/* 4skl.com - Modern Landing Page Styles */

:root {
    --background-color: #fff;
    --color-primary: #ccc;
    --color-secondary: #aaa;
    --font-color: #000;
    --font-color-secondary: #333;
    
    --text-light: #fff;
    --text-white: #fff;
    --text-light-gray: #f0f0f0;
    --text-dark: #1a1a1a;
    
    /* Gradient colors */
    --gradient-light-start: #1a4db8;
    --gradient-light-end: #024569;
    --gradient-default-start: #4a5db8;
    --gradient-default-end: #5a3d82;
    
    /* Overlay colors */
    --overlay-light-10: rgba(255,255,255,0.1);
    --overlay-light-15: rgba(255,255,255,0.15);
    --overlay-light-20: rgba(255,255,255,0.2);
    --overlay-light-25: rgba(255,255,255,0.25);
    --overlay-light-30: rgba(255,255,255,0.3);
    --overlay-light-40: rgba(255,255,255,0.4);
    --overlay-light-50: rgba(255,255,255,0.5);
    --overlay-light-80: rgba(255,255,255,0.8);
    --overlay-light-90: rgba(255,255,255,0.9);
    --overlay-light-95: rgba(255,255,255,0.95);
    
    /* Shadows */
    --shadow-dark-10: rgba(0,0,0,0.10);
    --shadow-dark-18: rgba(0,0,0,0.18);
    --shadow-dark-20: rgba(0,0,0,0.2);
    --shadow-dark-30: rgba(0,0,0,0.3);
    --shadow-white: rgba(255,255,255,1);
    
    /* Focus and interaction */
    --focus-color: #4a90e2;
    --focus-shadow: 0 0 0 3px rgba(74, 144, 226, 0.5);
    
    --toggle-bg: #000;
    --toggle-slider-bg: #fff;
    --white-glow: 0 0 8px 0 rgba(0, 0, 0, 0.7);
}

.dark-theme {
    --background-color: #222;
    --color-primary: #444;
    --color-secondary: #666;
    --font-color: #fff;
    --font-color-secondary: #e0e0e0;
    
    --text-white: #fff;
    --text-light-gray: #b0b0b0;
    --text-dark: #f5f5f5;
    
    --gradient-light-start: #2c3e50;
    --gradient-light-end: #34495e;
    --gradient-default-start: #2c3e50;
    --gradient-default-end: #34495e;
    
    --focus-color: #60a5fa;
    --focus-shadow: 0 0 0 3px rgba(96, 165, 250, 0.5);
    
    --overlay-dark-80: rgba(0, 0, 0, 0.8);
    --toggle-bg: #333;
    --toggle-slider-bg: #fff;
    --white-glow: 0px 0px 8px rgba(96, 165, 250, 0.3);
}

/* Layout */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.site-controls {
    position: relative;
    z-index: 1000;
}

.description {
    color: var(--text-light-gray);
    font-size: 1rem;
}

.service-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

/* Accessibility */
.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;
}

*:focus-visible {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
    box-shadow: var(--focus-shadow);
}

*:focus {
    outline: none;
}

button:focus-visible,
[role="button"]:focus-visible,
[role="switch"]:focus-visible,
a:focus-visible {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
    box-shadow: var(--focus-shadow);
}

body {
    font-family: 'Acme', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background: linear-gradient(135deg, var(--gradient-default-start) 0%, var(--gradient-default-end) 100%);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Site navigation controls */
.site-controls {
    position: relative;
    z-index: 1000;
}

.dark-theme body {
    background: linear-gradient(135deg, var(--gradient-default-start) 0%, var(--gradient-default-end) 100%);
}

/* Light theme specific styles */
html:not(.dark-theme) body {
    color: var(--text-light);
    background: linear-gradient(135deg, var(--gradient-light-start) 0%, var(--gradient-light-end) 100%);
}

html:not(.dark-theme) .card {
    background: var(--overlay-light-20);
    border: 1px solid var(--overlay-light-30);
}

html:not(.dark-theme) .card h2 {
    color: var(--text-white);
}

html:not(.dark-theme) .card p {
    color: var(--overlay-light-90);
}

html:not(.dark-theme) .services-list li {
    color: var(--overlay-light-95);
}

html:not(.dark-theme) .contact-item {
    background: var(--overlay-light-15);
}

html:not(.dark-theme) .contact-item:hover {
    background: var(--overlay-light-25);
}

html:not(.dark-theme) .project-card {
    background: var(--overlay-light-15);
}

html:not(.dark-theme) .blog-card {
    background: var(--overlay-light-20);
    border: 2px solid var(--overlay-light-30);
}

html:not(.dark-theme) .blog-card:hover {
    border-color: var(--overlay-light-50);
}

html:not(.dark-theme) .social-link {
    background: var(--overlay-light-15);
    border: 1px solid var(--overlay-light-30);
}

html:not(.dark-theme) .social-link:hover {
    background: var(--overlay-light-25);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.logo {
    font-size: 3rem;
    font-weight: bold;
    color: var(--text-white);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px var(--shadow-dark-30);
}

.tagline {
    font-size: 1.2rem;
    color: var(--overlay-light-90);
    margin-bottom: 2rem;
}

.main-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

.card {
    background: var(--overlay-light-10);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid var(--overlay-light-20);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}



.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-dark-20);
}

.card h2 {
    color: var(--text-white);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card p {
    color: var(--overlay-light-80);
    margin-bottom: 1rem;
}
.card.contact-card {
    grid-column: span 2;
    min-width: 0;
}

