/* Import color palette from styles.js */
:root {
    /* Primary Colors */
    --color-primary-50: #f7f8f5;
    --color-primary-100: #eef1ea;
    --color-primary-200: #dde3d5;
    --color-primary-300: #c2ccb3;
    --color-primary-400: #a3b08c;
    --color-primary-500: #6c7e58;
    --color-primary-600: #5f6f4e;
    --color-primary-700: #4f5b41;
    --color-primary-800: #424a36;
    --color-primary-900: #373d2e;
    
    /* Secondary Colors */
    --color-secondary-50: #f5f7f8;
    --color-secondary-100: #eaf0f1;
    --color-secondary-200: #d5e0e3;
    --color-secondary-300: #b3c5cc;
    --color-secondary-400: #8ca8b0;
    --color-secondary-500: #587c7e;
    --color-secondary-600: #4e6f6f;
    --color-secondary-700: #415b5b;
    --color-secondary-800: #364a4a;
    --color-secondary-900: #2e3d3d;
    
    /* Accent Colors */
    --color-accent-50: #f8f5f7;
    --color-accent-100: #f1eaf0;
    --color-accent-200: #e3d5e0;
    --color-accent-300: #ccb3c5;
    --color-accent-400: #b08ca8;
    --color-accent-500: #7e587c;
    --color-accent-600: #6f4e6f;
    --color-accent-700: #5b415b;
    --color-accent-800: #4a364a;
    --color-accent-900: #3d2e3d;
    
    /* Neutral Colors */
    --color-neutral-50: #fafafa;
    --color-neutral-100: #f5f5f5;
    --color-neutral-200: #e5e5e5;
    --color-neutral-300: #d4d4d4;
    --color-neutral-400: #a3a3a3;
    --color-neutral-500: #737373;
    --color-neutral-600: #525252;
    --color-neutral-700: #404040;
    --color-neutral-800: #262626;
    --color-neutral-900: #171717;
    
    /* Semantic Colors */
    --color-success-50: #f0fdf4;
    --color-success-100: #dcfce7;
    --color-success-200: #bbf7d0;
    --color-success-300: #86efac;
    --color-success-400: #4ade80;
    --color-success-500: #22c55e;
    --color-success-600: #16a34a;
    --color-success-700: #15803d;
    --color-success-800: #166534;
    --color-success-900: #14532d;
    
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-200: #fde68a;
    --color-warning-300: #fcd34d;
    --color-warning-400: #fbbf24;
    --color-warning-500: #f59e0b;
    --color-warning-600: #d97706;
    --color-warning-700: #b45309;
    --color-warning-800: #92400e;
    --color-warning-900: #78350f;
    
    --color-error-50: #fef2f2;
    --color-error-100: #fee2e2;
    --color-error-200: #fecaca;
    --color-error-300: #fca5a5;
    --color-error-400: #f87171;
    --color-error-500: #ef4444;
    --color-error-600: #dc2626;
    --color-error-700: #b91c1c;
    --color-error-800: #991b1b;
    --color-error-900: #7f1d1d;
    
    --color-info-50: #eff6ff;
    --color-info-100: #dbeafe;
    --color-info-200: #bfdbfe;
    --color-info-300: #93c5fd;
    --color-info-400: #60a5fa;
    --color-info-500: #3b82f6;
    --color-info-600: #2563eb;
    --color-info-700: #1d4ed8;
    --color-info-800: #1e40af;
    --color-info-900: #1e3a8a;
    
    /* Background Colors */
    --color-background-primary: #ffffff;
    --color-background-secondary: #f8f9fa;
    --color-background-tertiary: #f1f3f4;
    --color-background-dark: #1a1a1a;
    --color-background-dark-secondary: #2d2d2d;
    
    /* Surface Colors */
    --color-surface-primary: #ffffff;
    --color-surface-secondary: #f8f9fa;
    --color-surface-tertiary: #f1f3f4;
    --color-surface-elevated: #ffffff;
    --color-surface-overlay: rgba(0, 0, 0, 0.5);
    
