/* ========================================
   RDS Flow - Modern Minimalist CSS Framework
   ======================================== */

:root {
    /* Color Palette - Inspired by modern SaaS design */
    --primary: #7E71B1;
    --primary-dark: #6B5E9E;
    --primary-light: #9B8EC8;
    --secondary: #25D366;
    --accent: #6C63FF;
    --dark: #1a1a2e;
    --dark-light: #2d2d44;
    --light: #f8f9fa;
    --white: #ffffff;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --success: #25D366;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;

    /* 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;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

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

body {
    font-family: var(--font-primary);
    color: var(--dark);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    font-size: 1.125rem;
    color: var(--gray);
}

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

/* ========================================
   Layout & Container
   ======================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

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

/* ========================================
   Header & Navigation
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav__logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav__link {
    font-weight: 500;
    color: var(--dark);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav__link:hover {
    color: var(--primary);
    background: var(--gray-light);
}

.nav__toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    color: var(--dark);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(126, 113, 177, 0.05), rgba(108, 99, 255, 0.05));
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero__text {
    z-index: 2;
}

.hero__title {
    margin-bottom: 1.5rem;
}

.hero__subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--gray);
}

.hero__image {
    position: relative;
    z-index: 2;
}

.hero__image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Decorative elements */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(126, 113, 177, 0.15), transparent);
    border-radius: 50%;
    z-index: 1;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background: #1fb855;
    transform: translateY(-2px);
}

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

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

.btn-lg {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
}

/* ========================================
   Cards
   ======================================== */

.card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    height: 100%;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card__icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.card__title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.card__text {
    color: var(--gray);
    line-height: 1.6;
}

/* ========================================
   Grid System
   ======================================== */

.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* ========================================
   Features Section
   ======================================== */

.features {
    background: var(--light);
}

.section__header {
    text-align: center;
    margin-bottom: 4rem;
}

.section__title {
    margin-bottom: 1rem;
}

.section__subtitle {
    font-size: 1.25rem;
    color: var(--gray);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--dark);
    color: var(--light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer__section h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer__links {
    list-style: none;
}

.footer__link {
    color: var(--gray-light);
    margin-bottom: 0.75rem;
    display: block;
    transition: var(--transition-fast);
}

.footer__link:hover {
    color: var(--primary-light);
    padding-left: 0.5rem;
}

.footer__bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-light);
    color: var(--gray);
}

/* ========================================
   Utilities
   ======================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   WhatsApp Float Button Animation
   ======================================== */

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

a[href*="wa.me"] {
    animation: pulse 2s infinite;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 968px) {
    .footer__content {
        grid-template-columns: 1fr;
    }

    footer [style*="grid-template-columns: 1fr auto"] {
        grid-template-columns: 1fr !important;
        text-align: center;
    }

    footer [style*="grid-template-columns: 1fr auto"] > div:last-child {
        justify-content: center;
    }
    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .nav__menu {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        background: var(--white);
        width: 80%;
        max-width: 400px;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        border-radius: var(--radius-md);
        transition: var(--transition-base);
    }

    .nav__menu.active {
        right: 1rem;
    }

    .nav__toggle {
        display: block;
    }

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

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

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

    .hero {
        min-height: auto;
        padding: 6rem 0 3rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

/* ========================================
   Loading & Animations
   ======================================== */

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth scrolling offset for fixed header */
html {
    scroll-padding-top: 80px;
}