/* ==================================================
   Profile Card Component - Enhanced Version
   Author: Michael Douglas
   ================================================== */

/* CSS Reset and Base Styles */
@import url('https://fonts.googleapis.com/css2?family=Kumbh+Sans:wght@400;700&display=swap');

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

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors */
    --color-primary-dark-cyan: hsl(185, 75%, 39%);
    --color-neutral-very-dark-blue: hsl(229, 23%, 23%);
    --color-neutral-dark-blue: hsl(227, 10%, 46%);
    --color-neutral-dark-gray: hsl(0, 0%, 59%);
    --color-neutral-light-gray: hsl(0, 0%, 91%);
    --color-neutral-white: hsl(0, 0%, 100%);
    
    /* Typography */
    --font-family-primary: 'Kumbh Sans', sans-serif;
    --font-size-base: 18px;
    --font-size-small: 14px;
    --font-size-medium: 16px;
    --font-size-large: 24px;
    --font-size-xlarge: 32px;
    --font-weight-normal: 400;
    --font-weight-bold: 700;
    --line-height-base: 1.5;
    --line-height-tight: 1.2;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 2.5rem;
    --space-xxl: 3rem;
    --space-xxxl: 4rem;
    
    /* Border radius */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    --border-radius-lg: 1.25rem;
    --border-radius-full: 50%;
    
    /* Shadows */
    --shadow-soft: 0 8px 32px hsla(229, 23%, 23%, 0.1);
    --shadow-hover: 0 12px 48px hsla(229, 23%, 23%, 0.15);
    --shadow-focus: 0 0 0 3px hsla(185, 75%, 39%, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Layout */
    --card-width: 350px;
    --card-padding: var(--space-xl);
    --avatar-size: 96px;
    
    /* Z-index scale */
    --z-background: -1;
    --z-content: 1;
    --z-overlay: 10;
    --z-modal: 100;
    --z-tooltip: 200;
}

/* Accessibility Preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-neutral-white: hsl(229, 23%, 23%);
        --color-neutral-very-dark-blue: hsl(0, 0%, 95%);
        --color-neutral-light-gray: hsl(229, 23%, 30%);
        --shadow-soft: 0 8px 32px hsla(0, 0%, 0%, 0.3);
        --shadow-hover: 0 12px 48px hsla(0, 0%, 0%, 0.4);
    }
}

/* Base Styles */
html {
    font-size: 62.5%; /* 1rem = 10px */
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-neutral-very-dark-blue);
    background-color: var(--color-primary-dark-cyan);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    position: relative;
    overflow-x: hidden;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-neutral-white);
    color: var(--color-neutral-very-dark-blue);
    padding: var(--space-xs) var(--space-sm);
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    border-radius: var(--border-radius-sm);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
    font-size: var(--font-size-small);
}

.skip-link:focus {
    top: 6px;
}

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

/* Background Patterns */
.background-patterns {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    pointer-events: none;
}

.background-patterns__top {
    position: absolute;
    top: -50vh;
    right: -50vw;
    width: 100vw;
    height: 100vh;
    background-image: url('./images/bg-pattern-top.svg');
    background-repeat: no-repeat;
    background-size: contain;
    background-position: top right;
}

.background-patterns__bottom {
    position: absolute;
    bottom: -50vh;
    left: -50vw;
    width: 100vw;
    height: 100vh;
    background-image: url('./images/bg-pattern-bottom.svg');
    background-repeat: no-repeat;
    background-size: contain;
    background-position: bottom left;
}

/* Main Container */
.main-container {
    width: 100%;
    max-width: var(--card-width);
    z-index: var(--z-content);
    margin-bottom: var(--space-lg);
}

/* Profile Card Component */
.profile-card {
    background-color: var(--color-neutral-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    width: 100%;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.profile-card:focus-within {
    box-shadow: var(--shadow-focus);
}

/* Profile Header */
.profile-card__header {
    position: relative;
    height: 140px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: calc(var(--avatar-size) / 2);
}

.profile-card__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

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

/* Avatar */
.profile-card__avatar-container {
    position: relative;
    z-index: var(--z-content);
}