    /* Text Colors - Accessibility Improved */
    --color-text-primary: #1a1a1a;          /* Dark gray - excellent contrast on white */
    --color-text-secondary: #404040;        /* Improved from #525252 for better contrast */
    --color-text-tertiary: #525252;         /* Improved from #737373 for better contrast */
    --color-text-disabled: #a3a3a3;         /* Good for disabled state */
    --color-text-inverse: #ffffff;          /* White text on dark backgrounds */
    --color-text-link: #5f6f4e;             /* Improved from #6c7e58 for better contrast */
    --color-text-link-hover: #4f5b41;       /* Darker hover state for better contrast */
    
    /* Border Colors - Accessibility Improved */
    --color-border-primary: #d4d4d4;        /* Improved from #e5e5e5 for better visibility */
    --color-border-secondary: #a3a3a3;      /* Improved from #d4d4d4 for better contrast */
    --color-border-tertiary: #737373;       /* Improved from #a3a3a3 for better contrast */
    --color-border-focus: #5f6f4e;          /* Improved from #6c7e58 for better contrast */
    --color-border-error: #dc2626;          /* Improved from #ef4444 for better contrast */
    --color-border-success: #16a34a;        /* Improved from #22c55e for better contrast */
    
    /* Shadow Colors */
    --color-shadow-sm: rgba(0, 0, 0, 0.05);
    --color-shadow-md: rgba(0, 0, 0, 0.1);
    --color-shadow-lg: rgba(0, 0, 0, 0.15);
    --color-shadow-xl: rgba(0, 0, 0, 0.25);

    /* Screen Size Detection Variables */
    --screen-width: 100vw;
    --screen-height: 100vh;
    --screen-aspect-ratio: calc(var(--screen-width) / var(--screen-height));
    --screen-density: 1; /* Will be set by JavaScript */
    --screen-pixel-ratio: 1; /* Will be set by JavaScript */

    /* Dynamic Sizing Variables - Mobile First (xs) */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */

    --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 */

    --border-radius-sm: 0.375rem;  /* 6px */
    --border-radius-md: 0.5rem;    /* 8px */
    --border-radius-lg: 0.75rem;   /* 12px */
    --border-radius-xl: 1rem;      /* 16px */
    --border-radius-2xl: 1.5rem;   /* 24px */

    /* Dynamic Container Sizing Based on Screen */
    --container-padding: var(--spacing-md);
    --container-max-width: calc(100vw - 2rem);
    --container-border-radius: var(--border-radius-lg);
}

/* Responsive Breakpoints with Screen Awareness */

/* sm: Small tablets / large phones (landscape) - 640px */
@media (min-width: 640px) {
    :root {
        --container-padding: var(--spacing-lg);
        --container-max-width: min(640px, calc(100vw - 3rem));
        --container-border-radius: var(--border-radius-xl);
        --font-size-3xl: 2.25rem; /* 36px */
        --font-size-4xl: 3rem;    /* 48px */
    }
}

/* md: Tablets (iPad portrait) - 768px */
@media (min-width: 768px) {
    :root {
        --container-padding: var(--spacing-xl);
        --container-max-width: min(768px, calc(100vw - 4rem));
        --spacing-xl: 2.5rem;      /* 40px */
        --spacing-2xl: 4rem;       /* 64px */
        --spacing-3xl: 6rem;       /* 96px */
    }
}

/* lg: Laptops / iPad landscape - 1024px */
@media (min-width: 1024px) {
    :root {
        --container-max-width: min(1024px, calc(100vw - 5rem));
        --font-size-3xl: 2.5rem;   /* 40px */
        --font-size-4xl: 3.5rem;   /* 56px */
    }
}

/* xl: Desktops - 1280px */
@media (min-width: 1280px) {
    :root {
        --container-max-width: min(1280px, calc(100vw - 6rem));
        --spacing-3xl: 8rem;       /* 128px */
        --font-size-4xl: 4rem;     /* 64px */
    }
}

/* 2xl: Large desktops / high-res monitors - 1536px */
@media (min-width: 1536px) {
    :root {
        --container-max-width: min(1536px, calc(100vw - 8rem));
        --spacing-3xl: 10rem;      /* 160px */
        --font-size-4xl: 4.5rem;   /* 72px */
    }
}

