/* Reset e variáveis */
:root {
    /* Cores principais */
    --bg-dark: #0f172a;
    --bg-light: #f0f2f5;
    --card-dark: #1e293b;
    --card-light: #ffffff;
    --text-dark: #f8fafc;
    --text-light: #2c3e50;
    
    /* Cores de entrada */
    --input-bg-dark: #334155;
    --input-bg-light: #ffffff;
    --input-border-dark: #475569;
    --input-border-light: #e5e7eb;
    --input-text-dark: #f1f5f9;
    --input-placeholder-dark: #94a3b8;
    
    /* Cores de destaque */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Efeitos */
    --transition-speed: 0.3s;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --card-border-radius: 1rem;
    --input-border-radius: 0.5rem;
}

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

/* Estilos base */
body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-dark);
    line-height: 1.6;
    transition: all var(--transition-speed);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(79, 70, 229, 0.1) 0%, transparent 20%);
    background-attachment: fixed;
}

/* Modo claro */
body.light-mode {
    background-color: var(--bg-light);
    color: var(--text-light);
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Card do formulário */
.card {
    background-color: var(--card-dark);
    border-radius: var(--card-border-radius);
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.light-mode .card {
    background-color: var(--card-light);
}

/* Logo */
.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-container img {
    max-width: 150px;
    height: auto;
    transition: transform 0.3s;
}

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

/* Formulário */
.form-control, .form-select {
    background-color: var(--input-bg-dark);
    color: var(--input-text-dark);
    border: 1px solid var(--input-border-dark);
    border-radius: var(--input-border-radius);
    transition: all var(--transition-speed);
    padding: 0.75rem 1rem;
    font-size: 1rem;
}

.form-control::placeholder {
    color: var(--input-placeholder-dark);
}

.form-control:hover, .form-select:hover {
    border-color: var(--primary-color);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
    background-color: var(--input-bg-dark);
}

/* Labels */
.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    transition: all var(--transition-speed);
    color: var(--text-dark);
}

.light-mode .form-label {
    color: var(--text-light);
}

/* Texto auxiliar */
.text-muted {
    color: var(--input-placeholder-dark) !important;
}

.light-mode .text-muted {
    color: #6c757d !important;
}

/* Botões */
.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--input-border-radius);
    transition: all var(--transition-speed);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    color: #ffffff;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::after {
    width: 300%;
    height: 300%;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* Validação */
.form-control.is-invalid {
    border-color: var(--error-color);
    background-image: none;
}

.form-control.is-valid {
    border-color: var(--success-color);
    background-image: none;
}

.validation-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.validation-icon i {
    font-size: 1.2rem;
}

.is-valid ~ .validation-icon i {
    color: var(--success-color);
}

.is-invalid ~ .validation-icon i {
    color: var(--error-color);
}

/* Alertas */
.alert {
    border-radius: var(--input-border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.5s ease-out;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.2);
    border-left: 4px solid var(--success-color);
    color: #ffffff;
}

.alert-info {
    background-color: rgba(79, 70, 229, 0.2);
    border-left: 4px solid var(--primary-color);
    color: #ffffff;
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Animações dos elementos */
.logo-container img {
    animation: pulse 2s infinite;
}

.form-control, .form-select, .btn-primary {
    animation: fadeIn 0.5s ease-out backwards;
}

.form-control { animation-delay: 0.2s; }
.form-select { animation-delay: 0.3s; }
.btn-primary { animation-delay: 0.4s; }

.card {
    animation: fadeIn 0.5s ease-out;
}

/* Dark Mode Toggle */
.btn-outline-light {
    border: 2px solid var(--text-dark);
    color: var(--text-dark);
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed);
    backdrop-filter: blur(5px);
}

.btn-outline-light:hover {
    transform: rotate(360deg);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Preview de arquivo */
.preview-container {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--input-border-radius);
    padding: 1rem;
    margin-top: 1rem;
    transition: all var(--transition-speed);
}

.preview-container:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Modo claro */
body.light-mode {
    background-color: var(--bg-light);
    color: var(--text-light);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(79, 70, 229, 0.05) 0%, transparent 20%);
}

.light-mode .card {
    background-color: var(--card-light);
    box-shadow: var(--box-shadow);
}

.light-mode .form-control,
.light-mode .form-select {
    background-color: var(--input-bg-light);
    color: var(--text-light);
    border-color: var(--input-border-light);
}

.light-mode .form-control:focus,
.light-mode .form-select:focus {
    background-color: var(--input-bg-light);
}

.light-mode .btn-outline-light {
    border-color: var(--text-light);
    color: var(--text-light);
}

/* Responsividade */
@media screen and (max-width: 768px) {
    .card {
        margin: 1rem;
        padding: 1.5rem !important;
    }

    .btn-primary {
        padding: 0.875rem 1.5rem;
    }

    .form-control, .form-select {
        font-size: 16px;
    }

    .logo-container img {
        max-width: 120px;
    }
}

/* Loading Spinner e Animações */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes ripple {
    0% {
        width: 0;
        height: 0;
        opacity: 0.5;
    }
    100% {
        width: 300%;
        height: 300%;
        opacity: 0;
    }
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

.fa-spin {
    animation: spin 1s linear infinite;
}

/* Efeito Ripple para botões */
.btn {
    position: relative;
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: ripple 0.6s linear;
}

/* Ícones de validação */
.input-wrapper {
    position: relative;
}

.validation-icon {
    opacity: 0;
    transition: opacity 0.3s ease;
    color: var(--text-dark);
}

.is-valid ~ .validation-icon,
.is-invalid ~ .validation-icon {
    opacity: 1;
}

/* Preview de imagem */
.preview-image {
    position: relative;
    cursor: pointer;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-overlay i {
    color: white;
    font-size: 1.5rem;
}

.preview-image:hover .image-overlay {
    opacity: 1;
}

/* Animações de entrada */
.loaded .card {
    animation: float 6s ease-in-out infinite;
}

.loaded .form-control,
.loaded .form-select,
.loaded .btn {
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}

/* Modal de preview */
.modal-content {
    border: none;
    border-radius: var(--card-border-radius);
    background-color: var(--card-dark);
}

.modal.fade .modal-dialog {
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.modal.show .modal-dialog {
    transform: scale(1);
}

/* Melhorias de acessibilidade */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
}

/* Estado de loading */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Rodapé */
.footer-bottom {
  text-align: center;
  padding-top: clamp(20px, 4vw, 30px);
  border-top: 1px solid var(--border-color);
}