/* ========================================
   Pheelio Global Styles
   Pantone 300 Blue & White Theme
   WCAG 2.1 AA Adherence - 4.5:1 Contrast
   ======================================== */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Color Palette - Pantone 300 Blue & White */
    --color-primary: #005EB8;           /* Pantone 300 Blue - 6.5:1 contrast on white */
    --color-primary-light: #0073E6;     /* Lighter blue for hover states */
    --color-primary-dark: #003D7A;      /* Dark blue for footer/emphasis */
    --color-accent: #005EB8;            /* Accent matches primary for cohesion */
    --color-accent-hover: #0073E6;      /* Hover state for accent */
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-gray-100: #e9ecef;
    --color-gray-200: #dee2e6;
    --color-gray-600: #495057;          /* 7.0:1 contrast on white */
    --color-gray-800: #212529;          /* 16:1 contrast on white */
    --color-black: #000000;
    
    /* Status Colors */
    --color-success: #059669;
    --color-success-light: #d1fae5;
    --color-error: #dc2626;
    --color-error-light: #fee2e2;
    
    /* Typography */
    --font-heading: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Font Sizes (fluid typography) */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
    --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
    --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 3rem);
    --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 4rem);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Layout */
    --max-width: 1280px;
    --header-height: 4rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* ========================================
   Skip Link (Accessibility)
   ======================================== */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: 9999;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
    outline: 3px solid var(--color-primary-light);
    outline-offset: 2px;
}

/* ========================================
   Focus Styles (Accessibility)
   ======================================== */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* ========================================
   Visually Hidden (Screen Reader Only)
   ======================================== */
.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;
}

/* ========================================
   Header
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-100);
    transition: background-color var(--transition-base);
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo {
    height: 3rem;
    width: auto;
    max-width: 160px;
    object-fit: contain;
}

@media (min-width: 640px) {
    .logo {
        height: 4rem;
        max-width: 200px;
    }
}

@media (min-width: 1024px) {
    .logo {
        height: 5rem;
        max-width: 240px;
    }
}

.logo-fallback {
    display: none;
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav-list a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    min-height: 2.25rem;
    min-width: 2.25rem;
    padding: var(--space-xs) var(--space-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-radius: var(--radius-sm);
}

@media (min-width: 640px) {
    .nav-list {
        gap: var(--space-md);
    }
    
    .nav-list a {
        font-size: var(--text-base);
        padding: var(--space-xs) var(--space-md);
        min-height: 2.5rem;
    }
}

@media (min-width: 1024px) {
    .nav-list {
        gap: var(--space-lg);
    }
    
    .nav-list a {
        font-size: var(--text-base);
        padding: var(--space-sm) var(--space-lg);
        min-height: 2.5rem;
    }
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0.25rem;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
    border-radius: 2px;
}

.nav-list a:hover,
.nav-list a:focus {
    color: var(--color-primary);
    background-color: rgba(0, 94, 184, 0.05);
}

.nav-list a:hover::after,
.nav-list a:focus::after {
    width: calc(100% - var(--space-lg));
}

.nav-list a:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
    background-color: rgba(0, 94, 184, 0.1);
}

.nav-cta {
    min-height: 2.25rem !important;
    padding: var(--space-xs) var(--space-sm) !important;
    background-color: var(--color-primary) !important;
    color: var(--color-white) !important;
    border-radius: var(--radius-md);
    font-weight: 600 !important;
    font-size: var(--text-sm) !important;
    transition: background-color var(--transition-fast) !important;
}

@media (min-width: 640px) {
    .nav-cta {
        min-height: 2.5rem !important;
        padding: var(--space-xs) var(--space-md) !important;
        font-size: var(--text-base) !important;
    }
}

@media (min-width: 1024px) {
    .nav-cta {
        min-height: 2.5rem !important;
        padding: var(--space-sm) var(--space-lg) !important;
        font-size: var(--text-base) !important;
    }
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover,
.nav-cta:focus {
    background-color: var(--color-primary-light) !important;
    color: var(--color-white) !important;
}

.nav-cta:focus-visible {
    outline: 3px solid var(--color-primary-dark) !important;
    outline-offset: 3px !important;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 140vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background-image: url('eye.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

@supports (-webkit-touch-callout: none) {
    .hero-background {
        background-attachment: scroll;
    }
}

@media (hover: none) and (pointer: coarse) {
    .hero-background {
        background-attachment: scroll;
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 61, 122, 0.75);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 50rem;
    padding: var(--space-xl);
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 600;
    line-height: 1.15;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: var(--text-xl);
    font-weight: 400;
    color: var(--color-gray-100);
    margin-bottom: var(--space-2xl);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background-color: var(--color-white);
    color: var(--color-primary);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.hero-cta:hover,
.hero-cta:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--space-4xl) var(--space-lg);
    background-color: var(--color-off-white);
}

.features-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Section Heading - Blue Text */
.section-heading {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--space-3xl);
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: var(--space-2xl);
}

.feature-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition-base);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Feature Images - Round (Circular)
   ======================================== */
.feature-image-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background-color: var(--color-off-white);
}

/* Round Feature Images */
.feature-image {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 50%;
    transition: transform var(--transition-base);
}

/* Responsive Image Sizing */
@media (min-width: 768px) {
    .feature-image {
        width: 320px;
        height: 320px;
    }
}