/* High DPI Display Adjustments */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    :root {
        --screen-density: 2;
        --screen-pixel-ratio: 2;
    }
}

@media (-webkit-min-device-pixel-ratio: 3), (min-resolution: 288dpi) {
    :root {
        --screen-density: 3;
        --screen-pixel-ratio: 3;
    }
}

/* Ultra-wide Screen Adjustments */
@media (min-aspect-ratio: 21/9) {
    :root {
        --container-max-width: min(1600px, calc(100vw - 10rem));
    }
}

/* Portrait Orientation Adjustments */
@media (orientation: portrait) and (min-height: 800px) {
    :root {
        --container-max-width: min(600px, calc(100vw - 2rem));
    }
}

/* Landscape Orientation Adjustments */
@media (orientation: landscape) and (max-height: 600px) {
    :root {
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2.5rem;
        --spacing-3xl: 4rem;
    }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--color-background-secondary) 0%, var(--color-background-tertiary) 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    overflow-x: hidden; /* Prevent horizontal scroll */
    width: 100%;
    max-width: 100vw;
}

/* Accessibility - Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary-600);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: top 0.3s;
}

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

/* Focus indicators for better accessibility */
*:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Remove focus outline for mouse users, keep for keyboard */
*:focus:not(:focus-visible) {
    outline: none;
}

/* Ensure focus is visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Container - Screen Aware */
.container {
    max-width: var(--container-max-width);
    width: 100%;
    margin: 0 auto;
    background: var(--color-surface-primary);
    border-radius: var(--container-border-radius);
    box-shadow: 0 10px 25px var(--color-shadow-lg);
    overflow: hidden;
    position: relative;
}

/* Header - Screen Aware */
.header {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
    color: var(--color-text-inverse);
    padding: var(--spacing-md) var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100%;
}

.header-content {
    position: relative;
    z-index: 2;
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: left;
}

.logo {
    font-size: var(--font-size-4xl);
    margin-bottom: 0;
    opacity: 0.9;
    flex-shrink: 0;
}

.logo-svg {
    width: 80px;
    height: 80px;
    margin-bottom: 0;
    filter: drop-shadow(0 4px 8px var(--color-shadow-md));
}

.header-text {
    flex: 1;
}

/* Responsive logo sizing */
@media (min-width: 640px) {
    .logo-svg {
        width: 100px;
        height: 100px;
    }
}

@media (min-width: 768px) {
    .logo-svg {
        width: 100px;
        height: 100px;
    }
}

@media (min-width: 1024px) {
    .logo-svg {
        width: 100px;
        height: 100px;
    }
}

.header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px var(--color-shadow-md);
    line-height: 1.2;
}

.header p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
}

/* Header Decoration - Screen Aware */
.header-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.decoration-circle:nth-child(1) {
    width: 40px;
    height: 40px;
    top: 20%;
    left: 10%;
}

.decoration-circle:nth-child(2) {
    width: 30px;
    height: 30px;
    top: 60%;
    right: 15%;
}

.decoration-circle:nth-child(3) {
    width: 50px;
    height: 50px;
    bottom: 20%;
    left: 20%;
}

.decoration-circle:nth-child(4) {
    width: 25px;
    height: 25px;
    top: 40%;
    right: 5%;
}

.decoration-circle:nth-child(5) {
    width: 35px;
    height: 35px;
    top: 80%;
    left: 5%;
}

.decoration-circle:nth-child(6) {
    width: 20px;
    height: 20px;
    top: 10%;
    right: 25%;
}

/* Main Content - Screen Aware */
.main-content {
    padding: var(--container-padding);
    width: 100%;
    max-width: 100%;
}

/* Welcome Section - Screen Aware */
.welcome-section {
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
    border: 2px solid var(--color-primary-200);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 100%;
}

.welcome-content {
    padding: var(--spacing-lg);
    width: 100%;
}

.welcome-icon {
    font-size: var(--font-size-4xl);
    color: var(--color-primary-600);
    margin-bottom: var(--spacing-md);
}

.welcome-section h2 {
    color: var(--color-primary-700);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.welcome-section p {
    color: var(--color-primary-600);
    font-size: var(--font-size-base);
    max-width: min(100%, calc(100vw * 0.8));
    margin: 0 auto;
    line-height: 1.6;
}

