/* AIWeby - Main Stylesheet */
/* Based on Brand Guidelines v1.0 */

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

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

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    color: #1E293B;
    background: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.7;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* ===== COLORS ===== */
:root {
    /* Primary Colors */
    --color-sky: #0EA5E9;
    --color-indigo: #6366F1;
    --color-purple: #8B5CF6;
    --color-cyan: #06B6D4;
    --color-blue: #3B82F6;

    /* Neutral Colors */
    --color-slate-900: #1E293B;
    --color-slate-600: #475569;
    --color-slate-400: #94A3B8;
    --color-slate-100: #F1F5F9;
    --color-white: #FFFFFF;

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #0EA5E9 0%, #6366F1 50%, #8B5CF6 100%);
    --gradient-accent: linear-gradient(90deg, #06B6D4 0%, #3B82F6 100%);
    --gradient-subtle: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 50%;

    /* Container */
    --container-max: 1280px;
}

/* ===== CONTAINER ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 3.75rem);
}

.container-fluid {
    width: 100%;
    padding: 0 clamp(1.5rem, 5vw, 3.75rem);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.25rem 0;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-md);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    color: var(--color-slate-600);
    font-weight: 500;
    font-size: 0.9375rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

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

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

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 1.5rem;
    height: 0.125rem;
    background: var(--color-slate-900);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
    letter-spacing: 0.025em;
}

.btn-primary {
    background: var(--gradient-brand);
    color: var(--color-white);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.35);
}

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

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

.btn-large {
    padding: 1.25rem 2.75rem;
    font-size: 1.125rem;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--gradient-brand);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
    padding: 8rem 0 6rem;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><circle cx="300" cy="200" r="300" fill="%23ffffff" opacity="0.03"/><circle cx="900" cy="600" r="400" fill="%23ffffff" opacity="0.04"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero p {
    font-size: 1.375rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.7;
}

/* ===== SECTIONS ===== */
.section {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3.5rem;
    color: var(--color-slate-900);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--color-slate-600);
    margin-bottom: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-alt {
    background: var(--gradient-subtle);
}

/* ===== CARDS ===== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.card-gradient {
    position: relative;
    background: var(--color-white);
}

.card-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 2px;
    background: var(--gradient-brand);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

/* ===== GRID LAYOUTS ===== */
.grid {
    display: grid;
    gap: 2rem;
}

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

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ===== UTILITIES ===== */
.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }

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

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.animated-gradient {
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
}

/* ===== WHATSAPP BUTTON ===== */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background: #25D366;
    color: white;
    border-radius: 50%;
    text-align: center;
    font-size: 30px;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
}

/* ===== FOOTER ===== */
footer {
    background: var(--color-slate-900);
    color: var(--color-slate-400);
    padding: 4rem 0 2rem;
}

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

.footer-section h3 {
    color: var(--color-white);
    margin-bottom: 1.25rem;
    font-size: 1.25rem;
}

.footer-section p, .footer-section a {
    margin: 0.75rem 0;
    font-size: 0.9375rem;
}

.footer-section a:hover {
    color: var(--color-indigo);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.875rem;
}

.footer-ai-badge {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1.25rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-indigo);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: 80vh;
        padding: 6rem 0 4rem;
    }

    .section {
        padding: 4rem 0;
    }

    .whatsapp-float {
        width: 50px;
        height: 50px;
        font-size: 24px;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .btn {
        padding: 0.875rem 1.75rem;
        font-size: 0.9375rem;
    }
}