:root {
    --bg-base: #ffffff;
    --fg: #000000;
    --fg-muted: #151515;
    --fg-subtle: #2a2a2a;
    --accent: #000000;
    --accent-hover: #2a2a2a;
    --on-accent: #d4d4d4;
    --surface: rgba(255, 255, 255, 0.22);
    --surface-strong: rgba(255, 255, 255, 0.4);
    --border: rgba(0, 0, 0, 0.15);
    --max-width: 1100px;
    --max-width-narrow: 720px;
    --radius: 6px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    margin: 0;
    font-family: "DM Sans", -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--fg);
    background-color: var(--bg-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

p {
    margin: 0 0 1em;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container.narrow {
    max-width: var(--max-width-narrow);
}

/* ---------- Hero ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 140px 24px 80px;
    text-align: center;
    position: relative;
}

@media (max-width: 640px) {
    .hero {
        padding-top: 90px;
    }
}

/* hero overlay removed — page uses a single uniform background */

.hero-inner {
    position: relative;
    max-width: 760px;
    z-index: 1;
}

.hero-heading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    margin: 0 0 40px;
    flex-wrap: wrap;
}

.logo {
    width: clamp(76px, 12vw, 124px);
    height: auto;
    display: block;
    user-select: none;
    flex-shrink: 0;
    border-radius: 8px;
}

.wordmark {
    font-family: "Saira Stencil One", "DM Sans", sans-serif;
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    letter-spacing: 0.04em;
    margin: 0;
    line-height: 1.05;
    color: var(--fg);
}

.tagline {
    font-size: clamp(1.1rem, 2.2vw, 1.35rem);
    color: var(--fg);
    margin: 0 0 40px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.hero-lede {
    font-size: 1.05rem;
    color: var(--fg-muted);
    margin: 0 auto 56px;
    max-width: 620px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 150ms ease, transform 150ms ease;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--on-accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 3px;
}

.btn-submit {
    width: 100%;
    padding: 16px 28px;
    font-size: 1.05rem;
}

/* ---------- Sections ---------- */
.section {
    padding: 64px 24px;
}

.section-alt {
    /* background intentionally unified with page; rely on H2 + spacing for rhythm */
}

.section h2 {
    font-family: "Saira Stencil One", "DM Sans", sans-serif;
    font-size: clamp(1.75rem, 3.5vw, 2.4rem);
    letter-spacing: 0.04em;
    margin: 0 0 24px;
    color: var(--fg);
    position: relative;
    padding-bottom: 14px;
}

.section h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 56px;
    height: 3px;
    background-color: var(--accent);
}

.container.narrow h2 {
    text-align: left;
}

.muted {
    color: var(--fg-subtle);
    font-style: italic;
}

.emphasis {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--fg);
    border-left: 3px solid var(--accent);
    padding: 8px 0 8px 18px;
    margin: 24px 0;
}

/* ---------- Feature list ---------- */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 24px 0;
    display: grid;
    gap: 12px;
}

.feature-list li {
    padding: 14px 18px;
    background-color: transparent;
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- Vision grid ---------- */
.vision-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    margin: 32px 0;
}

.vision-card {
    background-color: #ffffff;
    border: 1px solid #1a1a1a;
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color 200ms ease, transform 200ms ease;
}

.vision-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.vision-card h3 {
    font-family: "DM Sans", sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--fg);
    letter-spacing: 0.02em;
}

.vision-card p {
    margin: 0;
    color: var(--fg-muted);
    font-size: 0.98rem;
}

.vision-footer {
    margin-top: 28px;
    color: var(--fg-muted);
}

/* ---------- Form ---------- */
.form-panel {
    margin-top: 28px;
    background-color: #ffffff;
    border: 1px solid #1a1a1a;
    border-radius: var(--radius);
    padding: 28px;
}

.form-tabs {
    display: flex;
    gap: 4px;
    margin: 0 0 24px;
    border-bottom: 1px solid var(--border);
}

.form-tab {
    background: transparent;
    border: none;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--fg-subtle);
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color 150ms ease, border-color 150ms ease;
}

.form-tab:hover {
    color: var(--fg);
}

.form-tab.is-active {
    color: var(--fg);
    border-bottom-color: var(--accent);
}

.form-tab:focus-visible {
    outline: 2px solid var(--fg);
    outline-offset: 3px;
    border-radius: 2px;
}

.tekarena-form {
    display: none;
}

.tekarena-form.is-active {
    display: block;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--fg-muted);
    letter-spacing: 0.01em;
}

.required {
    color: var(--fg);
}

.optional {
    color: var(--fg-subtle);
    font-weight: 400;
}

.field input,
.field textarea {
    padding: 12px 14px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    color: var(--fg);
    background-color: #f2f2f2;
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: background-color 150ms ease, outline-color 150ms ease;
}

.field textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

.field input::placeholder,
.field textarea::placeholder {
    color: var(--fg-subtle);
}

.field input:hover,
.field textarea:hover {
    background-color: #eaeaea;
}

.field input:focus,
.field textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
    background-color: #ffffff;
}

.form-status {
    margin: 16px 0 0;
    min-height: 1.4em;
    font-size: 0.95rem;
}

.form-status.success {
    color: #0a6b28;
}

.form-status.error {
    color: #a81919;
}

/* ---------- Footer ---------- */
.footer {
    padding: 40px 24px;
    background-color: transparent;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--fg-subtle);
    font-size: 0.9rem;
}

.footer p {
    margin: 4px 0;
}

.footer .copyright {
    color: var(--fg-muted);
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
    .form-row {
        grid-template-columns: 2fr 1fr;
    }

    .vision-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .vision-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .feature-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .section {
        padding: 44px 20px;
    }

    .form-panel {
        padding: 20px;
    }

    .form-tab {
        padding: 10px 10px;
        font-size: 0.9rem;
    }
}