/* -----------------------------------------
   DESIGN SYSTEM & BASE STYLES
   ----------------------------------------- */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* CSS Variables (Root) */
:root {
    --font-primary: 'Inter', sans-serif;

    /* Colors */
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F9FAFB;
    --color-bg-tertiary: #F3F4F6;
    --color-border: #E5E7EB;
    --color-text-primary: #111827;
    --color-text-secondary: #374151;
    --color-text-tertiary: #6B7280;
    --color-primary: #4338CA; /* A strong, modern indigo */
    --color-primary-hover: #3730A3;
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-success: #10B981;
    --color-error: #EF4444;

    /* Spacing */
    --space-xs: 0.5rem;  /* 8px */
    --space-sm: 0.75rem; /* 12px */
    --space-md: 1rem;    /* 16px */
    --space-lg: 1.5rem;  /* 24px */
    --space-xl: 2rem;    /* 32px */
    --space-2xl: 3rem;   /* 48px */
    --space-3xl: 4rem;   /* 64px */
    --space-4xl: 6rem;   /* 96px */

    /* Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 4rem;

    /* Border Radius */
    --rounded-sm: 0.25rem;
    --rounded-md: 0.5rem;
    --rounded-lg: 0.75rem;
    --rounded-xl: 1rem;
    --rounded-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* Base & Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-5xl); font-weight: 800; }
h2 { font-size: var(--text-4xl); font-weight: 700; }
h3 { font-size: var(--text-3xl); font-weight: 600; }
h4 { font-size: var(--text-2xl); font-weight: 600; }
h5 { font-size: var(--text-xl); font-weight: 600; }

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

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

/* -----------------------------------------
   LAYOUT & GRID
   ----------------------------------------- */

.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.section {
    padding-top: var(--space-4xl);
    padding-bottom: var(--space-4xl);
}

.section-sm {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }


/* -----------------------------------------
   COMPONENTS
   ----------------------------------------- */

/* Buttons */
.btn {
    display: inline-block;
    font-size: var(--text-base);
    font-weight: 600;
    padding: 0.875rem 1.75rem;
    border-radius: var(--rounded-md);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-text-tertiary);
    color: var(--color-text-primary);
    text-decoration: none;
}

.btn-lg {
    font-size: var(--text-lg);
    padding: 1rem 2rem;
}

/* Cards */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--rounded-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Header & Navigation */
.main-header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    width: 100%;
}

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

.logo {
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--color-text-primary);
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--space-lg);
}

.main-nav a {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: var(--space-xs) 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Footer */
.main-footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0;
    color: var(--color-text-tertiary);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-2xl);
}

.footer-column h5 {
    color: var(--color-text-primary);
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-column a {
    color: var(--color-text-tertiary);
    text-decoration: none;
}

.footer-column a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

.footer-bottom {
    margin-top: var(--space-3xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
}

/* -----------------------------------------
   UTILITY CLASSES
   ----------------------------------------- */

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }
.mt-6 { margin-top: var(--space-2xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }
.mb-6 { margin-bottom: var(--space-2xl); }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }


/* -----------------------------------------
   PAGE-SPECIFIC STYLES
   ----------------------------------------- */

/* Hero Section */
.hero-section {
    padding: var(--space-4xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content .subheadline {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: var(--space-lg) auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.hero-image-container {
    margin-top: var(--space-3xl);
    padding: 0 var(--space-lg);
}

.hero-image {
    border-radius: var(--rounded-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    width: 100%;
}

/* Logos Section */
.logos-section {
    padding: var(--space-2xl) 0;
}
.logos-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
    filter: grayscale(100%);
    opacity: 0.6;
}

/* How It Works Section */
.step-icon {
    width: 64px;
    height: 64px;
    background-color: var(--color-bg-secondary);
    border-radius: var(--rounded-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-border);
}

.step-icon i {
    color: var(--color-primary);
    font-size: 2rem;
}

/* Pricing Page */
.pricing-toggle-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
}
.pricing-toggle {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}
.pricing-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}
.pricing-toggle .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-primary);
    transition: .4s;
    border-radius: 34px;
}
.pricing-toggle .slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
.pricing-toggle input:checked + .slider {
    background-color: var(--color-primary);
}
.pricing-toggle input:checked + .slider:before {
    transform: translateX(26px);
}
.badge-success {
    background-color: var(--color-success);
    color: var(--color-white);
    padding: 0.25rem 0.5rem;
    border-radius: var(--rounded-full);
    font-size: var(--text-xs);
    font-weight: 600;
}
.feature-list {
    list-style: none;
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}
.feature-comparison-table {
    overflow-x: auto;
}
.feature-comparison-table table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-xl);
}
.feature-comparison-table th,
.feature-comparison-table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}
.feature-comparison-table th {
    background-color: var(--color-bg-secondary);
    font-weight: 600;
}
.feature-comparison-table td {
    text-align: center;
}
.feature-comparison-table td:first-child {
    text-align: left;
    font-weight: 500;
}
.feature-comparison-table .category-row td {
    background-color: var(--color-bg-tertiary);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: left;
}

/* Contact Form */
.contact-form .form-group {
    margin-bottom: var(--space-lg);
}
.contact-form label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--rounded-md);
    font-size: var(--text-base);
    font-family: var(--font-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
}
.contact-form textarea {
    resize: vertical;
}

/* FAQ Accordion */
.faq-accordion .faq-item {
    border-bottom: 1px solid var(--color-border);
}
.faq-question {
    width: 100%;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
    text-align: left;
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    cursor: pointer;
}
.faq-icon {
    transition: transform 0.3s ease;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-answer p {
    padding-bottom: var(--space-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}
.faq-item.active .faq-icon {
    transform: rotate(180deg);
}


/* -----------------------------------------
   RESPONSIVE DESIGN
   ----------------------------------------- */

@media (max-width: 992px) {
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }

    .grid-cols-3, .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-lg);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .nav-actions .btn-secondary {
        display: none;
    }

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

    .grid-cols-2, .grid-cols-3, .grid-cols-4, .grid-cols-5 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}