/* ====================================
   GUIA DE MATEMÁTICA - LETÍCIA (7º ANO)
   Cores: Black, #121212, #8A4C57
   ==================================== */

/* === RESET E BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #000000;
    padding: 10px;
    line-height: 1.6;
    color: #e0e0e0;
    overflow-x: hidden;
}

/* === CONTAINER === */
.container {
    max-width: 1000px;
    margin: 0 auto;
    background: #121212;
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(138, 76, 87, 0.2);
}

/* === NAVEGAÇÃO === */
.navbar {
    background: #121212;
    padding: 15px 20px;
    border-radius: 15px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #2a2a2a;
}

.btn-voltar {
    background: #8A4C57;
    color: #f0f0f0;
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1em;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.btn-voltar:hover {
    background: #9A5C67;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(138, 76, 87, 0.3);
}

/* === TIPOGRAFIA === */
h1 {
    color: #8A4C57;
    text-align: center;
    font-size: 2em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(138, 76, 87, 0.4);
}

h2 {
    color: #A85F6B;
    font-size: 1.6em;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

h3 {
    color: #A85F6B;
    font-size: 1.3em;
    margin: 20px 0 15px 0;
    border-bottom: 2px dashed #8A4C57;
    padding-bottom: 8px;
}

.subtitle {
    text-align: center;
    color: #A85F6B;
    font-size: 1em;
    margin-bottom: 20px;
    font-style: italic;
}

/* === SEÇÕES E CARDS === */
.section {
    margin: 30px 0;
    padding: 20px;
    background: #1a1a1a;
    border-radius: 15px;
    border-left: 5px solid #8A4C57;
}

.card {
    background: #121212;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid #8A4C57;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(138, 76, 87, 0.4);
    border-color: #9A5C67;
}

.card h4 {
    color: #A85F6B;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.card p {
    color: #e0e0e0;
    margin: 8px 0;
}

/* === GRID DE CARDS === */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}

/* === BOTÕES === */
.btn-primary {
    background: #8A4C57;
    color: #f0f0f0;
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.05em;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-primary:hover {
    background: #9A5C67;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(138, 76, 87, 0.4);
}

.btn-secondary {
    background: #2a2a2a;
    color: #e0e0e0;
    padding: 12px 25px;
    border: 2px solid #8A4C57;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.05em;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-secondary:hover {
    background: #8A4C57;
    color: #f0f0f0;
}

/* === FÓRMULAS === */
.formula-box {
    background: #121212;
    border: 3px solid #8A4C57;
    border-radius: 12px;
    padding: 15px;
    margin: 20px 0;
    box-shadow: 0 4px 12px rgba(138, 76, 87, 0.3);
}

.formula {
    font-size: 1.2em;
    text-align: center;
    color: #A85F6B;
    font-weight: bold;
    padding: 15px;
    background: #1a1a1a;
    border-radius: 8px;
    margin: 10px 0;
}

/* === EXEMPLOS E PASSOS === */
.example {
    background: #121212;
    border-left: 4px solid #8A4C57;
    padding: 15px;
    margin: 20px 0;
    border-radius: 8px;
}

.example-title {
    color: #A85F6B;
    font-weight: bold;
    font-size: 1.1em;
    margin-bottom: 10px;
}

.step {
    background: #1a1a1a;
    padding: 12px;
    margin: 12px 0;
    border-radius: 8px;
    border-left: 4px solid #8A4C57;
}

.step-number {
    color: #8A4C57;
    font-weight: bold;
    font-size: 1em;
}

/* === DICAS E NOTAS === */
.tip {
    background: #121212;
    border: 2px solid #8A4C57;
    border-radius: 10px;
    padding: 15px;
    margin: 20px 0;
}

.tip-icon {
    color: #8A4C57;
    font-size: 1.3em;
    font-weight: bold;
}

.note {
    background: #121212;
    border: 2px dashed #8A4C57;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    font-style: italic;
}

.highlight {
    background: #2a1a1f;
    padding: 3px 8px;
    border-radius: 5px;
    color: #A85F6B;
    font-weight: bold;
}

/* === EXERCÍCIOS === */
.exercicio-item {
    background: #121212;
    padding: 20px;
    margin: 15px 0;
    border-radius: 12px;
    border: 2px solid #2a2a2a;
}

.exercicio-item input {
    background: #1a1a1a;
    border: 2px solid #8A4C57;
    color: #e0e0e0;
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 1em;
    width: 100%;
    max-width: 300px;
    margin-top: 10px;
}

