:root {
    /* Light Theme */
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #7209b7;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.1);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
    /* Dark Theme */
    --primary-color: #5a7dff;
    --primary-dark: #4a6cf7;
    --secondary-color: #9d4edd;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    padding: 20px;
    line-height: 1.6;
}

/* Botões de Controle (Tema e Idioma) */
.control-buttons {
    position: fixed;
    top: 24px;
    right: 24px;
    display: flex;
    gap: 12px;
    z-index: 100;
}

.control-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.control-btn:hover {
    transform: rotate(15deg);
    box-shadow: var(--shadow-hover);
}

.language-btn {
    width: auto;
    padding: 0 20px;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Container Principal */
.login-container {
    width: 100%;
    max-width: 440px;
    animation: fadeIn 0.6s ease-out;
}

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

.login-box {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.login-box:hover {
    box-shadow: var(--shadow-hover);
}

/* Cabeçalho */
.login-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    gap: 15px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-container i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo-container h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Instruções */
.instructions {
    background: rgba(67, 97, 238, 0.08);
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    text-align: center;
}

.dark-mode .instructions {
    background: rgba(90, 125, 255, 0.1);
}

.instruction-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.instruction-text strong {
    color: var(--primary-color);
}

.telegram-icon {
    color: #0088cc;
    margin: 0 5px;
}

/* Título do Login */
.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-primary);
}

/* Formulário */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.input-container label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-container label i {
    color: var(--primary-color);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 16px 20px;
    padding-right: 50px;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.input-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.toggle-password {
    position: absolute;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px;
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--primary-color);
}

/* Botão de Envio */
.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 18px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.3);
    background: var(--primary-dark);
}

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

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

/* Links de Ação */
.action-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 30px 0;
}

.action-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 20px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
}

.telegram-link {
    background: rgba(0, 136, 204, 0.1);
    color: #0088cc;
}

.dark-mode .telegram-link {
    background: rgba(0, 136, 204, 0.15);
}

.channel-link {
    background: rgba(114, 9, 183, 0.1);
    color: #7209b7;
}

.dark-mode .channel-link {
    background: rgba(114, 9, 183, 0.15);
}

.action-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.action-link i {
    font-size: 1.2rem;
}

/* Informações de Suporte */
.support-info {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.support-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.support-info i {
    color: var(--primary-color);
    margin-right: 8px;
}

/* Mensagens Flash */
.flash-messages {
    list-style: none;
    margin-top: 24px;
    padding: 16px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 12px;
    border-left: 4px solid var(--error-color);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.flash-messages li {
    color: var(--error-color);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-align: center;
}

/* Modal de Erro */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    backdrop-filter: blur(5px);
    padding: 20px;
}

.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 40px;
    max-width: 440px;
    width: 100%;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    transform: translateY(20px);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
}

.modal-overlay.visible .modal {
    transform: translateY(0);
}

.modal-icon {
    text-align: center;
    font-size: 3rem;
    color: var(--warning-color);
    margin-bottom: 20px;
}

.modal h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.modal-actions {
    display: flex;
    gap: 16px;
    margin-top: 30px;
}

.modal-btn {
    flex: 1;
    padding: 14px 20px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

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

.modal-btn.primary:hover {
    background: var(--primary-dark);
}

.modal-btn.secondary {
    background: var(--background-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

/* Responsividade */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 24px;
    }
    
    .control-buttons {
        top: 16px;
        right: 16px;
    }
    
    .control-btn {
        width: 42px;
        height: 42px;
    }
    
    .language-btn {
        padding: 0 16px;
        font-size: 0.85rem;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .instruction-text {
        font-size: 0.9rem;
    }
}

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

.submit-btn:focus {
    animation: pulse 0.5s ease;
}

/* Spinner para loading */
.fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Estilo para o placeholder */
::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Estilo para mensagens de sucesso */
.success-message {
    background: rgba(16, 185, 129, 0.1) !important;
    border-left: 4px solid var(--success-color) !important;
}

.success-message li {
    color: var(--success-color) !important;
}

/* Idioma selecionado */
.language-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}