/* Reset e Variáveis CSS Dinâmicas */
:root {
    /* Cores Eucalipto (Padrão) */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #059669;
    --secondary-dark: #047857;
    --accent-color: #f97316;
    --accent-dark: #ea580c;
    
    /* Cores Neutras */
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-elevated: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Bordas */
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transições */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Tipografia */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Tema Pinus */
[data-theme="pinus"] {
    --primary-color: #d97706;
    --primary-dark: #b45309;
    --primary-light: #f59e0b;
    --secondary-color: #92400e;
    --secondary-dark: #78350f;
    --accent-color: #dc2626;
    --accent-dark: #b91c1c;
}

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

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Premium */
.header-premium {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--secondary-color) 100%);
    color: white;
    padding: 24px 0;
    position: relative;
    overflow: hidden;
}

.header-premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.header-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    padding: 8px;
}

.brand-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.brand-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.brand-subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 400;
}

/* Seletor de Madeira */
.wood-selector {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

/* Seletor de Madeira */
.wood-selector {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.wood-label {
    color: white;
    font-weight: 600;
    font-size: 14px;
    opacity: 0.9;
}

.wood-toggle {
    display: flex;
    gap: 10px;
}

.wood-toggle input[type="radio"] {
    display: none;
}

.wood-toggle label {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid transparent;
}

.wood-toggle label:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.wood-toggle input[type="radio"]:checked + label {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Display da Madeira Atual */
.current-wood-display {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    padding: 10px 16px;
    border-radius: 25px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.wood-icon {
    font-size: 18px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.wood-name {
    color: white;
    font-weight: 700;
    font-size: 16px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.wood-status {
    color: rgba(255, 255, 255, 0.8);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .wood-selector {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .current-wood-display {
        align-self: stretch;
        justify-content: center;
    }
}

/* Material Info Cards */
.material-info {
    padding: 40px 0;
    background: linear-gradient(to bottom, var(--background), var(--surface-elevated));
}

.material-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.material-card {
    position: relative;
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
    opacity: 0.6;
    transform: scale(0.95);
}

.material-card.active {
    opacity: 1;
    transform: scale(1);
    box-shadow: var(--shadow-lg);
}

.material-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color)10, transparent 70%);
    opacity: 0.1;
}

.eucalipto-card .card-background {
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: url('assets/eucalipto-texture.jpg') center/cover;
    opacity: 0.1;
    border-radius: 0 var(--radius-lg) 0 100%;
}

.pinus-card .card-background {
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: url('assets/pinus-texture.jpg') center/cover;
    opacity: 0.1;
    border-radius: 0 var(--radius-lg) 0 100%;
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.card-properties {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.property {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
}

.property:last-child {
    border-bottom: none;
}

.property-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.property-value {
    font-weight: 600;
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 60px 0;
}

.calculation-section {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.calculation-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.calculation-section:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 32px;
}

.section-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Forms */
.calculation-form {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    align-items: end;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-label {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.label-text {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.label-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.input-wrapper,
.select-wrapper {
    position: relative;
}

.input-field,
.select-field {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--surface);
    color: var(--text-primary);
}

.input-wrapper .input-field {
    padding-right: 50px;
}

.input-unit {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
}

.input-field:focus,
.select-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-field.error,
.select-field.error {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Buttons */
.button-group {
    display: flex;
    justify-content: center;
}

.calculate-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.calculate-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.calculate-btn.secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.calculate-btn:active {
    transform: translateY(0);
}

.calculate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Results */
.result-container {
    background: linear-gradient(135deg, var(--surface-elevated), var(--surface));
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    animation: slideIn 0.5s ease-out;
}

.result-container.hidden {
    display: none;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.result-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.result-badge {
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.result-card {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 16px;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.result-card.primary .result-icon {
    background: var(--primary-color);
}

.result-card.secondary .result-icon {
    background: var(--secondary-color);
}

.result-card.accent .result-icon {
    background: var(--accent-color);
}

.result-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.result-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Balanço Visualization */
.balanco-visualization {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: center;
}

.diagram-container {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    min-height: 200px;
}