/* Section Styles - Screen Aware */
.section {
    background: var(--color-surface-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--color-border-primary);
    position: relative;
    width: 100%;
    max-width: 100%;
}

/* Section Header - Screen Aware */
.section-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    width: 100%;
}

.section-icon {
    font-size: var(--font-size-xl);
    color: var(--color-primary-600);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-100);
    border-radius: var(--border-radius-md);
}

.section h2 {
    color: var(--color-primary-700);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
    line-height: 1.3;
}

.section-badge {
    background: var(--color-accent-500);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    align-self: flex-start;
}

.section-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* Form Elements - Accessibility Improved */
.form-group {
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-weight: 600; /* Increased for better readability */
    font-size: var(--font-size-sm);
    width: 100%;
}

.form-group label i {
    color: var(--color-primary-700); /* Improved contrast */
}

/* Input Wrapper - Accessibility Improved */
.input-wrapper {
    position: relative;
    width: 100%;
}

input[type="text"] {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: 3rem;
    border: 2px solid var(--color-border-primary);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    background: var(--color-surface-primary);
    color: var(--color-text-primary);
    line-height: 1.5;
    box-sizing: border-box;
    font-weight: 500; /* Added for better readability */
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

input[type="text"]::placeholder {
    color: var(--color-text-tertiary);
    font-weight: 400;
}

.input-decoration {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-primary-600); /* Improved contrast */
    font-size: var(--font-size-lg);
    pointer-events: none;
}

input[type="text"]:focus + .input-decoration {
    color: var(--color-primary-700); /* Improved contrast */
}

/* Character Counter - Accessibility Improved */
.char-counter {
    text-align: right;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
    font-weight: 500; /* Added for better readability */
}

/* Button Styles - Accessibility Improved */
.btn {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
    color: var(--color-text-inverse);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600; /* Increased from 500 for better readability */
    cursor: pointer;
    box-shadow: 0 4px 12px var(--color-shadow-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
    min-height: 44px; /* Touch target size */
    width: 100%;
    box-sizing: border-box;
    transition: all 0.2s ease;
}

.btn:hover {
    background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-primary-800) 100%);
    box-shadow: 0 8px 20px var(--color-shadow-md);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px var(--color-shadow-sm);
}

.btn:focus-visible {
    outline: 3px solid var(--color-primary-400);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--color-primary-100);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary-600) 0%, var(--color-secondary-700) 100%);
    color: var(--color-text-inverse);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--color-secondary-700) 0%, var(--color-secondary-800) 100%);
}

/* Result Display - Accessibility Improved */
.result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary-600);
    background: var(--color-primary-50);
    color: var(--color-primary-900); /* Improved contrast */
    font-weight: 600; /* Increased for better readability */
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    width: 100%;
    box-sizing: border-box;
}

.result.success {
    border-left-color: var(--color-success-700);
    background: var(--color-success-50);
    color: var(--color-success-900); /* Improved contrast */
}

.result.error {
    border-left-color: var(--color-error-700);
    background: var(--color-error-50);
    color: var(--color-error-900); /* Improved contrast */
}

.result.info {
    border-left-color: var(--color-info-700);
    background: var(--color-info-50);
    color: var(--color-info-900); /* Improved contrast */
}

/* Features Section - Screen Aware */
.features-section {
    background: linear-gradient(135deg, var(--color-neutral-50) 0%, var(--color-neutral-100) 100%);
    text-align: center;
    width: 100%;
}

.features-section h2 {
    color: var(--color-primary-700);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    line-height: 1.3;
}

.features-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    width: 100%;
}

.feature-card {
    background: var(--color-surface-primary);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border-primary);
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
    transform: scaleX(0);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card-hover {
    box-shadow: 0 10px 30px var(--color-shadow-md);
}

.feature-icon {
    font-size: var(--font-size-3xl);
    color: var(--color-primary-600);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    color: var(--color-primary-700);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    line-height: 1.3;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* Footer - Screen Aware */
.footer {
    background: linear-gradient(135deg, var(--color-primary-800) 0%, var(--color-primary-900) 100%);
    color: var(--color-text-inverse);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    width: 100%;
}

