/* ===================================
   ProcureMind.tech - Liquid Glass Design
   =================================== */

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

:root {
    /* Color Palette - Professional Blue/Teal */
    --primary-blue: #2563EB;
    --primary-blue-light: #3B82F6;
    --secondary-teal: #10B981;
    --secondary-teal-light: #14B8A6;
    --accent-purple: #8B5CF6;
    
    /* Backgrounds */
    --bg-dark-1: #0F172A;
    --bg-dark-2: #1E293B;
    --bg-dark-3: #334155;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    
    /* Text Colors */
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1200px;
    
    /* Border Radius - Only 2 values allowed */
    --radius-2xl: 24px;
    --radius-full: 9999px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark-1) 0%, var(--bg-dark-2) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===================================
   Animated Background
   =================================== */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.gradient-shape {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--secondary-teal-light), var(--accent-purple));
    bottom: -150px;
    right: -150px;
    animation-delay: 5s;
}

.shape-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-purple), var(--primary-blue-light));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-30px, 30px) scale(0.9);
    }
}

/* ===================================
   Glass Effect
   =================================== */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: 0 8px 32px var(--glass-shadow);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 8px rgba(37, 99, 235, 0.5));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:not(.cta-button):hover {
    color: var(--text-primary);
}

.nav-links a:not(.cta-button)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-teal));
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-full);
}

.nav-links a:not(.cta-button):hover::after {
    width: 100%;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    right: 24px;
    flex-direction: column;
    gap: 12px;
    padding: 24px;
    z-index: 999;
    min-width: 200px;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 12px;
    border-radius: var(--radius-2xl);
    transition: all 0.3s ease;
}

.mobile-menu a:hover {
    background: var(--glass-bg);
}

/* ===================================
   Buttons
   =================================== */
.cta-button {
    padding: 12px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.6);
}

.cta-button.secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: 180px 0 120px;
    text-align: center;
    position: relative;
}

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

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue-light), var(--secondary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    margin-top: 80px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue-light), var(--secondary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
}

/* ===================================
   Features Section
   =================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 40px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-teal));
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-full);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.3);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 24px;
    display: inline-block;
    filter: drop-shadow(0 0 12px rgba(37, 99, 235, 0.5));
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-teal);
    font-weight: 700;
}

/* ===================================
   How It Works Section
   =================================== */
.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.step-card {
    flex: 1;
    min-width: 280px;
    max-width: 320px;
    padding: 40px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-card:hover {
    transform: scale(1.05);
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto 24px;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.step-arrow {
    font-size: 32px;
    color: var(--primary-blue);
    font-weight: 700;
}

/* ===================================
   Use Cases Section
   =================================== */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.use-case-card {
    padding: 40px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.use-case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(16, 185, 129, 0.3);
}

.use-case-icon {
    font-size: 56px;
    margin-bottom: 24px;
    display: inline-block;
}

.use-case-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.use-case-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   Pricing Section
   =================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    padding: 48px 40px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary-blue);
}

.pricing-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 24px 80px rgba(37, 99, 235, 0.4);
}

.pricing-card.featured:hover {
    transform: translateY(-12px) scale(1.07);
}

.pricing-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.pricing-badge.popular {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    border: none;
    color: white;
}

.pricing-price {
    margin-bottom: 32px;
}

.price-currency {
    font-size: 32px;
    font-weight: 700;
    vertical-align: top;
}

.price-amount {
    font-size: 64px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue-light), var(--secondary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    font-size: 18px;
    color: var(--text-muted);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-button {
    width: 100%;
    padding: 16px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: white;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
}

.pricing-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.5);
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    padding: 100px 0;
}

.cta-content {
    padding: 80px 60px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 24px;
}

.cta-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-form {
    display: flex;
    gap: 16px;
    max-width: 600px;
    margin: 0 auto 16px;
}

.email-input {
    flex: 1;
    padding: 16px 24px;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.email-input::placeholder {
    color: var(--text-muted);
}

.email-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.cta-note {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    padding: 80px 0 32px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 350px;
}

.footer-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 14px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: rgba(37, 99, 235, 0.2);
    border-color: var(--primary-blue);
    color: var(--primary-blue-light);
    transform: translateY(-2px);
}

/* ===================================
   Animations
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .cta-button {
        width: 100%;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .cta-content {
        padding: 40px 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}