.profile-card__avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: var(--border-radius-full);
    border: 5px solid var(--color-neutral-white);
    display: block;
    transition: transform var(--transition-normal);
}

.profile-card__avatar:hover {
    transform: scale(1.05);
}

/* Profile Content */
.profile-card__content {
    padding: var(--card-padding);
    padding-top: calc(var(--avatar-size) / 2 + var(--space-sm));
    text-align: center;
}

/* Profile Info */
.profile-card__info {
    margin-bottom: var(--space-xl);
}

.profile-card__name {
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral-very-dark-blue);
    margin-bottom: var(--space-xs);
    line-height: var(--line-height-tight);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.profile-card__age {
    font-weight: var(--font-weight-normal);
    color: var(--color-neutral-dark-gray);
    font-size: var(--font-size-large);
}

.profile-card__location {
    font-size: var(--font-size-medium);
    color: var(--color-neutral-dark-gray);
    font-weight: var(--font-weight-normal);
}

/* Statistics */
.profile-card__stats {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-neutral-light-gray);
    gap: var(--space-sm);
}

.profile-card__stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    min-width: 0;
    flex: 1;
    transition: transform var(--transition-fast);
}

.profile-card__stat-item:hover {
    transform: translateY(-2px);
}

.profile-card__stat-number {
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral-very-dark-blue);
    line-height: var(--line-height-tight);
}

.profile-card__stat-label {
    font-size: var(--font-size-small);
    color: var(--color-neutral-dark-gray);
    font-weight: var(--font-weight-normal);
    letter-spacing: 0.1em;
    text-transform: lowercase;
}

/* Attribution */
.attribution {
    font-size: 11px;
    text-align: center;
    color: var(--color-neutral-white);
    margin-top: var(--space-lg);
    padding: var(--space-sm);
    line-height: var(--line-height-base);
}

.attribution a {
    color: var(--color-neutral-white);
    text-decoration: underline;
    font-weight: var(--font-weight-bold);
    transition: opacity var(--transition-fast);
}

.attribution a:hover,
.attribution a:focus {
    opacity: 0.8;
    outline: none;
}

/* Responsive Design */
@media (max-width: 375px) {
    :root {
        --card-padding: var(--space-lg);
        --avatar-size: 80px;
    }
    
    body {
        padding: var(--space-sm);
    }
    
    .profile-card__name {
        font-size: var(--font-size-medium);
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .profile-card__age {
        font-size: var(--font-size-medium);
    }
    
    .profile-card__stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .profile-card__stat-item {
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
        max-width: 200px;
    }
    
    .background-patterns__top,
    .background-patterns__bottom {
        display: none; /* Hide decorative backgrounds on very small screens */
    }
}

@media (min-width: 768px) {
    :root {
        --card-width: 400px;
        --card-padding: var(--space-xxxl);
    }
    
    body {
        padding: var(--space-xl);
    }
    
    .profile-card__header {
        height: 160px;
    }
    
    .profile-card__name {
        font-size: var(--font-size-xlarge);
    }
    
    .profile-card__age {
        font-size: var(--font-size-xlarge);
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .profile-card {
        border: 2px solid var(--color-neutral-very-dark-blue);
    }
    
    .profile-card__avatar {
        border-width: 3px;
    }
    
    .attribution a:focus {
        outline: 2px solid var(--color-neutral-white);
        outline-offset: 2px;
    }
}

/* Print Styles */
@media print {
    .background-patterns,
    .attribution {
        display: none;
    }
    
    .profile-card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* Focus Management */
.profile-card *:focus {
    outline: 2px solid var(--color-primary-dark-cyan);
    outline-offset: 2px;
}

/* Loading States */
.profile-card__avatar[loading="lazy"] {
    background: linear-gradient(90deg, 
        var(--color-neutral-light-gray) 25%, 
        transparent 37%, 
        var(--color-neutral-light-gray) 63%);
    background-size: 400% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

/* Micro-interactions */
.profile-card__stat-item,
.profile-card__avatar {
    cursor: pointer;
}

.profile-card__stat-item:focus {
    outline: 2px solid var(--color-primary-dark-cyan);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}