/* Design System for GasteizBus */
:root {
    --primary-color: #1a3668; /* Corporate Blue */
    --secondary-color: #3498db; /* Bright Blue */
    --accent-color: #666666; /* GB Gray */
    --text-color: #333333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --transition: all 0.3s ease;
    --container-width: 1200px;
}

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

body {
    font-family: 'Open Sans', 'Raleway', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-transform: uppercase;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

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

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

/* Sections */
section {
    padding: 80px 0;
    position: relative;
}

.section-alt {
    background-color: var(--light-bg);
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-image: linear-gradient(rgba(26, 54, 104, 0.8), rgba(26, 54, 104, 0.8)), url('/images/SLIDER-HOME-GASTEIZBUS_Slider.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero h1, .hero h2 { color: var(--white); }

.hero-content {
    animation: fadeInUp 1s ease;
}

/* Dividers */
.divider-svg {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    line-height: 0;
    z-index: 10;
}

.divider-svg svg {
    display: block;
    width: 100%;
    height: 100px;
}

.divider-svg path {
    fill: var(--white);
}

/* Grid System */
.grid {
    display: grid;
    gap: 30px;
}

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

@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    h1 { font-size: 2rem; }
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Navbar */
.navbar {
    background-color: var(--white);
    height: 100px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo img {
    height: 80px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

/* Mobile Nav */
.burger {
    display: none;
    cursor: pointer;
}

@media (max-width: 992px) {
    .nav-links {
        display: none; /* Transition to mobile menu later */
    }
    .burger { display: block; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}