/* --- Variables --- */
:root {
  --color-bg: rgba(15, 20, 25, 0.72);
  --color-bg-elevated: rgba(26, 35, 50, 0.78);
  --color-bg-card: rgba(30, 42, 58, 0.85);
  --color-text: #e6edf3;
  --color-text-muted: #8b9cb3;
  --color-accent: #0ea5e9;
  --color-accent-hover: #38bdf8;
  --color-border: #30363d;
  --font-sans: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --container-max: 1100px;
  --header-height: 80px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius: 8px;
  --radius-lg: 12px;
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --anim-duration: 0.6s;
  --anim-delay-step: 0.1s;
}

/* --- Reset & base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(180deg, rgba(15, 21, 25, 0.65) 0%, rgba(15, 21, 25, 0.55) 50%, rgba(15, 21, 25, 0.65) 100%),
    url("https://images.unsplash.com/photo-1555066931-4365d14bab8c?w=1920&q=80");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

@media (prefers-reduced-motion: reduce) {
  body::before {
    background-attachment: scroll;
  }
}

/* --- Animations --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.anim-hero {
  opacity: 0;
  transform: translateY(24px);
  animation: anim-fade-up 0.8s var(--ease-out) forwards;
  animation-delay: calc(var(--anim-order, 0) * 0.12s);
}

.anim-hero-graphic {
  opacity: 0;
  transform: translateX(24px);
  animation: anim-fade-right 0.9s var(--ease-out) 0.2s forwards;
}

@keyframes anim-fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes anim-fade-right {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.animate-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.cards .card.animate-in {
  transition-delay: calc(var(--anim-order, 0) * 0.1s);
}

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

a:hover {
  color: var(--color-accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 64px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
  display: block;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs) var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.nav-list {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  flex-direction: column;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md);
  gap: var(--space-sm);
}

.nav-list.is-open {
  display: flex;
}

@media (min-width: 768px) {
  .nav-list {
    position: static;
    display: flex;
    flex-direction: row;
    background: none;
    border: none;
    padding: 0;
    gap: var(--space-lg);
  }
}

.nav-list a {
  color: var(--color-text-muted);
  font-weight: 500;
  padding: var(--space-xs) 0;
  transition: color 0.25s var(--ease-out);
}

.nav-list a:hover {
  color: var(--color-accent);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  padding-bottom: var(--space-2xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(14, 165, 233, 0.18), transparent),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

.hero-content {
  min-width: 0;
}

.hero-graphic {
  display: none;
  min-width: 0;
}

@media (min-width: 768px) {
  .hero-graphic {
    display: block;
    max-width: 420px;
    justify-self: center;
  }
}

@media (min-width: 960px) {
  .hero-graphic {
    justify-self: end;
    max-width: 100%;
  }
}

.hero-illustration {
  width: 100%;
  height: auto;
  max-height: 280px;
}

.hero-arrow {
  animation: hero-dash 3s linear infinite;
}

.hero-dot {
  animation: hero-pulse 2s ease-in-out infinite;
}

@keyframes hero-dash {
  to { stroke-dashoffset: -20; }
}

@keyframes hero-pulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}

.hero-accent {
  color: var(--color-accent);
}

.hero-desc {
  max-width: 540px;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.scroll-arrow {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out), transform 0.2s var(--ease-out);
  cursor: pointer;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: 2px solid var(--color-accent);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: rgba(14, 165, 233, 0.12);
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* --- Sections --- */
.section {
  padding: var(--space-2xl) 0;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.02em;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 0 var(--space-xl);
}

.section-header-with-graphic {
  display: grid;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
  .section-header-with-graphic {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
  .section-header-with-graphic .section-lead {
    margin-bottom: 0;
  }
}

.section-graphic {
  max-width: 280px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .section-graphic {
    margin: 0;
    max-width: 200px;
  }
}

.section-graphic svg {
  width: 100%;
  height: auto;
  display: block;
}

.section-graphic-sync svg {
  max-height: 100px;
}

.section-graphic-code svg {
  max-height: 80px;
  opacity: 0.9;
}

/* --- Usługi (cards) --- */
.section-uslugi {
  background: var(--color-bg-elevated);
}

.cards {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color 0.3s var(--ease-out), transform 0.35s var(--ease-out-back), box-shadow 0.3s var(--ease-out);
}

.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.15);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.card-icon-svg {
  width: 48px;
  height: 48px;
  font-size: 0;
}

