/* ===========================
   CSS VARIABLES
   =========================== */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --warning-bg: #fef3c7;
    --warning-border: #f59e0b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-heading: 'Poppins', var(--font-primary);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --container-width: 1200px;
    --header-height: 70px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
}

/* ===========================
   RESET & BASE STYLES
   =========================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

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

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

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

ul {
    list-style: none;
}

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

strong {
    font-weight: 600;
}

/* ===========================
   LAYOUT COMPONENTS
   =========================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    height: var(--header-height);
}

#header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    height: 2px;
    background-color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: var(--spacing-xs);
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.hamburger-icon {
    font-size: 1.75rem;
}

/* ===========================
   BUTTONS & CTAs
   =========================== */
.cta-button,
.cta-button-large {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--bg-white);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    border: none;
    cursor: pointer;
    text-align: center;
}

.cta-button:hover,
.cta-button-large:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: var(--bg-white);
}

.cta-button:active,
.cta-button-large:active {
    transform: translateY(0);
}

.cta-button-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    border-radius: var(--border-radius-lg);
}

/* ===========================
   SECTIONS GENERAL
   =========================== */
section {
    padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
    background-color: var(--bg-white);
}

section:nth-child(odd) {
    background-color: var(--bg-light);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    margin-top: var(--header-height);
    padding: var(--spacing-xl) 0;
    text-align: center;
    background-color: var(--bg-white);
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.subheadline {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.disclaimer-box {
    background-color: var(--warning-bg);
    border-left: 4px solid var(--warning-border);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-md) auto;
    max-width: 800px;
    text-align: left;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.disclaimer-box strong {
    color: #92400e;
}

.benefits-checklist {
    text-align: left;
    max-width: 700px;
    margin: var(--spacing-md) auto;
    list-style: none;
}

.benefits-checklist li {
    padding: var(--spacing-xs) 0;
    font-size: 1.125rem;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.checkmark {
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.hero .cta-button-large {
    margin-top: var(--spacing-md);
}

/* ===========================
   WHY CHOOSE SECTION
   =========================== */
.why-choose {
    background-color: var(--bg-light);
}

.why-choose h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.content-block {
    max-width: 900px;
    margin: 0 auto;
}

.content-block p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.disclaimer-small {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: var(--spacing-md);
}

/* ===========================
   LEARNING JOURNEY SECTION
   =========================== */
.learning-journey {
    background-color: var(--bg-white);
}

.learning-journey h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.card {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.learning-journey .card {
    background-color: var(--bg-light);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ===========================
   UNIQUE FEATURES SECTION
   =========================== */
.unique-features {
    background-color: var(--bg-light);
}

.unique-features h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.intro-text {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg) auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature-card {
    background-color: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ===========================
   CTA SECTION
   =========================== */
.cta-section {
    background-color: var(--bg-white);
    text-align: center;
}

.cta-section h2 {
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-md) auto;
    line-height: 1.8;
}

.cta-section .cta-button-large {
    margin: var(--spacing-md) 0;
}

.cta-section .disclaimer-small {
    max-width: 700px;
    margin: var(--spacing-md) auto 0 auto;
    text-align: center;
}

/* ===========================
   CONTACT SECTION
   =========================== */
.contact {
    background-color: var(--bg-light);
    text-align: center;
}

.contact h2 {
    margin-bottom: var(--spacing-md);
}

.contact p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-md) auto;
}

.contact-email {
    font-size: 1.25rem;
}

.contact-email a {
    font-weight: 600;
    color: var(--primary-color);
}

/* ===========================
   FOOTER
   =========================== */
footer {
    background-color: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

footer h3,
footer h4 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

footer p {
    color: #d1d5db;
    line-height: 1.7;
}

.footer-disclaimer {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: #9ca3af;
}

footer a {
    color: #d1d5db;
    transition: color var(--transition-fast);
}

footer a:hover {
    color: var(--bg-white);
}

footer ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid #4b5563;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: center;
    color: #9ca3af;
    font-size: 0.9rem;
}

.company-details {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
}

/* ===========================
   LEGAL PAGES
   =========================== */
.simple-header {
    height: var(--header-height);
}

.simple-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    color: var(--primary-color);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
}

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

.legal-page {
    margin-top: var(--header-height);
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-white);
    min-height: calc(100vh - var(--header-height));
}

.legal-page .container {
    max-width: 900px;
}

.legal-page h1 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.last-updated {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.legal-page section {
    margin-bottom: var(--spacing-lg);
    padding: 0;
    background-color: transparent;
}

.legal-page h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    font-size: 1.75rem;
}

.legal-page h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 1.25rem;
}

.legal-page ul {
    list-style: disc;
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.legal-page ul li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    line-height: 1.7;
}

.legal-page ol {
    list-style: decimal;
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.legal-page ol li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    line-height: 1.7;
}

.legal-page p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.simple-footer {
    background-color: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.9rem;
}

.simple-footer a {
    color: var(--bg-white);
    text-decoration: underline;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
        align-items: flex-start;
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
        font-size: 1.125rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    #header nav .cta-button {
        display: none;
    }

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

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

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

    section {
        padding: var(--spacing-lg) 0;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding: var(--spacing-md) 0;
    }

    .benefits-checklist li {
        font-size: 1rem;
    }

    .cta-button-large {
        padding: 0.875rem 1.75rem;
        font-size: 1rem;
        width: 100%;
    }

    .disclaimer-box {
        padding: var(--spacing-sm);
    }

    .card,
    .feature-card {
        padding: var(--spacing-sm);
    }

    .legal-page {
        padding: var(--spacing-md) 0;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print styles */
@media print {
    .header,
    .mobile-menu-toggle,
    .cta-button,
    .cta-button-large,
    footer {
        display: none;
    }

    body {
        background-color: white;
        color: black;
    }

    .legal-page {
        margin-top: 0;
    }
}