/**
 * Professional Frontend Design System
 * Modern SaaS-grade design for CMS
 */

/* ============================================
   1. CSS VARIABLES & DESIGN TOKENS
   ============================================ */

:root {
    /* Color Palette - Optimized for Modern SaaS */
    --color-primary: #6366F1;
    --color-primary-dark: #4338CA;
    --color-primary-light: #818CF8;
    --color-secondary: #06B6D4;
    --color-secondary-dark: #0891B2;
    --color-accent: #F59E0B;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #DC2626;
    
    /* Neutrals */
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 2rem;        /* 32px */
    --font-size-4xl: 2.5rem;      /* 40px */
    --font-size-5xl: 3.5rem;      /* 56px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    --line-height-loose: 1.8;
    
    /* 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 */
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* ============================================
   2. GLOBAL STYLES
   ============================================ */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-900);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--space-md);
    color: var(--color-gray-600);
}

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

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

/* ============================================
   3. BUTTON STYLES
   ============================================ */

.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-secondary-modern {
    background-color: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-ghost {
    background-color: transparent;
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}

.btn-ghost:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-400);
    color: var(--color-gray-900);
}

.btn-lg-modern {
    padding: 1.125rem 2.5rem;
    font-size: var(--font-size-lg);
}

.btn-sm-modern {
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
}

/* ============================================
   4. CARD STYLES
   ============================================ */

.card-modern {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}

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

.card-modern-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: white;
}

/* ============================================
   5. HEADER STYLES
   ============================================ */

.header-modern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    background-color: transparent;
}

.header-modern.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.navbar-modern {
    padding: var(--space-lg) 0;
}

.nav-link-modern {
    color: white;
    font-weight: var(--font-weight-medium);
    padding: var(--space-sm) var(--space-lg);
    transition: color var(--transition-fast);
}

.header-modern.scrolled .nav-link-modern {
    color: var(--color-gray-700);
}

.nav-link-modern:hover {
    color: var(--color-primary);
}

/* ============================================
   6. SECTION SPACING
   ============================================ */

.section-modern {
    padding: var(--space-4xl) 0;
}

.section-modern-hero {
    padding: 8rem 0 var(--space-4xl) 0;
    margin-top: 80px;
}

/* ============================================
   7. ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.6s ease-out;
}

/* Scroll animations - will be triggered by JS */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animation Delay Utilities */
.scroll-animate-delay-1 { transition-delay: 0.1s; }
.scroll-animate-delay-2 { transition-delay: 0.2s; }
.scroll-animate-delay-3 { transition-delay: 0.3s; }
.scroll-animate-delay-4 { transition-delay: 0.4s; }
.scroll-animate-delay-5 { transition-delay: 0.5s; }

/* Hover Effects */
.card-modern:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.integration-logo:hover {
    transform: translateY(-8px) scale(1.05);
}

.pricing-card:hover {
    transform: scale(1.02);
    border-color: var(--color-primary);
}

.btn-hover-lift {
    transition: all var(--transition-base);
}

.btn-hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   8. GRADIENT BACKGROUNDS
   ============================================ */

.gradient-primary {
    background: linear-gradient(135deg, #6366F1 0%, #818CF8 50%, #06B6D4 100%);
}

.gradient-secondary {
    background: linear-gradient(135deg, #06B6D4 0%, #0891B2 100%);
}

.gradient-mesh {
    background: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.15) 0, transparent 50%),
        radial-gradient(at 0% 100%, rgba(6, 182, 212, 0.15) 0, transparent 50%);
}

.gradient-mesh-animated {
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* ============================================
   9. UTILITY CLASSES
   ============================================ */

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.badge-modern {
    display: inline-block;
    padding: 0.375rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    background-color: var(--color-primary-light);
    color: white;
}

.divider-modern {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gray-300), transparent);
    margin: var(--space-3xl) 0;
}

/* ============================================
   10. RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 767px) {
    :root {
        --font-size-5xl: 2.5rem;   /* 40px on mobile */
        --font-size-4xl: 2rem;     /* 32px on mobile */
        --font-size-3xl: 1.75rem;  /* 28px on mobile */
        --space-4xl: 3rem;         /* Reduce spacing on mobile */
    }
    
    .section-modern {
        padding: var(--space-3xl) 0;
    }
    
    .section-modern-hero {
        padding: 6rem 0 var(--space-3xl) 0;
        margin-top: 60px;
    }
    
    .btn-modern {
        width: 100%;
        justify-content: center;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --font-size-5xl: 3rem;     /* 48px on tablet */
    }
}

/* ============================================
   11. ACCESSIBILITY
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

/* ============================================
   12. SPECIFIC SECTION STYLES
   ============================================ */

/* Stats Section */
.stat-card {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-top: var(--space-sm);
}

/* Integration Logos */
.integration-logo {
    padding: var(--space-xl);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    transition: all var(--transition-base);
    background: white;
}

.integration-logo:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.integration-logo img {
    max-width: 120px;
    max-height: 60px;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all var(--transition-base);
}

