:root {
    --fundo-site: #f8f9fa; 
    --fundo-card: #ffffff; 
    --verde-principal: #2e7d32;
    --verde-escuro: #1b5e20;
    --verde-claro: #e8f5e9;
    --texto-principal: #111111;
    --texto-secundario: #666666;
    --cor-erro: #d32f2f;
    --cor-alerta: #f57c00;
}

/* ==========================================
   VARIÁVEIS DO MODO ESCURO
   ========================================== */
[data-theme="dark"] {
    --fundo-site: #121212;
    --fundo-card: #1e1e1e;
    --texto-principal: #f5f5f5;
    --texto-secundario: #a0a0a0;
    --verde-principal: #4caf50;
    --verde-escuro: #81c784;
    --verde-claro: #2c3e2e;
    --cor-erro: #ef5350;
    --cor-alerta: #ffb74d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--fundo-site);
    color: var(--texto-principal);
    -webkit-font-smoothing: antialiased; 
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ==========================================
   CABEÇALHO MINIMALISTA
   ========================================== */
header {
    background-color: var(--fundo-card);
    text-align: center;
    padding: 2.5rem 1rem 2rem;
    box-shadow: 0 1px 15px rgba(0,0,0,0.03); 
    margin-bottom: 2.5rem;
    position: relative; /* Necessário para posicionar o botão */
    transition: background-color 0.3s ease;
}

header h1 {
    color: var(--verde-principal);
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 0.3rem;
}

header p {
    color: var(--texto-secundario);
    font-weight: 500;
    font-size: 1.1rem;
}

main {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    padding: 0 1rem;
}

/* ==========================================
   CARTÕES PRINCIPAIS
   ========================================== */
.avulsa-main-card {
    background: var(--fundo-card); 
    padding: 2.5rem 2rem;
    border-radius: 20px;
    border: none; 
    box-shadow: 0 8px 30px rgba(0,0,0,0.04); 
    transition: background-color 0.3s ease;
}

.avulsa-main-card h2 {
    color: var(--texto-principal);
    margin-bottom: 0.3rem;
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.avulsa-subtitle {
    margin-bottom: 25px;
    font-size: 1rem;
    color: var(--texto-secundario);
}

/* ==========================================
   INPUTS "INVISÍVEIS"
   ========================================== */
.avulsa-label {
    font-weight: 600;
    color: var(--texto-principal);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.avulsa-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 5px;
}

.avulsa-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.avulsa-label-row label {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--texto-principal);
}

.avulsa-peso-badge {
    background-color: var(--verde-claro); 
    color: var(--verde-escuro);
    font-size: 0.85rem;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
}

.avulsa-input {
    width: 100%;
    padding: 14px 16px !important; 
    background-color: #f4f6f8; 
    border: 2px solid transparent !important; 
    border-radius: 14px !important; 
    font-size: 1.1rem;
    color: var(--texto-principal);
    outline: none;
    transition: all 0.25s ease;
}

[data-theme="dark"] .avulsa-input {
    background-color: #2c2c2c;
}

.avulsa-input::placeholder {
    color: #a0aab5;
}

.avulsa-input:focus {
    background-color: var(--fundo-card); 
    border-color: var(--verde-principal) !important; 
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.1); 
}

/* ==========================================
   PÍLULA DE SELEÇÃO (TOGGLE)
   ========================================== */
.avulsa-segmented-control {
    display: flex;
    background-color: #f4f6f8;
    border-radius: 14px;
    padding: 5px;
}

[data-theme="dark"] .avulsa-segmented-control {
    background-color: #2c2c2c;
}

.avulsa-segment-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--texto-secundario);
    padding: 12px;
    border-radius: 10px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.avulsa-segment-btn.active {
    background: var(--fundo-card);
    color: var(--texto-principal);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* ==========================================
   BOTÕES GERAIS E LAYOUT
   ========================================== */
.avulsa-btn-limpar {
    background-color: #eef0f2; 
    color: var(--texto-secundario);
    border-radius: 25px; 
    padding: 12px 40px;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s;
}

