/* ==========================================================================
   CleverSoft — cleversoft.cz
   CSS Design System
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;700&display=swap');

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-primary:    #04318c;
  --color-dark:       #022873;
  --color-darkest:    #021f59;
  --color-grey:       #dedde4;
  --color-accent:     #F36F21;
  --color-white:      #ffffff;
  --color-text:       #1a1a2e;
  --color-text-light: #555577;

  /* Typography */
  --font-primary:   'Poppins', Verdana, sans-serif;
  --font-weight-light:  300;
  --font-weight-regular: 400;
  --font-weight-bold:   700;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  8rem;

  /* Layout */
  --container-max: 1200px;
  --border-radius: 8px;

  /* Transitions */
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-regular);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }

p {
  margin-bottom: var(--space-sm);
}

.text-light {
  font-weight: var(--font-weight-light);
}

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

.text-white {
  color: var(--color-white);
}

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

.section {
  padding: var(--space-lg) 0;
}

.section--blue {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.section--blue h1,
.section--blue h2,
.section--blue h3 {
  color: var(--color-white);
}

.section--dark {
  background-color: var(--color-darkest);
  color: var(--color-white);
}

.section--grey {
  background-color: var(--color-grey);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  font-size: 1rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

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

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

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-white);
  border: 2px solid transparent;
  transition: all 0.3s ease;
}

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

.btn--outline {
  background-color: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

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

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
}

.nav__logo img {
  height: 40px;
}

.nav__links {
  display: flex;
  list-style: none;
  gap: var(--space-md);
}

.nav__links a {
  font-weight: var(--font-weight-regular);
  color: var(--color-white);
}

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

/* --- Hero --- */
.hero {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-xl) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.hero .subtitle {
  font-size: 1.25rem;
  font-weight: var(--font-weight-light);
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  box-shadow: 0 4px 20px rgba(4, 49, 140, 0.08);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(4, 49, 140, 0.15);
}

/* --- Grid --- */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* --- Footer --- */
.footer {
  background-color: var(--color-darkest);
  color: var(--color-grey);
  padding: var(--space-lg) 0 var(--space-md);
}

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

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

/* --- Dropdown & Accordion Components --- */
.rotate-icon {
  transition: transform 0.2s ease;
}

.rotate-icon.open {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-body.open {
  max-height: 400px;
}

/* --- Focus Styles --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .nav__links { display: none; }

  .section { padding: var(--space-md) 0; }
}