.services-list {
    list-style: none;
    margin: 1rem 0;
}

.services-list li {
    color: var(--overlay-light-90);
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.services-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    font-weight: bold;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.contact-item {
    background: var(--overlay-light-10);
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    transition: background 0.3s ease, transform 0.2s cubic-bezier(.4,2,.6,1);
}

.contact-item:hover {
    background: var(--overlay-light-20);
    transform: scale(1.08);
    box-shadow: 0 8px 24px 0 var(--shadow-dark-18), 0 1.5px 6px 0 var(--shadow-dark-10);
}

.contact-item a {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.blog-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1rem;
}

.blog-description h3 {
    color: var(--text-white);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.blog-cta {
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-link {
    text-decoration: none;
    color: inherit;
    width: 100%;
}

.blog-card {
    background: var(--overlay-light-15);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid var(--overlay-light-20);
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--overlay-light-10), transparent);
    transition: left 0.5s;
}

.blog-card:hover::before {
    left: 100%;
}

.blog-card:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 40px var(--shadow-dark-30);
    border-color: var(--overlay-light-40);
}

.blog-card h3 {
    color: var(--text-white);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.blog-card p {
    color: var(--overlay-light-80);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.blog-arrow {
    display: inline-block;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.blog-card:hover .blog-arrow {
    transform: translateX(10px);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.social-link {
    background: var(--overlay-light-10);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--overlay-light-20);
}

.social-link:hover {
    background: var(--overlay-light-20);
    transform: scale(1.05);
}

.footer-text {
    text-align: center;
    color: var(--overlay-light-80);
    margin-top: 2rem;
}

.darkmode-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    width: 50px;
    height: 50px;
    margin: 0 auto;
    border-radius: 40px;
    transition: transform 0.2s cubic-bezier(.4,2,.6,1), opacity 0.3s ease;
}

.darkmode-toggle:hover {
    transform: scale(1.12);
    box-shadow: 0 8px 24px 0 var(--shadow-dark-18), 0 1.5px 6px 0 var(--shadow-dark-10);
}

.language-toggle {
    position: fixed;
    top: 2rem;
    left: calc(50% - 450px + 2rem);
    z-index: 1000;
    transition: opacity 0.3s ease;
    left: 2rem;
}

.language-toggle button {
    background: transparent;
    color: var(--text-dark);
    border-radius: 25px;
    padding: 0em 0.5em;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 1.5rem;
    line-height: 2;
    box-shadow: none;
    transition: all 0.3s ease, transform 0.2s cubic-bezier(.4,2,.6,1);
}

.dark-theme .language-toggle button {
    background: var(--overlay-dark-80);
    color: var(--text-white);
}

.language-toggle button:hover {
    background: var(--overlay-light-30);
    transform: scale(1.12);
    box-shadow: 0 8px 24px 0 var(--shadow-dark-18), 0 1.5px 6px 0 var(--shadow-dark-10);
}


.darkmode-toggle > input[type="checkbox"] {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    margin: 0px;
    cursor: pointer;
    opacity: 0;
    z-index: 2;
}

.darkmode-toggle > span.toggle-slider {
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    overflow: hidden;
    opacity: 1;
    background-color: var(--toggle-slider-bg);
    border-radius: 40px;
    transition: 0.2s ease background-color, 0.2s ease opacity;
    cursor: pointer;
}

.darkmode-toggle > span.toggle-slider:before,
.darkmode-toggle > span.toggle-slider:after {
    content: '';
    position: absolute;
    top: 5px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: 0.2s ease transform, 0.2s ease background-color;
}

.darkmode-toggle > span.toggle-slider:before {
    background-color: var(--toggle-slider-bg);
    transform: translate(-100px, 0px);
    z-index: 1;
}

.darkmode-toggle > span.toggle-slider:after {
    background-color: var(--toggle-slider-bg);
    transform: translate(5px, 0px);
    box-shadow: var(--white-glow);
    z-index: 0;
}

.darkmode-toggle > input[type="checkbox"]:checked + span.toggle-slider {
    background-color: var(--toggle-bg);
}

.darkmode-toggle > input[type="checkbox"]:active + span.toggle-slider {
    opacity: 0.5;
}

.darkmode-toggle > input[type="checkbox"]:checked + span.toggle-slider:before {
    background-color: var(--background-color);
    transform: translate(-7px, 0px);
    box-shadow: var(--white-glow);
}

/* Tooltip for dark mode toggle */
.darkmode-toggle::after {
    content: attr(data-tooltip);
    position: absolute;
    top: 50%;
    right: 60px;
    transform: translateY(-50%);
    background: var(--overlay-dark-80);
    color: var(--text-white);
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    pointer-events: none;
}

.darkmode-toggle:hover::after {
    opacity: 1;
    visibility: visible;
}

.dark-theme .darkmode-toggle::after {
    background: var(--overlay-dark-80);
    color: var(--text-white);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header {
        margin-bottom: 2rem;
        margin-top: 3rem;
    }
    
    .darkmode-toggle {
        top: 1rem;
        right: 1rem;
    }
    
    .language-toggle {
        top: 1rem;
        left: 1rem;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .main-content {
        grid-template-columns: 1fr;
    }

    .card.contact-card {
        grid-column: span 1;
    }
    
    .social-links {
        flex-direction: row;
        align-items: center;
    }
    
    .blog-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .blog-card {
        padding: 1.5rem;
    }
}