:root {
    --paper: #faf9f6;
    --paper-alt: #f1efe8;
    --ink: #15161a;
    --ink-muted: #6b6d76;
    --line: #d9d6cc;
    --accent-blue: #2451ff;
    --accent-red: #ff4433;
    --white: #ffffff;
    --display: 'Space Grotesk', sans-serif;
    --mono: 'Space Mono', monospace;
    --sans: 'Inter', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--sans);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.7;
    position: relative;
}

a { color: inherit; }
::selection { background: var(--accent-blue); color: var(--white); }

/* Znaczniki rejestracyjne w rogach ekranu - motyw kreślarski */
.reg-mark {
    position: fixed;
    font-family: var(--mono);
    color: var(--line);
    font-size: 1rem;
    z-index: 500;
    pointer-events: none;
}
.reg-tl { top: 14px; left: 14px; }
.reg-tr { top: 14px; right: 14px; }
.reg-bl { bottom: 14px; left: 14px; }
.reg-br { bottom: 14px; right: 14px; }

.doc-label {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: var(--ink-muted);
    margin-bottom: 18px;
}
.doc-label.center { text-align: center; }

/* Nav */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 22px 56px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(250, 249, 246, 0.82);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.logo {
    font-family: var(--display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}
.logo-dot { color: var(--accent-red); }
.nav-links a {
    font-family: var(--mono);
    text-decoration: none;
    margin-left: 34px;
    font-size: 0.78rem;
    color: var(--ink-muted);
    transition: color 0.25s;
}
.nav-links a:hover { color: var(--accent-blue); }

/* Header */
header {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 150px 20px 0;
}
h1 {
    font-family: var(--display);
    font-size: 3.6rem;
    font-weight: 700;
    letter-spacing: -1.5px;
    line-height: 1.12;
    margin-bottom: 26px;
    animation: fadeInUp 0.8s ease-out both;
}
.underline-accent {
    position: relative;
    display: inline-block;
}
.underline-accent::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 4px;
    height: 10px;
    background: rgba(36, 81, 255, 0.16);
    z-index: -1;
}
.lede {
    font-size: 1.08rem;
    color: var(--ink-muted);
    max-width: 560px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.15s both;
}
.header-cta { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; animation: fadeInUp 0.8s ease-out 0.3s both; }
.btn-primary, .btn-ghost {
    font-family: var(--display);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 15px 28px;
    border-radius: 999px;
    text-decoration: none;
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s, color 0.25s;
    display: inline-block;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(21,22,26,0.2); background: var(--accent-blue); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.btn-ghost:hover { border-color: var(--accent-blue); color: var(--accent-blue); transform: translateY(-3px); }

/* Adnotacje pomiarowe wskazujące na statystyki - element sygnaturowy */
.annotation {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-muted);
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
}
.annotation b { color: var(--ink); }
.ann-line { width: 46px; height: 1px; background: var(--accent-blue); position: relative; }
.ann-line::before { content: '●'; position: absolute; left: -4px; top: -5px; font-size: 0.5rem; color: var(--accent-blue); }
.ann-1 { top: 22%; left: 6%; animation-delay: 0.9s; }
.ann-2 { top: 34%; right: 6%; flex-direction: row-reverse; animation-delay: 1.15s; }
.ann-3 { top: 62%; left: 4%; animation-delay: 1.4s; }
@media (max-width: 1000px) { .annotation { display: none; } }

/* Pasek technologii jak taśma miernicza */
.ruler {
    width: 100%;
    margin-top: 90px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--paper-alt);
    overflow: hidden;
    padding: 13px 0;
}
.ruler-track {
    display: flex;
    gap: 28px;
    width: max-content;
    animation: rulerScroll 26s linear infinite;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    color: var(--ink-muted);
    white-space: nowrap;
}
@keyframes rulerScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* Sekcje */
section { padding: 120px 20px; }
.bg-alt { background: var(--paper-alt); }
.container {
    max-width: 1100px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.container.visible { opacity: 1; transform: translateY(0); }
.section-title {
    text-align: center;
    font-family: var(--display);
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 60px;
}
.contact-lead { text-align: center; margin-bottom: 40px; color: var(--ink-muted); }