[data-theme="dark"] .avulsa-btn-limpar {
    background-color: #2c2c2c;
}

.avulsa-btn-limpar:hover {
    background-color: #e2e5e9;
}

[data-theme="dark"] .avulsa-btn-limpar:hover {
    background-color: #3d3d3d;
}

.btn-navegacao {
    background-color: var(--verde-principal);
    color: white;
    border: none;
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(46, 125, 50, 0.25);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-navegacao:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(46, 125, 50, 0.35);
}

.btn-voltar {
    background-color: var(--fundo-card);
    color: var(--texto-secundario);
    border: 1px solid #ddd;
    padding: 10px 24px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

[data-theme="dark"] .btn-voltar {
    border-color: #333;
}

.btn-voltar:hover {
    background-color: #f4f6f8;
}

[data-theme="dark"] .btn-voltar:hover {
    background-color: #2c2c2c;
}

/* ==========================================
   CAIXA DE RESULTADO
   ========================================== */
.avulsa-resultado-box {
    background-color: #fafafa; 
    border-radius: 16px;
    padding: 25px;
    text-align: center;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .avulsa-resultado-box {
    background-color: #272727;
}

.avulsa-resultado-box h3 {
    color: var(--texto-principal);
    margin-bottom: 8px;
    font-size: 1.4rem;
    font-weight: 800;
}

.divisor-suave {
    border: 0;
    border-top: 1px solid #e0e0e0;
    margin: 20px 0;
}

[data-theme="dark"] .divisor-suave {
    border-top-color: #444;
}

/* ==========================================
   LISTA DE DISCIPLINAS
   ========================================== */
.form-group-moderno {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.select-moderno {
    flex: 1;
    min-width: 200px;
    cursor: pointer;
}

.btn-adicionar-moderno {
    background-color: var(--verde-principal);
    color: white;
    border: none;
    border-radius: 14px;
    padding: 0 30px;
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.2);
    transition: all 0.2s;
}

.btn-adicionar-moderno:hover {
    background-color: var(--verde-escuro);
}

.disciplinas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); 
    gap: 20px;
}

.disciplina-item {
    background: var(--fundo-card); 
    border: none; 
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.04); 
    transition: transform 0.2s ease, background-color 0.3s ease;
}

.disciplina-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.06);
}

.disciplina-card-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.disciplina-info {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 0; 
}

.disciplina-info h3 {
    color: var(--texto-principal); 
    font-weight: 800; 
    font-size: 1.6rem; 
    margin: 0 0 8px 0;
    letter-spacing: -0.5px;
    word-wrap: break-word; 
    overflow-wrap: break-word;
    line-height: 1.2;
}

.status-aprovado { color: var(--verde-principal); font-weight: bold; font-size: 1.2rem; margin: 0; }
.status-final { color: var(--cor-alerta); font-weight: bold; font-size: 1.2rem; margin: 0; }
.status-reprovado { color: var(--cor-erro); font-weight: bold; font-size: 1.2rem; margin: 0; }
.status-pendente { color: var(--cor-alerta); font-weight: bold; font-size: 1.2rem; margin: 0; }

.media-text {
    color: var(--texto-principal); 
    font-size: 1.2rem;
    margin: 0;
    font-weight: 500; 
}

.tipo-text {
    color: var(--texto-secundario); 
    font-size: 1.1rem;
    margin: 0;
    font-weight: 500; 
}

.disciplina-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-shrink: 0; 
    width: 110px; 
}

.btn-editar {
    background-color: var(--verde-claro); 
    color: var(--verde-escuro); 
    border: none;
    border-radius: 12px;
    padding: 12px 10px;
    font-size: 1.1rem;
    font-weight: 600; 
    cursor: pointer;
    transition: background 0.2s;
    width: 100%;
}
.btn-editar:hover { opacity: 0.8; }

