/* Base Styles */
:root {
    --primary-color: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #64b5f6;
    --secondary-color: #e53935;
    --secondary-dark: #b71c1c;
    --secondary-light: #ef5350;
    --accent-color: #ffc107;
    --neutral-100: #f8f9fa;
    --neutral-200: #e9ecef;
    --neutral-300: #dee2e6;
    --neutral-400: #ced4da;
    --neutral-500: #adb5bd;
    --neutral-600: #6c757d;
    --neutral-700: #495057;
    --neutral-800: #343a40;
    --neutral-900: #212529;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: var(--font-sans);
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    --spacing-32: 8rem;
    --max-width: 1200px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--neutral-800);
    background-color: var(--neutral-100);
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--primary-dark);
}

ul, ol {
    list-style-position: inside;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
    color: var(--neutral-900);
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-6);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-5);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-4);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-3);
}

p {
    margin-bottom: var(--spacing-4);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Header */
#main-header {
    background-color: var(--neutral-100);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

#main-header.scrolled {
    background-color: var(--neutral-900);
    box-shadow: var(--shadow-md);
}

#main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-4);
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.logo:hover {
    color: var(--primary-dark);
}

/* Navigation */
#main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-list li {
    margin-left: var(--spacing-6);
}

.nav-list a {
    color: var(--neutral-700);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-2) 0;
}

.nav-list a:hover {
    color: var(--primary-color);
}

.nav-list a.active {
    color: var(--primary-color);
}

.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--neutral-800);
    margin: 5px 0;
    transition: all var(--transition-normal);
}

/* Footer */
#main-footer {
    background-color: var(--neutral-800);
    color: var(--neutral-200);
    padding: var(--spacing-16) 0 var(--spacing-4);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-10);
}

.footer-about,
.footer-links,
.footer-legal,
.footer-contact {
    display: flex;
    flex-direction: column;
}

.footer-about p {
    opacity: 0.8;
}

.footer-links ul,
.footer-legal ul {
    list-style: none;
}

.footer-links li,
.footer-legal li {
    margin-bottom: var(--spacing-2);
}

.footer-links a,
.footer-legal a,
.footer-contact a {
    color: var(--neutral-300);
    transition: color var(--transition-normal);
}

.footer-links a:hover,
.footer-legal a:hover,
.footer-contact a:hover {
    color: var(--primary-light);
}

.social-icons {
    display: flex;
    margin-top: var(--spacing-4);
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--neutral-700);
    border-radius: 50%;
    margin-right: var(--spacing-3);
    transition: background-color var(--transition-normal);
}

.social-icon:hover {
    background-color: var(--primary-color);
}

.social-icon img {
    width: 16px;
    height: 16px;
}

.footer-bottom {
    border-top: 1px solid var(--neutral-700);
    padding-top: var(--spacing-4);
    text-align: center;
    opacity: 0.6;
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Page Banner */
.page-banner {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-16) 0;
    text-align: center;
}

.page-banner h1 {
    color: white;
    margin-bottom: var(--spacing-2);
}

.page-banner p {
    font-size: 1.25rem;
    opacity: 0.8;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-5);
}

label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 500;
}

input, textarea, select {
    width: 100%;
    padding: var(--spacing-3);
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color var(--transition-normal);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background-color: white;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-16) var(--spacing-4);
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-lg);
        z-index: 1000;
    }
    
    .nav-list.active {
        right: 0;
    }
    
    .nav-list li {
        margin: 0 0 var(--spacing-4) 0;
    }
    
    body.menu-open {
        overflow: hidden;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}