/* ===========================================================================
   NBAQUATICS - Premium Pool Construction & Design
   Custom Aquatic Design & Engineering
   =========================================================================== */

/* ===========================================================================
   CSS VARIABLES - Brand Colors & Spacing
   =========================================================================== */

   :root {
    /* Brand Colors - Clean whites with blue accents */
    --primary-blue: #1e5a8e;        /* Deep professional blue from logo */
    --accent-blue: #4a9fd8;         /* Lighter blue for highlights */
    --text-dark: #2c3e50;           /* Dark slate for body text */
    --text-muted: #7f8c8d;          /* Muted text for secondary info */
    --white: #ffffff;
    --off-white: #f8f9fa;           /* Subtle background variation */
    --border-light: #e1e8ed;        /* Subtle borders */
    
    /* Typography */
    --font-heading: 'Georgia', 'Times New Roman', serif;  /* Classic, professional */
    --font-body: 'Helvetica Neue', Arial, sans-serif;     /* Clean, readable */
    --font-ui: 'Helvetica Neue', Arial, sans-serif;
    
    /* Font Sizes - Mobile First */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 2rem;      /* 32px */
    --font-size-4xl: 2.5rem;    /* 40px */
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing - Using 8px base unit */
    --spacing-unit: 0.5rem;     /* 8px */
    --spacing-xs: 0.5rem;       /* 8px */
    --spacing-sm: 1rem;         /* 16px */
    --spacing-md: 1.5rem;       /* 24px */
    --spacing-lg: 2rem;         /* 32px */
    --spacing-xl: 3rem;         /* 48px */
    --spacing-2xl: 4rem;        /* 64px */
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    --border-radius-full: 50%;
    
    /* Borders */
    --border-std: 1px solid var(--border-light);
    
    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
}

/* ===========================================================================
   BASE RESETS & GLOBAL STYLES
   =========================================================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-dark);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================================================================
   TYPOGRAPHY
   =========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
}

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

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-relaxed);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===========================================================================
   HEADER STYLES - Mobile First
   =========================================================================== */

#header-container {
    width: 100%;
    background-color: var(--white);
    border-bottom: var(--border-std);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--white);
}

.header-content-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

/* Nav Container */
.nav-page-hero-container {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

/* Page Hero Content in Header - appears below header-content-grid */
.header .page-hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xs) var(--spacing-md);
    border-top: var(--border-std);
    display: flex;
    justify-content: center;
    background-color: var(--white);
}

.header .page-hero-content-inner {
    width: fit-content;
    max-width: 675px;
    text-align: center;
}

.header .page-hero-content h1 {
    font-size: var(--font-size-lg);
    margin-bottom: 2px;
    color: var(--primary-blue);
    line-height: 1.2;
}

.header .page-hero-subtitle {
    font-size: var(--font-size-xs);
    margin-bottom: 0;
    color: var(--text-dark);
    line-height: 1.3;
}

.nav-page-hero-container .page-hero-content h1 {
    font-size: var(--font-size-lg);
    margin-bottom: 2px;
    color: var(--primary-blue);
    line-height: 1.2;
}

.nav-page-hero-container .page-hero-subtitle {
    font-size: var(--font-size-xs);
    margin-bottom: 0;
    color: var(--text-dark);
    line-height: 1.3;
}

/* ===========================================================================
   LOGO & HERO SECTION
   =========================================================================== */

.hero-nav-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.logo {
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
    background-color: var(--white);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
}

.logo-link {
    display: block;
    background-color: var(--white);
}

.logo-image {
    width: 100%;
    height: auto;
    max-height: 120px;
    object-fit: contain;
    display: block;
}

/* Hero Text - Only on index page */
.hero-text {
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-sm);
}

.hero-text h1 {
    font-size: var(--font-size-2xl);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.hero-heading {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-normal);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.hero-subtext {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-family: var(--font-body);
    font-weight: var(--font-weight-normal);
}

/* ===========================================================================
   NAVIGATION - Mobile First
   =========================================================================== */

.main-nav {
    position: relative;
    width: 100%;
}

/* Mobile Hamburger Button */
.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    margin: auto;
    z-index: 101;
}

.nav-toggle span {
    display: block;
    width: 30px;
    height: 3px;
    background-color: var(--primary-blue);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.nav-toggle:hover span {
    background-color: var(--accent-blue);
}

