/* =========================================================
   style.css — wizytówka: informatyzacja procesów biznesowych
   Styl: enterprise/tech, granatowo-biały, akcent turkusowy.
   Bez zewnętrznych fontów i bibliotek. Mobile-first.
   ========================================================= */

:root {
    --color-navy: #0f2540;
    --color-navy-dark: #0a1a2e;
    --color-white: #ffffff;
    --color-gray-bg: #f4f6f9;
    --color-gray-text: #4a5568;
    --color-border: #e2e6ec;
    --color-accent: #2b9bab;      /* stonowany turkusowy */
    --color-accent-dark: #1f7a88;

    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

    --max-width: 1140px;
    --radius: 6px;
    --transition: 0.2s ease-in-out;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-base);
    color: var(--color-navy);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    line-height: 1.25;
    font-weight: 700;
    margin: 0 0 16px;
}

h2 {
    font-size: 1.75rem;
    color: var(--color-navy);
}

h3 {
    font-size: 1.15rem;
}

p {
    margin: 0 0 16px;
    color: var(--color-gray-text);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover,
a:focus {
    color: var(--color-accent-dark);
    text-decoration: underline;
}

/* ---------- HEADER ---------- */

.site-header {
    background-color: var(--color-navy);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    color: var(--color-white);
    font-weight: 700;
    font-size: 1.1rem;
}

.logo:hover {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.85;
}

.main-nav {
    display: none;
    gap: 24px;
}

.main-nav a {
    color: var(--color-white);
    font-weight: 500;
}

.main-nav a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    display: block;
}

.main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-navy);
    padding: 16px 20px;
    gap: 16px;
}

/* ---------- HERO ---------- */

.hero {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    color: var(--color-white);
    padding: 64px 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-white);
    font-size: 2rem;
    margin-bottom: 8px;
}

.hero-tagline {
    font-size: 1.15rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 16px;
}

.hero-subtext {
    color: #cbd5e1;
    max-width: 640px;
    margin: 0 auto 28px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    transition: background-color var(--transition), color var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--color-accent-dark);
    color: var(--color-white);
    text-decoration: none;
}

/* ---------- SECTIONS ---------- */

.section {
    padding: 56px 0;
}

.section-intro {
    max-width: 640px;
    margin-bottom: 32px;
}

.about {
    background-color: var(--color-white);
}

.about-text {
    max-width: 720px;
}

.skills-list {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.skills-list li {
    background-color: var(--color-gray-bg);
    border-left: 3px solid var(--color-accent);
    padding: 10px 14px;
    border-radius: var(--radius);
    color: var(--color-navy);
    font-weight: 500;
    font-size: 0.95rem;
}

.projects {
    background-color: var(--color-gray-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.project-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}

.project-card:hover {
    box-shadow: 0 6px 18px rgba(15, 37, 64, 0.1);
    transform: translateY(-2px);
}

.project-card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: var(--color-gray-bg);
    overflow: hidden;
}

.project-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.project-card-body {
    padding: 20px;
}

.project-card-body h3 {
    color: var(--color-navy);
    margin-bottom: 8px;
}

.project-card-body p {
    margin: 0;
    font-size: 0.95rem;
}

.fallback-note {
    background-color: var(--color-white);
    border: 1px dashed var(--color-border);
    padding: 16px;
    border-radius: var(--radius);
}

.contact {
    background-color: var(--color-white);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-item {
    margin: 0;
    font-size: 1rem;
}

.contact-label {
    font-weight: 600;
    color: var(--color-navy);
    margin-right: 6px;
}

/* ---------- FOOTER ---------- */

.site-footer {
    background-color: var(--color-navy-dark);
    color: #cbd5e1;
    padding: 32px 0;
    font-size: 0.85rem;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-contact a {
    color: var(--color-accent);
}

.footer-rodo {
    color: #8a99ad;
    margin: 0;
    max-width: 700px;
}

.footer-copy {
    color: #8a99ad;
    margin: 0;
}

/* ---------- RESPONSIVE ---------- */

@media (min-width: 768px) {
    .main-nav {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

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

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}