/* Karty usług z narożnikami kreślarskimi */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}
.card, .contact-wrapper {
    position: relative;
    background: var(--white);
    padding: 34px 28px;
    border: 1px solid var(--line);
    text-align: left;
    transition: box-shadow 0.3s, transform 0.3s;
}
.card:hover { box-shadow: 0 18px 40px rgba(21,22,26,0.08); transform: translateY(-4px); }
.card-corner {
    position: absolute;
    width: 12px;
    height: 12px;
    opacity: 0;
    transition: opacity 0.3s;
}
.card:hover .card-corner, .contact-wrapper .card-corner { opacity: 1; }
.card-corner.tl { top: -1px; left: -1px; border-top: 2px solid var(--accent-blue); border-left: 2px solid var(--accent-blue); }
.card-corner.tr { top: -1px; right: -1px; border-top: 2px solid var(--accent-blue); border-right: 2px solid var(--accent-blue); }
.card-corner.bl { bottom: -1px; left: -1px; border-bottom: 2px solid var(--accent-blue); border-left: 2px solid var(--accent-blue); }
.card-corner.br { bottom: -1px; right: -1px; border-bottom: 2px solid var(--accent-blue); border-right: 2px solid var(--accent-blue); }

.card-tag {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--accent-blue);
    display: block;
    margin-bottom: 16px;
}
.card h3 { font-family: var(--display); font-size: 1.2rem; margin-bottom: 12px; font-weight: 600; }
.card p { color: var(--ink-muted); font-size: 0.92rem; }

/* Tabela specyfikacji */
.spec-table {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    border-collapse: collapse;
    font-family: var(--mono);
}
.spec-table tr { border-bottom: 1px solid var(--line); }
.spec-table tr:first-child { border-top: 1px solid var(--line); }
.spec-table td {
    padding: 22px 8px;
    font-size: 0.95rem;
}
.spec-table td:first-child { color: var(--ink-muted); }
.spec-value {
    text-align: right;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--accent-blue);
}

/* Formularz kontaktowy */
.contact-wrapper { max-width: 600px; margin: 0 auto; padding: 0; }
#contact-form { padding: 40px 36px; }

.accent-text { color: var(--accent-blue); }

.input-group { position: relative; margin-bottom: 24px; }
.input-group label {
    display: block;
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--ink-muted);
    margin-bottom: 8px;
}
.input-group input,
.input-group textarea {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid var(--line);
    border-radius: 4px;
    outline: none;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 0.95rem;
    transition: border-color 0.25s, box-shadow 0.25s;
}
.input-group textarea { resize: vertical; min-height: 110px; }
.input-group input::placeholder,
.input-group textarea::placeholder { color: #a8a8a2; }
.input-group input:focus,
.input-group textarea:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(36,81,255,0.12); }

.input-group.invalid input,
.input-group.invalid textarea { border-color: var(--accent-red); }
.error-msg {
    display: none;
    color: var(--accent-red);
    font-family: var(--mono);
    font-size: 0.76rem;
    margin-top: 6px;
}
.input-group.invalid .error-msg { display: block; }

.captcha-group input { width: 140px; }

.hp-field { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; overflow: hidden; }

button[type="submit"] {
    width: 100%;
    padding: 15px;
    background: var(--ink);
    color: var(--paper);
    border: none;
    border-radius: 4px;
    font-family: var(--display);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
button[type="submit"]:hover { background: var(--accent-blue); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(36,81,255,0.22); }
button[type="submit"]:disabled { background: var(--line); color: var(--ink-muted); cursor: not-allowed; transform: none; box-shadow: none; }

.form-status {
    margin-top: 16px;
    text-align: center;
    font-family: var(--mono);
    font-size: 0.84rem;
    min-height: 1.2em;
}
.form-status.success { color: var(--accent-blue); }
.form-status.error { color: var(--accent-red); }

/* Footer */
footer {
    text-align: center;
    padding: 34px;
    background: var(--paper-alt);
    border-top: 1px solid var(--line);
    color: var(--ink-muted);
    font-family: var(--mono);
    font-size: 0.8rem;
}
.footer-brand { color: var(--ink); transition: color 0.25s; }
.footer-brand:hover { color: var(--accent-blue); }

/* Back to top */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background: var(--ink);
    color: var(--paper);
    border: none;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background 0.3s;
}
#back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top:hover { background: var(--accent-blue); transform: translateY(-4px); }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { to { opacity: 1; } }

@media (max-width: 768px) {
    nav { padding: 18px 20px; }
    .nav-links a { margin-left: 18px; font-size: 0.7rem; }
    header { padding: 130px 16px 0; }
    h1 { font-size: 2.3rem; }
    section { padding: 80px 16px; }
    #contact-form { padding: 28px 22px; }
    .reg-mark { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}