.card-icon-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm);
}

.card-text {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 0.95rem;
}

.comarch-block {
  margin-top: var(--space-2xl);
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.comarch-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}

.comarch-desc {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg);
  font-size: 1rem;
  line-height: 1.6;
}

.comarch-systems {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.comarch-systems li {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  padding-left: 1rem;
  position: relative;
}

.comarch-systems li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
}

.comarch-system {
  color: var(--color-accent);
  font-weight: 600;
}

/* --- O nas --- */
.section-about {
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 960px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-2xl);
  }
}

.about-content .section-title {
  margin-bottom: var(--space-md);
}

.about-lead {
  font-size: 1.125rem;
  margin: 0 0 var(--space-md);
}

.about-content p {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

.about-list {
  margin-top: var(--space-lg);
}

.about-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.about-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

.code-snippet {
  margin: 0;
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
}

.code-keyword {
  color: #38bdf8;
}

.code-snippet code {
  color: var(--color-text);
}

/* --- Technologie --- */
.section-tech {
  background: var(--color-bg-elevated);
}

/* --- Artykuły KSeF --- */
.section-ksef {
  background: var(--color-bg);
}

.article-list {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .article-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .article-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s var(--ease-out), transform 0.35s var(--ease-out-back), box-shadow 0.3s var(--ease-out);
}

.article-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.15);
}

.article-link {
  display: block;
  padding: var(--space-lg);
  color: inherit;
  text-decoration: none;
  height: 100%;
}

.article-link:hover {
  color: inherit;
}

.article-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.article-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm);
  line-height: 1.35;
  color: var(--color-text);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
  line-height: 1.55;
}

.article-more {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: color 0.25s var(--ease-out);
}

.article-card:hover .article-more {
  color: var(--color-accent-hover);
}

.article-card.animate-in {
  transition-delay: calc(var(--anim-order, 0) * 0.1s);
}

/* --- Karty z pełną treścią artykułu --- */
.article-list-full {
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.article-card-full {
  padding: var(--space-xl);
}

.article-card-full .article-label {
  margin-bottom: var(--space-sm);
}

.article-card-full .article-title {
  margin-bottom: var(--space-lg);
  font-size: 1.35rem;
  line-height: 1.3;
}

.article-card-content {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 68ch;
}

.article-card-content p {
  margin: 0 0 var(--space-md);
}

.article-card-content p:last-child {
  margin-bottom: 0;
}

.article-card-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin: var(--space-lg) 0 var(--space-sm);
}

.article-card-content h4:first-child {
  margin-top: 0;
}

.article-card-content ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.35rem;
}

.article-card-content li {
  margin-bottom: var(--space-xs);
}

.article-card-content li::marker {
  color: var(--color-accent);
}

.article-card-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.35em;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-accent);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tech-tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: border-color 0.25s var(--ease-out), color 0.25s var(--ease-out), transform 0.2s var(--ease-out);
}

.tech-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: scale(1.05);
}

/* --- Kontakt --- */
.section-contact {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-box {
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-box p {
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
}

.contact-box p:last-child {
  margin-bottom: 0;
}

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

.contact-box a:hover {
  text-decoration: underline;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

.form-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.8;
}

.form-input:hover,
.form-input:focus {
  border-color: var(--color-accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  margin-top: var(--space-xs);
  align-self: flex-start;
}

.form-note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.form-note.success {
  color: var(--color-accent);
}

.form-note.error {
  color: #f87171;
}

/* --- Strona artykułu --- */
.article-page .article-main {
  padding-top: calc(var(--header-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
}

.article-card-wrap {
  background: #1a2332;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 720px;
  margin: 0 auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

@media (min-width: 768px) {
  .article-card-wrap {
    padding: var(--space-2xl);
  }
}

.article-back {
  display: inline-block;
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.25s var(--ease-out);
}

.article-back:hover {
  color: var(--color-accent-hover);
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: var(--space-xl);
}

.article-meta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.article-heading {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 var(--space-xs);
  color: var(--color-text);
}

.article-date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

.article-body p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.article-body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: var(--space-xl) 0 var(--space-sm);
  color: var(--color-text);
}

.article-body ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.5rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.article-body li {
  margin-bottom: var(--space-xs);
}

.article-body li::marker {
  color: var(--color-accent);
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-accent);
}

/* --- Footer --- */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.footer-text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

.footer-credit {
  margin: var(--space-xs) 0 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  opacity: 0.85;
}

.footer-credit a {
  color: var(--color-text-muted);
}

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