/* Custom CSS Variables and Base Styles */
:root {
    --navy: #0f172a;
    --white: #ffffff;
    --slate-gray: #94a3b8;
    --light-bg: #f8fafc;
    --dark-bg: var(--navy);
    --light-text: var(--navy);
    --dark-text: #e2e8f0;
    --accent-color: #3b82f6;
    --card-bg-light: var(--white);
    --card-bg-dark: #1e293b;
    --border-color-light: #e2e8f0;
    --border-color-dark: #334155;
    --header-font: 'Poppins', sans-serif;
    --body-font: 'Open Sans', sans-serif;
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: background-color 0.3s ease, color 0.3s ease;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--header-font);
    font-weight: 700;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding-top: 0.25rem;
    padding-bottom: 0.25rem;
}
body.dark-mode .site-header {
    background-color: rgba(15, 23, 42, 0.8);
}
.site-header.scrolled {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
body.dark-mode .site-header.scrolled {
    background-color: var(--navy);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.header-logo {
    height: 50px;
    width: auto;
}

.hero-section {
    padding-top: 100px;
    padding-bottom: 60px;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    font-family: var(--header-font);
}
.btn-primary {
    background-color: var(--accent-color);
    color: var(--white);
}
.btn-primary:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
}
body.dark-mode .btn-primary:hover {
    background-color: #60a5fa;
}
.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}
.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--white);
    transform: translateY(-2px);
}
body.dark-mode .btn-secondary {
    color: #60a5fa;
    border-color: #60a5fa;
}
body.dark-mode .btn-secondary:hover {
    background-color: #60a5fa;
    color: var(--dark-bg);
}

.feature-card {
    background-color: var(--card-bg-light);
    border: 1px solid var(--border-color-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}
body.dark-mode .feature-card {
    background-color: var(--card-bg-dark);
    border-color: var(--border-color-dark);
}
body.dark-mode .feature-card:hover {
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.process-step { border-left: 3px solid var(--accent-color); }
body.dark-mode .process-step { border-left-color: #60a5fa; }
.process-step-number { background-color: var(--accent-color); color: var(--white); }
body.dark-mode .process-step-number { background-color: #60a5fa; color: var(--dark-bg); }

.testimonial-card { background-color: var(--card-bg-light); border: 1px solid var(--border-color-light); }
body.dark-mode .testimonial-card { background-color: var(--card-bg-dark); border-color: var(--border-color-dark); }

.form-input { background-color: var(--white); border: 1px solid var(--border-color-light); color: var(--light-text); }
.form-input:focus { border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }
body.dark-mode .form-input { background-color: var(--card-bg-dark); border-color: var(--border-color-dark); color: var(--dark-text); }
body.dark-mode .form-input:focus { border-color: #60a5fa; box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.3); }

.back-to-top { position: fixed; bottom: 20px; right: 20px; background-color: var(--accent-color); color: var(--white); width: 50px; height: 50px; border-radius: 50%; display: flex; align-items: center; justify-content: center; text-decoration: none; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease; z-index: 999; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background-color: #2563eb; transform: scale(1.1); }
body.dark-mode .back-to-top { background-color: #60a5fa; color: var(--dark-bg); }
body.dark-mode .back-to-top:hover { background-color: #3b82f6; }

.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-on-scroll.is-visible { opacity: 1; transform: translateY(0); }

.mobile-nav-toggle { display: none; }
.site-nav ul { list-style: none; padding: 0; margin: 0; display: flex; }
.site-nav ul li a { padding: 1rem; display: block; text-decoration: none; color: inherit; font-weight: 600; transition: color 0.3s ease; }
.site-nav ul li a:hover { color: var(--accent-color); }
body.dark-mode .site-nav ul li a:hover { color: #60a5fa; }

.theme-switch-wrapper { display: flex; align-items: center; }
.theme-switch { display: inline-block; height: 24px; position: relative; width: 44px; margin-left: 1rem; }
.theme-switch input { display:none; }
.slider { background-color: #ccc; bottom: 0; cursor: pointer; left: 0; position: absolute; right: 0; top: 0; transition: .4s; border-radius: 24px; }
.slider:before { background-color: #fff; bottom: 3px; content: ""; height: 18px; left: 3px; position: absolute; transition: .4s; width: 18px; border-radius: 50%; }
input:checked + .slider { background-color: var(--accent-color); }
input:checked + .slider:before { transform: translateX(20px); }
body.dark-mode .slider { background-color: #4b5563; }
body.dark-mode input:checked + .slider { background-color: #60a5fa; }

.language-toggle-btn {
    background: none;
    border: 1px solid var(--slate-gray);
    color: inherit;
    padding: 0.4rem 0.8rem; 
    border-radius: 0.375rem; 
    cursor: pointer;
    margin-left: 1rem;
    font-size: 0.9rem; 
    font-weight: 600;
    transition: background-color 0.3s, color 0.3s;
}
.language-toggle-btn:hover {
    background-color: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}
body.dark-mode .language-toggle-btn {
    border-color: var(--slate-gray);
}
body.dark-mode .language-toggle-btn:hover {
    background-color: #60a5fa;
    color: var(--dark-bg);
    border-color: #60a5fa;
}

@media (max-width: 768px) {
    .site-header .container { flex-wrap: wrap; }
    .mobile-nav-toggle { display: block; background: none; border: none; color: inherit; font-size: 1.5rem; cursor: pointer; order: 3; }
    .site-nav { width: 100%; max-height: 0; overflow: hidden; transition: max-height 0.5s ease-in-out; order: 4; background-color: var(--card-bg-light); }
    body.dark-mode .site-nav { background-color: var(--card-bg-dark); }
    .site-nav.active { max-height: 500px; border-top: 1px solid var(--border-color-light); }
    body.dark-mode .site-nav.active { border-top: 1px solid var(--border-color-dark); }
    .site-nav ul { flex-direction: column; align-items: center; }
    .site-nav ul li a { padding: 0.8rem 1rem; width: 100%; text-align: center; border-bottom: 1px solid var(--border-color-light); }
    body.dark-mode .site-nav ul li a { border-bottom: 1px solid var(--border-color-dark); }
    .site-nav ul li:last-child a { border-bottom: none; }
    .hero-section { padding-top: 120px; text-align: center; } 
    .hero-section .container > div { flex-direction: column; align-items: center; }
    .header-logo { height: 40px; }
    .process-section .grid, .contact-section .grid { grid-template-columns: 1fr; } 
    .language-toggle-btn { margin-top: 0.5rem; margin-left: 0; width: 100%; text-align: center;} 
    .site-header .flex.items-center > div:not(.theme-switch-wrapper) { 
         width: 100%;
         display: flex;
         justify-content: center; 
    }
}
@media (max-width: 400px) { 
    .site-header .flex.items-center {
        flex-direction: column;
        align-items: flex-end; 
        width: auto; 
    }
    .theme-switch-wrapper { margin-bottom: 0.5rem; }
    .language-toggle-btn { margin-left: 0; width: auto; padding: 0.4rem 0.8rem;}
    .header-logo { height: 35px; }
    .hero-section { padding-top: 90px; }
}

.site-footer { background-color: var(--navy); color: var(--slate-gray); padding: 2rem 0; text-align: center; }
body.dark-mode .site-footer { background-color: #0b1221; }

.calendly-inline-widget { border-radius: 0.5rem; overflow: hidden; }

.font-zen {
  font-family: 'Zen Tokyo Zoo', cursive;
  text-shadow: 1px 2px 0 #0f172a, 2px 4px 6px #3b82f6;
}