h1 span {
    color: var(--blue);
}

.hero-sub {
    font-size: 1.18rem;
    color: var(--slate);
    max-width: 660px;
    margin: 0 auto 2.25rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 0.85rem;
    margin-bottom: 4rem;
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding-top: 2.25rem;
    border-top: 1px solid var(--border);
}

.metric strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--ink);
}

.metric span {
    font-size: 0.8rem;
    color: var(--slate);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.bg-light {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header.compact {
    margin-bottom: 1.75rem;
}

.kicker {
    display: block;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--blue);
    margin-bottom: 0.4rem;
}

h2 {
    font-family: var(--font-display);
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Grids & Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 24px rgba(26, 115, 232, 0.06);
}

.card-num {
    display: inline-block;
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.22rem 0.65rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.card-num.blue { background: var(--blue-soft); color: var(--blue); }
.card-num.green { background: var(--green-soft); color: var(--green); }
.card-num.yellow { background: var(--yellow-soft); color: var(--yellow-text); }

.card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 0.6rem;
}

.card p {
    font-size: 0.94rem;
    color: var(--slate);
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1.25rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--border);
}

.chip-row span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--slate);
    background: var(--surface);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
}

.minimal-card {
    background: var(--surface);
}

/* Blueprints & Reference Strip */
.resource-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.25rem;
}

.link-arrow {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--blue);
    text-decoration: none;
}

.link-arrow:hover {
    text-decoration: underline;
}

.ref-strip {
    margin-top: 2rem;
    padding: 1.1rem 1.5rem;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1.15rem;
    font-size: 0.85rem;
}

.ref-label {
    font-weight: 600;
    color: var(--ink);
}

.ref-strip a {
    color: var(--slate);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease;
}

.ref-strip a:hover {
    color: var(--blue);
}

/* Founder Card */
.founder-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.founder-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.founder-avatar {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    object-fit: cover;
    border: 1px solid var(--border);
}

.founder-left h2 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.founder-right {
    display: flex;
    gap: 0.65rem;
    flex-shrink: 0;
}

/* Registration Card */
.reg-wrapper {
    max-width: 680px;
    margin: 0 auto;
    padding: 2.5rem;
}

.tab-switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--surface);
    padding: 0.3rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    margin-bottom: 1.75rem;
}

.tab-btn {
    border: none;
    background: transparent;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--slate);
    cursor: pointer;
    transition: all 0.15s ease;
}

.tab-btn.active {
    background: var(--white);
    color: var(--blue);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.minimal-form {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.9rem;
}

.minimal-form input,
.minimal-form select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    color: var(--ink);
    background: var(--white);
}

.minimal-form input:focus,
.minimal-form select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px var(--blue-soft);
}

.form-actions-dual {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 0.75rem;
}

.status-msg {
    font-size: 0.86rem;
    text-align: center;
    min-height: 1.2rem;
}
.status-msg.error { color: var(--red); }
.status-msg.success { color: var(--green); }

.hidden {
    display: none !important;
}

/* Footer */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    font-size: 0.86rem;
    color: var(--slate);
}

.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--slate);
    text-decoration: none;
}

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

/* Responsive */
@media (max-width: 860px) {
    h1 { font-size: 2.5rem; }
    .nav-menu { display: none; }
    .grid-3, .grid-2, .form-row, .form-actions-dual { grid-template-columns: 1fr; }
    .metrics-row { grid-template-columns: repeat(2, 1fr); }
    .founder-card, .founder-left { flex-direction: column; text-align: center; }
    .tab-switch { grid-template-columns: 1fr; border-radius: 14px; }
}