/* ==========================================================================
   TrustKleen - Main Stylesheet (Modern Refresh)
   ==========================================================================

   TABLE OF CONTENTS
   -----------------
   1. CSS Custom Properties (Variables)
   2. Reset & Base Styles
   3. Typography
   4. Layout & Container
   5. Header & Navigation
   6. Buttons
   7. Hero Section
   8. Service Cards
   9. Specialty List
   9b. Image Gallery
   10. About Section
   11. Testimonials
   12. Call-to-Action Sections
   13. Footer
   14. Page-Specific Styles
   15. Utility Classes
   16. Media Queries (Responsive)

   ========================================================================== */


/* ==========================================================================
   1. CSS CUSTOM PROPERTIES (VARIABLES)
   ==========================================================================

   THEMING GUIDE: To change the site's look and feel, modify these variables.
   All colors, fonts, and spacing flow from these values.

   ========================================================================== */

:root {
    /* -- PRIMARY COLORS -- */
    --color-background:       #fafafa;    /* Clean off-white */
    --color-background-alt:   #f5f5f0;    /* Warm light gray */
    --color-background-dark:  #2c3e50;    /* Modern dark blue-gray */

    /* -- TEXT COLORS -- */
    --color-text-primary:     #1a1a1a;    /* Near black - high contrast */
    --color-text-body:        #4a4a4a;    /* Dark gray - readable */
    --color-text-muted:       #717171;    /* Medium gray - secondary text */
    --color-text-light:       #ffffff;    /* White - on dark backgrounds */

    /* -- ACCENT COLORS -- */
    --color-accent:           #2e7d5a;    /* Professional green - trust/growth */
    --color-accent-hover:     #236347;    /* Darker green for hover */
    --color-accent-light:     #e8f5e9;    /* Light green tint */
    --color-highlight:        #d4a855;    /* Warm gold - premium feel */

    /* -- UI COLORS -- */
    --color-border:           #e0e0e0;    /* Light border */
    --color-border-light:     #f0f0f0;    /* Subtle border */
    --color-shadow:           rgba(0, 0, 0, 0.08);   /* Soft shadows */
    --color-shadow-hover:     rgba(0, 0, 0, 0.12);   /* Hover shadows */

    /* -- FONTS -- */
    --font-primary:           'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-logo:              'Puritan', Georgia, serif;

    /* -- FONT SIZES -- */
    --font-size-base:         16px;
    --font-size-small:        0.875rem;   /* 14px */
    --font-size-body:         1rem;       /* 16px */
    --font-size-large:        1.125rem;   /* 18px */
    --font-size-xl:           1.25rem;    /* 20px */
    --font-size-h1:           2.75rem;    /* 44px */
    --font-size-h2:           2rem;       /* 32px */
    --font-size-h3:           1.5rem;     /* 24px */
    --font-size-h4:           1.25rem;    /* 20px */

    /* -- FONT WEIGHTS -- */
    --font-weight-normal:     400;
    --font-weight-medium:     500;
    --font-weight-semibold:   600;
    --font-weight-bold:       700;

    /* -- LINE HEIGHTS -- */
    --line-height-tight:      1.3;
    --line-height-base:       1.7;
    --line-height-loose:      1.9;

    /* -- SPACING -- */
    --space-xs:               0.25rem;    /* 4px */
    --space-sm:               0.5rem;     /* 8px */
    --space-md:               1rem;       /* 16px */
    --space-lg:               1.5rem;     /* 24px */
    --space-xl:               2.5rem;     /* 40px */
    --space-2xl:              4rem;       /* 64px */
    --space-3xl:              6rem;       /* 96px */

    /* -- LAYOUT -- */
    --container-max-width:    1140px;
    --container-padding:      1.5rem;

    /* -- BORDERS & RADIUS -- */
    --border-radius-sm:       6px;
    --border-radius-md:       12px;
    --border-radius-lg:       20px;
    --border-radius-full:     9999px;

