/* ============================================
   RESET E VARIÁVEIS
   ============================================ */

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

:root {
    --color-primary: #2c3e50;
    --color-secondary: #3498db;
    --color-success: #27ae60;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    --color-light: #ecf0f1;
    --color-gray: #95a5a6;
    --color-dark: #2c3e50;

    --font-size-base: 16px;
    --font-size-large: 20px;
    --font-size-xlarge: 28px;

    --border-radius: 8px;
    --transition: all 0.3s ease;

    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ============================================
   BODY E LAYOUT GERAL
   ============================================ */

html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: #f5f7fa;
    color: var(--color-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    background-color: white;
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.header h1 {
    font-size: var(--font-size-xlarge);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.header .subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ============================================
   NAVEGAÇÃO (TABS)
   ============================================ */

.nav-tabs {
    display: flex;
    flex-wrap: wrap;
    background-color: var(--color-light);
    border-bottom: 2px solid var(--color-gray);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-btn {
    flex: 1;
    min-width: 100px;
    padding: 1rem;
    background: none;
    border: none;
    color: var(--color-gray);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.nav-btn:active,
.nav-btn:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.nav-btn.active {
    color: var(--color-secondary);
    border-bottom-color: var(--color-secondary);
}

/* ============================================
   TAB CONTENT
   ============================================ */

.tab-content {
    display: none;
    padding: 1rem;
    animation: fadeIn 0.3s ease-in;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   FORMULÁRIO
   ============================================ */

.form-container {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.form-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .form-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--color-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-secondary);
    background-color: rgba(52, 152, 219, 0.05);
}

.form-group input::placeholder {
    color: var(--color-gray);
}

/* ============================================
   BOTÕES
   ============================================ */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: white;
    flex: 1;
    margin-right: 0.5rem;
}

.btn-primary:active,
.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background-color: var(--color-light);
    color: var(--color-dark);
    flex: 1;
}

.btn-secondary:active,
.btn-secondary:hover {
    background-color: #d5dbdb;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-danger:active,
.btn-danger:hover {
    background-color: #c0392b;
}

.btn-edit {
    background-color: var(--color-warning);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-edit:active,
.btn-edit:hover {
    background-color: #e67e22;
}

/* ============================================
   RESULTADO
   ============================================ */

.resultado-container {
    background: linear-gradient(135deg, #ecf0f1 0%, #f5f7fa 100%);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
    border-left: 4px solid var(--color-secondary);
}

.resultado-container h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.resultado-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .resultado-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .resultado-grid {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

.resultado-item {
    background-color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.resultado-item .label {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-bottom: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.resultado-item .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
}

.resultado-item.lucro .value {
    color: var(--color-success);
}

.resultado-item.prejuizo .value {
    color: var(--color-danger);
}

/* ============================================
   HISTÓRICO
   ============================================ */

.historico-container {
    padding: 1.5rem;
}

.historico-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.filtro-mes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.filtro-mes label {
    font-weight: 600;
}

.filtro-mes input {
    flex: 1;
    min-width: 150px;
    padding: 0.5rem;
    border: 2px solid var(--color-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.lista-operacoes {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .lista-operacoes {
        grid-template-columns: 1fr;
    }
}

.operacao-card {
    background-color: white;
    border: 2px solid var(--color-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.operacao-card:active,
.operacao-card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.operacao-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-light);
}

.operacao-header h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
}

.operacao-status {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.operacao-status.lucro {
    background-color: rgba(39, 174, 96, 0.2);
    color: var(--color-success);
}

.operacao-status.prejuizo {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--color-danger);
}

.operacao-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (min-width: 768px) {
    .operacao-info {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.operacao-info-item {
    display: flex;
    flex-direction: column;
}

.operacao-info-item .label {
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.operacao-info-item .value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
}

.operacao-actions {
    display: flex;
    gap: 0.5rem;
}

.operacao-actions .btn {
    flex: 1;
    margin: 0;
}

/* ============================================
   RESUMO MENSAL
   ============================================ */

.resumo-container {
    padding: 1.5rem;
}

.resumo-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.resumo-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

@media (min-width: 768px) {
    .resumo-stats {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .resumo-stats {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.stat-item {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #2980b9 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.stat-item .stat-label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.stat-item .stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 1rem;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-gray);
    transition: var(--transition);
}

.modal-close:active,
.modal-close:hover {
    color: var(--color-dark);
}

.modal h2 {
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

/* ============================================
   MENSAGENS
   ============================================ */

.mensagem {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    max-width: 300px;
    z-index: 2000;
    animation: slideIn 0.3s ease-out;
    box-shadow: var(--shadow-md);
}

.mensagem.hidden {
    display: none;
}

.mensagem.sucesso {
    background-color: var(--color-success);
    color: white;
}

.mensagem.erro {
    background-color: var(--color-danger);
    color: white;
}

.mensagem.info {
    background-color: var(--color-secondary);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============================================
   UTILITÁRIOS
   ============================================ */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 480px) {
    :root {
        --font-size-xlarge: 22px;
        --font-size-large: 18px;
    }

    .header {
        padding: 1.5rem 1rem;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .nav-tabs {
        justify-content: space-between;
    }

    .nav-btn {
        flex: 1;
        min-width: 80px;
        padding: 0.75rem 0.5rem;
        font-size: 0.8rem;
    }

    .tab-content {
        padding: 1rem;
    }

    .form-container,
    .historico-container,
    .resumo-container {
        padding: 1rem;
    }

    .operacao-info {
        grid-template-columns: 1fr;
    }

    .resultado-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .mensagem {
        right: 0.5rem;
        left: 0.5rem;
        max-width: none;
    }

    .btn {
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }
}

/* ============================================
   PRINT
   ============================================ */

@media print {
    .nav-tabs,
    .btn,
    .modal {
        display: none;
    }
}