.integration-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

/* Steps Section */
.step-item {
    position: relative;
    display: flex;
    gap: var(--space-xl);
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    box-shadow: var(--shadow-md);
}

.step-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

.step-content p {
    color: var(--color-gray-600);
}

/* Pricing Cards */
.pricing-card {
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card.featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    transform: scale(1.05);
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.pricing-price {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
}

.pricing-period {
    color: var(--color-gray-500);
    font-size: var(--font-size-base);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: var(--space-xl) 0;
}

.pricing-features li {
    padding: var(--space-sm) 0;
    color: var(--color-gray-600);
    display: flex;
    align-items: center;
}

.pricing-features li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
    margin-right: var(--space-sm);
}

/* FAQ Accordion */
.faq-accordion .accordion-item {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    overflow: hidden;
}

.faq-accordion .accordion-button {
    font-weight: var(--font-weight-semibold);
    padding: var(--space-lg);
    background-color: white;
    color: var(--color-gray-900);
}

.faq-accordion .accordion-button:not(.collapsed) {
    background-color: var(--color-gray-50);
    color: var(--color-primary);
}

.faq-accordion .accordion-body {
    padding: var(--space-lg);
    color: var(--color-gray-600);
}

/* Trust Badges */
.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--font-size-sm);
}

/* Footer */
.footer-modern {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding-top: var(--space-4xl);
}

.footer-modern h5 {
    color: white;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-lg);
}

.footer-modern a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-modern a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding: var(--space-xl) 0;
    margin-top: var(--space-3xl);
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-md);
    border: 1px solid var(--color-gray-700);
    border-radius: var(--radius-md);
    background-color: var(--color-gray-800);
    color: white;
}

.newsletter-form input::placeholder {
    color: var(--color-gray-500);
}

.newsletter-form button {
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Contact Page Styles */
.contact-info-card {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, white 100%);
}

.contact-info-card .bi {
    color: var(--color-primary);
}

.contact-info-card a:hover {
    color: var(--color-primary) !important;
}

.contact-form .form-control {
    padding: var(--space-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-form .form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.1);
}

.contact-form .form-control.is-invalid {
    border-color: var(--color-danger);
}

.contact-form .invalid-feedback {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

/* ============================================
   HEADER & NAVIGATION - Enhanced Visibility
   ============================================ */

.header-modern {
    transition: all 0.3s ease;
    z-index: 1030;
}

.header-modern.sticky-top {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar-brand {
    font-weight: 700;
    color: var(--color-primary, #6366F1) !important;
    transition: opacity 0.3s ease;
}

.navbar-brand:hover {
    opacity: 0.8;
}

.navbar-nav {
    gap: 0.25rem;
}

.navbar-nav .nav-link {
    color: var(--color-gray-700, #374151);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
    border-radius: 0.375rem;
}

.navbar-nav .nav-link:hover {
    color: var(--color-primary, #6366F1);
    background-color: var(--color-gray-50, #F9FAFB);
}

.navbar-nav .nav-link.active {
    color: var(--color-primary, #6366F1);
    font-weight: 600;
}

/* Dropdown Menus */
.dropdown-menu {
    border: 1px solid var(--color-gray-200, #E5E7EB);
    border-radius: 0.5rem;
    padding: 0.5rem;
    margin-top: 0.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.dropdown-item {
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background-color: var(--color-gray-50, #F9FAFB);
    color: var(--color-primary, #6366F1);
}

/* Mobile Offcanvas Menu Styling */
.offcanvas {
    max-width: 320px;
}

.offcanvas-header {
    padding: 1.5rem;
}

.offcanvas-title {
    color: var(--color-primary, #6366F1);
}

.offcanvas-body {
    padding: 1rem 0;
}

.offcanvas .nav-link {
    color: var(--color-gray-700, #374151);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.offcanvas .nav-link:hover {
    color: var(--color-primary, #6366F1);
    background-color: var(--color-gray-50, #F9FAFB);
    padding-left: 1.25rem;
}

.offcanvas .nav-link.border-bottom {
    border-color: var(--color-gray-100, #F3F4F6) !important;
}

/* CTA Buttons */
.btn-outline-primary {
    border-color: var(--color-primary, #6366F1);
    color: var(--color-primary, #6366F1);
}

.btn-outline-primary:hover {
    background-color: var(--color-primary, #6366F1);
    border-color: var(--color-primary, #6366F1);
    color: white;
}

.btn-primary {
    background-color: var(--color-primary, #6366F1);
    border-color: var(--color-primary, #6366F1);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark, #4338CA);
    border-color: var(--color-primary-dark, #4338CA);
}

/* Mobile menu toggle button */
.btn-link {
    color: var(--color-gray-700, #374151);
    text-decoration: none;
}

.btn-link:hover {
    color: var(--color-primary, #6366F1);
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    .navbar-brand img {
        height: 32px !important;
        max-height: 32px !important;
    }
    
    .navbar-brand span {
        font-size: 1.25rem !important;
    }
}