.exercicio-item input:focus {
    outline: none;
    border-color: #9A5C67;
    box-shadow: 0 0 10px rgba(138, 76, 87, 0.3);
}

.feedback-correto {
    background: #1a3a1a;
    border-left: 4px solid #4caf50;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    color: #90ee90;
}

.feedback-errado {
    background: #3a1a1a;
    border-left: 4px solid #f44336;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    color: #ffcdd2;
}

.placar {
    background: #121212;
    border: 3px solid #8A4C57;
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    margin: 20px 0;
    font-size: 1.5em;
    color: #A85F6B;
    font-weight: bold;
}

/* === TABELAS === */
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #121212;
    border-radius: 8px;
    overflow: hidden;
    display: block;
    overflow-x: auto;
}

.table thead,
.table tbody {
    display: table;
    width: 100%;
    table-layout: fixed;
}

.table th {
    background: #8A4C57;
    color: #f0f0f0;
    padding: 12px;
    text-align: left;
    font-weight: bold;
}

.table td {
    padding: 10px 12px;
    border-bottom: 1px solid #2a2a2a;
    color: #e0e0e0;
}

.table tr:hover {
    background: #1a1a1a;
}

.table tr:last-child td {
    border-bottom: none;
}

/* === ÍCONES === */
.icon {
    font-size: 1.3em;
}

.icon-large {
    font-size: 3em;
    margin-bottom: 15px;
}

/* === MACETES === */
.macete-card {
    background: #121212;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid #8A4C57;
    margin: 15px 0;
    transition: all 0.3s ease;
}

.macete-card:hover {
    transform: translateX(5px);
    box-shadow: -5px 5px 15px rgba(138, 76, 87, 0.3);
}

.macete-titulo {
    color: #A85F6B;
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 10px;
}

.macete-texto {
    color: #e0e0e0;
    line-height: 1.7;
}

/* === DIAGRAMAS === */
.diagram-svg {
    max-width: 300px;
    margin: 20px auto;
    display: block;
}

/* === RESPONSIVIDADE === */

/* Tablets grandes */
@media (max-width: 1024px) {
    .container {
        padding: 25px;
    }

    h1 {
        font-size: 1.8em;
    }

    h2 {
        font-size: 1.5em;
    }
}

/* Tablets */
@media (max-width: 768px) {
    body {
        padding: 8px;
    }

    .container {
        padding: 15px;
        border-radius: 12px;
    }

    h1 {
        font-size: 1.6em;
    }

    h2 {
        font-size: 1.4em;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .navbar {
        flex-direction: column;
        gap: 10px;
    }
}

/* Celulares grandes */
@media (max-width: 600px) {
    body {
        padding: 5px;
        font-size: 16px;
    }

    .container {
        padding: 12px;
    }

    h1 {
        font-size: 1.4em;
    }

    h2 {
        font-size: 1.2em;
    }

    .btn-primary,
    .btn-secondary {
        padding: 10px 20px;
        font-size: 1em;
        width: 100%;
    }

    .card {
        padding: 15px;
    }

    .formula {
        font-size: 1em;
        padding: 10px;
    }
}

/* Celulares pequenos */
@media (max-width: 480px) {
    body {
        padding: 3px;
        font-size: 15px;
    }

    .container {
        padding: 10px;
    }

    h1 {
        font-size: 1.3em;
    }

    h2 {
        font-size: 1.15em;
    }

    .section {
        padding: 12px;
        margin: 15px 0;
    }
}

/* === ACESSIBILIDADE === */
a {
    color: #A85F6B;
    text-decoration: underline;
}

a:hover {
    color: #9A5C67;
}

ul,
ol {
    padding-left: 25px;
    margin: 10px 0;
}

li {
    margin: 8px 0;
    line-height: 1.7;
}

p {
    margin: 10px 0;
    line-height: 1.7;
}

/* === ANIMAÇÕES === */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease;
}

/* === IMPRESSÃO === */
@media print {
    body {
        background: white;
        color: black;
    }

    .container {
        box-shadow: none;
        background: white;
    }

    .btn-voltar,
    .navbar {
        display: none;
    }

    h1, h2, h3 {
        color: #8A4C57;
    }
}

/* === LOADING === */
.loading {
    text-align: center;
    padding: 20px;
    color: #A85F6B;
    font-size: 1.2em;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}