/* 1. Theming and Variables based on Mantine Theme */
:root {
    --font-family: 'Inter', sans-serif;

    /* Colors */
    --brand-blue-0: #eef6ff;
    --brand-blue-2: #b4d3f3;
    --brand-blue-6: #4196e3;
    --brand-blue-7: #3282ca;
    --brand-blue-9: #0b65a0;

    --brand-gray-0: #f5f5f5;
    --brand-gray-3: #b9b9b9;
    --brand-gray-7: #797979;
    --brand-gray-9: #5a5a5a;

    /* Light Theme */
    --bg-color: #ffffff;
    --bg-color-alt: #f8f9fa;
    --paper-bg: #ffffff;
    --text-color: #343a40;
    --text-color-secondary: var(--brand-gray-7);
    --border-color: #e9ecef;
    --primary-color: var(--brand-blue-7);

    /* Sizing */
    --radius-md: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg-color: #141517;
    --bg-color-alt: #1A1B1E;
    --paper-bg: #1A1B1E;
    --text-color: #c1c2c5;
    --text-color-secondary: #909296;
    --border-color: #373A40;
    --primary-color: var(--brand-blue-6);
}

/* 2. Global Styles & Resets */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 200ms ease-in-out, color 200ms ease-in-out;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

h1, h2, h3, h4 {
    font-family: var(--font-family);
    font-weight: 700;
}
h1 { font-size: 2.5rem; line-height: 1.2; }
h2 { font-size: 2rem; line-height: 1.3; margin-bottom: var(--spacing-md); }
h3 { font-size: 1.75rem; line-height: 1.4; margin-bottom: 0.5rem; }

section {
    padding: calc(var(--spacing-xl) * 2) 0;
}

.section-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-xl) * 1.5);
}
.section-header p {
    color: var(--text-color-secondary);
    max-width: 600px;
    margin: 0.5rem auto 0;
}

.hidden {
    display: none !important;
}

/* 3. Component Styles (Button, Paper, Input) */
.btn {
    display: inline-block;
    padding: 0.75rem var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: transform 150ms ease, background-color 150ms ease;
}
.btn:hover {
    transform: scale(1.02);
}
.btn-primary {
    background-color: var(--primary-color);
    color: white;
}
.btn-primary:hover {
    background-color: var(--brand-blue-9);
}
[data-theme="dark"] .btn-primary:hover {
    background-color: var(--brand-blue-7);
}

.paper {
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    background-color: var(--paper-bg);
    border: 1px solid var(--border-color);
    transition: background-color 200ms ease-in-out, border-color 200ms ease-in-out;
}

.text-input {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-color-alt);
    color: var(--text-color);
}
.text-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-color) 20%, transparent);
}
[data-theme="dark"] .text-input {
    background-color: #25262B;
}

/* 4. Layout & Section Styles */

/* Header */
.header {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}
.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header__logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--primary-color);
}
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}
.header__portal-link {
    font-weight: 600;
    text-decoration: none;
    color: var(--text-color-secondary);
    transition: color 150ms ease;
}
.header__portal-link:hover {
    color: var(--primary-color);
}

/* Dark Mode Toggle */
.dark-mode-toggle { background: none; border: none; cursor: pointer; color: var(--text-color-secondary); padding: 0.25rem; }
[data-theme="dark"] .dark-mode-toggle .sun-icon { display: none; }
[data-theme="light"] .dark-mode-toggle .moon-icon { display: none; }

/* Hero */
.hero { background-color: var(--bg-color-alt); }
.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: calc(var(--spacing-xl) * 2);
}
.hero__subtitle { font-size: 1.25rem; color: var(--text-color-secondary); margin: var(--spacing-lg) 0; }
.hero__image img { max-width: 100%; border-radius: var(--radius-md); box-shadow: var(--shadow-md); }

/* Features */
.features__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-xl); }
.feature__icon { border-radius: 50%; margin-bottom: var(--spacing-md); }

/* Testimonial */
.testimonial { background-color: var(--bg-color-alt); }
.testimonial__container { max-width: 800px; text-align: center; }
blockquote { font-size: 1.5rem; font-style: italic; margin-bottom: var(--spacing-md); }
cite { font-weight: 600; color: var(--text-color-secondary); }

/* Contact Form */
.contact__form { max-width: 700px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--spacing-md); }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.5rem; }

/* Privacy Policy */
.policy-container { max-width: 900px; margin: var(--spacing-xl) auto; }
.policy-container h1 { margin-bottom: var(--spacing-lg); }
.policy-container h3 { margin-top: var(--spacing-xl); }
.policy-container p { margin-bottom: var(--spacing-md); }
.back-link { display: inline-block; margin-bottom: var(--spacing-lg); text-decoration: none; font-weight: 600; color: var(--primary-color); }

/* Footer */
.footer { padding: var(--spacing-xl) 0; border-top: 1px solid var(--border-color); margin-top: calc(var(--spacing-xl) * 2); }
.footer__container { display: flex; justify-content: space-between; align-items: center; }
.footer__nav { display: flex; gap: var(--spacing-lg); }
.footer__nav a { text-decoration: none; color: var(--text-color-secondary); transition: color 150ms ease; }
.footer__nav a:hover { color: var(--primary-color); }


/* 5. Responsive Styles */
@media (max-width: 992px) {
    .hero__container { grid-template-columns: 1fr; text-align: center; }
    .hero__text { order: 2; }
    .hero__image { order: 1; margin-bottom: var(--spacing-xl); }
    .features__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    .features__grid { grid-template-columns: 1fr; }
    .footer__container { flex-direction: column; gap: var(--spacing-md); }
}