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

.footer-content p {
    opacity: 0.9;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.footer-content .fa-heart {
    color: var(--color-error-400);
}

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

.footer-link {
    color: var(--color-text-inverse);
    text-decoration: none;
    opacity: 0.8;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
}

.footer-link:hover {
    opacity: 1;
    color: var(--color-primary-200);
    background: rgba(255, 255, 255, 0.1);
}

/* Loading State - Screen Aware */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-primary-200);
    border-radius: 50%;
    border-top-color: var(--color-primary-500);
    margin-right: var(--spacing-sm);
}

/* Responsive Styles with Screen Awareness */

/* sm: Small tablets / large phones (landscape) - 640px */
@media (min-width: 640px) {
    body {
        padding: var(--spacing-lg);
    }

    .header h1 {
        font-size: var(--font-size-4xl);
    }

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

    .main-content {
        padding: var(--spacing-lg);
    }

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

    .section-header {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-md);
    }

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

    .btn {
        width: auto;
        min-width: 120px;
    }

    .features-grid {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }

    .features-grid .feature-card {
        flex: 1 1 calc(50% - var(--spacing-xl));
        min-width: 250px;
    }

    .footer-links {
        flex-direction: row;
        gap: var(--spacing-lg);
    }
}

/* md: Tablets (iPad portrait) - 768px */
@media (min-width: 768px) {
    .container {
        box-shadow: 0 20px 40px var(--color-shadow-lg);
    }

    .header h1 {
        font-size: var(--font-size-4xl);
    }

    .welcome-section h2 {
        font-size: var(--font-size-3xl);
    }

    .welcome-section p {
        font-size: var(--font-size-lg);
        max-width: min(600px, calc(100vw * 0.6));
    }

    .section-header {
        margin-bottom: var(--spacing-lg);
    }

    .section-description {
        font-size: var(--font-size-base);
    }

    .features-grid .feature-card {
        flex: 1 1 calc(33.333% - var(--spacing-xl));
        min-width: 200px;
    }

    .feature-card {
        padding: var(--spacing-2xl) var(--spacing-xl);
    }

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

    .feature-card p {
        font-size: var(--font-size-base);
    }
}

/* lg: Laptops / iPad landscape - 1024px */
@media (min-width: 1024px) {

    .main-content {
        padding: var(--spacing-xl);
    }

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

    .welcome-content {
        padding: var(--spacing-2xl);
    }

    .welcome-section p {
        max-width: min(800px, calc(100vw * 0.5));
    }
}

/* xl: Desktops - 1280px */
@media (min-width: 1280px) {
    .main-content {
        padding: var(--spacing-2xl);
    }

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

    .welcome-content {
        padding: var(--spacing-3xl);
    }

    .welcome-section p {
        max-width: min(900px, calc(100vw * 0.45));
    }
}

/* 2xl: Large desktops / high-res monitors - 1536px */
@media (min-width: 1536px) {
    .main-content {
        padding: var(--spacing-2xl);
    }

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

    .welcome-content {
        padding: var(--spacing-3xl);
    }

    .welcome-section p {
        max-width: min(1000px, calc(100vw * 0.4));
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.gap-2 {
    gap: var(--spacing-md);
}

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

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

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

/* List Building Styles */

/* List Stats - Accessibility Improved */
.list-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-primary-50);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-primary-200);
    width: 100%;
    box-sizing: border-box;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary-800); /* Improved contrast */
    font-size: var(--font-size-sm);
    font-weight: 600; /* Increased for better readability */
}

.stat-item i {
    color: var(--color-primary-700); /* Improved contrast */
    font-size: var(--font-size-base);
}

/* List Container */
.list-container {
    width: 100%;
    min-height: 200px;
    margin-bottom: var(--spacing-lg);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    color: var(--color-text-tertiary);
    width: 100%;
}

.empty-state i {
    font-size: var(--font-size-4xl);
    color: var(--color-neutral-400);
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.empty-state p {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-base);
    line-height: 1.5;
}

/* List Items */
.list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--color-surface-primary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--border-radius-lg);
    transition: all 0.2s ease;
    width: 100%;
    box-sizing: border-box;
}

