/* ============================================
   CRYSTAL CLEAR WINDOW WASHING - CUSTOM STYLES
   Design System: Blue, Yellow, White
   Mobile-first responsive design
   ============================================ */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
    /* Color Palette */
    --color-primary: #1e6ba8;          /* Professional blue */
    --color-primary-light: #2b8ad6;    /* Lighter blue for hovers */
    --color-primary-dark: #154a73;     /* Darker blue for depth */
    --color-accent: #ffc107;           /* Bright yellow accent */
    --color-accent-dark: #e0a800;      /* Darker yellow for hovers */
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #e9ecef;
    --color-gray-200: #dee2e6;
    --color-gray-300: #ced4da;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-900: #212529;

    /* Typography Scale */
    --font-family-base: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --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: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */

    /* Spacing Scale (Tailwind-inspired) */
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Container Max Width */
    --container-max-width: 1200px;
}

/* ============================================
   GLOBAL RESETS & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--spacing-6);
        padding-right: var(--spacing-6);
    }
}

.section {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
    .section {
        padding-top: var(--spacing-16);
        padding-bottom: var(--spacing-16);
    }
}

/* ============================================
   BUTTON COMPONENTS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

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

.btn-primary:active {
    transform: translateY(0);
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-gray-900);
    box-shadow: var(--shadow-md);
}

.btn-accent:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

/* ============================================
   HEADER COMPONENT
   ============================================ */
.site-header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--color-accent);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-4);
    padding-bottom: var(--spacing-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
    color: var(--color-primary);
}

.logo-icon {
    font-size: var(--font-size-4xl);
    color: var(--color-accent);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 900;
    color: var(--color-primary);
}

.nav-menu {
    display: none;
    gap: var(--spacing-6);
    list-style: none;
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray-700);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

.mobile-menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--spacing-2);
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-4);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.mobile-menu-link {
    display: block;
    padding: var(--spacing-3);
    text-decoration: none;
    color: var(--color-gray-700);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu-link:hover {
    background-color: var(--color-gray-50);
    color: var(--color-primary);
}

/* ============================================
   FOOTER COMPONENT
   ============================================ */
.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-6);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-section h3 {
    color: var(--color-accent);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4);
    font-weight: 700;
}

.footer-section p,
.footer-section a {
    color: var(--color-gray-300);
    line-height: 1.8;
    text-decoration: none;
}

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

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

.footer-icon {
    color: var(--color-accent);
    font-size: var(--font-size-xl);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-6);
    text-align: center;
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

/* ============================================
   CTA SECTION COMPONENT
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-12) var(--spacing-4);
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 900;
    margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
    .cta-title {
        font-size: var(--font-size-4xl);
    }
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-6);
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    align-items: center;
}

@media (min-width: 640px) {
    .cta-buttons {
        flex-direction: row;
        justify-content: center;
    }
}

/* ============================================
   SERVICE CARD COMPONENT
   ============================================ */
.service-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    height: 100%;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
    color: var(--color-white);
    font-size: var(--font-size-3xl);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-3);
}

.service-description {
    color: var(--color-gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-4);
}

.service-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    transition: gap var(--transition-fast);
}

.service-link:hover {
    gap: var(--spacing-3);
}

/* ============================================
   GRID UTILITIES
   ============================================ */
.service-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

@media (min-width: 640px) {
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .service-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}