/**
 * Congresso AVAG 2027 - Design System & Variáveis Globais
 * Edição Comemorativa: 80 Anos da Aviação Agrícola no Brasil
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Montserrat:ital,wght@0,500;0,600;0,700;0,800;0,900;1,700&display=swap');

:root {
    /* Cores Institucionais Principais */
    --avag-primary: #0e2b5c;
    --avag-primary-dark: #071b3b;
    --avag-primary-light: #1e40af;
    --avag-primary-soft: #eef4ff;

    /* Acentos 80 Anos */
    --avag-gold: #c59b27;
    --avag-gold-hover: #b3891d;
    --avag-gold-light: #fef9ea;
    --avag-green: #14723c;
    --avag-yellow: #f5b800;
    --avag-sky: #3ba7b6;

    /* Superfícies e Fundos */
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-alt: #f1f5f9;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    /* Textos */
    --text-heading: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;

    /* Tipografia */
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Sombras */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow-gold: 0 0 25px rgba(197, 155, 39, 0.35);

    /* Arredondamento */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Larguras de Container */
    --container-max-width: 1280px;
    --container-padding: 1.5rem;
}

/* Reset Básico e Estrutura */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    color: var(--text-body);
    background-color: var(--bg-body);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main#primary {
    flex: 1 0 auto;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.25;
}

/* Container Responsivo */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* Botões do Sistema */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--avag-primary);
    color: var(--text-white);
    border-color: var(--avag-primary);
}

.btn-primary:hover {
    background-color: var(--avag-primary-dark);
    border-color: var(--avag-primary-dark);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-gold {
    background-color: var(--avag-gold);
    color: #ffffff;
    border-color: var(--avag-gold);
    font-weight: 800;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-gold:hover {
    background-color: var(--avag-gold-hover);
    border-color: var(--avag-gold-hover);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-gold);
}

.btn-outline-white {
    background-color: transparent;
    color: var(--text-white);
    border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-white:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--text-white);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background-color: #25D366;
    color: #ffffff;
    border-color: #25D366;
}

.btn-whatsapp:hover {
    background-color: #1ebc59;
    border-color: #1ebc59;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.35);
}

/* Badges e Selos */
.badge-gold {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(245, 184, 0, 0.4);
    letter-spacing: 0.03em;
    text-transform: uppercase;
}