/* Navigation Columns Container */
.nav-columns {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: var(--white);
    border: var(--border-std);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-sm);
    max-height: 80vh;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-columns.active {
    display: flex;
}

/* Individual Navigation Column */
.nav-column {
    border-bottom: var(--border-std);
}

.nav-column:last-child {
    border-bottom: none;
}

.nav-column-header {
    padding: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg);
    color: var(--primary-blue);
    cursor: pointer;
    background-color: var(--off-white);
    transition: background-color 0.3s ease;
}

.nav-column-header:hover {
    background-color: var(--border-light);
}

.nav-text {
    font-family: var(--font-ui);
    letter-spacing: 0.5px;
}

/* Dropdown Menu */
.nav-menu {
    list-style: none;
    display: none;
    flex-direction: column;
    padding: var(--spacing-sm);
    background-color: var(--white);
}

.nav-dropdown {
    display: flex;
}

.nav-item {
    margin: 0;
}

.nav-item a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-dark);
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    border-radius: var(--border-radius);
}

.nav-item a:hover {
    background-color: var(--off-white);
    color: var(--primary-blue);
    padding-left: calc(var(--spacing-md) + 8px);
}

/* ===========================================================================
   HERO SECTION (Index Page)
   =========================================================================== */

.hero-section {
    position: relative;
    width: 100%;
    margin-bottom: var(--spacing-unit);
    overflow: hidden;
}

.hero-image-container {
    width: 100%;
    max-height: 60vh;
    overflow: hidden;
    position: relative;
}

.hero-image-container img {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
}

.hero-image-placeholder .image-note {
    display: none; /* Hide placeholder text */
}

.hero-overlay-text {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--white);
    text-align: center;
}

.hero-overlay-text h2 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-2xl);
}

.hero-overlay-text p {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-semibold);
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: var(--accent-blue);
    color: var(--white);
}

/* ===========================================================================
   MAIN CONTENT AREA
   =========================================================================== */

.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md);
}

/* ===========================================================================
   FOOTER STYLES - Mobile First
   =========================================================================== */

#footer-container {
    width: 100%;
    background-color: var(--off-white);
    border-top: var(--border-std);
    margin-top: var(--spacing-unit);
}

.footer {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: var(--spacing-xl) var(--spacing-md);
    font-family: var(--font-ui);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: var(--max-width);
    gap: var(--spacing-md);
}

/* Footer Logo */
.footer-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-full);
    border: 2px solid var(--border-light);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
}

.footer-logo-image {
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* Footer Info */
.footer-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
    width: 100%;
}

.footer-quote {
    font-style: italic;
    color: var(--text-muted);
    font-size: var(--font-size-base);
    max-width: 600px;
}

.footer-business-hours {
    color: var(--text-dark);
    font-size: var(--font-size-sm);
    margin: var(--spacing-xs) 0;
}

.footer-heading {
    color: var(--primary-blue);
    font-weight: var(--font-weight-semibold);
    margin-right: var(--spacing-xs);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-md);
}

.footer-copyright a {
    color: var(--text-muted);
    text-decoration: underline;
}

.footer-copyright a:hover {
    color: var(--primary-blue);
}

/* ===========================================================================
   DESKTOP STYLES (min-width: 768px)
   =========================================================================== */

@media (min-width: 768px) {
    /* Header Desktop Layout */
    .header {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    .header-content-grid {
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .hero-nav-container {
        align-items: center;
        gap: var(--spacing-md);
        flex: 1 1 auto;
        min-width: fit-content;
        flex-wrap: nowrap;
    }
    
    .logo {
        max-width: none;
        width: auto;
        flex-shrink: 0;
        margin: 0;
        align-self: center;
    }
    
    .logo-image {
        max-width: 750px;
        width: auto;
        height: auto;
        max-height: 120px;
        object-fit: contain;
        display: block;
    }
    
    .hero-text {
        flex: 1 1 auto;
        padding: 0;
        align-self: center;
        margin: 0;
        min-width: fit-content;
        white-space: nowrap;
    }
    
    .hero-text h1 {
        font-size: var(--font-size-lg);
        margin-bottom: 4px;
        line-height: 1.2;
        white-space: nowrap;
    }
    
    .hero-heading {
        font-size: var(--font-size-sm);
        margin-bottom: 2px;
        line-height: 1.3;
        white-space: nowrap;
    }
    
    .hero-subtext {
        font-size: var(--font-size-xs);
        margin-bottom: 0;
        line-height: 1.3;
        white-space: nowrap;
    }
    
