:root {
  /* Osnovne boje (Light Mode - Čišći i bolji kontrast) */
  --bg-color: #ffffff;         /* Čista bijela umjesto sivo-plavkaste */
  --text-color: #1a202c;
  --nav-bg: rgba(255, 255, 255, 0.1); /* Jaka prozirnost */
  --primary-blue: #003b95;     /* Punija tamno plava */
  --accent-color: #0077b6;
  --card-bg: #fdfdfd;          /* Jako blizu bijele za karte */
  --shadow-color: rgba(0, 59, 149, 0.08); /* Suptilnija sjena */
  --modal-bg: rgba(255, 255, 255, 0.85);
  
  /* Font & Razmaci */
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  /* Tamna tema (Sportski vizionarski stil) */
  --bg-color: #0b132b; 
  --text-color: #e2e8f0;
  --nav-bg: rgba(11, 19, 43, 0.2); /* Jaka prozirnost za tamni mode */
  --primary-blue: #4cc9f0; /* Svjetliji naglasak plave za tamni mode */
  --accent-color: #F8FAFF;
  --card-bg: #1c2541;
  --shadow-color: rgba(0, 0, 0, 0.6);
  --modal-bg: rgba(28, 37, 65, 0.9);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
  overflow-x: hidden;
}

/* Navigacija & Blur na Skrolu */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: transparent; /* Početno skroz prozirna */
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(15px); /* Jaci skrol Blur efekt */
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--shadow-color);
  box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-blue);
  text-decoration: none;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  padding: 0.5rem 1rem;
  transition: var(--transition);
  border-radius: 5px;
}

.nav-link:hover, .nav-link.active {
  background-color: var(--primary-blue);
  color: var(--bg-color);
}

.menu-toggle {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle .bar {
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  transition: var(--transition);
}

.theme-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-color);
  transition: transform 0.2s;
}

.theme-btn:active {
  transform: rotate(30deg);
}

/* Hero sekcija (Slika sport/terase kao background) */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 1rem;
  background: linear-gradient(rgba(11, 19, 43, 0.7), rgba(11, 19, 43, 0.8)),
              url('https://images.unsplash.com/photo-1517457373958-b7bdd4587205') center/cover no-repeat;
  color: #fff;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-btn {
  background-color: #3E92CC;
  color: #fff;
  border: none;
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(62, 146, 204, 0.4);
}

.cta-btn:hover {
  background-color: #0A2463;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(62, 146, 204, 0.6);
}

/* Proizvodi sekcija */
.products {
  padding: 5rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--primary-blue);
  margin-bottom: 0.5rem;
}

.cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--card-bg);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 30px var(--shadow-color);
  transition: var(--transition);
  cursor: pointer;
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px var(--shadow-color);
}

.card:hover img {
  transform: scale(1.05);
}

.card-content {
  padding: 1.5rem;
}

.card-content h3 {
  color: var(--primary-blue);
  margin-bottom: 0.5rem;
}

/* Modal Popup (Pop-up prozor za akcije) */
.modal {
  display: none; 
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
}

/* --- On Scroll Animacije --- */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}
/* -------------------------- */

.modal-content {
  background-color: var(--modal-bg);
  padding: 2.5rem;
  border-radius: 15px;
  max-width: 500px;
  width: 90%;
  position: relative;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  animation: modalOpen 0.5s ease-out;
}

@keyframes modalOpen {
  from { opacity: 0; transform: translateY(-50px); }
  to { opacity: 1; transform: translateY(0); }
}

.close-btn {
  position: absolute;
  top: 15px;
  right: 20px;
  color: var(--text-color);
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.3s;
}

.close-btn:hover {
  color: red;
}

.promo-list {
  text-align: left;
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.promo-list li {
  margin-bottom: 0.8rem;
  color: var(--text-color);
}

.modal-cta {
  display: inline-block;
  background-color: var(--primary-blue);
  color: #fff;
  padding: 0.8rem 2rem;
  text-decoration: none;
  border-radius: 30px;
  margin-top: 1rem;
  transition: background 0.3s;
}

.modal-cta:hover {
  background-color: #3E92CC;
  color: #fff;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  background-color: var(--card-bg);
  border-top: 1px solid var(--shadow-color);
}

/* Mobilna Odzivnost (Media Queries) */
@media screen and (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: absolute;
    top: 70px;
    left: -100%;
    flex-direction: column;
    width: 100%;
    background-color: var(--card-bg);
    padding: 2rem 0;
    transition: 0.3s;
    box-shadow: 0 10px 15px var(--shadow-color);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
}