/* 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); }
}

/* Custom Validation Styles for Alta Form */
input.is-invalid, select.is-invalid {
    border-color: #dc3545 !important;
    background-color: #fdf2f2 !important;
}

input.is-invalid:focus, select.is-invalid:focus {
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
}

#signature-container.is-invalid {
    border: 2px solid #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.1) !important;
}

#lopd-container.is-invalid {
    border: 1px solid #dc3545 !important;
    background-color: #fdf2f2 !important;
}

.form-error-alert {
    padding: 15px;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-left: 5px solid #dc3545;
    color: #721c24;
    border-radius: 6px;
    margin-bottom: 25px;
    font-size: 0.95rem;
    font-weight: 500;
    display: none;
}

/* Alta Form and Contract Document Styles */
.alta-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
}

@media (max-width: 992px) {
    .alta-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* Folio/Paper Contract Container */
.contract-document {
    background: #ffffff;
    border: 1px solid #c8d3e2;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    padding: 30px 25px;
    margin: 25px 0;
    border-radius: 4px;
    font-family: 'Open Sans', sans-serif;
    color: #333333;
    font-size: 0.88rem;
    line-height: 1.45;
    position: relative;
    border-top: 5px solid var(--primary-color);
}

.contract-document-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 12px;
    margin-bottom: 20px;
}

.contract-document-title {
    font-family: 'Raleway', sans-serif;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.05rem;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contract-document-subtitle {
    font-size: 0.72rem;
    color: #718096;
    font-weight: 600;
    text-align: right;
    text-transform: uppercase;
}

.contract-section-title {
    background: #ebf4ff;
    color: #2b6cb0;
    padding: 6px 10px;
    font-size: 0.82rem;
    font-weight: 700;
    margin-top: 20px;
    margin-bottom: 10px;
    text-transform: uppercase;
    border-left: 3px solid #3182ce;
}

.contract-field-grid {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 6px 12px;
    margin-bottom: 15px;
    padding: 0 5px;
}

@media (max-width: 576px) {
    .contract-field-grid {
        grid-template-columns: 1fr;
        gap: 3px;
    }
}

.contract-field-label {
    color: #4a5568;
    font-weight: 600;
}

.contract-field-value {
    color: #1a202c;
    font-weight: 700;
    word-break: break-all;
}

.contract-clause-title {
    font-weight: 700;
    font-size: 0.78rem;
    margin-top: 10px;
    margin-bottom: 3px;
    color: #2d3748;
    text-transform: uppercase;
}

.contract-clause-text {
    font-size: 0.72rem;
    color: #4a5568;
    text-align: justify;
    margin-bottom: 10px;
    line-height: 1.4;
}

.contract-signature-block {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    margin-top: 15px;
    gap: 20px;
}

@media (max-width: 768px) {
    .contract-signature-block {
        flex-direction: column;
    }
}

.contract-signature-text {
    font-size: 0.72rem;
    color: #4a5568;
    text-align: justify;
    line-height: 1.4;
    flex: 1;
}

.contract-signature-pad-wrapper {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

@media (max-width: 768px) {
    .contract-signature-pad-wrapper {
        width: 100%;
    }
}

.contract-canvas-container {
    border: 1.5px dashed #cbd5e0;
    background: #fcfcfc;
    position: relative;
    border-radius: 4px;
    height: 150px;
    transition: var(--transition);
}

.contract-canvas-container.is-invalid {
    border-color: #dc3545 !important;
    background-color: #fff5f5 !important;
}

.contract-canvas-container canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.contract-sig-label {
    text-align: center;
    font-size: 0.72rem;
    color: #718096;
    font-style: italic;
    margin-top: 4px;
}

/* Placeholder watermark overlay inside signature canvas container */
.signature-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none; /* Let clicks pass to canvas */
    color: #cbd5e0; /* Clean, modern light gray */
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    font-family: 'Raleway', sans-serif;
    user-select: none;
    opacity: 0.65;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 1;
}

.signature-placeholder.hidden {
    opacity: 0;
    visibility: hidden;
}