    .nav-page-hero-container {
        flex: 0 0 auto;
        align-items: flex-end;
    }
    
    .main-nav {
        flex: 0 0 auto;
        width: auto;
    }
    
    /* Desktop Navigation */
    .nav-toggle {
        display: none;
    }
    
    .nav-columns {
        display: flex !important;
        flex-direction: row;
        border: none;
        margin-top: 0;
        gap: var(--spacing-sm);
        max-height: none;
        overflow: visible;
    }
    
    .nav-column {
        border: none;
        border-bottom: none;
    }
    
    .nav-column-header {
        background-color: transparent;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        background-color: var(--white);
        border: var(--border-std);
        border-radius: var(--border-radius);
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        min-width: 200px;
        z-index: 1000;
    }
    
    .nav-column:hover .nav-menu {
        display: flex;
    }
    
    .nav-page-hero-container {
        position: relative;
    }
    
    /* Page Hero Content in Header - Desktop */
    .header .page-hero-content {
        padding: var(--spacing-xs) var(--spacing-lg);
        justify-content: flex-end;
    }
    
    .header .page-hero-content-inner {
        width: 675px;
        max-width: 675px;
        text-align: left;
    }
    
    .header .page-hero-content h1 {
        font-size: var(--font-size-lg);
    }
    
    .header .page-hero-subtitle {
        font-size: var(--font-size-xs);
    }
    
    /* Footer Desktop Layout */
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .footer-logo {
        width: 100px;
        height: 100px;
    }
    
    .footer-info {
        flex-direction: row;
        text-align: left;
        flex-wrap: wrap;
        justify-content: flex-end;
        max-width: 80%;
    }
}

/* ===========================================================================
   MID-SIZE DESKTOP (min-width: 900px) - Better spacing for hero text
   =========================================================================== */

@media (min-width: 900px) {
    .header-content-grid {
        gap: var(--spacing-lg);
    }
    
    .hero-nav-container {
        gap: var(--spacing-lg);
        flex: 1 1 50%;
        min-width: 0;
    }
    
    .hero-text {
        flex: 1 1 auto;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .hero-text h1 {
        font-size: var(--font-size-xl);
    }
    
    .hero-heading {
        font-size: var(--font-size-base);
    }
    
    .hero-subtext {
        font-size: var(--font-size-sm);
    }
    
    .main-nav {
        flex: 0 1 auto;
        min-width: fit-content;
    }
    
    .nav-columns {
        gap: var(--spacing-xs);
    }
    
    .nav-column-header {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
}

/* ===========================================================================
   LARGE DESKTOP (min-width: 1024px)
   =========================================================================== */

@media (min-width: 1024px) {
    .logo-image {
        max-width: 750px;
        max-height: 150px;
    }
    
    .hero-text h1 {
        font-size: var(--font-size-2xl);
    }
    
    .hero-heading {
        font-size: var(--font-size-base);
    }
    
    .hero-nav-container {
        gap: var(--spacing-lg);
    }
    
    .hero-image-container {
        max-height: 70vh;
    }
    
    .hero-overlay-text {
        padding: var(--spacing-unit) var(--spacing-lg);
    }
    
    .hero-overlay-text h2 {
        font-size: var(--font-size-3xl);
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-lg);
    }
}

/* ===========================================================================
   SERVICE PAGE STYLES
   =========================================================================== */

/* Page Hero (different from index hero) */
.page-hero {
    margin-bottom: var(--spacing-unit);
}

.page-hero-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    position: relative;
}

.page-hero-image .image-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.page-hero-image .image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.page-hero-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
    position: relative;
}

.page-hero-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.page-hero-content {
    background-color: var(--white);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm) var(--spacing-md);
    text-align: center;
}

.page-hero-content h1 {
    color: var(--primary-blue);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xs);
}

.page-hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-dark);
    max-width: 800px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

/* Content Sections */
.content-section {
    padding: var(--spacing-unit) var(--spacing-md);
}

.content-section.bg-light {
    background-color: var(--off-white);
    margin: 0 calc(-1 * var(--spacing-md));
}

.content-wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
}

.lead-text {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

/* Process Grid */
.process-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.process-step {
    background-color: var(--white);
    border: var(--border-std);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    position: relative;
}

.step-number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--accent-blue);
    opacity: 0.2;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-family: var(--font-heading);
}

