/**
 * Lucia Piano - Main Stylesheet
 * 
 * Mobile-first responsive design with CSS custom properties.
 * Target: <15KB total CSS
 */

/* ========================================
   CSS Custom Properties
   ======================================== */
:root {
    /* Colors */
    --color-primary: #2c3e50;
    --color-secondary: #3498db;
    --color-accent: #e74c3c;
    --color-success: #27ae60;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-gray: #f8f9fa;
    --color-border: #e1e5e9;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 40px;
    --line-height: 1.6;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    --space-5xl: 128px;
    
    /* Layout */
    --container-max: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-primary);
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

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

ul, ol {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

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

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

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

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

.section--cta h2 {
    color: white;
}

.text-center {
    text-align: center;
}

/* ========================================
   Skip Link (Accessibility)
   ======================================== */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
}

.skip-link:focus {
    top: var(--space-md);
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ========================================
   Header
   ======================================== */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--color-primary);
}

.logo:hover {
    text-decoration: none;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-list {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: var(--space-md);
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
}

.nav-link:hover {
    color: var(--color-secondary);
    text-decoration: none;
}

.nav-link--active {
    color: var(--color-secondary);
}

.nav-link--cta {
    background-color: var(--color-secondary);
    color: white;
    border-radius: var(--border-radius);
}

.nav-link--cta:hover {
    background-color: var(--color-primary);
    color: white;
}

.nav-phone {
    display: none;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-primary);
    font-weight: 600;
}

.nav-phone-icon {
    font-size: var(--font-size-lg);
}

/* Mobile menu toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle-bar {
    width: 24px;
    height: 3px;
    background-color: var(--color-primary);
    transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile nav open state */
.nav-list--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Breadcrumbs
   ======================================== */
.breadcrumbs {
    background-color: var(--color-bg-gray);
    padding: var(--space-sm) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: var(--space-sm);
}

.breadcrumb-list li:not(:last-child)::after {
    content: '›';
    margin-left: var(--space-sm);
    color: var(--color-text-light);
}

.breadcrumb-list a {
    color: var(--color-text-light);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: var(--space-5xl) 0;
    text-align: center;
    overflow: hidden;
}

/* Hero with background image - overlay reduces image opacity.
   Prefers the lighter WebP (FR-17); the url() line is the JPEG fallback for
   browsers that don't support image-set(). */
.hero--with-image {
    background: 
        linear-gradient(135deg, rgba(44, 62, 80, 0.75) 0%, rgba(52, 152, 219, 0.75) 100%),
        url('/assets/img/hero.jpg') center/cover no-repeat;
    background:
        linear-gradient(135deg, rgba(44, 62, 80, 0.75) 0%, rgba(52, 152, 219, 0.75) 100%),
        image-set(url('/assets/img/hero.webp') type('image/webp'),
                  url('/assets/img/hero.jpg') type('image/jpeg')) center/cover no-repeat;
}

/* Fallback gradient for browsers without background-image support */
@supports not (background-image: url('/assets/img/hero.jpg')) {
    .hero--with-image {
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    }
}

.hero h1 {
    color: white;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 1;
}

.hero__cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
    position: relative;
    z-index: 1;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
}

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

.btn-primary:hover {
    background-color: var(--color-bg-gray);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--font-size-lg);
}

/* ========================================
   Cards
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.card-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.card-title {
    margin-bottom: var(--space-sm);
}

.card-price {
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--color-secondary);
    margin-top: var(--space-md);
}

/* ========================================
   Forms
   ======================================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-error {
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

.form-success {
    background-color: #d4edda;
    color: #155724;
    padding: var(--space-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-lg);
}

/* Honeypot field - hidden from users */
.hp-field {
    position: absolute;
    left: -9999px;
}

/* ========================================
   Lists
   ======================================== */
.neighborhood-list,
.nearby-list {
    columns: 2;
    list-style: none;
    padding: 0;
}

.neighborhood-list li,
.nearby-list li {
    padding: var(--space-xs) 0;
}

/* ========================================
   FAQ
   ======================================== */
.faq-item {
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
}

.faq-question {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    cursor: pointer;
}

.faq-answer {
    color: var(--color-text-light);
}

/* ========================================
   City Link List (Werkgebied chips)
   ======================================== */
.city-link-list {
    list-style: none;
    padding: 0;
    margin: var(--space-xl) 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.city-link-list li {
    margin: 0;
    padding: 0;
}

.city-link-list a {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-bg-gray);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    white-space: nowrap;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.city-link-list a:hover,
.city-link-list a:focus {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
    text-decoration: none;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--color-primary);
    color: white;

    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-title {
    color: white;
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
}

.footer a:hover {
    color: white;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-usp {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius);
    display: inline-block;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* ========================================
   404 Page
   ======================================== */
.error-page {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.error-page h1 {
    font-size: var(--font-size-3xl);
}

/* ========================================
   Responsive - Tablet
   ======================================== */
@media (min-width: 768px) {
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    
    .hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    .hero__cta {
        flex-direction: row;
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .neighborhood-list,
    .nearby-list {
        columns: 3;
    }
}

/* ========================================
   Responsive - Desktop
   ======================================== */
@media (min-width: 1024px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-list {
        display: flex;
    }
    
    .nav-phone {
        display: flex;
    }
    
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .header,
    .footer,
    .nav,
    .breadcrumbs,
    .hero__cta {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}