/* ==========================================================================
   Topochron — marketing web (www/)
   Barva je jediná proměnná --color-primary — změň ji a celý web se přebarví.
   ========================================================================== */

:root {
    /* --- placeholder barva, klidně nahraď --- */
    --color-primary:      #1f6f54;
    --color-primary-dark: #164f3c;
    --color-primary-soft: #e7f2ee;

    --color-ink:    #16211c;
    --color-muted:  #55645d;
    --color-bg:     #f7f6f1;
    --color-bg-alt: #ffffff;
    --color-border: #e3e0d6;

    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;

    --wrap-width: 1120px;
    --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-ink);
    background: var(--color-bg);
}

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

h1, h2, h3 {
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    line-height: 1.15;
}

.kicker {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}

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

/* --- buttons --- */

.btn {
    display: inline-block;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: 999px;
    padding: 12px 26px;
    font-size: 0.9rem;
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    border: 2px solid transparent;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.btn-ghost {
    border-color: var(--color-ink);
    color: var(--color-ink);
}
.btn-ghost:hover { background: var(--color-ink); color: #fff; }

.btn-sm { padding: 8px 18px; font-size: 0.8rem; }
.btn-lg { padding: 16px 34px; font-size: 1rem; }

/* --- header --- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(247, 246, 241, 0.9);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--color-border);
}
.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 76px;
}
.logo {
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 1.3rem;
}
.site-nav {
    display: flex;
    gap: 32px;
    margin-left: auto;
    margin-right: 32px;
    font-weight: 600;
    font-size: 0.95rem;
}
.site-nav a:hover { color: var(--color-primary); }

/* --- hero --- */

.hero {
    padding: 120px 0 100px;
    text-align: center;
    background:
        radial-gradient(ellipse at top, var(--color-primary-soft) 0%, transparent 60%);
}
.hero h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    max-width: 900px;
    margin: 0 auto 26px;
}
.hero-subtitle {
    max-width: 620px;
    margin: 0 auto 44px;
    font-size: 1.15rem;
    color: var(--color-muted);
}
.hero-checklist {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 22px;
    max-width: 640px;
    margin: 0 auto 36px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-ink);
}

.hero-actions {
    display: flex;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-visual {
    max-width: 960px;
    margin: 56px auto 0;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background:
        linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-bg-alt) 100%);
    border: 1px solid var(--color-border);
}
.hero-visual img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* --- jedna databáze, mnoho pohledů --- */

.views {
    padding: 100px 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}
.views h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    max-width: 720px;
    margin: 0 auto 16px;
}
.views-intro {
    max-width: 620px;
    margin: 0 auto 56px;
    color: var(--color-muted);
    font-size: 1.05rem;
}
.views-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: left;
}
.views-card {
    padding: 24px 4px;
    border-top: 3px solid var(--color-primary);
}
.views-card h3 {
    font-size: 0.98rem;
    margin-bottom: 8px;
}
.views-card p {
    color: var(--color-muted);
    font-size: 0.92rem;
}

/* --- features --- */

.features { padding: 100px 0; }
.features .kicker, .features h2 { text-align: center; }
.features h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    max-width: 720px;
    margin: 0 auto 64px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.feature-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
}
.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-bottom: 18px;
}
.feature-card h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
}
.feature-card p {
    color: var(--color-muted);
    font-size: 0.98rem;
}

/* --- how it works --- */

.how {
    padding: 100px 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.how .kicker, .how h2 { text-align: center; }
.how h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    max-width: 720px;
    margin: 0 auto 64px;
}

.steps {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    counter-reset: step;
}
.steps li { position: relative; padding-top: 8px; }
.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 800;
    margin-bottom: 18px;
}
.steps h3 {
    font-size: 0.95rem;
    margin-bottom: 8px;
}
.steps p {
    color: var(--color-muted);
    font-size: 0.92rem;
}

.how-note {
    text-align: center;
    margin-top: 56px;
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* --- faq --- */

.faq { padding: 100px 0; }
.faq .kicker, .faq h2 { text-align: center; }
.faq h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    max-width: 720px;
    margin: 0 auto 48px;
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 24px;
}
.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+';
    float: right;
    color: var(--color-primary);
    font-weight: 800;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
    margin-top: 14px;
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* --- audience --- */

.audience { padding: 100px 0; text-align: center; }
.audience h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    max-width: 720px;
    margin: 0 auto 48px;
}
.audience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: left;
}
.audience-card {
    padding: 20px 22px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.audience-card h3 {
    font-size: 0.95rem;
    margin-bottom: 6px;
}
.audience-card p {
    color: var(--color-muted);
    font-size: 0.9rem;
}

/* --- cta --- */

.cta {
    padding: 110px 0;
    text-align: center;
}
.cta h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    margin-bottom: 16px;
}
.cta p {
    color: var(--color-muted);
    margin-bottom: 36px;
    font-size: 1.05rem;
}

/* --- contact --- */

.contact {
    padding: 100px 0 110px;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    text-align: center;
}
.contact .kicker, .contact h2 { text-align: center; }
.contact h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    margin-bottom: 14px;
}
.contact-subtitle {
    color: var(--color-muted);
    margin-bottom: 40px;
}

.contact-form {
    max-width: 480px;
    margin: 0 auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.form-row label {
    display: block;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}
.form-row input,
.form-row textarea {
    width: 100%;
    font: inherit;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
    color: var(--color-ink);
    resize: vertical;
}
.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}
.contact-form .btn { align-self: center; margin-top: 6px; }

.form-row-hidden {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-alert {
    max-width: 480px;
    margin: 0 auto 28px;
    padding: 14px 18px;
    border-radius: 8px;
    font-size: 0.95rem;
}
.form-alert-success {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
}
.form-alert-error {
    background: #fbe9e7;
    color: #8a2e1f;
}

/* --- footer --- */

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
}
.site-footer .wrap {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* --- responsive --- */

@media (max-width: 860px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .views-grid { grid-template-columns: repeat(2, 1fr); }
    .audience-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .site-nav { display: none; }
}

@media (max-width: 540px) {
    .feature-grid { grid-template-columns: 1fr; }
    .views-grid { grid-template-columns: 1fr; }
    .audience-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .hero { padding: 90px 0 70px; }
    .hero-checklist { font-size: 0.85rem; gap: 8px 16px; }
}