/* Variáveis globais */
:root {
    --primary-color: #40A6B9;      /* Azul suave inspirado na logo */
    --secondary-color: #2C7A8A;    /* Azul mais escuro e sutil */
    --accent-color: #5CBFAA;       /* Verde suave */
    --background-color: #FAFAFA;   /* Cinza quase branco */
    --card-background: #FFFFFF;    /* Branco puro */
    --text-color: #2C3E50;        /* Azul acinzentado escuro */
    --border-color: #E8E8E8;      /* Cinza muito claro */
    --input-background: #FFFFFF;   /* Branco puro */
    --input-focus: #87CEEB;       /* Azul céu claro */
    --input-text: #2C3E50;        /* Azul acinzentado escuro */
    --shadow-color: rgba(0, 0, 0, 0.05); /* Sombra sutil */
    --transition: all 0.3s ease;
}

/* Dark mode */
[data-theme="dark"] {
    --primary-color: #87CEEB;      /* Azul céu claro */
    --secondary-color: #40A6B9;    /* Azul suave */
    --accent-color: #7FCFBD;       /* Verde suave claro */
    --background-color: #1A1A1A;   /* Quase preto */
    --card-background: #2D2D2D;    /* Cinza escuro */
    --text-color: #E0E0E0;        /* Cinza muito claro */
    --border-color: #404040;      /* Cinza médio */
    --input-background: #363636;   /* Cinza escuro */
    --input-focus: #87CEEB;       /* Azul céu claro */
    --input-text: #E0E0E0;        /* Cinza muito claro */
    --shadow-color: rgba(0, 0, 0, 0.2); /* Sombra mais pronunciada */
}

/* Tema toggle button */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

.btn-theme {
    background: var(--card-background);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-theme:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.sun-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

/* Reset e estilos base */
body {
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.5;
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    background-color: var(--card-background);
    transition: var(--transition);
}

/* Blocos do formulário */
fieldset {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--background-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

fieldset:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* Títulos do formulário */
legend {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    padding: 0 1rem;
    background-color: var(--card-background);
    border-radius: 6px;
}

/* Campos de formulário */
.form-control {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    transition: var(--transition);
    background-color: var(--input-background);
    color: var(--input-text);
}

.form-control:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
    outline: none;
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--input-background);
    opacity: 0.7;
}

/* Form row */
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 0;
    width: 100%;
}

.form-row .col-lg {
    flex: 1;
    min-width: 0; /* Previne overflow em telas pequenas */
}

/* Labels */
label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    display: block;
    white-space: nowrap; /* Mantém o label em uma linha */
}

/* Logo */
.logo {
    width: 180px;
    margin: 0 auto 2rem;
    display: block;
    transition: var(--transition);
    filter: var(--logo-filter);
}

.logo:hover {
    transform: scale(1.05);
}

/* Botões */
.buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-1px);
}

/* Responsividade */
@media (max-width: 1200px) {
    .form-row {
        flex-wrap: wrap;
    }
    
    .form-row .col-lg {
        flex: 1 1 30%; /* 3 campos por linha */
        min-width: 150px;
    }
}

@media (max-width: 992px) {
    .form-row .col-lg {
        flex: 1 1 45%; /* 2 campos por linha */
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    fieldset {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .form-row .col-lg {
        flex: 1 1 100%; /* 1 campo por linha */
    }
}