    /* -- TRANSITIONS -- */
    --transition-fast:        150ms ease;
    --transition-base:        250ms ease;
    --transition-slow:        400ms ease;
}


/* ==========================================================================
   2. RESET & BASE STYLES
   ========================================================================== */

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text-body);
    background-color: var(--color-background);
}

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

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

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

ul, ol {
    list-style-position: outside;
    padding-left: var(--space-lg);
}


/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

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

p:last-child {
    margin-bottom: 0;
}

strong {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}


/* ==========================================================================
   4. LAYOUT & CONTAINER
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--space-3xl) 0;
}


/* ==========================================================================
   5. HEADER & NAVIGATION
   ========================================================================== */

.header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(250, 250, 250, 0.95);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

/* -- Logo -- */
.logo a {
    text-decoration: none;
    display: block;
}

.logo h1 {
    font-family: var(--font-logo);
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: 0;
    line-height: 1.1;
    letter-spacing: 0.02em;
}

.logo .tagline {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    margin-bottom: 0;
    font-weight: var(--font-weight-normal);
}

/* -- Navigation -- */
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    margin: 0;
    padding: 0;
}

.nav-menu a {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-body);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.nav-menu a.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

/* -- Mobile Nav Toggle -- */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}


/* ==========================================================================
   6. BUTTONS
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-primary);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--color-shadow-hover);
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-light);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-text-light);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-text-primary);
    box-shadow: none;
}

.btn-secondary:hover {
    background-color: var(--color-text-primary);
    color: var(--color-text-light);
    box-shadow: 0 4px 16px var(--color-shadow-hover);
}

/* Light button variant for dark backgrounds */
.btn-light {
    background-color: var(--color-text-light);
    color: var(--color-text-primary);
    border-color: var(--color-text-light);
}

.btn-light:hover {
    background-color: var(--color-highlight);
    border-color: var(--color-highlight);
    color: var(--color-text-primary);
}


/* ==========================================================================
   7. HERO SECTION
   ========================================================================== */

.hero {
    background-color: var(--color-background-dark);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
    padding: var(--space-3xl) 0;
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
}

/* Modern gradient overlay */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(44, 62, 80, 0.9) 0%,
        rgba(46, 125, 90, 0.85) 100%
    );
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: var(--font-size-h1);
    margin-bottom: var(--space-lg);
    color: var(--color-text-light);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    opacity: 0.9;
    line-height: var(--line-height-loose);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: var(--color-highlight);
    border-color: var(--color-highlight);
    color: var(--color-text-primary);
}

.hero .btn-primary:hover {
    background-color: #c49a4a;
    border-color: #c49a4a;
}

.hero .btn-secondary {
    border-color: var(--color-text-light);
    color: var(--color-text-light);
}

.hero .btn-secondary:hover {
    background-color: var(--color-text-light);
    color: var(--color-text-primary);
}


/* ==========================================================================
   8. SERVICE CARDS
   ========================================================================== */

.services-overview {
    text-align: center;
    background-color: var(--color-background);
}

.services-overview h2 {
    margin-bottom: var(--space-xl);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.service-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius-md);
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: 0 2px 12px var(--color-shadow);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--color-shadow-hover);
    border-color: var(--color-accent-light);
}

.service-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--space-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-md);
    color: var(--color-accent);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.service-card p {
    color: var(--color-text-muted);
    margin-bottom: 0;
    font-size: var(--font-size-body);
}

.services-cta {
    margin-top: var(--space-xl);
}


/* ==========================================================================
   9. SPECIALTY LIST
   ========================================================================== */

.specialties {
    background: linear-gradient(
        135deg,
        var(--color-background-dark) 0%,
        #1a2a3a 100%
    );
    color: var(--color-text-light);
    text-align: center;
}

.specialties h2 {
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
}

.specialty-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    list-style: none;
    max-width: 900px;
    margin: 0 auto;
    padding: 0;
}

.specialty-list li {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-medium);
    padding: var(--space-sm) var(--space-lg);
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-full);
    color: var(--color-text-light);
    transition: all var(--transition-fast);
}