.balanco-diagram {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.balanco-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.info-icon {
    font-size: 1.5rem;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Footer Premium */
.footer-premium {
    background: var(--text-primary);
    color: white;
    padding: 40px 0;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    align-items: center;
}

.footer-brand {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.footer-text {
    opacity: 0.9;
    line-height: 1.6;
    max-width: 600px;
}

.footer-credits {
    text-align: right;
}

.footer-credits p {
    margin-bottom: 12px;
    opacity: 0.8;
}

.tech-badges {
    display: flex;
    gap: 8px;
}

.tech-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Seletor de Modo de Balanço */
.balanco-mode-selector {
    margin-bottom: 32px;
    padding: 24px;
    background: var(--surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.mode-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-align: center;
    font-size: 1.1rem;
}

.mode-toggle {
    position: relative;
}

.mode-toggle input[type="radio"] {
    display: none;
}

.mode-switch {
    display: flex;
    background: var(--surface);
    border-radius: 50px;
    padding: 4px;
    position: relative;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.mode-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-radius: 46px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    z-index: 2;
    font-weight: 500;
    font-size: 0.95rem;
    flex: 1;
    justify-content: center;
    color: var(--text-secondary);
}

.mode-slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 42px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

#mode-balanco:checked ~ .mode-switch .mode-slider {
    transform: translateX(100%);
}

#mode-vao:checked ~ .mode-switch .mode-option[for="mode-vao"],
#mode-balanco:checked ~ .mode-switch .mode-option[for="mode-balanco"] {
    color: white;
}

.mode-icon {
    font-size: 1.2rem;
}

/* Inputs condicionais */
.mode-vao-input,
.mode-balanco-input {
    transition: var(--transition);
}

.mode-balanco-input.hidden,
.mode-vao-input.hidden {
    display: none;
}

/* Desenho da Viga */
.beam-diagram-container {
    margin: 24px 0;
    padding: 24px;
    background: var(--surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.diagram-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-align: center;
}

.beam-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    margin-bottom: 16px;
}

.beam-dimensions {
    display: flex;
    justify-content: space-around;
    gap: 24px;
    flex-wrap: wrap;
}

.dimension-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.dimension-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.dimension-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    padding: 8px 16px;
    background: rgba(var(--primary-rgb), 0.1);
    border-radius: var(--radius);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
}

/* Diagramas dos Tipos de Balanço */
.balance-types-container {
    margin: 24px 0;
    padding: 24px;
    background: var(--surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.balance-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 16px;
}

.balance-type-card {
    padding: 20px;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

.balance-type-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.balance-type-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.balance-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 120px;
    margin: 16px 0;
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: var(--radius);
    border: 1px dashed rgba(var(--primary-rgb), 0.2);
}

.balance-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

/* Responsive para diagramas de balanço */
@media (max-width: 768px) {
    .balance-types-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .balance-diagram {
        min-height: 100px;
    }
    
    .balance-type-card {
        padding: 16px;
    }
}
@media (max-width: 768px) {
    .beam-diagram {
        min-height: 150px;
    }
    
    .beam-dimensions {
        gap: 16px;
    }
    
    .dimension-value {
        font-size: 1rem;
        padding: 6px 12px;
    }
}
@media (max-width: 768px) {
    .mode-option {
        padding: 12px 16px;
        font-size: 0.9rem;
        gap: 8px;
    }
    
    .mode-option .mode-text {
        display: none;
    }
    
    .mode-icon {
        font-size: 1.4rem;
    }
}
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .brand {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .wood-selector {
        align-items: center;
    }
    
    .material-cards {
        grid-template-columns: 1fr;
    }
    
    .calculation-section {
        padding: 24px;
        margin-bottom: 24px;
    }
    
    .section-header {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .balanco-visualization {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 24px;
    }
    
    .footer-credits {
        text-align: center;
    }
    
    .tech-badges {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .brand-title {
        font-size: 1.5rem;
    }
    
    .toggle-option {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    .calculation-section {
        padding: 20px;
    }
    
    .section-icon {
        width: 48px;
        height: 48px;
    }
    
    .result-card {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
}