/* ================================================================
   BASE.CSS — Variáveis de design, reset e estilos globais
   CyberTeens Academy | Refatorado para Design Autêntico
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;600&display=swap');

:root {
    /* Paleta primária — Cibersegurança moderno */
    --primary:      #0d47a1;      /* Azul profundo */
    --primary-alt:  #1565c0;      /* Azul claro */
    --accent:       #ff6f00;      /* Laranja vibrante */
    --accent-light: #ffb74d;      /* Laranja claro */
    --success:      #00897b;      /* Teal escuro */
    --success-light:#26a69a;      /* Teal claro */
    --danger:       #c62828;      /* Vermelho escuro */
    --danger-light: #ef5350;      /* Vermelho claro */
    --white:        #ffffff;

    /* Escala de cinza refinada */
    --gray-50:  #fafbfc;
    --gray-100: #f3f4f6;
    --gray-150: #eef0f5;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Sombras modernizadas */
    --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm:  0 2px 6px rgba(0, 0, 0, 0.08);
    --shadow-md:  0 6px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg:  0 12px 28px rgba(0, 0, 0, 0.15);
    --shadow-xl:  0 20px 48px rgba(0, 0, 0, 0.2);
    --shadow-focus: 0 0 0 3px rgba(13, 71, 161, 0.15);

    /* Border-radius */
    --radius-sm: 6px;
    --radius:    10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-2xl: 24px;

    /* Transições */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Tipografia — Fonts caracterizadas */
    --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', 'Cascadia Code', monospace;
}

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

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

body {
    font-family: var(--font-body);
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Padrão de fundo sutil */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(13, 71, 161, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 111, 0, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ── CONTEÚDO PRINCIPAL ────────────────────────────– */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    position: relative;
    z-index: 1;
}

/* ── SEÇÕES DE PÁGINA ──────────────────────────────── */
.page-section {
    display: none;
    animation: fadeSlideIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.page-section.active {
    display: block;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── CABEÇALHO DE SEÇÃO ────────────────────────────– */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeSlideIn 0.5s ease-out;
}

.section-header .icon-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    font-size: 2.2rem;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, rgba(13, 71, 161, 0.08) 0%, rgba(255, 111, 0, 0.08) 100%);
    border: 2px solid rgba(13, 71, 161, 0.1);
    box-shadow: 0 4px 12px rgba(13, 71, 161, 0.08);
    transition: all var(--transition);
}

.section-header .icon-circle:hover {
    transform: scale(1.1) rotate(5deg);
    border-color: rgba(13, 71, 161, 0.2);
}

.section-header h2 {
    font-size: 2.2rem;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-alt) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header .subtitle {
    color: var(--gray-500);
    font-size: 1.1rem;
    font-weight: 500;
}

/* ── RODAPÉ ────────────────────────────────────────– */
.site-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    text-align: center;
    padding: 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    margin-top: auto;
}