@media (min-width: 1024px) {
    .feature-image {
        width: 360px;
        height: 360px;
    }
}

@media (min-width: 1280px) {
    .feature-image {
        width: 400px;
        height: 400px;
    }
}

.feature-card:hover .feature-image {
    transform: scale(1.02);
}

.feature-content {
    padding: var(--space-xl);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.feature-description {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ========================================
   Page Hero Section (For Internal Pages)
   ======================================== */
.page-hero {
    padding-top: calc(var(--header-height) + var(--space-4xl));
    padding-bottom: var(--space-4xl);
    background-color: var(--color-primary);
    text-align: center;
}

.page-hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.page-hero h1 {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.page-hero h2,
.page-hero-subtitle {
    font-family: var(--font-body);
    font-size: var(--text-xl);
    font-weight: 400;
    color: var(--color-gray-100);
    max-width: 40rem;
    margin: 0 auto;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: var(--space-4xl) var(--space-lg);
    background-color: var(--color-primary);
    text-align: center;
}

.cta-container {
    max-width: 40rem;
    margin: 0 auto;
}

.cta-section h2 {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.cta-description {
    font-size: var(--text-lg);
    color: var(--color-gray-100);
    margin-bottom: var(--space-2xl);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background-color: var(--color-white);
    color: var(--color-primary);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.cta-button:hover,
.cta-button:focus {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

/* ========================================
   Universal Footer Styles
   ======================================== */
.site-footer {
    background-color: var(--color-primary-dark);
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Two-Column Layout */
.footer-columns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2xl);
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.footer-column {
    flex: 1 1 280px;
    max-width: 400px;
    text-align: center;
    padding: var(--space-xl);
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: background-color var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
}

.footer-column:hover {
    background-color: rgba(255, 255, 255, 0.12);
}

.footer-heading {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.01em;
}

/* Footer CTA Buttons - Consistent Blue Theme */
.footer-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base), color var(--transition-base);
    cursor: pointer;
}

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

.footer-cta--primary:hover,
.footer-cta--primary:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.footer-cta:focus-visible {
    outline: 3px solid var(--color-white);
    outline-offset: 3px;
}

/* Simple Footer Actions (for contact/feedback pages) */
.footer-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.footer-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-2xl);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-base), color var(--transition-base);
}

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

.footer-button--primary:hover,
.footer-button--primary:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.footer-button[aria-current="page"] {
    opacity: 0.7;
    cursor: default;
    pointer-events: none;
}

/* Footer Bottom Section */
.footer-bottom,
.footer-meta {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.copyright {
    font-size: var(--text-sm);
    color: var(--color-gray-200);
    margin-bottom: var(--space-sm);
}

.accessibility-statement {
    font-size: var(--text-xs);
    color: var(--color-gray-200);
}

/* Responsive Footer */
@media (max-width: 640px) {
    .footer-columns {
        flex-direction: column;
        align-items: center;
    }

    .footer-column {
        width: 100%;
        max-width: 100%;
    }

    .footer-cta,
    .footer-button {
        width: 100%;
    }
    
    .footer-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.feature-card {
    animation: fadeIn 0.6s ease-out backwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .hero-background {
        background-attachment: scroll;
    }
}

/* ========================================
   High Contrast Mode Support
   ======================================== */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #003D7A;
    }
    
    .hero-overlay {
        background-color: rgba(0, 0, 0, 0.8);
    }
    
    .feature-card {
        border: 2px solid var(--color-gray-800);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .site-header,
    .hero-cta,
    .cta-section,
    .skip-link {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: var(--space-xl);
    }
    
    .hero-background,
    .hero-overlay {
        display: none;
    }
    
    .hero h1,
    .hero-subtitle {
        color: var(--color-black);
    }
    
    .feature-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--color-gray-200);
    }
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (min-width: 640px) {
    :root {
        --header-height: 5rem;
    }
}

@media (min-width: 1024px) {
    :root {
        --header-height: 6rem;
    }
}

@media (min-width: 1280px) {
    :root {
        --header-height: 6.5rem;
    }
}

@media (max-width: 768px) {
    .nav-list {
        gap: var(--space-sm);
    }
    
    .nav-list a:not(.nav-cta) {
        font-size: var(--text-sm);
        padding: var(--space-xs) var(--space-sm);
        min-height: 2.5rem;
        min-width: auto;
    }
    
    .hero-content {
        padding: var(--space-lg);
    }
    
    .features {
        padding: var(--space-3xl) var(--space-md);
    }
    
    .feature-content {
        padding: var(--space-lg);
    }
    
    .page-hero {
        padding-top: calc(var(--header-height) + var(--space-3xl));
        padding-bottom: var(--space-3xl);
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0 var(--space-md);
    }
    
    .nav-list {
        gap: var(--space-xs);
    }
    
    .nav-list a:not(.nav-cta) {
        font-size: var(--text-xs);
        padding: var(--space-xs) var(--space-xs);
        min-height: 2.25rem;
    }
    
    .nav-cta {
        min-height: 2.5rem !important;
        min-width: auto !important;
        padding: var(--space-xs) var(--space-sm) !important;
        font-size: var(--text-sm) !important;
    }
    
    .hero-cta,
    .cta-button {
        width: 100%;
        justify-content: center;
    }
}