.specialty-list li:hover {
    background-color: var(--color-highlight);
    border-color: var(--color-highlight);
    color: var(--color-text-primary);
}


/* ==========================================================================
   9b. IMAGE GALLERY
   ========================================================================== */

.gallery {
    padding: var(--space-xl) 0;
    background-color: var(--color-background-alt);
}

.gallery-grid {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.gallery-grid img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border: 3px solid var(--color-background);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.gallery-grid img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px var(--color-shadow-hover);
}


/* ==========================================================================
   10. ABOUT SECTION
   ========================================================================== */

.about {
    background-color: var(--color-background);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.about-content > p {
    font-size: var(--font-size-large);
    text-align: center;
}

.about-features {
    list-style: none;
    margin-top: var(--space-xl);
    padding: var(--space-xl);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-md);
}

.about-features li {
    padding: var(--space-md);
    padding-left: calc(var(--space-md) + 28px);
    position: relative;
    background-color: var(--color-background);
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.about-features li::before {
    content: "✓";
    position: absolute;
    left: var(--space-md);
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
    font-size: 1.1em;
}


/* ==========================================================================
   11. TESTIMONIALS
   ========================================================================== */

.testimonial {
    background-color: var(--color-background-alt);
    text-align: center;
}

.testimonial blockquote {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    padding: var(--space-xl);
}

.testimonial blockquote::before {
    content: '"';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    font-size: 6rem;
    color: var(--color-accent);
    opacity: 0.15;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial blockquote p {
    font-size: var(--font-size-xl);
    color: var(--color-text-body);
    margin-bottom: var(--space-lg);
    font-style: italic;
    line-height: var(--line-height-loose);
}

.testimonial blockquote cite {
    font-style: normal;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    font-size: var(--font-size-body);
}


/* ==========================================================================
   12. CALL-TO-ACTION SECTIONS
   ========================================================================== */

.cta {
    background: linear-gradient(
        135deg,
        var(--color-accent) 0%,
        var(--color-accent-hover) 100%
    );
    color: var(--color-text-light);
    text-align: center;
}

.cta h2 {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.cta p {
    font-size: var(--font-size-large);
    margin-bottom: var(--space-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}


/* ==========================================================================
   13. FOOTER
   ========================================================================== */

.footer {
    background-color: var(--color-text-primary);
    color: var(--color-text-light);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer h3,
.footer h4 {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-body);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer h3 {
    font-family: var(--font-logo);
    font-size: var(--font-size-h4);
    text-transform: none;
    letter-spacing: 0.02em;
}

.footer p {
    opacity: 0.8;
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-small);
}

.footer a {
    color: var(--color-text-light);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.footer a:hover {
    opacity: 1;
    color: var(--color-highlight);
}

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

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

.footer-links a {
    font-size: var(--font-size-small);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-links a {
    font-size: var(--font-size-small);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-small);
    margin-bottom: 0;
    opacity: 0.6;
}


/* ==========================================================================
   14. PAGE-SPECIFIC STYLES
   ========================================================================== */

/* -- Page Headers (for inner pages) -- */
.page-header {
    background: linear-gradient(
        135deg,
        var(--color-background-dark) 0%,
        var(--color-accent-hover) 100%
    );
    padding: var(--space-2xl) 0;
    text-align: center;
}

.page-header h1 {
    margin-bottom: var(--space-sm);
    color: var(--color-text-light);
}

.page-header p {
    color: var(--color-text-light);
    opacity: 0.9;
    margin-bottom: 0;
    font-size: var(--font-size-large);
}

/* -- Content Sections (for inner pages) -- */
.content-section {
    padding: var(--space-2xl) 0;
}

.content-section h2 {
    margin-bottom: var(--space-lg);
}

.content-section h3 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

/* -- FAQ Styles -- */
.faq-item {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--color-accent);
}

.faq-item:last-child {
    margin-bottom: 0;
}

.faq-item h3 {
    margin-top: 0;
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-large);
    color: var(--color-text-primary);
}

