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

body {
    display: flex;
    flex-direction: column;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f1f5f9;
    color: #1e293b;
    min-height: 100vh;
}

/* HEADER */
header {
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    color: white;
    text-align: center;
    padding: 30px 20px;
}

header h1 {
    font-size: 2.2rem;
}

header p {
    opacity: 0.9;
}

/* NAV */
nav {
    background: #4338ca;
    text-align: center;
    padding: 12px;
}

nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

/* SEÇÕES */
section {
    padding: 40px 20px;
    max-width: 1000px;
    margin: auto;
}

/* HERO */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.hero img {
    border-radius: 10px;
}

.cards {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-top: 30px;
}

/* CARD */
.card {
    text-decoration: none;
    color: inherit;
    display: block;
    background: linear-gradient(145deg, #ffffff, #f5f7fa);
    padding: 24px;
    border-radius: 16px;
    flex: 1;
    min-width: 260px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* hover card */
.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

/* titulo card */
.card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
    color: #333;
}

/* texto card */
.card p {
    color: #666;
    line-height: 1.5;
    font-size: 0.95rem;
}

/* SOBRE */
.sobre {
    background: #e0e7ff;
    border-radius: 12px;
}

/* FORMULARIO */
form {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin-top: 15px;
}

input, textarea {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 6px;
    border: 1px solid #ccc;
}

button {
    background: #4f46e5;
    color: white;
    border: none;
    padding: 10px;
    width: 100%;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #4338ca;
}

/* FOOTER */
footer {
    background: #1e293b;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: 30px;
}

/* FERRAMENTAS */

/* Espaçamento 1 */
.categoria-ferramentas {
    margin-bottom: 40px;
    font-family: sans-serif;
}

/* Estilização titulo */
.categoria-ferramentas h3 {
    color: #333;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-bottom: 15px;
}

/* Configuração lista */
.categoria-ferramentas ul {
    list-style: none;
    padding: 0;
}

/* Espaçamento 2 */
.categoria-ferramentas li {
    margin-bottom: 12px;
    line-height: 1.6;
    color: #555;
}

/* Estilização dos links */
.categoria-ferramentas a {
    text-decoration: none;
    color: #007bff;
    transition: 0.2s;
}

.categoria-ferramentas a:hover {
    text-decoration: underline;
    color: #0056b3;
}

/* MATERIAL 1 */
.manual-nota10 {
    background-color: #f0f4f8;
    padding: 30px;
    border-radius: 8px;
    font-family: sans-serif;
    color: #1a1a1a;
}

.topico h3 {
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 5px;
    color: #0d1117;
}

.topico p {
    font-size: 1.1rem;
    margin: 0;
    color: #333;
}

/* MATERIAL 2 */
.manual-rotina {
    background-color: #f4f7f6;
    padding: 30px;
    border-radius: 15px;
    font-family: 'Segoe UI', sans-serif;
}

.exemplo-agenda {
    margin-top: 40px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.exemplo-agenda h3 {
    text-align: center;
    color: #3498db;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #3498db;
    color: white;
    font-weight: 600;
}

tr:hover {
    background-color: #f9f9f9;
}

.dica-agenda {
    font-size: 0.9rem;
    color: #7f8c8d;
    font-style: italic;
    text-align: center;
}

/* MATERIAL 3 */
.manual-selva {
    max-width: 800px;
    margin: 20px auto;
    padding: 40px;
    background-color: #f8fbff; /* Azul clarinho sutil */
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    font-family: 'Inter', -apple-system, sans-serif;
}

.topico {
    margin-bottom: 35px;
    border-left: 4px solid #3498db; /* Barra de destaque lateral */
    padding-left: 20px;
}

.topico h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.topico p {
    font-size: 1.1rem;
    color: #546e7a;
    line-height: 1.6;
    margin: 0;
}

.topico:hover {
    border-left-color: #2ecc71; /* Muda para verde ao interagir */
    transition: 0.3s;
}

.materiais {
    flex: 1;
}