.btn-remover {
    background-color: #ffebee; 
    color: #c62828; 
    border: none;
    border-radius: 12px;
    padding: 12px 10px;
    font-size: 1.1rem;
    font-weight: 600; 
    cursor: pointer;
    transition: background 0.2s;
    width: 100%;
}

[data-theme="dark"] .btn-remover {
    background-color: #3b2020;
    color: #ef5350;
}
.btn-remover:hover { opacity: 0.8; }

/* ==========================================
   MODAL
   ========================================== */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.4); 
    backdrop-filter: blur(4px); 
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000; 
}

[data-theme="dark"] .modal {
    background: rgba(0,0,0,0.7); 
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--fundo-card);
    padding: 2rem;
    border-radius: 20px;
    border: none;
    width: 90%;
    max-width: 500px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.close {
    position: absolute;
    top: 15px; right: 20px;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--texto-secundario);
    transition: color 0.2s;
}

.close:hover {
    color: var(--texto-principal);
}

.hidden {
    display: none !important;
}

/* ==========================================
   ASSINATURA DO DESENVOLVEDOR (FOOTER)
   ========================================== */
.developer-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 50px;
    padding: 20px 0;
    border-top: 1px dashed var(--texto-secundario);
}

.dev-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--verde-principal);
}

.dev-details {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.dev-title {
    font-size: 0.85rem;
    color: var(--texto-secundario);
}

.dev-name {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--verde-principal);
    margin-bottom: 2px;
}

.dev-github {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    color: var(--texto-principal);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.dev-github:hover {
    color: var(--verde-principal);
}

/* ==========================================
   DESIGN DO BOTÃO DE TEMA (MODO ESCURO)
   ========================================== */
.theme-toggle-wrapper {
    position: absolute;
    top: 2rem;
    right: 2rem;
}

.theme-toggle {
    display: inline-block;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.theme-toggle input {
    display: none;
}

.toggle-track {
    width: 64px;
    height: 34px;
    background-color: #eef0f2;
    border-radius: 30px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.05);
    transition: background-color 0.4s ease;
}

.toggle-track svg {
    width: 16px;
    height: 16px;
    z-index: 1;
    transition: color 0.4s ease;
}

.sun-icon { color: #888; }
.moon-icon { color: #ccc; }

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 28px;
    height: 28px;
    background-color: #333;
    border-radius: 50%;
    transition: transform 0.4s cubic-bezier(0.4, 0.0, 0.2, 1), background-color 0.4s;
    z-index: 2;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* Estado Escuro do Botão */
[data-theme="dark"] .toggle-track {
    background-color: #2c2c2c;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.3);
}

[data-theme="dark"] .toggle-thumb {
    transform: translateX(30px);
    background-color: #fff;
}

[data-theme="dark"] .sun-icon { color: #555; }
[data-theme="dark"] .moon-icon { color: #f5f5f5; }

@media (max-width: 450px) {
    .theme-toggle-wrapper {
        top: 1.5rem;
        right: 1.5rem;
        transform: scale(0.85); /* Reduz levemente para caber bem no celular */
    }
}

/* ==========================================
   TOAST NOTIFICATION (Aviso flutuante)
   ========================================== */
.toast {
    visibility: hidden;
    min-width: 280px;
    background-color: var(--verde-principal);
    color: #ffffff;
    text-align: center;
    border-radius: 12px;
    padding: 16px;
    position: fixed;
    z-index: 3000;
    left: 50%;
    bottom: 20px; /* Posição inicial escondida */
    transform: translateX(-50%);
    box-shadow: 0 4px 15px rgba(0,0,0,0.25);
    font-weight: 600;
    font-size: 1.05rem;
    opacity: 0;
    transition: opacity 0.3s ease, bottom 0.3s ease;
}

/* Quando a classe 'show' for adicionada pelo JS, ele sobe e aparece */
.toast.show {
    visibility: visible;
    opacity: 1;
    bottom: 50px; 
}