.list-item:hover {
    border-color: var(--color-primary-300);
    box-shadow: 0 2px 8px var(--color-shadow-sm);
}

.list-item.completed {
    background: var(--color-success-50);
    border-color: var(--color-success-200);
    opacity: 0.8;
}

.list-item.completed .item-text {
    text-decoration: line-through;
    color: var(--color-text-tertiary);
}

.item-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 0;
}

/* Check Button */
.check-btn {
    background: none;
    border: 2px solid var(--color-border-primary);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    color: var(--color-text-tertiary);
    min-width: 24px;
    min-height: 24px;
}

.check-btn:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-500);
    transform: scale(1.1);
}

.check-btn:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
    border-color: var(--color-primary-500);
}

.check-btn.checked {
    background: var(--color-success-500);
    border-color: var(--color-success-500);
    color: white;
}

.check-btn.checked:hover {
    background: var(--color-success-600);
    border-color: var(--color-success-600);
}

.check-btn.checked:focus-visible {
    outline: 2px solid var(--color-success-600);
    outline-offset: 2px;
}

.check-btn i {
    font-size: var(--font-size-sm);
}

/* Item Text */
.item-text {
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
    flex: 1;
    min-width: 0;
}

/* Links within item text */
.item-text a {
    color: var(--color-primary-600);
    text-decoration: underline;
    word-break: break-all;
    transition: all 0.2s ease;
}

.item-text a:hover {
    color: var(--color-primary-700);
    text-decoration: none;
    background: var(--color-primary-50);
    padding: 2px 4px;
    border-radius: var(--border-radius-sm);
}

.item-text a:focus {
    outline: 2px solid var(--color-primary-400);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* Delete Button */
.delete-btn {
    background: none;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all 0.2s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
}

.delete-btn:hover {
    background: var(--color-error-50);
    color: var(--color-error-500);
    transform: scale(1.1);
}

.delete-btn:focus-visible {
    outline: 2px solid var(--color-error-500);
    outline-offset: 2px;
    background: var(--color-error-50);
    color: var(--color-error-500);
}

.delete-btn i {
    font-size: var(--font-size-sm);
}

/* List Actions */
.list-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: space-between;
    flex-wrap: wrap;
    width: 100%;
}

.list-actions .btn {
    min-width: 140px;
}

/* Left side buttons container */
.list-actions-left {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Right side share button container */
.list-actions-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-sm);
    position: relative;
    min-height: 44px; /* Match button height */
}

/* Share message positioning */
.share-success-message {
    position: absolute;
    bottom: 100%;
    right: 0;
    width: 300px;
    max-width: calc(100vw - 2rem);
    margin-bottom: var(--spacing-sm);
    z-index: 10;
    white-space: normal;
    word-wrap: break-word;
}

/* Share button special styling */
#share-list-btn {
    background: linear-gradient(135deg, var(--color-accent-500) 0%, var(--color-accent-600) 100%);
    border: 2px solid var(--color-accent-400);
}

#share-list-btn:hover {
    background: linear-gradient(135deg, var(--color-accent-600) 0%, var(--color-accent-700) 100%);
    border-color: var(--color-accent-500);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--color-shadow-md);
}

/* Responsive adjustments for list items */
@media (min-width: 640px) {
    .list-stats {
        justify-content: center;
    }

    .check-btn {
        width: 28px;
        height: 28px;
    }
    
    .check-btn i {
        font-size: var(--font-size-base);
    }
    
    .delete-btn {
        width: 36px;
        height: 36px;
    }
    
    .delete-btn i {
        font-size: var(--font-size-base);
    }
}

/* Mobile layout - stack vertically */
@media (max-width: 767px) {
    .list-actions {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .list-actions-left {
        justify-content: center;
    }
    
    .list-actions-right {
        align-items: center;
    }
}

@media (min-width: 768px) {
    .list-actions {
        justify-content: space-between;
    }
    
    .list-actions-left {
        justify-content: flex-start;
    }
    
    .list-actions-right {
        align-items: flex-end;
    }
    
    .item-content {
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .list-container {
        min-height: 300px;
    }
    
    .empty-state {
        padding: var(--spacing-3xl) var(--spacing-2xl);
    }
}