.process-step h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.process-step p {
    color: var(--text-dark);
    line-height: var(--line-height-relaxed);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    background-color: var(--white);
    border-left: 4px solid var(--primary-blue);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.feature-item img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.feature-item h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-lg);
    margin: 0;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-lg) 0 var(--spacing-lg);
}

.feature-item img + h3 {
    padding-top: var(--spacing-lg);
}

.feature-item p {
    color: var(--text-dark);
    line-height: var(--line-height-relaxed);
    margin: 0;
    padding: 0 var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
}

/* Quality Content */
.quality-content {
    max-width: 900px;
    margin: 0 auto;
}

.quality-list {
    margin-top: var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.quality-item {
    padding: var(--spacing-lg);
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    border: var(--border-std);
}

.quality-item h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.quality-item p {
    color: var(--text-dark);
    line-height: var(--line-height-relaxed);
}

/* Why Grid */
.why-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.why-item {
    padding: var(--spacing-xl);
    background-color: var(--off-white);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.why-item h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.why-item p {
    color: var(--text-dark);
    line-height: var(--line-height-relaxed);
}

/* Before & After Grid */
.before-after-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.before-after-item {
    text-align: center;
}

.before-after-item h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.before-after-item img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    display: block;
}

/* Desktop Responsive for Service Pages */
@media (min-width: 768px) {
    .page-hero-image {
        height: 350px;
    }
    
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quality-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .before-after-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .page-hero-image {
        height: 450px;
    }
    
    .process-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===========================================================================
   UTILITY CLASSES
   =========================================================================== */

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

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

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

/* Page Navigation Links */
.page-nav-link {
    color: var(--primary-blue);
    text-decoration: underline;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: var(--spacing-md);
    transition: color 0.3s ease;
}

.page-nav-link:hover {
    color: var(--accent-blue);
}

/* ===========================================================================
   TILE CATALOG STYLES
   =========================================================================== */

/* Tiles Controls - Search and Filters */
.tiles-controls {
    margin-bottom: var(--spacing-unit);
}

.tiles-search-form {
    margin-bottom: var(--spacing-lg);
}

.search-input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tiles-search-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: var(--border-std);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-body);
}

.tiles-search-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 90, 142, 0.1);
}

.tiles-search-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.tiles-search-button:hover {
    background-color: var(--accent-blue);
}

.tiles-filters {
    background-color: var(--off-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: var(--border-std);
}

.tiles-filter-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-group label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: var(--border-std);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-body);
    background-color: var(--white);
    color: var(--text-dark);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(30, 90, 142, 0.1);
}

.filter-apply-button,
.filter-reset-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-block;
}

.filter-apply-button {
    background-color: var(--primary-blue);
    color: var(--white);
}

.filter-apply-button:hover {
    background-color: var(--accent-blue);
}

.filter-reset-button {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 1px solid var(--primary-blue);
}

.filter-reset-button:hover {
    background-color: var(--off-white);
}

/* Results Info */
.tiles-results-info {
    (--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--off-white);
    border-radius: var(--border-radius);
}

.tiles-results-info p {
    margin: 0;
    color: var(--text-dark);
    font-size: var(--font-size-base);
}

/* Tiles Grid */
.tiles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.tile-card {
    background-color: var(--white);
    border: var(--border-std);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.tile-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tile-image-container {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: var(--off-white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.tile-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--off-white);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.tile-info {
    padding: var(--spacing-lg);
}

.tile-name {
    color: var(--primary-blue);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
}

.tile-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tile-series {
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    font-size: var(--font-size-base);
}

.tile-code {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.tile-specs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tile-spec {
    font-size: var(--font-size-sm);
    color: var(--text-dark);
    background-color: var(--off-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
}

.tile-description {
    color: var(--text-dark);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

.tiles-empty {
    text-align: center;
    padding: var(--spacing-unit);
    background-color: var(--off-white);
    border-radius: var(--border-radius-lg);
    border: var(--border-std);
}

.tiles-empty p {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
    margin: 0;
}

/* Desktop Responsive for Tile Catalog */
@media (min-width: 768px) {
    .tiles-filter-form {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .filter-apply-button,
    .filter-reset-button {
        grid-column: span 1;
    }
    
    .tiles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tile-image-container {
        height: 300px;
    }
}

@media (min-width: 1024px) {
    .tiles-filter-form {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .filter-apply-button,
    .filter-reset-button {
        grid-column: span 1;
    }
    
    .tiles-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tile-image-container {
        height: 350px;
    }
}