/* Base variables */
:root {
    --primary: #46a9ff;      /* sky blue */
    --primary-dark: #1f6fb5;
    --background: #ffffff;
    --background-alt: #f5f9ff;
    --text: #111111;
    --text-muted: #555555;
    --border: #e0e6f0;
    --black: #000000;
    --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.08);
    --transition-fast: 0.2s ease;
    --transition-med: 0.35s ease;
    --radius: 8px;
    --radius-pill: 999px;
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Dark mode overrides */
body.dark-mode {
    --background: #05070b;
    --background-alt: #0f1724;
    --text: #f5f7ff;
    --text-muted: #a9b3c7;
    --border: #1f2937;
    --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.6);
}

/* Global styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-main);
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    transition: background-color var(--transition-med), color var(--transition-med);
}

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

a {
    color: var(--primary-dark);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Header */
.site-header {
    background: var(--background);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

/* Logo area */
.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft);
}

.logo-text {
    color: #ffffff;
    font-weight: 700;
    font-size: 1.1rem;
}

.brand-text h1 {
    margin: 0;
    font-size: 1.4rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.slogan {
    margin: 0;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
}

/* Header controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Theme toggle */
.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    gap: 0.35rem;
}

.theme-toggle input {
    display: none;
}

.toggle-slider {
    width: 40px;
    height: 20px;
    border-radius: 999px;
    background: var(--border);
    position: relative;
    transition: background-color var(--transition-fast);
}

.toggle-slider::before {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #ffffff;
    top: 2px;
    left: 2px;
    transition: transform var(--transition-fast);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.theme-toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.theme-toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Navigation */
.main-nav {
    margin-left: auto;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    text-decoration: none;
    position: relative;
    padding: 0.35rem 0;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Hover underline */
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-med);
}

.main-nav a:hover::after {
    width: 100%;
}

/* Dropdown */
.has-dropdown {
    position: relative;
}

.has-dropdown > a i {
    font-size: 0.7rem;
    margin-left: 0.25rem;
}

.dropdown {
    position: absolute;
    top: 120%;
    left: 0;
    min-width: 220px;
    background: var(--background);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--transition-med), transform var(--transition-med), visibility var(--transition-med);
    z-index: 999;
}

.dropdown li {
    padding: 0;
}

.dropdown a {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
}

.dropdown a:hover {
    background: var(--background-alt);
}

/* Smooth dropdown on hover (desktop) */
.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Hamburger (mobile) */
.nav-toggle {
    display: none;
}

.hamburger {
    display: none;
    width: 32px;
    height: 24px;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}

.hamburger span {
    display: block;
    height: 3px;
    border-radius: 999px;
    background: var(--black);
    transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

/* HERO SLIDER */
.hero-slider {
    width: 100%;
    overflow: hidden;
    position: relative;
    height: 320px;
}

.slider-wrapper {
    display: flex;
    width: 400%; /* 4 slides = 400% */
    height: 100%;
    animation: slideShow 20s infinite;
}

.slide {
    width: 100%;
    height: 100%;
    flex-shrink: 0;
    position: relative;
    color: #fff;
    display: flex;
    align-items: center;
    padding: 2rem;
}

.slide::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
}

.slide-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

/* Background images */
.slide-1 { background: url("https://images.pexels.com/photos/3951628/pexels-photo-3951628.jpeg?auto=compress&cs=tinysrgb&w=1200") center/cover; }
.slide-2 { background: url("https://images.pexels.com/photos/1181675/pexels-photo-1181675.jpeg?auto=compress&cs=tinysrgb&w=1200") center/cover; }
.slide-3 { background: url("https://images.pexels.com/photos/2706379/pexels-photo-2706379.jpeg?auto=compress&cs=tinysrgb&w=1200") center/cover; }
.slide-4 { background: url("https://images.pexels.com/photos/1181467/pexels-photo-1181467.jpeg?auto=compress&cs=tinysrgb&w=1200") center/cover; }

/* FIXED KEYFRAMES */
@keyframes slideShow {
    0%   { transform: translateX(0); }
    20%  { transform: translateX(0); }

    25%  { transform: translateX(-100%); }
    45%  { transform: translateX(-100%); }

    50%  { transform: translateX(-200%); }
    70%  { transform: translateX(-200%); }

    75%  { transform: translateX(-300%); }
    95%  { transform: translateX(-300%); }

    100% { transform: translateX(0); }
}

/* Main layout */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem 3rem;
}

/* Sections */
.applications-section {
    margin-bottom: 3rem;
}

.applications-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
}

.app-card {
    background: var(--background-alt);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-med), box-shadow var(--transition-med), background-color var(--transition-med);
}

.app-card h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.app-card h3 i {
    margin-right: 0.4rem;
    color: var(--primary);
}

.app-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Hover effect */
.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.12);
}

/* Generic content sections */
.content-section {
    margin-bottom: 3rem;
    background: var(--background-alt);
    border-radius: var(--radius);
    padding: 1.75rem 1.5rem;
    box-shadow: var(--shadow-soft);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.section-header h2 {
    margin: 0;
    font-size: 1.4rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.section-icon {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

/* Services grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.services-grid article h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.services-grid article p {
    margin: 0;
    color: var(--text-muted);
}

/* Blog */
.blog-post + .blog-post {
    margin-top: 1.5rem;
}

.blog-post h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

/* Contact */
.contact-section {
    background: var(--background-alt);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
    gap: 2rem;
    align-items: flex-start;
}

.contact-info h3 {
    margin-top: 0;
}

.contact-info p {
    margin: 0 0 0.75rem;
}

/* Contact form */
.contact-form {
    background: var(--background);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-soft);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.35rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font: inherit;
    color: var(--text);
    background: var(--background);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(70, 169, 255, 0.25);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius-pill);
    border: none;
    background: var(--primary);
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
    box-shadow: var(--shadow-soft);
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: var(--background);
}

/* Responsive design */
@media (max-width: 992px) {
    .apps-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .services-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .top-bar {
        flex-wrap: wrap;
        align-items: center;
    }

    .main-nav {
        position: fixed;
        top: 64px;
        right: 0;
        left: 0;
        background: var(--background);
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform var(--transition-med);
        box-shadow: var(--shadow-soft);
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.75rem 1rem 1rem;
        gap: 0.5rem;
    }

    .has-dropdown:hover .dropdown {
        /* disable hover dropdown on mobile */
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        position: static;
        box-shadow: none;
        background: transparent;
        padding: 0;
    }

    .dropdown {
        position: static;
        box-shadow: none;
        background: transparent;
        padding-left: 0.75rem;
        margin-top: 0.25rem;
    }

    .dropdown a {
        padding: 0.25rem 0;
    }

    .hamburger {
        display: flex;
    }

    /* Hamburger animation */
    .nav-toggle:checked + .hamburger span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    .nav-toggle:checked + .hamburger span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle:checked + .hamburger span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    /* Show mobile menu when checked */
    .nav-toggle:checked ~ .main-nav {
        transform: translateY(0);
    }

    .slider-wrapper {
        animation-duration: 24s;
    }

    .slide {
        min-height: 220px;
    }

    .apps-grid {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .brand-text h1 {
        font-size: 1.2rem;
    }
    .applications-section h2,
    .section-header h2 {
        font-size: 1.2rem;
    }
    .slide-content h2 {
        font-size: 1.4rem;
    }
}
.brand-logo {
    width: 180px;
    height: 100px;
    object-fit: contain;
    margin-right: 12px;
}