.faq-item p {
    margin-bottom: 0;
    color: var(--color-text-body);
}

/* -- Tips/Ordered Lists -- */
.tips-section {
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius-md);
}

.tips-section h2 {
    margin-bottom: var(--space-lg);
}

.tips-section ol {
    list-style: decimal;
    padding-left: var(--space-lg);
}

.tips-section li {
    margin-bottom: var(--space-md);
    padding-left: var(--space-sm);
}

.tips-section li strong {
    color: var(--color-text-primary);
}

/* -- Pricing/Services List -- */
.service-category {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background-color: #eceee8;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.service-category h2 {
    font-size: var(--font-size-h3);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: var(--space-lg);
}

.service-category > p {
    color: var(--color-text-body);
}

.service-category ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
}

.service-category li {
    padding: var(--space-sm) var(--space-md);
    padding-left: calc(var(--space-md) + 20px);
    position: relative;
    background-color: var(--color-background);
    border-radius: var(--border-radius-sm);
}

.service-category li::before {
    content: "•";
    position: absolute;
    left: var(--space-md);
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
}

/* -- Contact Page -- */
.contact-info {
    max-width: 600px;
}

.contact-info > p {
    font-size: var(--font-size-large);
}

.contact-method {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius-md);
}

.contact-method strong {
    display: block;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-method a {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.contact-social a {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-medium);
}

.contact-note {
    background-color: var(--color-accent-light);
    padding: var(--space-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-accent);
}

.contact-note h3 {
    margin-top: 0;
    color: var(--color-accent-hover);
}

.contact-note ul {
    list-style: disc;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

.contact-note li {
    margin-bottom: var(--space-sm);
}

/* -- Promo & Feature Images -- */
.promo-image {
    max-width: 450px;
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: var(--space-lg) auto;
    display: block;
    box-shadow: 0 8px 30px var(--color-shadow-hover);
}

.feature-image {
    max-width: 600px;
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: 0 auto;
    display: block;
    box-shadow: 0 4px 20px var(--color-shadow);
}

/* -- Before & After Section -- */
.before-after {
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius-md);
}

.before-after h2 {
    margin-bottom: var(--space-md);
}

.before-after-image {
    max-width: 280px;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: var(--space-lg) auto;
    display: block;
    box-shadow: 0 4px 20px var(--color-shadow);
}

/* -- Intro Text -- */
.intro-text {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.intro-text p {
    font-size: var(--font-size-large);
}


/* ==========================================================================
   15. UTILITY CLASSES
   ========================================================================== */

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}


/* ==========================================================================
   16. MEDIA QUERIES (RESPONSIVE)
   ========================================================================== */

/* -- Tablet and below -- */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.625rem;
        --font-size-h3: 1.25rem;
        --space-3xl: 4rem;
    }

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

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0;
        padding-top: var(--space-md);
        background-color: var(--color-background);
    }

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

    .nav-menu li {
        border-top: 1px solid var(--color-border-light);
    }

    .nav-menu a {
        display: block;
        padding: var(--space-md);
        border-radius: 0;
    }

    .header-content {
        flex-wrap: wrap;
    }

    .nav {
        width: 100%;
        order: 3;
    }

    /* Hero adjustments */
    .hero {
        min-height: 400px;
        padding: var(--space-2xl) 0;
    }

    .hero h2 {
        font-size: var(--font-size-h2);
    }

    /* Service grid */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* Footer grid */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

    /* About features */
    .about-features {
        grid-template-columns: 1fr;
    }

    /* Service category lists */
    .service-category ul {
        grid-template-columns: 1fr;
    }
}

/* -- Mobile -- */
@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
        --font-size-h1: 1.75rem;
        --font-size-h2: 1.5rem;
    }

    .hero-cta,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .specialty-list {
        flex-direction: column;
        align-items: center;
    }

    .specialty-list li {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    .gallery-grid img {
        width: 120px;
        height: 120px;
    }
}